HD 196050
Characteristics
The primary component is a G-type main-sequence star with a stellar classification of G3V. It has a quiescent chromosphere and does not appear to be variable. The star has 18% more mass than the Sun and a 46% greater size. It is around 2.5 billion years old with a higher than solar metallicity, and is spinning with a projected rotational velocity of 3 km/s. The star is radiating 2.21 times the luminosity of the Sun from its photosphere at an effective temperature of 5,834 K.
A faint co-moving companion star, designated component B, was detected based on observations during 2003–2004, located 10.80″ to the south of the primary component. This corresponds to a projected separation of 7,511±22 AU. The star is magnitude 10.62 A third companion, component C, was discovered in 2007, located about 0.4″ from component B. It has a visual magnitude of 15.6.
Planetary system
In 2002, the Anglo-Australian Planet Search team announced the discovery of an extrasolar planet orbiting the star. The discovery was independently confirmed by the Geneva Extrasolar Planet Search team. In 2023, the inclination and true mass of HD 196050 b were determined via astrometry.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 4.55+0.69 −0.72 MJ |
2.585+0.032 −0.035 |
3.813+0.026 −0.024 |
0.178±0.011 | 41.0+10.0 −6.3 or 139.0+6.3 −10.0° |
— |
See also
References
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
- ^ Houk, Nancy (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Department of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
- ^ Chavero, C.; et al. (August 2019). "Emerging trends in metallicity and lithium properties of debris disc stars". Monthly Notices of the Royal Astronomical Society. 487 (3, p.3162-3177): 3162–3177. arXiv:1905.12066. Bibcode:2019MNRAS.487.3162C. doi:10.1093/mnras/stz1496. S2CID 168169634.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. S2CID 5233877.
- ^ "HD 196050". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-25.
- ^ Mugrauer, M.; et al. (2005). "Four new wide binaries among exoplanet host stars". Astronomy and Astrophysics. 440 (3): 1051–1060. arXiv:astro-ph/0507101. Bibcode:2005A&A...440.1051M. doi:10.1051/0004-6361:20042297. S2CID 14065040.
- ^ Roell, T.; et al. (June 2012). "Extrasolar planets in stellar multiple systems". Astronomy & Astrophysics. 542: 10. arXiv:1204.4833. Bibcode:2012A&A...542A..92R. doi:10.1051/0004-6361/201118051. S2CID 55755453. A92.
- ^ Jones, Hugh R. A.; et al. (December 2002). "Extrasolar planets around HD 196050, HD 216437 and HD 160691". Monthly Notices of the Royal Astronomical Society. 337 (4): 1170–1178. arXiv:astro-ph/0206216. Bibcode:2002MNRAS.337.1170J. doi:10.1046/j.1365-8711.2002.05787.x. S2CID 119520409.
- ^ Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
Further reading
- Greenhill, L.; et al. (2002). "epsilon Eridani, upsilon Andromedae, 51 Pegasi, HD 209458, HD 196050". IAU Circular. 7985: 1. Bibcode:2002IAUC.7985....1G.
