Astronomy:HD 60532

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Short description: Star in the constellation Puppis
HD 60532
Location of HD 60532 (circled in red)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Puppis[1]
Right ascension  07h 34m 03.181s[2]
Declination −22° 17′ 45.84″[2]
Apparent magnitude (V) 4.450[3]
Characteristics
Evolutionary stage subgiant[2]
Spectral type F6 IV-V[4]
U−B color index +0.07[5]
B−V color index +0.51[5]
Astrometry
Radial velocity (Rv)+61.042±0.0004[6] km/s
Proper motion (μ) RA: −40.180[2] mas/yr
Dec.: +46.791[2] mas/yr
Parallax (π)38.1379 ± 0.1087[2] mas
Distance85.5 ± 0.2 ly
(26.22 ± 0.07 pc)
Absolute magnitude (MV)+2.42[1]
Details
Mass1.44+0.03−0.1[7] M☉
Radius2.66±0.03[8] R☉
Luminosity9.3±0.1[8] L☉
Surface gravity (log g)3.75±0.02[8] cgs
Temperature6,095[7] K
Metallicity [Fe/H]−0.42[7] dex
Rotational velocity (v sin i)8[7] km/s
Age2.7±0.1[7] Gyr
Other designations
BD−21°2007, GC 10134, GJ 279, HIP 36795, HR 2906, SAO 174009, 2MASS J07340317-2217457[9][10][11]
Database references
SIMBADdata
Exoplanet Archive60532 data
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

HD 60532, also known as Gliese 279, is a star with two orbiting exoplanets in the southern constellation of Puppis. The designation HD 60532 takes its name from the Henry Draper Catalogue. It is #279 in the Gliese Catalogue of Nearby Stars. The system is located at a distance of 85.5 light years from the Sun, and is drifting further away with a radial velocity of 61 km/s.[6] At that distance, the star has an apparent visual magnitude of 4.45,[3] which is bright enough to be faintly visible to the naked eye. The motion of this system through space brought it within 10.3 light-years of the Sun some 408,600 years ago.[12]

The spectrum of this star shows blended features of an F-type main-sequence star and an evolving subgiant star, with a corresponding stellar classification of F6 IV-V.[4] It is an estimated 2.7 billion years old with a projected rotational velocity of 8 km/s and a low level of magnetic activity in its chromosphere.[7] The star has 1.44[7] times the mass of the Sun and 2.66 times the Sun's radius.[8] The abundance of iron, a measure of the star's metallicity, is 38% that of the Sun.[7] HD 60532 is radiating 9.3[8] times the luminosity of the Sun from its photosphere at an effective temperature of 6,095 K.[7]

Planetary system

In September 2008, two Jupiter-like planets, components b and c, were found orbiting the star, by Desort et al at the La Silla Observatory.[7] The orbital periods of these two planets appear to be in 3:1 resonance.[13] However, their inclination is still unknown and therefore their radii cannot be calculated.

The HD 60532 planetary system[14]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥1.06±0.08 MJ 0.77±0.02 201.9±0.3 0.26±0.02 — —
c ≥2.51±0.16 MJ 1.60±0.04 600.1±2.4 0.03±0.02 — —

See also

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 Nordström, B. et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics 418: 989–1019, doi:10.1051/0004-6361:20035959, Bibcode: 2004A&A...418..989N. 
  4. ↑ 4.0 4.1 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, doi:10.1086/504637, Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 Soubiran, C. et al. (2018), "Gaia Data Release 2. The catalogue of radial velocity standard stars", Astronomy and Astrophysics 616: A7, doi:10.1051/0004-6361/201832795, Bibcode: 2018A&A...616A...7S. 
  7. ↑ 7.00 7.01 7.02 7.03 7.04 7.05 7.06 7.07 7.08 7.09 Desort, M. et al. (2008), "Extrasolar planets and brown dwarfs around A-F type stars V. A planetary system found with HARPS around the F6IV-V star HD 60532", Astronomy and Astrophysics 491 (3): 883–888, doi:10.1051/0004-6361:200810241, Bibcode: 2008A&A...491..883D. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 Bonfanti, A. et al. (2016), "Age consistency between exoplanet hosts and field stars", Astronomy & Astrophysics 585: 14, doi:10.1051/0004-6361/201527297, A5, Bibcode: 2016A&A...585A...5B. 
  9. ↑ "HD 60532". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+60532. 
  10. ↑ Uranometria Argentina: brightness and position of every fixed star, down to the seventh magnitude, within one hundred degrees of the South Pole, 1, Observatorio Nacional Argentino, 1879, p. 172, https://books.google.com/books?id=VhE1AQAAIAAJ&pg=PA172. 
  11. ↑ Gould, Benjamin Apthorp; Pilcher, Frederick, Uranometria Argentina, Revised, http://www.uranometriaargentina.com/, retrieved 2011-12-08. 
  12. ↑ Bailer-Jones, C.A.L.; Rybizki, J.; Andrae, R.; Fouesnea, M. (2018), "New stellar encounters discovered in the second Gaia data release", Astronomy & Astrophysics 616: A37, doi:10.1051/0004-6361/201833456, Bibcode: 2018A&A...616A..37B. 
  13. ↑ Laskar, J.; Correia, A. C. M. (2009), "HD60532, a planetary system in a 3:1 mean motion resonance", Astronomy & Astrophysics Letters 496 (2): L5–L8, doi:10.1051/0004-6361/200911689, Bibcode: 2009A&A...496L...5L. 
  14. ↑ Borgniet, S. et al. (2017), "Extrasolar planets and brown dwarfs around AF-type stars. IX. The HARPS southern sample", Astronomy and Astrophysics 599: A57, doi:10.1051/0004-6361/201628805, Bibcode: 2017A&A...599A..57B. 

Coordinates: Sky map 07h 34m 03.1805s, −22° 17′ 45.841″



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