HD 116029 is a binary star system about 400 light-years away.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Coma Berenices |
| Right ascension | 13h 20m 39.5422s[1] |
| Declination | +24° 38′ 55.3099″[1] |
| Apparent magnitude (V) | 7.89[2] |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | K1IV+M[3] |
| B−V color index | 1.009[4] |
| Astrometry | |
| Radial velocity (Rv) | -6.42 km/s |
| Proper motion (μ) | RA: -14.495 mas/yr Dec.: -52.193 mas/yr |
| Parallax (π) | 8.0853 ± 0.0384 mas[5] |
| Distance | 403 ± 2 ly (123.7 ± 0.6 pc) |
| Orbit[3] | |
| Primary | HD 116029 A |
| Companion | HD 116029 B |
| Semi-major axis (a) | 1.392" (171 AU) |
| Details[3] | |
| HD 116029 A | |
| Mass | 1.445±0.094[2] M☉ |
| Radius | 4.6±0.1[4] R☉ |
| Luminosity | 11.7[6] L☉ |
| Surface gravity (log g) | 3.40±0.06 cgs |
| Temperature | 4894±36[2] K |
| Metallicity | 0.12 ± 0.02[2] |
| Rotational velocity (v sin i) | 1.0±0.6[2] km/s |
| Age | 2.7±0.5[6] Gyr |
| HD 116029 B | |
| Mass | 0.26 M☉ |
| Surface gravity (log g) | 5.033±0.019 cgs |
| Other designations | |
| Database references | |
| SIMBAD | data |
The primary subgiant star HD 116029 A belongs to the spectral class K1. Its age is younger than the Sun`s at 2.7±0.5 billion years.[6] The primary star is slightly enriched by heavy elements, having 130% of solar abundance.[4] The primary star does not have detectable flare activity.[7]
In 2016 the co-moving binary stellar companion HD 116029 B was detected. It is a red dwarf star of visual magnitude 16.[8] The companion was confirmed orbiting the primary at a projected separation of 171 AU in 2017.[3]
Planetary system
editIn 2011 one superjovian planet, HD 116029 b, on a mildly eccentric orbit around star HD 116029 A was discovered utilizing the radial velocity method.[4] One more planet on a wider orbit was detected in 2016. The planets b and c are orbiting in a 2:3 orbital resonance.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| HD 116029 A b | ≥2.1±0.2 MJ | 1.73±0.04 | 670.2±8.3 | <0.21 | — | — |
| HD 116029 A c | ≥1.27±0.1 MJ | — | 907±30 | 0.038+0.127 −0.038 |
— | — |
References
edit- ^ a b c "HD 116029". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 October 2020.
- ^ a b c d e Ghezzi, Luan; Montet, Benjamin T.; Johnson, John Asher (2018), "Retired a Stars Revisited: An Updated Giant Planet Occurrence Rate as a Function of Stellar Metallicity and Mass", The Astrophysical Journal, 860 (2): 109, arXiv:1804.09082, Bibcode:2018ApJ...860..109G, doi:10.3847/1538-4357/aac37c, S2CID 118969017
- ^ a b c d Ngo, Henry (2017), "No Difference in Orbital Parameters of RV-detected Giant Planets between 0.1 and 5 au in Single versus Multi-stellar Systems", The Astronomical Journal, 153 (6): 242, arXiv:1704.02326, Bibcode:2017AJ....153..242N, doi:10.3847/1538-3881/aa6cac, S2CID 119106164
- ^ a b c d e John Asher Johnson; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wright, Jason T.; Isaacson, Howard (2011), "Retired a Stars and Their Companions. Vii. 18 New Jovian Planets", The Astrophysical Journal Supplement Series, 197 (2): 26, arXiv:1108.4205, Bibcode:2011ApJS..197...26J, doi:10.1088/0067-0049/197/2/26, S2CID 15088371
- ^ 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.
- ^ a b c Bonsor, Amy; Kennedy, Grant M.; Wyatt, Mark C.; Johnson, John A.; Sibthorpe, Bruce (2013), "Herschel Observations of Debris Discs Orbiting Planet-hosting Subgiants", Monthly Notices of the Royal Astronomical Society, 437 (4): 3288–3297, arXiv:1311.2947, doi:10.1093/mnras/stt2128, S2CID 53586078
- ^ Evgenya L. Shkolnik, "AN ULTRAVIOLET INVESTIGATION OF ACTIVITY ON EXOPLANET HOST STARS", 2013
- ^ Ginski, C.; Mugrauer, M.; Seeliger, M.; Buder, S.; Errmann, R.; Avenhaus, H.; Mouillet, D.; Maire, A.-L.; Raetz, S. (2016), "A lucky imaging multiplicity study of exoplanet host stars II", Monthly Notices of the Royal Astronomical Society, 457 (2): 2173–2191, arXiv:1601.01524, Bibcode:2016MNRAS.457.2173G, doi:10.1093/mnras/stw049, S2CID 53626523
- ^ Bryan, Marta L.; Knutson, Heather A.; Howard, Andrew W.; Ngo, Henry; Batygin, Konstantin; Crepp, Justin R.; Fulton, B. J.; Hinkley, Sasha; Isaacson, Howard; Johnson, John A.; Marcy, Geoffry W.; Wright, Jason T. (2016), "Statistics of Long Period Gas Giant Planets in Known Planetary Systems", The Astrophysical Journal, 821 (2): 89, arXiv:1601.07595, Bibcode:2016ApJ...821...89B, doi:10.3847/0004-637X/821/2/89, S2CID 19709252
- ^ Planet HD 116029 A c on exoplanet.eu