Gamma Pavonis

Gamma Pavonis
	Location of γ Pavonis (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Pavo
Right ascension	21h 26m 26.60484s[1]
Declination	−65° 21′ 58.3145″[1]
Apparent magnitude (V)	4.22[2]
Characteristics
Spectral type	F9 V Fe-1.4 CH-0.7[3]
U−B color index	−0.13[4]
B−V color index	+0.48[4]
Variable type	Suspected
Astrometry
Radial velocity (Rv)	−29.9[5] km/s
Proper motion (μ)	RA: +80.56[1] mas/yr ; Dec.: +800.60[1] mas/yr
Parallax (π)	107.97 ± 0.19 mas[1]
Distance	30.21 ± 0.05 ly ; (9.26 ± 0.02 pc)
Absolute magnitude (MV)	4.40[5]
Details
Mass	1.21±0.12[6] M☉
Radius	1.15±0.04[6] R☉
Luminosity	1.52±0.05[6] L☉
Surface gravity (log g)	4.3[2] cgs
Temperature	6,112[2] K
Metallicity [Fe/H]	–0.80[2] dex
Rotational velocity (v sin i)	1.0±0.6[6] km/s
Age	1.0[5] or 7.25[7] Gyr
Other designations
	γ Pav, CD−65° 2751, FK5 805, GJ 827, HD 203608, HIP 105858, HR 8181, SAO 254999, LHS 3674, LTT 8510
Database references
SIMBAD	data

Gamma Pavonis, Latinized from γ Pavonis, is a star in the southern circumpolar constellation of Pavo. With an apparent visual magnitude of 4.22,[2] it is a fourth-magnitude star and thereby visible to the naked eye. From parallax observations with the Hipparcos satellite, the distance to this star has been estimated at 30.21 light-years (9.26 parsecs).[1] It is drifting closer to the Sun with a radial velocity of −30 km/s.[5]

Compared to the Sun, this star has a 21% greater mass and a 15% larger radius. It is a brighter star with 152% of the Sun's luminosity,[6] which is it radiating from the outer envelope at an effective temperature of 6,112 K.[2] The stellar classification of F9 V[3] puts it in the class of F-type main sequence stars that generate energy through the nuclear fusion of hydrogen at the core. It is a metal-poor star, which means it has a low abundance of elements heavier than helium. Age estimates range from a low of a billion[5] years up to 7.25 billion years.[7] Gamma Pavonis is orbiting through the Milky Way at an unusually high peculiar velocity relative to nearby stars.

This star has rank 14 on TPF-C's top 100 target stars to search for a rocky planet in the Habitable Zone, approximately 1.2 AU, or a little beyond an Earth-like orbit.

References

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, S2CID 18759600
Jehin, E.; et al. (January 1999), "Abundance correlations in mildly metal-poor stars", Astronomy and Astrophysics, 341: 241–255, arXiv:astro-ph/9809405, Bibcode:1999A&A...341..241J
Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992
Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
Holmberg, J.; Nordstrom, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. S2CID 118577511.
Bruntt, H.; et al. (July 2010), "Accurate fundamental parameters for 23 bright solar-type stars", Monthly Notices of the Royal Astronomical Society, 405 (3): 1907–1923, arXiv:1002.4268, Bibcode:2010MNRAS.405.1907B, doi:10.1111/j.1365-2966.2010.16575.x, S2CID 118495267
Mosser, B.; Deheuvels, S.; Michel, E.; Thévenin, F.; Dupret, M. A.; Samadi, R.; Barban, C.; Goupil, M. J. (2008). "HD 203608, a quiet asteroseismic target in the old galactic disk". Astronomy and Astrophysics. 488 (2): 635–642. arXiv:0804.3119. Bibcode:2008A&A...488..635M. doi:10.1051/0004-6361:200810011. S2CID 15871263.

External links

Gamma Pavonis SolStation entry.
ARICNS

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[aaa474_2_653-1] 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, S2CID 18759600

[aaa341_241-2] Jehin, E.; et al. (January 1999), "Abundance correlations in mildly metal-poor stars", Astronomy and Astrophysics, 341: 241–255, arXiv:astro-ph/9809405, Bibcode:1999A&A...341..241J

[aj132_1_161-3] Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992

[clpl4_99-4] Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J

[aaa501_3_941-5] Holmberg, J.; Nordstrom, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics". Astronomy and Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. S2CID 118577511.

[mnras405_3_1907-6] Bruntt, H.; et al. (July 2010), "Accurate fundamental parameters for 23 bright solar-type stars", Monthly Notices of the Royal Astronomical Society, 405 (3): 1907–1923, arXiv:1002.4268, Bibcode:2010MNRAS.405.1907B, doi:10.1111/j.1365-2966.2010.16575.x, S2CID 118495267

[mosser2008-7] Mosser, B.; Deheuvels, S.; Michel, E.; Thévenin, F.; Dupret, M. A.; Samadi, R.; Barban, C.; Goupil, M. J. (2008). "HD 203608, a quiet asteroseismic target in the old galactic disk". Astronomy and Astrophysics. 488 (2): 635–642. arXiv:0804.3119. Bibcode:2008A&A...488..635M. doi:10.1051/0004-6361:200810011. S2CID 15871263.