HD 37811
In today's world, HD 37811 has become a topic of great relevance and interest to an increasingly broad audience. Whether due to its impact on society, its historical relevance or its importance in the current context, HD 37811 continues to be a topic of debate and analysis in different areas. From the academic sphere to the popular sphere, HD 37811 continues to generate interest and provoke reflections on its implications and consequences for the contemporary world. In this article, we will explore different aspects related to HD 37811, analyzing its implications, its evolution over time and its relevance in the current context.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | 05h 39m 49.8397s |
| Declination | −32° 37′ 45.1772″ |
| Apparent magnitude (V) | 5.44±0.01 |
| Characteristics | |
| Evolutionary stage | RGB |
| Spectral type | G6/8 III |
| B−V color index | +0.92 |
| Astrometry | |
| Radial velocity (Rv) | −8.3±2 km/s |
| Proper motion (μ) | RA: −16.691 mas/yr Dec.: −31.588 mas/yr |
| Parallax (π) | 8.5366 ± 0.0492 mas |
| Distance | 382 ± 2 ly (117.1 ± 0.7 pc) |
| Absolute magnitude (MV) | +0.14 |
| Details | |
| 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 | 0.01±0.03 dex |
| Rotational velocity (v sin i) | 2.4±1.1 km/s |
| Age | 440 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 37811 (HR 1958) is a solitary star in the southern constellation Columba. It has an apparent magnitude of 5.44, allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 382 light years and it is currently approaching with a heliocentric radial velocity of −8.3 km/s.
HD 37811 has a stellar classification of G6/8 III — intermediate between a G6 and G8 giant star that is currently on the red giant branch. It has 3 times the mass of the Sun but has expanded to 11.7 times its girth at an age of 440 million years. It shines with a luminosity of 86 L☉ from its enlarged photosphere at an effective temperature of 5,139 K, giving a yellow glow. HD 37811 has a solar metallicity and spins leisurely with a projected rotational velocity of about 2.4 km/s.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Bibcode:1953GCRV..C......0W.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "HR 2411". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 15, 2022.
- ^ 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.
- ^ 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.
