Omega2 Tauri
{{Short description|Star in the constellation Taurus}}
{{DISPLAYTITLE:Omega2 Tauri}}
{{other stars by Bayer designation|Omega Tauri{{!}}ω Tauri}}
{{Starbox begin
| name = Omega2 Tauri
}}
{{Starbox observe
| epoch = J2000.0
| constell = Taurus
| dec = {{DEC|+20|34|42.9340}}
}}
{{Starbox character
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|+15.0|0.6}}
| parallax = 34.55
| p_error = 0.38
}}
{{Starbox detail
| source =
| radius = {{Val|1.514|0.044}}
| temperature = {{Val|7541|137|fmt=commas}}
| gravity =
| metal_fe =
}}
{{Starbox catalog
| names = {{odlist | B=ω2 Tau | F=50 Tau | BD=+20°724 | FK5= | HD=27045 | HIP=19990 | HR=1329 | SAO=76532 }}
}}
{{Starbox reference
| Simbad = ome02+Tau
}}
{{Starbox end}}
Omega2 Tauri is a solitary, white hued star in the zodiac constellation of Taurus. It has an apparent visual magnitude of +4.9, which is bright enough to be seen with the naked eye at night. The distance to this system, as determined using an annual parallax shift of 34.55 mas as seen from the Earth, is about 94 light years. The position of this star near the ecliptic means it is subject to lunar occultation.
This is a young Am star with an age of around 100 million years and a stellar classification of A3m. It displays an infrared excess emission, indicating the presence of an orbiting debris disk with a mean temperature of 99 K. This star is a probable member of the Octans Near association, a nearby moving group of stars that share a common motion through space.
References
{{reflist|refs=
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| last1=van Leeuwen | first1=F.
| journal=Astronomy and Astrophysics
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| arxiv=0708.1752 | bibcode=2007A&A...474..653V
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| title=Effective temperature scale and bolometric corrections from 2MASS photometry
| journal=Astronomy and Astrophysics | postscript=.
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| bibcode=2006A&A...450..735M | doi=10.1051/0004-6361:20054021 |arxiv = astro-ph/0601049 | s2cid=15278668 }}
| display-authors=1 | last1=McDonald | first1=I.
| last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L.
| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars
| journal=Monthly Notices of the Royal Astronomical Society
| volume=427 | issue=1 | pages=343–57 | date=2012
| bibcode=2012MNRAS.427..343M | arxiv=1208.2037
| doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | s2cid=118665352 }}
| title=The Tycho-2 catalogue of the 2.5 million brightest stars
| journal=Astronomy and Astrophysics
| display-authors=1 | last1=Høg | first1=E.
| last2=Fabricius | first2=C. | last3=Makarov | first3=V. V.
| last4=Urban | first4=S. | last5=Corbin | first5=T.
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| volume=355 | pages=L27 | year=2000
| bibcode=2000A&A...355L..27H | postscript=. }}
| title=Young Stars near Earth: The Octans-Near Association and Castor Moving Group
| last1=Zuckerman | first1=B. | last2=Vican | first2=Laura
| last3=Song | first3=Inseok | last4=Schneider | first4=Adam
| journal=The Astrophysical Journal | display-authors=1
| volume=778 | issue=1 | id=5 | pages=12 | date=November 2013
| doi=10.1088/0004-637X/778/1/5 | bibcode=2013ApJ...778....5Z
| arxiv=1309.2318 | s2cid=118446756 | postscript=. }}
| last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.
| title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project
| journal=Astronomy & Astrophysics
| volume=546 | id=A61 | pages=14 | date=October 2012
| doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D
| arxiv=1208.3048 | s2cid=59451347 | postscript=. }}
| display-authors=1 | last1=Su | first1=K. Y. L.
| last2=Rieke | first2=G. H. | last3=Stansberry | first3=J. A.
| last4=Bryden | first4=G. | last5=Stapelfeldt | first5=K. R.
| last6=Trilling | first6=D. E. | last7=Muzerolle | first7=J.
| last8=Beichman | first8=C. A. | last9=Moro-Martin | first9=A.
| title=Debris Disk Evolution around A Stars
| journal=The Astrophysical Journal
| volume=653 | issue=1 | pages=675–689 | date=December 2006
| doi=10.1086/508649 | bibcode=2006ApJ...653..675S
| arxiv=astro-ph/0608563 | s2cid=14116473 | postscript=. }}
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
| title=A catalogue of multiplicity among bright stellar systems
| journal=Monthly Notices of the Royal Astronomical Society
| volume=389 | issue=2 | pages=869–879 | date=September 2008
| bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x
| doi-access=free | arxiv=0806.2878 | s2cid=14878976 | postscript=. }}
| display-authors=1 | last1=Tetzlaff | first1=N.
| last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M.
| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun
| journal=Monthly Notices of the Royal Astronomical Society
| volume=410 | issue=1 | pages=190–200 | date=January 2011
| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T
| arxiv=1007.4883 | s2cid=118629873 | postscript=. }}
| title=XHIP: An extended hipparcos compilation
| last1=Anderson | first1=E. | last2=Francis | first2=Ch.
| journal=Astronomy Letters
| volume=38 | issue=5 | pages=331 | year=2012
| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015
| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}
| title=ome02 Tau | access-date=2017-06-30 }}
| title=Identification List of Spectroscopic and Eclipsing Binaries Subject to Occultations by the Moon
| last=Herr | first=Richard B.
| journal=Publications of the Astronomical Society of the Pacific
| volume=81 | issue=479 | page=105 | date=April 1969
| doi=10.1086/128748 | bibcode=1969PASP...81..105H }}
}}
{{Stars of Taurus|state=collapsed}}
{{DEFAULTSORT:Omega2 Tauri}}