{{Short description|Star in the constellation Pavo}} {{Starbox begin | name = ε Pavonis }} {{Starbox image |image= {{Location mark |image=Pavo constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=Epsilon Pavonis |x=434|y=504 }} |caption=Location of ε Pavonis (circled) }} {{Starbox observe | epoch = J2000 | constell = Pavo | ra = {{RA|20|00|35.55558}}<ref name=vanLeeuwen2007>{{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | last1=Van Leeuwen | first1=F. | s2cid=18759600 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2098495 Vizier catalog entry]</ref> | dec = {{DEC|-72|54|37.8198}}<ref name=vanLeeuwen2007/> | appmag_v = 3.97<ref name=XHIP>{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=98495 Vizier catalog entry]</ref> }} {{Starbox character | class = A0 Va<ref name=XHIP/> | b-v = −0.03<ref name=XHIP/> | u-b = −0.05<ref name=MermiliodUBV>{{cite journal | bibcode=2006yCat.2168....0M | title=VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991) | journal=VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie | volume=2168 | last1=Mermilliod | first1=J. C. | year=2006 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=II/168/ubvmeans&LID=%2B100188228 Vizier catalog entry]</ref> }} {{Starbox astrometry | radial_v = {{Val|−6.7|0.7}}<ref name=Gontcharov2006>{{Cite journal | doi = 10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}</ref> | prop_mo_ra = +81.78<ref name=vanLeeuwen2007/> | prop_mo_dec = −132.16<ref name=vanLeeuwen2007/> | parallax = 31.04 | p_error = 0.17 | parallax_footnote = <ref name=vanLeeuwen2007/> | absmag_v = 1.43<ref name=XHIP/> }} {{Starbox detail | mass = 2.2<ref name=Tetzlaff2011>{{cite journal | bibcode=2011MNRAS.410..190T | doi=10.1111/j.1365-2966.2010.17434.x | arxiv=1007.4883 | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | pages=190–200 | year=2011 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | issue=1 | doi-access=free | s2cid=118629873 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/MNRAS/410/190/table1&HIP=98495 Vizier catalog entry]</ref> | temperature = 10,440<ref name=David2015>{{cite journal | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | s2cid=33401607 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/ApJ/804/146/table5&HIP=98495 Vizier catalog entry]</ref> | radius = 1.74<ref name=Gerbaldi1999>{{citation | display-authors=1 | last1=Gerbaldi | first1=M. | last2=Faraggiana | first2=R. | last3=Burnage | first3=R. | last4=Delmas | first4=F. | last5=Gómez | first5=A. E. | last6=Grenier | first6=S. | title=Search for reference A0 dwarf stars: Masses and luminosities revisited with HIPPARCOS parallaxes | journal=Astronomy and Astrophysics Supplement | postscript=. | volume=137 | issue=2 | pages=273–292 |date=June 1999 | doi=10.1051/aas:1999248 | bibcode=1999A&AS..137..273G | doi-access=free }}</ref> | gravity = {{Val|4.32|0.02}}<ref name=Gerbaldi1999/> | age_myr = 27<ref name=Gerbaldi1999/> | luminosity = 32<ref name=Zorec2012>{{cite journal | arxiv=1201.2052 | bibcode=2012A&A...537A.120Z | doi=10.1051/0004-6361/201117691 | year = 2012 | title = Rotational velocities of A-type stars | journal = Astronomy & Astrophysics | volume = 537 | pages = A120 | last1 = Zorec | first1 = J. | last2 = Royer | first2 = F. | s2cid=55586789 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/537/A120/table1&HD=188228 Vizier catalog entry]</ref> | rotational_velocity = 85<ref name=Zorec2012/> }} {{Starbox catalog | names = {{odlist | B=ε Pav | CPD=−73°2086 | FK5=748 | HD=188228 | HIP=98495 | HR=7590 | SAO=257757 | GC=27631 }} }} {{Starbox reference | Simbad = Epsilon+Pavonis }} {{Starbox end}}
'''Epsilon Pavonis''' is a single,<ref name=Eggleton2008>{{cite journal | title=A catalogue of multiplicity among bright stellar systems | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869 | date=2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}</ref> white-hued star in the constellation Pavo. Its name is a Bayer designation that is Latinized from '''ε Pavonis''', and abbreviated Epsilon Pav or ε Pav. It can be viewed with the naked eye, having an apparent visual magnitude of 3.97.<ref name=XHIP/> The annual parallax shift of 31.04 mas<ref name=vanLeeuwen2007/> provides a distance estimate of 105 light years from the Sun.
With a stellar classification of A0 Va,<ref name=XHIP/> Epsilon Pavonis is an ordinary A-type main-sequence star that is generating energy through hydrogen fusion at its core. It is just 27 million years old<ref name=Gerbaldi1999/> with a projected rotational velocity of 85 km/s.<ref name=Zorec2012/> The star has 2.2 times the mass of the Sun<ref name=Tetzlaff2011/> and 1.74 times the Sun's radius.<ref name=Gerbaldi1999/> It is radiating 32 times the Sun's luminosity from its photosphere<ref name=Zorec2012/> at an effective temperature of 10,440 K.<ref name=David2015/>
This star is a member of the proposed Argus Association, a young moving group of more than 60 stars associated with the IC 2391 cluster.<ref name=Zuckerman2011>{{cite journal | title=The Tucana/Horologium, Columba, AB Doradus, and Argus Associations: New Members and Dusty Debris Disks | display-authors=1 | last1=Zuckerman | first1=B. | last2=Rhee | first2=Joseph H. | last3=Song | first3=Inseok | last4=Bessell | first4=M. S. | journal=The Astrophysical Journal | volume=732 | issue=2 | id=61 | pages=19 | date=May 2011 | doi=10.1088/0004-637X/732/2/61 | bibcode=2011ApJ...732...61Z | arxiv=1104.0284 | s2cid=62797470 }}</ref> Epsilon Pavonis is moving closer to the Sun with a radial velocity of −6.7 km/s.<ref name=Gontcharov2006/>
==References== {{reflist}}
{{Stars of Pavo}}
Category:A-type main-sequence stars Category:Pavo (constellation) Pavonis, Epsilon Category:Durchmusterung objects 188228 098495 7590