HD 37811

In today's world, HD 37811 has become a topic of great relevance and interest to a wide spectrum of society. From its impact on the global economy to its influence on people's daily lives, HD 37811 has sparked debates and discussions in different areas. In order to understand this phenomenon more deeply, it is essential to analyze its different dimensions and repercussions. In this article, we will explore the many facets of HD 37811 and its relevance today, as well as the future perspectives it raises.

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 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
SIMBADdata

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.