Zeta Delphini: Difference between revisions

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			{{short description\|Star in the constellation Delphinus}}
	{{starbox short
		⚫	{{Starbox begin\|name=ζ Delphini}}
⚫	\|constell= ]
			{{Starbox image
⚫	\|name= ~~Zeta~~ Delphini
			\| image=
	\|type= A3V <ref name=SIMBAD> SIMBAD, (accessed 9 September 2012) </ref>
			{{Location mark
⚫	\|ra= {{RA\|20\|35\|18.~~53563~~}} <ref name=~~SIMBAD~~/>
			\|image=Delphinus constellation map.svg\|alt=\|float=center\|width=260
	\|dec= {{DEC\|+14\|40\|27.1675}} <ref name=SIMBAD/>
			\|label=\|position=right
			\|mark=Red circle.svg\|mark_width=10\|mark_link=ζ Del
			\|x=439\|y=374
	}}		}}
			\|caption=Location of ζ Delphini (circled)
	'''Zeta Delphini''' ('''ζ Del''') is a ] in the ] ]. Its] is 4.66.
			}}
			{{Starbox observe
			\|epoch=]
		⚫	\|constell=]
			\|ra={{RA\|20\|35\|18.53563}}<ref name=HIP>{{cite journal\|title=Validation of the new Hipparcos reduction\|url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL\|author1=van Leeuwen, F.\|display-authors=etal\|journal=Astronomy and Astrophysics\|volume=474\|issue=2\|pages=653–664\|date=2007\|arxiv=0708.1752\|bibcode=2007A&A...474..653V\|doi=10.1051/0004-6361:20078357\|s2cid = 18759600}}</ref>
		⚫	\|dec={{DEC\|+14\|40\|27.1675}}<ref name=HIP/>
			\|appmag_v=+4.647<ref name=TYC2>{{cite journal\|title=The Tycho-2 catalogue of the 2.5 million brightest stars\|author1=Høg, E.\|display-authors=etal\|date=2000\|journal=Astronomy and Astrophysics\|volume=355\|pages=L27–L30\|bibcode=2000A&A...355L..27H}}</ref>
			}}
			{{Starbox character
			\|class=A3Va / L5<ref name=vast/>
			\|b-v=+0.105<ref name=EgUBV>{{cite journal\|author1=Mermilliod, J.-C.\|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)\|journal=Catalogue of Eggen's UBV Data\|url=http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1986EgUBV........0M&db_key=AST&nosetcookie=1\|date=1986\|bibcode= 1986EgUBV........0M }}</ref>
			\|u-b=+0.14<ref name=EgUBV/>
			\|variable=
			}}
			{{Starbox astrometry
			\|radial_v=−25 ± 2<ref name=GCRV>{{cite journal\|title=General catalogue of stellar radial velocities\|journal=Washington\|author=Wilson, Ralph Elmer\|date=1953\|bibcode=1953GCRV..C......0W}}</ref>
			\|prop_mo_ra=45.52<ref name=HIP/>
			\|prop_mo_dec=11.74<ref name=HIP/>
			\|parallax=14.82
			\|p_error=0.23
			\|parallax_footnote=<ref name=HIP/>
			\|absmag_bol=0.523 / 14.59<ref name=vast/>
			}}
			{{Starbox detail
			\|source=<ref name=vast>{{cite journal\|bibcode=2014MNRAS.445.3694D\|arxiv=1410.0005\|title=The VAST Survey - IV. A wide brown dwarf companion to the A3V star ζ Delphini\|journal=Monthly Notices of the Royal Astronomical Society\|volume=445\|issue=4\|pages=3694\|last1=De Rosa\|first1=R. J.\|last2=Patience\|first2=J.\|last3=Ward-Duong\|first3=K.\|last4=Vigan\|first4=A.\|last5=Marois\|first5=C.\|last6=Song\|first6=I.\|last7=MacIntosh\|first7=B.\|last8=Graham\|first8=J. R.\|last9=Doyon\|first9=R.\|last10=Bessell\|first10=M. S.\|last11=Lai\|first11=O.\|last12=McCarthy\|first12=D. W.\|last13=Kulesa\|first13=C.\|year=2014\|doi=10.1093/mnras/stu2018\|doi-access=free \|s2cid=34066734}}</ref>
			\|component1=ζ Del A
			\|mass=2.5 ± 0.2
			\|luminosity=48.63 ± 1.66
			\|temperature=8336
			\|gravity=3.72
			\|metal_fe=−0.05
			\|age_myr=525 ± 125
			\|component2=ζ Del B
			\|mass_mj2=55 ± 10
			\|luminosity2=0.00012 ± 0.00001
			\|temperature2={{val\|1550\|+250\|-100}}
			\|gravity2={{val\|5.0\|+0.5\|-1.0}}
			\|age_myr2=525 ± 125
			}}
			{{Starbox catalog
			\|names= ], ]+14°4353, ] 196180, ] 101589, ] 7871, ] 106274<ref name=SIMBAD>{{cite simbad\|title=zet+Del\|access-date=5 March 2017}}</ref>
			}}
			{{Starbox reference
			\|Simbad=zet+Del\|sn=ζ Del
			\|Simbad2=zet+Del+B\|sn2=ζ Del B
			}}
			{{Starbox end}}
			'''Zeta Delphini''' ('''ζ Delphini''') is a ] in the ] of ]. With an apparent magnitude of about 4.6,<ref name=TYC2/> it is faintly visible to the naked eye. ] measurements of the system made by the ] ] put it at a distance of about 220 ]s, or 67 ]s.<ref name=HIP/>

			Zeta Delphini has a spectral type of A3V, implying it is an ].<ref name=vast/> These types of stars are bluish-white colored, and have ]s between 7100 and 11500 ]:<ref>{{cite journal\|title=The physical properties of normal A stars\|author=Adelman, Saul J.\|journal=Proceedings of the International Astronomical Union\|volume=2004\|pages=1–11\|date=2004\|bibcode=2004IAUS..224....1A\|doi=10.1017/S1743921304004314\|doi-access=free}}</ref> Zeta Delphini has a temperature of 8336 K.<ref name=vast/> Its age is estimated to be around 500 million years, considerably younger than the Sun.<ref name=vast/>

			In 2014, the discovery of a ] around Zeta Delphini was announced. Zeta Delphini B is a brown dwarf with a ] of L5 (but may be from L3 to L7), and has a mass of about 55 ]s. At over 13 ]s away, this brown dwarf is separated at least 910 ] from Zeta Delphini.<ref name=vast/>

	==References==		==References==
	{{reflist}}		{{reflist}}

			==External links==
			*{{cite journal\|bibcode=2012A&A...537A.120Z\|title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities\|journal=Astronomy & Astrophysics\|volume=537\|pages=A120\|last1=Zorec\|first1=J.\|last2=Royer\|first2=F.\|year=2012\|doi=10.1051/0004-6361/201117691\|arxiv = 1201.2052 \|s2cid=55586789}}

	{{Stars of Delphinus}}		{{Stars of Delphinus}}

			{{DEFAULTSORT:Zeta Delphini}}
	]
	]		]
			]
	]		]
			]

			]
	{{Star-stub}}
			]
			]
			]
			]
			]

Latest revision as of 09:57, 22 August 2024

Star in the constellation Delphinus

ζ Delphini
Observation data Epoch J2000 Equinox J2000
Location of ζ Delphini (circled)
Constellation	Delphinus
Right ascension	20 35 18.53563
Declination	+14° 40′ 27.1675″
Apparent magnitude (V)	+4.647
Characteristics
Spectral type	A3Va / L5
U−B color index	+0.14
B−V color index	+0.105
Astrometry

Radial velocity (R_v)	−25 ± 2 km/s
Proper motion (μ)	RA: 45.52 mas/yr Dec.: 11.74 mas/yr
Parallax (π)	14.82 ± 0.23 mas
Distance	220 ± 3 ly (67 ± 1 pc)
Absolute bolometric magnitude (M_bol)	0.523 / 14.59

Details
ζ Del A
Mass	2.5 ± 0.2 `M`_☉
Luminosity	48.63 ± 1.66 `L`_☉
Surface gravity (log g)	3.72 cgs
Temperature	8336 K
Metallicity	−0.05 dex
Age	525 ± 125 Myr
ζ Del B
Mass	55 ± 10 M_Jup
Luminosity	0.00012 ± 0.00001 `L`_☉
Surface gravity (log g)	5.0+0.5 −1.0 cgs
Temperature	1550+250 −100 K
Age	525 ± 125 Myr
Other designations
4 Delphini, BD+14°4353, HD 196180, HIP 101589, HR 7871, SAO 106274
Database references
SIMBAD	ζ Del
	ζ Del B

Zeta Delphini (ζ Delphini) is a star in the constellation of Delphinus. With an apparent magnitude of about 4.6, it is faintly visible to the naked eye. Parallax measurements of the system made by the Hipparcos spacecraft put it at a distance of about 220 light-years, or 67 parsecs.

Zeta Delphini has a spectral type of A3V, implying it is an A-type main-sequence star. These types of stars are bluish-white colored, and have effective temperatures between 7100 and 11500 K: Zeta Delphini has a temperature of 8336 K. Its age is estimated to be around 500 million years, considerably younger than the Sun.

In 2014, the discovery of a brown dwarf around Zeta Delphini was announced. Zeta Delphini B is a brown dwarf with a spectral type of L5 (but may be from L3 to L7), and has a mass of about 55 Jupiters. At over 13 arcseconds away, this brown dwarf is separated at least 910 AU from Zeta Delphini.

References

^ van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ 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.
^ De Rosa, R. J.; Patience, J.; Ward-Duong, K.; Vigan, A.; Marois, C.; Song, I.; MacIntosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Lai, O.; McCarthy, D. W.; Kulesa, C. (2014). "The VAST Survey - IV. A wide brown dwarf companion to the A3V star ζ Delphini". Monthly Notices of the Royal Astronomical Society. 445 (4): 3694. arXiv:1410.0005. Bibcode:2014MNRAS.445.3694D. doi:10.1093/mnras/stu2018. S2CID 34066734.
^ Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W.
"zet+Del". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 March 2017.
Adelman, Saul J. (2004). "The physical properties of normal A stars". Proceedings of the International Astronomical Union. 2004: 1–11. Bibcode:2004IAUS..224....1A. doi:10.1017/S1743921304004314.

External links

Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. S2CID 55586789.

Constellation of Delphinus

Stars

Bayer	α (Sualocin) β (Rotanev) γ γ δ ε (Aldulfin) ζ η θ ι κ ρ Aql (Tso Ke)
Flamsteed	1 10 13 14 15 16 17 18 (Musica)
Variable	EU HR HU V339 QV Sge
HR	7771 7774 7778 7793 7816 7824 7839 7899 7907 7975 8010 8044
HD	195019
Other	HAT-P-23 (Moriah) WASP-2 WISE J2030+0749 WISE 2056+1459

Exoplanets	18 Delphini b HD 195019 b HD 196885 Ab WASP-2b TOI-6883 b

Star clusters	Laevens 3 NGC 6934 NGC 7006

Nebulae	NGC 6905

Galaxies

NGC	7003 7025 7028
Other	ZW II 96