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{{Short description|Spiral galaxy in the constellation Canes Venatici}} |
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{{Infobox Galaxy |
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{{Infobox Galaxy |
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| name = Messier 63 |
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| name = Messier 63 |
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| image = ] |
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| image = M63 (NGC 5055).jpg |
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| caption = Image taken by ], on 16 November 2001 at 450 and 814 nm<ref name=NASA/> |
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| caption = M63 from ] sky survey |
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| credit = ] / ] |
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| credit = |
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| epoch = ] |
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| epoch = ] |
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| constellation name = ] |
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| ra = {{RA|13|15|49.3}}<ref name="ned">{{cite web |
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| ra = {{RA|13|15|49.27385}}<ref name=GaiaDR2/> |
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| dec = {{DEC|+42|01|45.7261}}<ref name=GaiaDR2/> |
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| z = 484 km/]<ref name="ned" /> |
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| dist_ly = {{Convert|8.99|Mpc|Mly|order=flip|lk=on|abbr=on}}<ref name=Tully2016/> |
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| appmag_v = 9.3<ref name="ned" /> |
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| type = SAbc<ref name=Ann2015/> |
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| size_v = 12.6{{prime}} × 7.2{{prime}}<ref name="ned" /> |
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| group_cluster = ] |
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| names = ]63, ] 5055, ] 46153, ] 8334<ref name="ned" /> |
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}} |
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] |
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'''Messier 63''' or '''M63''', also known as '''NGC 5055''' or the seldom-used '''Sunflower Galaxy''',<ref name=Garfinkle1997/> is a ] in the northern ] of ] with approximately 400 billion stars.<ref>{{Cite web|title=Messier 63 - M63 - The Sunflower Galaxy (Spiral Galaxy) {{!}} freestarcharts.com|url=https://freestarcharts.com/messier-63|access-date=2020-06-23|website=freestarcharts.com}}</ref> M63 was first discovered by the French astronomer ], then later verified by his colleague ] on 14 June 1779.<ref name=Garfinkle1997/> The galaxy became listed as object 63 in the ]. In the mid-19th century, Anglo-Irish astronomer ] identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.<ref name=jonesbook1991/> |
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The shape or morphology of this galaxy has a ] of SAbc,<ref name=Ann2015/> indicating a spiral form with no central ] (SA) and moderate to loosely wound ] (bc). There is a general lack of large-scale continuous spiral structure in visible light, so it is considered a '']''. However, when observed in the ], a symmetric, two-arm structure is seen. Each arm wraps 150° around the galaxy and extends out to {{convert|4000|pc|lk=on|order=flip|abbr=off}} from the nucleus.<ref name=Thornley1996/> |
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M63 is a weakly ] with a ] nucleus – short for 'low-ionization nuclear emission-line region'. This displays as an unresolved source at the galactic nucleus that is cloaked in a diffuse ]. The latter is extended along a ] of 110° relative to the ], and both ]s and hydrogen (]) emission can be observed coming from along nearly the same direction.<ref name=Masegosa2011/> The existence of a ] (SMBH) at the nucleus is uncertain; if it does exist, then the mass is estimated as {{Val|8.5e8|1.9|ul=solar mass}},<ref name=Graham2008/> or around 850 million times the mass of the Sun. |
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Radio observations at the ] hydrogen line show the gaseous disk of M63 extends outward to a radius of {{Convert|40|kpc|ly|abbr=off|order=flip}}, well past the bright optical disk. This gas shows a symmetrical form that is warped in a pronounced manner, starting at a radius of {{Convert|10|kpc|ly|order=flip|abbr=off}}. The form suggests a ] halo that is offset with respect to the inner region. The reason for the warp is unclear, but the position angle points toward the smaller companion galaxy, UGC 8313.<ref name=Battaglia2006/> |
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The distance to M63, based upon the luminosity-distance measurement is {{Convert|8.99|Mpc|ly|order=flip|abbr=off}}.<ref name=Tully2016/> The ] relative to the ] yields an estimate of {{Convert|4.65|Mpc|ly|order=flip|abbr=off}}.<ref name=Ann2015/> Estimates based on the ] range over {{Convert|5.0|–|10.3|Mpc|ly|abbr=off|order=flip}}. The ] technique gives a distance of {{Convert|8.87|±|0.29|Mpc|ly|order=flip|abbr=off}}.<ref name=McQuinn2017/> M63 is part of the ], a group of galaxies that also includes ] (the 'Whirlpool Galaxy').<ref name=Tikhonov2009/> |
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One ] has been observed in M63: {{nowrap|SN 1971I}} (], mag. 11.8) was discovered by Glenn Jolly on 24 May 1971, and was discovered independently by Roger Clark on 29 May 1971.<ref name=Deming1973 /><ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}1971I | url=https://www.wis-tns.org/object/1971I | publisher = ] | access-date=2 December 2024}}</ref> It reached peak light around 26 May.<ref name=Barbon1973/> While the spectrum was consistent with a supernova of type I, the spectroscopic behavior appeared anomalous.<ref name=Deming1973/> |
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==Gallery== |
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<gallery widths="220px" heights="220px"> |
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File:Messier 63 GALEX WikiSky.jpg|M63 imaged in ] light by the ] satellite. The UV light is produced primarily by young, massive stars, so the UV-bright areas are regions where stars are currently forming.<ref name="Bai"/> Credit ] / ] |
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File:M63 3.6 8.0 24 microns spitzer.png|Messier 63 seen in the ] by the ]. The infrared radiation traces the dust within the spiral arms, which does not radiate visible light. A small dust ring can be seen just outside of the galaxy's center.<ref name="spitzer">{{cite web |last1=spitzer |title=Spitzer's Sunflower |url=https://www.spitzer.caltech.edu/image/sig11-002-spitzers-sunflower |website=Spitzer Space Telescope |publisher=JPL-Caltech |access-date=21 October 2021}}</ref> |
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</gallery> |
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==See also== |
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* ] |
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==References== |
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{{reflist|refs= |
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<ref name=GaiaDR2>{{cite DR2}}</ref> |
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<ref name=Barbon1973>{{citation |
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| title=Observations of five supernovae 1970-71 |
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| last1=Barbon | first1=R. | last2=Ciatti | first2=F. |
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| last3=Rosino | first3=L. | display-authors=1 |
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| journal=Memorie della Società Astronomia Italiana |
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| volume=44 | page=65 | year=1973 |
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| bibcode=1973MmSAI..44...65B | postscript=. }}</ref> |
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<ref name=Deming1973>{{citation |
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| title=The Light Curve of Supernova 1971 I |
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| last1=Deming | first1=Drake | last2=Rust | first2=Bert W. |
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| last3=Olson | first3=Edward C. | display-authors=1 |
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| journal=Publications of the Astronomical Society of the Pacific |
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| volume=85 | issue=505 | page=321 | date=June 1973 |
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| doi=10.1086/129462 | bibcode=1973PASP...85..321D | doi-access=free }}</ref> |
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<ref name=Tikhonov2009>{{citation |
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| title=Stellar content of the interacting galaxies of the M51 system |
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| last1=Tikhonov | first1=N. A. | last2=Galazutdinova | first2=O. A. |
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| last3=Tikhonov | first3=E. N. | display-authors=1 |
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| journal=Astronomy Letters | postscript=. |
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| volume=35 | issue=9 | pages=599–608 | date=September 2009 |
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| doi=10.1134/S1063773709090035 | bibcode=2009AstL...35..599T | s2cid=123044805 }}</ref> |
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<ref name=Battaglia2006>{{citation |
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| title=ion{H}{i} study of the warped spiral galaxy NGC 5055: a disk/dark matter halo offset? |
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| last1=Battaglia | first1=G. | last2=Fraternali | first2=F. |
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| last3=Oosterloo | first3=T. | last4=Sancisi | first4=R. |
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| journal=Astronomy and Astrophysics | display-authors=1 |
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| volume=447 | issue=1 | pages=49–62 | date=February 2006 |
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| doi=10.1051/0004-6361:20053210 | bibcode=2006A&A...447...49B |
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| arxiv=astro-ph/0509382 | s2cid=119353199 | postscript=. }}</ref> |
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<ref name=McQuinn2017>{{citation |
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| title=Accurate Distances to Important Spiral Galaxies: M63, M74, NGC 1291, NGC 4559, NGC 4625, and NGC 5398 |
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| display-authors=1 | last1=McQuinn | first1=Kristen. B. W. |
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| last2=Skillman | first2=Evan D. | last3=Dolphin | first3=Andrew E. |
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| last4=Berg | first4=Danielle | last5=Kennicutt | first5=Robert |
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| journal=The Astronomical Journal |
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| volume=154 | issue=2 | id=51 | pages=13 | date=August 2017 |
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| doi=10.3847/1538-3881/aa7aad | bibcode=2017AJ....154...51M |
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| arxiv=1706.06586 | s2cid=119449804 | postscript=. | doi-access=free }}</ref> |
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<ref name="Bai">{{cite journal |last1=Bai |first1=Yu |last2=Zou |first2=Hu |last3=Liu |first3=JiFeng |last4=Wang |first4=Song |title=An Updated Ultraviolet Catalog of Galex Nearby Galaxies |journal=The Astrophysical Journal Supplement Series |date=September 2015 |volume=220 |issue=1 |page=6 |doi=10.1088/0067-0049/220/1/6 |url=ttpsh://doi.org/10.1088/0067-0049/220/1/6 |access-date=21 October 2021|arxiv=1508.07071 |bibcode=2015ApJS..220....6B |s2cid=118402184 }}</ref> |
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<ref name=Garfinkle1997>{{citation |
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| title=Star-Hopping: Your Visa to Viewing the Universe |
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| first1=Robert A. | last1=Garfinkle | postscript=. |
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| publisher=Cambridge University Press |
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| year=1997 | isbn=978-0521598897 | page=258 |
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| url=https://books.google.com/books?id=40JzBYGREL0C&pg=PA258 }}</ref> |
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<ref name=Ann2015>{{citation |
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| title=A Catalog of Visually Classified Galaxies in the Local (z ~ 0.01) Universe |
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| last1=Ann | first1=H. B. | last2=Seo | first2=Mira |
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| last3=Ha | first3=D. K. | display-authors=1 |
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| journal=The Astrophysical Journal Supplement Series |
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| volume=217 | issue=2 | pages=27–49 | date=2015 |
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| bibcode=2015ApJS..217...27A | arxiv=1502.03545 |
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| doi=10.1088/0067-0049/217/2/27 | s2cid=119253507 | postscript=. }}</ref> |
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<ref name="ned">{{cite web |
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| title=NASA/IPAC Extragalactic Database |
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| title=NASA/IPAC Extragalactic Database |
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| work=Results for NGC 5055 |
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| work=Results for NGC 5055 |
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| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=messier+63&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES |
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| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=messier+63&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES |
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| accessdate=2006-10-10}}</ref> |
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| access-date=2006-10-10}}</ref> |
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| dec = {{DEC|+42|01|45}}<ref name="ned" /> |
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| type = SA(rs)bc<ref name="ned" /> |
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| dist_ly = 27 ]<ref>NASA (2015). . Retrieved Mar. 2, 2017</ref> |
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| z = 484 km/]<ref name="ned" /> |
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| appmag_v = 9.3<ref name="ned" /> |
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| size_v = 12′.6 × 7′.2<ref name="ned" /> |
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| constellation name = ] |
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| names = ]63, NGC 5055, ] 8334, ] 46153<ref name="ned" /> |
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}} |
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<ref name=NASA>{{citation |
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'''Messier 63''' (also known as '''M63''', '''NGC 5055''', or the '''Sunflower Galaxy''') is a ] in the ] ] consisting of a central disc surrounded by many short spiral arm segments. M63 is part of the ], a group of galaxies that also includes ] (the 'Whirlpool Galaxy'). M63 is an ] with a ] nucleus.<ref>{{cite simbad|title=M 63|accessdate=16 November 2015}}</ref> The existence of a ] (SMBH) at the nucleus is uncertain; if it does exist, then the mass is estimated as {{Val|8.5e8|1.9|ul=solar mass}}.<ref name=Graham2008>{{citation |
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| title=Hubble Sees a Galactic Sunflower |
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| publisher=NASA | date=11 September 2015 |
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| editor1-first=Ashley | editor1-last=Morrow |
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| url=https://www.nasa.gov/image-feature/goddard/hubbles-galactic-sunflower |
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| access-date=2018-11-30 | postscript=. }}</ref> |
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<ref name=Graham2008>{{citation |
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| title=Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values |
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| title=Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values |
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| last1=Graham | first1=Alister W. | postscript=. |
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| last1=Graham | first1=Alister W. | postscript=. |
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| journal=Publications of the Astronomical Society of Australia |
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| journal=Publications of the Astronomical Society of Australia |
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| volume=25 | issue=4 | pages=167-175 | date=November 2008 |
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| volume=25 | issue=4 | pages=167–175 | date=November 2008 |
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| doi=10.1071/AS08013 | bibcode=2008PASA...25..167G }}</ref> |
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| doi=10.1071/AS08013 | bibcode=2008PASA...25..167G |arxiv = 0807.2549 | s2cid=89905 }}</ref> |
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<ref name=jonesbook1991>{{citation | postscript=. |
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==History== |
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| first1=K. G. | last1=Jones | date=1991 |
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| title=Messier's Nebulae and Star Clusters |
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| edition= 2nd | publisher=] |
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| location=Cambridge | isbn=978-0-521-37079-0 }}</ref> |
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<ref name=Thornley1996>{{citation |
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M63 was discovered by ] on June 14, 1779.<ref name="jonesbook1991">{{cite book |
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| title=Uncovering Spiral Structure in Flocculent Galaxies |
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| author=K. G. Jones |
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| last1=Thornley | first1=Michele D. |
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| date=1991 |
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| journal=Astrophysical Journal Letters |
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| title=Messier's Nebulae and Star Clusters |
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| volume=469 | page=L45 | date=September 1996 |
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| edition= 2nd |
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| doi=10.1086/310250 | bibcode=1996ApJ...469L..45T |
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| publisher=Cambridge University Press |
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| arxiv=astro-ph/9607041 | s2cid=9003459 | postscript=. }}</ref> |
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| location=Cambridge |
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| isbn=0-521-37079-5 }}</ref> The galaxy was then listed by ] as object 63 in the ]. |
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<ref name=Tully2016>{{citation |
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In the mid-19th century, ] identified spiral structures within the galaxy, making this one of the first galaxies in which such structure was identified.<ref name="jonesbook1991"/> |
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| last1=Tully | first1=R. Brent | last2=Courtois | first2=Hélène M. |
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| last3=Sorce | first3=Jenny G. | display-authors=1 |
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| title=Cosmicflows-3 | journal=The Astronomical Journal |
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| volume=152 | issue=2 | id=50 | pages=21 | date=August 2016 |
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| doi=10.3847/0004-6256/152/2/50 | bibcode=2016AJ....152...50T |
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| arxiv=1605.01765 | s2cid=250737862 | postscript=. | doi-access=free }}</ref> |
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<ref name=Masegosa2011>{{citation |
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In 1971, a supernova with a magnitude of 11.8 appeared in one of the arms of M63. |
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| title=The nature of nuclear Hα emission in LINERs |
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| last1=Masegosa | first1=J. | last2=Márquez | first2=I. |
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| last3=Ramirez | first3=A. | last4=González-Martín | first4=O. |
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| journal=Astronomy & Astrophysics | display-authors=1 |
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| volume=527 | id=A23 | pages=28 | date=March 2011 |
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| doi=10.1051/0004-6361/201015047 | bibcode=2011A&A...527A..23M |
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| arxiv=1011.0865 | s2cid=116978210 | postscript=. }}</ref> |
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}} |
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] (450 and 814 nm).]] |
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].]] |
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==References== |
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{{reflist}} |
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==External links== |
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==External links== |
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{{Sky|13|15|49.3|+|42|01|45|37000000}} |
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{{Sky|13|15|49.3|+|42|01|45|37000000}} |
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{{Portal bar|Astronomy|Stars|Outer space}} |
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{{Messier objects}} |
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{{Messier objects}} |
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{{Ngc55}} |
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{{Ngc55}}{{Stars of Canes Venatici}} |
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{{DEFAULTSORT:Messier 63}} |
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The distance to M63, based upon the luminosity-distance measurement is 29,300,000 light-years (8.99 megaparsecs). The radial velocity relative to the Local Group yields an estimate of 15,200,000 light-years (4.65 megaparsecs). Estimates based on the Tully–Fisher relation range over 16,000,000–34,000,000 light-years (5.0–10.3 megaparsecs). The tip of the red-giant branch technique gives a distance of 28,930,000 ± 950,000 light-years (8.87 ± 0.29 megaparsecs). M63 is part of the M51 Group, a group of galaxies that also includes M51 (the 'Whirlpool Galaxy').