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{{Starbox begin
{{Starbox begin
| name = Pi<sup>1</sup> Pegasi
| name = Tau Pegasi
}}
{{Starbox image
|image=
{{Location mark
|image=Pegasus constellation map.svg|alt=|float=center|width=280
|label=|position=right
|mark=Red circle.svg|mark_width=10|mark_link=Tau Pegasi
|x=334|y=370
}}
|caption=Location of τ Pegasi (circled)
}}
}}
{{Starbox observe
{{Starbox observe
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| ra = {{RA|23|20|38.24188}}<ref name=aaa474_2_653/>
| ra = {{RA|23|20|38.24188}}<ref name=aaa474_2_653/>
| dec = {{DEC|+23|44|25.2098}}<ref name=aaa474_2_653/>
| dec = {{DEC|+23|44|25.2098}}<ref name=aaa474_2_653/>
| appmag_v = +4.58<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. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=115250 Vizier catalog entry]</ref>
| appmag_v = +4.59<ref name=SIMBAD>SIMBAD, [http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Tau+Pegasi&submit=SIMBAD+search Tau Pegasi] (accessed 16 March 2016)</ref>
}}
}}
{{Starbox character
{{Starbox character
| class = A5 Vp<ref name=Hoffleit1991>{{cite journal | bibcode=1995yCat.5050....0H | title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) | journal=VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H | volume=5050 | author1=Hoffleit | first1=D. | last2=Warren | first2=W. H. | year=1995 }}</ref>
⚫
| class = A5 Vp<ref name=SIMBAD/>}}
| b-v = +0.17<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 | author1=Mermilliod | first1=J. C. | year=2006 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=II/168/ubvmeans&LID=%2B100220061 Vizier catalog entry]</ref>
| u-b = +0.13<ref name=MermiliodUBV/>
| variable = [[Delta Scuti variable|δ Sct]]<ref name=gcvs>{{cite journal | bibcode=2009yCat....1.2025S |title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref>
}}
{{Starbox astrometry
{{Starbox astrometry
| radial_v = +15.20 ± 1.6<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| year=2006| last1=Gontcharov| first1=G. A.}}</ref>
| radial_v = +15.20 ± 1.6
| prop_mo_ra = 29.45 ± 0.33<ref name=aaa474_2_653/>
| prop_mo_ra = 29.45 ± 0.33<ref name=aaa474_2_653/>
| prop_mo_dec = –9.53 ± 0.27<ref name=aaa474_2_653/>
| prop_mo_dec = –9.53 ± 0.27<ref name=aaa474_2_653/>
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| p_error = 0.40
| p_error = 0.40
| parallax_footnote = <ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 }}</ref>
| parallax_footnote = <ref name=aaa474_2_653>{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 |arxiv = 0708.1752 }}</ref>
| absmag_v =
| absmag_v = 1.10<ref name=XHIP/>
}}
}}
<!-- {{Starbox detail
{{Starbox detail
| mass = 2.14<ref name=Zorec2012>{{cite journal | arxiv=1201.2052 | bibcode=2012A&A...537A.120Z | doi=10.1051/0004-6361/201117691 | title=Rotational velocities of A-type stars | journal=Astronomy & Astrophysics | volume=537 | pages=A120 | year=2012 | last1=Zorec | first1=J. | last2=Royer | first2=F. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/537/A120/table1&HD=220061 Vizier catalog entry]</ref>
| mass =
| radius = 2.8<ref name=AllendePrieto>{{cite journal | bibcode=1999A&A...352..555A | arxiv=astro-ph/9911002 | title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures | journal=Astronomy and Astrophysics | volume=352 | pages=555 | author1=Allende Prieto | first1=C. | last2=Lambert | first2=D. L. | year=1999 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/352/555/table1&Name=HIP115250 Vizier catalog entry]</ref>
| radius =
| temperature = 7,709<ref name=Zorec2012/>
| metal_fe =
| luminosity = 32<ref name=Zorec2012/>
| gravity =
⚫
| rotational_velocity = 149<ref name=Zorec2012/>
| age_myr =
| gravity = 3.88<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. }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/ApJ/804/146/table5&HIP=115250 Vizier catalog entry]</ref>
| luminosity =
⚫
| metal_fe = -0.28<ref name=XHIP/>
| temperature =
⚫
| rotational_velocity =
}}
}}
-->
{{Starbox catalog
{{Starbox catalog
| names = 62&nbsp;Peg, [[Bonner Durchmusterung|BD]]+22 4810, [[Henry Draper Catalogue|HD]]&nbsp;220061, [[Hipparcos Catalogue|HIP]]&nbsp;115250, [[Star catalogue#BS, BSC, HR|HR]]&nbsp;8880, [[Star catalogue#SAO|SAO]]&nbsp;91186.<ref name=SIMBAD/>
| names = [[Durchmusterung|BD]]+22°4810, [[Flamsteed designation|62]]&nbsp;Pegasi, [[Fifth Fundamental Catalogue|FK5]]&nbsp;880, [[Boss General catalogue|GC]]&nbsp;32503, [[Hipparcos catalogue|HIP]]&nbsp;115250, [[Harvard Revised catalogue|HR]]&nbsp;8880, [[Henry Draper Catalogue|HD]]&nbsp;220061, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;91186
}}
{{Starbox reference
| Simbad = Tau+Pegasi
}}
}}
{{Starbox end}}
{{Starbox end}}


'''Tau Pegasi''' (τ Peg, τ Pegasi) is a 4.6 [[apparent magnitude|magnitude]] star in the [[constellation]] [[Pegasus (constellation)|Pegasus]]. The star has also the traditional names '''Salm''',<ref>{{cite book |last=Allen |first=Richard Hinckley |title=Star-names and their meanings |publisher=New York, Leipzig [etc.] G.E. Stechert |date=1899 |pages=329 |url=https://archive.org/details/starnamesandthe00allegoog}}</ref> '''Kerb''' (or ''El Khereb'') and '''Markab''', a name shared with [[Alpha Pegasi|α Pegasi]], [[k Puppis]] and [[Kappa Velorum|κ Velorum]].<ref name="kostjuk">HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)</ref> τ Pegasi belongs to the [[spectral classification|spectral class]] A5 Vp,<ref name=SIMBAD/> making it an [[A-type main sequence star]].
'''Tau Pegasi''' (τ Peg, τ Pegasi) is a 4.6 [[apparent magnitude|magnitude]] star in the [[constellation]] [[Pegasus (constellation)|Pegasus]]. The star has also the traditional names '''Salm''',<ref>{{cite book |last=Allen |first=Richard Hinckley |title=Star-names and their meanings |publisher=New York, Leipzig [etc.] G.E. Stechert |date=1899 |pages=329 |url=https://archive.org/details/starnamesandthe00allegoog}}</ref> '''Kerb''' (or ''El Khereb'') and '''Markab''', a name shared with [[Alpha Pegasi|α Pegasi]], [[k Puppis]] and [[Kappa Velorum|κ Velorum]].<ref name="kostjuk">HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)</ref> τ Pegasi belongs to the [[spectral classification|spectral class]] A5 Vp,<ref name=Hoffleit1991/> making it an [[A-type main sequence star]].


This is a [[Delta Scuti variable]] star with a pulsation period of 0.94 hours. It is rotating rapidly with a [[projected rotational velocity]] of 150&nbsp;km s<sup>−1</sup>. Tau Pegasi is radiating nearly 30 times the luminosity of the Sun from its outer atmosphere at an [[effective temperature]] of 7,762&nbsp;K.<ref name=mnras309_1_221/>
This is a [[Delta Scuti variable]] star with a pulsation period of 0.94 hours. It is rotating rapidly with a [[projected rotational velocity]] of 150&nbsp;km s<sup>−1</sup>. Tau Pegasi is radiating nearly 30 times the luminosity of the Sun from its outer atmosphere at an [[effective temperature]] of 7,762&nbsp;K.<ref name=mnras309_1_221/>
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[[Category:Flamsteed objects|Pegasi, 62]]
[[Category:Flamsteed objects|Pegasi, 62]]
[[Category:Hipparcos objects|115250]]
[[Category:Hipparcos objects|115250]]
[[Category:HR objects|8880]]
[[Category:Henry Draper Catalogue objects|220061]]
[[Category:Durchmusterung objects|BD+22 4810]]
[[Category:Delta Scuti variables]]
[[Category:Delta Scuti variables]]
[[Category:Peculiar stars]]




Revision as of 08:29, 7 December 2016

Tau Pegasi
Location of τ Pegasi (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pegasus
Right ascension 23h 20m 38.24188s[1]
Declination +23° 44′ 25.2098″[1]
Apparent magnitude (V) +4.58[2]
Characteristics
Spectral type A5 Vp[3]
U−B color index +0.13[4]
B−V color index +0.17[4]
Variable type δ Sct[5]
Astrometry
Radial velocity (Rv)+15.20 ± 1.6[6] km/s
Proper motion (μ) RA: 29.45 ± 0.33[1] mas/yr
Dec.: –9.53 ± 0.27[1] mas/yr
Parallax (π)20.17 ± 0.40 mas[1]
Distance162 ± 3 ly
(49.6 ± 1.0 pc)
Absolute magnitude (MV)1.10[2]
Details
Mass2.14[7] M☉
Radius2.8[8] R☉
Luminosity32[7] L☉
Surface gravity (log g)3.88[9] cgs
Temperature7,709[7] K
Metallicity [Fe/H]-0.28[2] dex
Rotational velocity (v sin i)149[7] km/s
Other designations
BD+22°4810, 62 Pegasi, FK5 880, GC 32503, HIP 115250, HR 8880, HD 220061, SAO 91186
Database references
SIMBADdata

Tau Pegasi (τ Peg, τ Pegasi) is a 4.6 magnitude star in the constellation Pegasus. The star has also the traditional names Salm,[10] Kerb (or El Khereb) and Markab, a name shared with α Pegasi, k Puppis and κ Velorum.[11] τ Pegasi belongs to the spectral class A5 Vp,[3] making it an A-type main sequence star.

This is a Delta Scuti variable star with a pulsation period of 0.94 hours. It is rotating rapidly with a projected rotational velocity of 150 km s−1. Tau Pegasi is radiating nearly 30 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 7,762 K.[12]

References

  1. ^ a b c d e van Leeuwen, F. (November 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
  2. ^ a b c Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. ^ a b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
  5. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....1.2025S.
  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  7. ^ a b c d Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. Vizier catalog entry
  8. ^ Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002. Bibcode:1999A&A...352..555A. Vizier catalog entry
  9. ^ David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
  10. ^ Allen, Richard Hinckley (1899). Star-names and their meanings. New York, Leipzig [etc.] G.E. Stechert. p. 329.
  11. ^ HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)
  12. ^ Balona, L. A.; Dziembowski, W. A. (October 1999), "Excitation and visibility of high-degree modes in stars", Monthly Notices of the Royal Astronomical Society, 309 (1): 221–232, Bibcode:1999MNRAS.309..221B, doi:10.1046/j.1365-8711.1999.02821.x


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