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<ref name="Fernandez2009">{{cite journal | title=The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b | url=http://iopscience.iop.org/article/10.1088/0004-6256/137/6/4911 | last1=Fernandez | first1=Jose M. | last2=Holman | first2=Matthew J. | last3=Winn | first3=Joshua N. | last4=Torres | first4=Guillermo | last5=Shporer | first5=Avi | last6=Mazeh | first6=Tsevi | last7=Esquerdo | first7=Gilbert A. | last8=Everett | first8=Mark E. | display-authors=1 | journal=The Astronomical Journal | volume=137 | issue=6 | pages=4911–4916 | year=2009 | arxiv=0903.2687 | bibcode=2009AJ....137.4911F | doi=10.1088/0004-6256/137/6/4911 }}</ref> | <ref name="Fernandez2009">{{cite journal | title=The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b | url=http://iopscience.iop.org/article/10.1088/0004-6256/137/6/4911 | last1=Fernandez | first1=Jose M. | last2=Holman | first2=Matthew J. | last3=Winn | first3=Joshua N. | last4=Torres | first4=Guillermo | last5=Shporer | first5=Avi | last6=Mazeh | first6=Tsevi | last7=Esquerdo | first7=Gilbert A. | last8=Everett | first8=Mark E. | display-authors=1 | journal=The Astronomical Journal | volume=137 | issue=6 | pages=4911–4916 | year=2009 | arxiv=0903.2687 | bibcode=2009AJ....137.4911F | doi=10.1088/0004-6256/137/6/4911 }}</ref> | ||
<ref name="Gaia2016">{{cite journal | title=Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties | url=https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html | journal=Astronomy and Astrophysics | volume=595 | at=A2 | year=2016 | last1=Brown | first1=A. G. A | last2=Vallenari | first2=A | last3=Prusti | first3=T | last4=De Bruijne | first4=J. H.J | last5=Mignard | first5=F | last6=Drimmel | first6=R | last7=Babusiaux | first7=C | last8=Bailer-Jones | first8=C. A.L | last9=Bastian | first9=U | last10=Biermann | first10=M | last11=Evans | first11=D. W | last12=Eyer | first12=L | last13=Jansen | first13=F | last14=Jordi | first14=C | last15=Katz | first15=D | last16=Klioner | first16=S. A | last17=Lammers | first17=U | last18=Lindegren | first18=L | last19=Luri | first19=X | last20=o'Mullane | first20=W | last21=Panem | first21=C | last22=Pourbaix | first22=D | last23=Randich | first23=S | last24=Sartoretti | first24=P | last25=Siddiqui | first25=H. I | last26=Soubiran | first26=C | last27=Valette | first27=V | last28=Van Leeuwen | first28=F | last29=Walton | first29=N. A | last30=Aerts | first30=C | display-authors=1 | arxiv=1609.04172 | bibcode=2016A&A...595A...2G | doi=10.1051/0004-6361/201629512 }}</ref> | <ref name="Gaia2016">{{cite journal | title=Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties | url=https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html | journal=Astronomy and Astrophysics | volume=595 | at=A2 | year=2016 | last1=Brown | first1=A. G. A | last2=Vallenari | first2=A | last3=Prusti | first3=T | last4=De Bruijne | first4=J. H.J | last5=Mignard | first5=F | last6=Drimmel | first6=R | last7=Babusiaux | first7=C | last8=Bailer-Jones | first8=C. A.L | last9=Bastian | first9=U | last10=Biermann | first10=M | last11=Evans | first11=D. W | last12=Eyer | first12=L | last13=Jansen | first13=F | last14=Jordi | first14=C | last15=Katz | first15=D | last16=Klioner | first16=S. A | last17=Lammers | first17=U | last18=Lindegren | first18=L | last19=Luri | first19=X | last20=o'Mullane | first20=W | last21=Panem | first21=C | last22=Pourbaix | first22=D | last23=Randich | first23=S | last24=Sartoretti | first24=P | last25=Siddiqui | first25=H. I | last26=Soubiran | first26=C | last27=Valette | first27=V | last28=Van Leeuwen | first28=F | last29=Walton | first29=N. A | last30=Aerts | first30=C | display-authors=1 | arxiv=1609.04172 | bibcode=2016A&A...595A...2G | doi=10.1051/0004-6361/201629512 }} {{webarchive|url=https://web.archive.org/web/20161129194737/http://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html |date=2016-11-29 }}</ref> | ||
<ref name="Høg2000">{{cite journal | url=http://articles.adsabs.harvard.edu/full/2000A%26A...355L..27H | title=The Tycho-2 catalogue of the 2.5 million brightest stars | last1=Høg | first1=E. | last2=Fabricius | first2=C. | last3=Makarov | first3=V. V. | last4=Urban | first4=S. | last5=Corbin | first5=T. | last6=Wycoff | first6=G. | last7=Bastian | first7=U. | last8=Schwekendiek | first8=P. | last9=Wicenec | first9=A. | display-authors=1 | journal=Astronomy and Astrophysics | volume=355 | pages=L27–L30 | date=2000 | bibcode=2000A&A...355L..27H | doi=10.1888/0333750888/2862 }} </ref> | <ref name="Høg2000">{{cite journal | url=http://articles.adsabs.harvard.edu/full/2000A%26A...355L..27H | title=The Tycho-2 catalogue of the 2.5 million brightest stars | last1=Høg | first1=E. | last2=Fabricius | first2=C. | last3=Makarov | first3=V. V. | last4=Urban | first4=S. | last5=Corbin | first5=T. | last6=Wycoff | first6=G. | last7=Bastian | first7=U. | last8=Schwekendiek | first8=P. | last9=Wicenec | first9=A. | display-authors=1 | journal=Astronomy and Astrophysics | volume=355 | pages=L27–L30 | date=2000 | bibcode=2000A&A...355L..27H | doi=10.1888/0333750888/2862 }} {{webarchive|url=https://web.archive.org/web/20160304041126/http://vizier.u-strasbg.fr/viz-bin/VizieR-S?TYC%203413-5-1 |date=2016-03-04 }}</ref> | ||
<ref name="Narita2011">{{cite journal | title=XO-2b: a Prograde Planet with a Negligible Eccentricity and an Additional Radial Velocity Variation | url=https://academic.oup.com/pasj/article/63/6/L67/1455472 | last1=Narita | first1=Norio | last2=Hirano | first2=Teruyuki | last3=Sato | first3=Bun’ei | last4=Harakawa | first4=Hiroki | last5=Fukui | first5=Akihiko | last6=Aoki | first6=Wako | last7=Tamura | first7=Motohide | display-authors=1 | journal=Publications of the Astronomical Society of Japan | volume=63 | issue=6 | pages=L67–L71 | year=2011 | arxiv=1110.6136 | bibcode=2011PASJ...63L..67N | doi=10.1093/pasj/63.6.l67}}</ref> | <ref name="Narita2011">{{cite journal | title=XO-2b: a Prograde Planet with a Negligible Eccentricity and an Additional Radial Velocity Variation | url=https://academic.oup.com/pasj/article/63/6/L67/1455472 | last1=Narita | first1=Norio | last2=Hirano | first2=Teruyuki | last3=Sato | first3=Bun’ei | last4=Harakawa | first4=Hiroki | last5=Fukui | first5=Akihiko | last6=Aoki | first6=Wako | last7=Tamura | first7=Motohide | display-authors=1 | journal=Publications of the Astronomical Society of Japan | volume=63 | issue=6 | pages=L67–L71 | year=2011 | arxiv=1110.6136 | bibcode=2011PASJ...63L..67N | doi=10.1093/pasj/63.6.l67}} {{webarchive|url=https://web.archive.org/web/20171231052004/https://academic.oup.com/pasj/article/63/6/L67/1455472 |date=2017-12-31 }}</ref> | ||
<ref name="Roman1987">{{cite journal | title=Identification of a Constellation From a Position | url=http://articles.adsabs.harvard.edu/full/1987PASP...99..695R | last1=Roman | first1=Nancy G. | journal=Publications of the Astronomical Society of the Pacific | volume=99 | issue=617 | pages=695–699 | year=1987 | bibcode=1987PASP...99..695R | doi=10.1086/132034 }} </ref> | <ref name="Roman1987">{{cite journal | title=Identification of a Constellation From a Position | url=http://articles.adsabs.harvard.edu/full/1987PASP...99..695R | last1=Roman | first1=Nancy G. | journal=Publications of the Astronomical Society of the Pacific | volume=99 | issue=617 | pages=695–699 | year=1987 | bibcode=1987PASP...99..695R | doi=10.1086/132034 }} {{webarchive|url=https://web.archive.org/web/20170704034733/http://vizier.u-strasbg.fr/vizier/VizieR/constellations.htx |date=2017-07-04 }}</ref> | ||
<ref name="Simbad XO-2S">{{cite simbad | title=TYC 3413-210-1 |accessdate=2018-01-28}}</ref> | <ref name="Simbad XO-2S">{{cite simbad | title=TYC 3413-210-1 |accessdate=2018-01-28}}</ref> | ||
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<ref name="Simbad XO-2N">{{cite simbad | title=TYC 3413-5-1 |accessdate=2018-01-28}}</ref> | <ref name="Simbad XO-2N">{{cite simbad | title=TYC 3413-5-1 |accessdate=2018-01-28}}</ref> | ||
<ref name="Sing2011">{{cite journal | title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry | url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html | last1=Sing | first1=D. K. | last2=Désert | first2=J.-M. | last3=Fortney | first3=J. J. | last4=Lecavelier Des Etangs | first4=A. | last5=Ballester | first5=G. E. | last6=Cepa | first6=J. | last7=Ehrenreich | first7=D. | last8=López-Morales | first8=M. | last9=Pont | first9=F. | last10=Shabram | first10=M. | last11=Vidal-Madjar | first11=A. | display-authors=1 | journal=Astronomy and Astrophysics | volume=527 | at=A73 | year=2011 | arxiv=1008.4795 | bibcode=2011A&A...527A..73S | doi=10.1051/0004-6361/201015579 }} |
<ref name="Sing2011">{{cite journal | title=Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry | url=https://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html | last1=Sing | first1=D. K. | last2=Désert | first2=J.-M. | last3=Fortney | first3=J. J. | last4=Lecavelier Des Etangs | first4=A. | last5=Ballester | first5=G. E. | last6=Cepa | first6=J. | last7=Ehrenreich | first7=D. | last8=López-Morales | first8=M. | last9=Pont | first9=F. | last10=Shabram | first10=M. | last11=Vidal-Madjar | first11=A. | display-authors=1 | journal=Astronomy and Astrophysics | volume=527 | at=A73 | year=2011 | arxiv=1008.4795 | bibcode=2011A&A...527A..73S | doi=10.1051/0004-6361/201015579 }} | ||
}} {{webarchive|url=https://web.archive.org/web/20170219100343/http://www.aanda.org/articles/aa/full_html/2011/03/aa15579-10/aa15579-10.html |date=2017-02-19 }}</ref> | |||
}} | |||
==External links== | ==External links== |
Revision as of 20:17, 29 January 2018
Observation data Epoch 2000 Equinox 2000 | |
---|---|
Constellation | Lynx |
XO-2S | |
Right ascension | 07 48 07.4814 |
Declination | +50° 13′ 03.254″ |
Apparent magnitude (V) | 11.12±0.03 |
XO-2N | |
Right ascension | 07 48 06.468 |
Declination | +50° 13′ 32.96″ |
Apparent magnitude (V) | 11.18±0.03 |
Characteristics | |
Spectral type | K0V + K0V |
Astrometry | |
Proper motion (μ) | RA: -34.7 ± 2.6 mas/yr Dec.: -153.6 ± 2.4 mas/yr |
Parallax (π) | 6.68 ± 0.23 mas |
Distance | 490 ± 20 ly (150 ± 5 pc) |
Details | |
XO-2S | |
Mass | 0.982 ± 0.034 M☉ |
Radius | 1.02 R☉ |
Temperature | 5399 ± 55 K |
Metallicity | 0.39 ± 0.05 dex |
Age | 7.1 ± −2.9 Gyr |
XO-2N | |
Mass | 0.971 ± 0.034 M☉ |
Radius | 0.976 −0.016 R☉ |
Temperature | 5340 ± 32 K |
Metallicity | 0.44 ± 0.02 dex |
Age | 6.3 ± 2.4 Gyr |
Other designations | |
XO-2S: LSPM J0748+5013S, TYC 3413-210-1, GSC 03413-00210, 2MASS J07480748+5013032 | |
XO-2N: LSPM J0748+5013N, TYC 3413-5-1, GSC 03413-00005, 2MASS J07480647+5013328 | |
Database references | |
SIMBAD | XO-2S |
XO-2N |
XO-2 Is a binary star. It consists of two components: XO-2S (Also known as XO-2A) and XO-2N (Also known as XO-2B).
This system is located approximately 490 light-years away from Earth in the Lynx constellation. Both of these stars are slightly cooler than the Sun and are nearly identical to each other. The system has a magnitude of 11 and cannot be seen with the naked eye but is visible through a small telescope. These stars are also notable for their large proper motions.
XO-2N and XO-2S have a separation of approximately 4,600 AU.
Planetary systems
One known exoplanet, XO-2Nb (or rarely XO-2Bb), which is classified as a hot Jupiter, was discovered by the XO Telescope using the transit method orbiting XO-2N (XO-2B) in 2007.
Two planets were reported to orbit around XO-2S in 2014 using radial velocity method. One of them is Jupiter-mass and another has a mass comparable to Saturn.
Both stars also show RV-trends, which may indicate the presence of additional long-periodic jovians or brown dwarfs around each of them.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥ 0.259 ± 0.014 MJ | 0.1344 ±0.0025 | 18.157 ± 0.034 | 0.18 ± 0.035 | — | — |
c | ≥ 1.37 ± 0.053 MJ | 0.4756 ±0.0087 | 120.8 ± 0.034 | 0.1528 ± 0.01 | — | — |
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.62 ± 0.02 MJ | 0.0369 ±0.002 | 2.61586178 ± 0.00000075 | 0.045 ± 0.024 | 88.7 ± 1.3° | 0.973 ± 0.03 RJ |
See also
References
{{Reflist|refs=
External links
- NASA PlanetQuest: Planet race heats up: 1 month, 32 discoveries
- "XO-2". Exoplanets. Retrieved 2009-04-28.
This main-sequence-star-related article is a stub. You can help Misplaced Pages by expanding it. |
- ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form Archived 2017-07-04 at the Wayback Machine
- ^ Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Archived 2016-11-29 at the Wayback MachineGaia Data Release 1 catalog entry
- ^ Burke, Christopher J.; et al. (2007). "XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary". The Astrophysical Journal. 671 (2): 2115–2128. arXiv:0705.0003. Bibcode:2007ApJ...671.2115B. doi:10.1086/523087.
- ^ Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 – L30. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. Vizier catalog entry Archived 2016-03-04 at the Wayback Machine
- ^ Desidera, S.; et al. (2014). "The GAPS programme with HARPS-N at TNG. IV. A planetary system around XO-2S". Astronomy and Astrophysics. 567 (6). L6. arXiv:1407.0251. Bibcode:2014A&A...567L...6D. doi:10.1051/0004-6361/201424339.
- ^ Fernandez, Jose M.; et al. (2009). "The Transit Light Curve Project. XII. Six Transits of the Exoplanet XO-2b". The Astronomical Journal. 137 (6): 4911–4916. arXiv:0903.2687. Bibcode:2009AJ....137.4911F. doi:10.1088/0004-6256/137/6/4911.
- ^ "TYC 3413-210-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-28.
- ^ "TYC 3413-5-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-01-28.
- ^ Narita, Norio; et al. (2011). "XO-2b: a Prograde Planet with a Negligible Eccentricity and an Additional Radial Velocity Variation". Publications of the Astronomical Society of Japan. 63 (6): L67 – L71. arXiv:1110.6136. Bibcode:2011PASJ...63L..67N. doi:10.1093/pasj/63.6.l67. Archived 2017-12-31 at the Wayback Machine
- ^ Sing, D. K.; et al. (2011). "Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: detection of potassium in XO-2b from narrowband spectrophotometry". Astronomy and Astrophysics. 527. A73. arXiv:1008.4795. Bibcode:2011A&A...527A..73S. doi:10.1051/0004-6361/201015579. }} Archived 2017-02-19 at the Wayback Machine