HD 37811

Last updated
HD 37811
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Columba
Right ascension 05h 39m 49.8397s [1]
Declination −32° 37′ 45.1772″ [1]
Apparent magnitude  (V)5.44±0.01 [2]
Characteristics
Evolutionary stage RGB [3]
Spectral type G6/8 III [4]
B−V color index +0.92 [5]
Astrometry
Radial velocity (Rv)−8.3±2 [6]  km/s
Proper motion (μ)RA: −16.691  mas/yr [1]
Dec.: −31.588  mas/yr [1]
Parallax (π)8.5366 ± 0.0492  mas [1]
Distance 382 ± 2  ly
(117.1 ± 0.7  pc)
Absolute magnitude  (MV)+0.14 [7]
Details [7]
Mass 3.0±0.1  M☉
Radius 11.68±0.20  R☉
Luminosity 86±2  L☉
Surface gravity (log g)2.81±0.08  cgs
Temperature 5,139±34  K
Metallicity [Fe/H]0.01±0.03  dex
Rotational velocity (v sin i)2.4±1.1 [8]  km/s
Age 440 [9]   Myr
Other designations
39 G. Columbae, CD−32°2479, CPD−32°879, GC  7082, HD  37811, HIP  26649, HR  1958, SAO  196061 [10] [11]
Database references
SIMBAD data

HD 37811 (HR 1958) is a solitary [12] star in the southern constellation Columba. It has an apparent magnitude of 5.44, [2] allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 382 light years [1] and it is currently approaching with a heliocentric radial velocity of −8.3  km/s . [6]

HD 37811 has a stellar classification of G6/8 III [4] — intermediate between a G6 and G8 giant star that is currently on the red giant branch. [3] It has 3 times the mass of the Sun [7] but has expanded to 11.7 times its girth [7] at an age of 440 million years. [9] It shines with a luminosity of 86  L☉ [7] from its enlarged photosphere at an effective temperature of 5,139  K , [7] giving a yellow glow. HD 37811 has a solar metallicity [7] and spins leisurely with a projected rotational velocity of about 2.4  km/s . [8]

Related Research Articles

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HD 76236 is a solitary star in the southern circumpolar constellation Apus. It has an apparent magnitude of 5.77, allowing it to be faintly seen with the naked eye. Located 612 light years away, it is receding with a heliocentric radial velocity of 7 km/s.

HD 11025 is a suspected astrometric binary in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.67, making it visible to the naked eye if viewed under ideal conditions. Located 378 light years away, it is receding with a heliocentric radial velocity of 18 km/s.

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HD 46568 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.25. Parallax measurements place the object at a distance of 284 light years and is currently receding with a heliocentric radial velocity of 39 km/s.

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HD 92209 is a probable spectroscopic binary in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.29, placing it near the max naked eye visibility. Parallax measurements place the system at a distance of 600 light years and is currently receding with a heliocentric radial velocity of almost 18 km/s.

HD 46815 is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  3. 1 2 Jones, M. I.; Jenkins, J. S.; Rojo, P.; Melo, C. H. F. (December 2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets: I. Sample definition and physical properties⋆⋆⋆". Astronomy & Astrophysics. 536: A71. arXiv: 1110.6459 . Bibcode:2011A&A...536A..71J. doi: 10.1051/0004-6361/201117887 . ISSN   0004-6361.
  4. 1 2 Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
  5. ↑ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  6. 1 2 Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode:1953GCRV..C......0W.
  7. 1 2 3 4 5 6 7 Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (January 2022). "CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars,". Astronomy & Astrophysics. 657: A87. arXiv: 2201.01528 . Bibcode:2022A&A...657A..87O. doi: 10.1051/0004-6361/202040078 . ISSN   0004-6361.
  8. 1 2 De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474 . Bibcode:2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762 . ISSN   0004-6361.
  9. 1 2 Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv: 0804.4473 . Bibcode:2008ApJS..178...89D. doi: 10.1086/589654 . eISSN   1538-4365. ISSN   0067-0049.
  10. ↑ "HR 2411". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved June 15, 2022.
  11. ↑ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode:1879RNAO....1.....G.
  12. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711.
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