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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]
Distance382 ± 2  ly
(117.1 ± 0.7  pc)
Absolute magnitude (MV)+0.14 [7]
Details [7]
Mass3.0±0.1  M☉
Radius11.68±0.20  R☉
Luminosity86±2  L☉
Surface gravity (log g)2.81±0.08  cgs
Temperature5,139±34  K
Metallicity [Fe/H]0.01±0.03  dex
Rotational velocity (v sin i)2.4±1.1 [8] km/s
Age440 [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]

References

  1. ^ a b c d e 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. ^ a b 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. ^ a b 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. ^ a b 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. ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode: 1953GCRV..C......0W.
  7. ^ a b c d e f g 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. ^ a b 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. ^ a b 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.
Retrieved from " https://en.wikipedia.org/?title=HD_37811&oldid=1141257884"
From Wikipedia, the free encyclopedia
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]
Distance382 ± 2  ly
(117.1 ± 0.7  pc)
Absolute magnitude (MV)+0.14 [7]
Details [7]
Mass3.0±0.1  M☉
Radius11.68±0.20  R☉
Luminosity86±2  L☉
Surface gravity (log g)2.81±0.08  cgs
Temperature5,139±34  K
Metallicity [Fe/H]0.01±0.03  dex
Rotational velocity (v sin i)2.4±1.1 [8] km/s
Age440 [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]

References

  1. ^ a b c d e 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. ^ a b 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. ^ a b 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. ^ a b 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. ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode: 1953GCRV..C......0W.
  7. ^ a b c d e f g 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. ^ a b 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. ^ a b 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.
Retrieved from " https://en.wikipedia.org/?title=HD_37811&oldid=1141257884"

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