Astronomy:HD 116029
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Short description: Binary star system in the constellation of Coma Berenices
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[5] mas |
| 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 |
HD 116029 is a binary star system about 400 light-years away.
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
In 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
- ↑ 1.0 1.1 1.2 "HD 116029". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+116029.
- ↑ 2.0 2.1 2.2 2.3 2.4 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, doi:10.3847/1538-4357/aac37c, Bibcode: 2018ApJ...860..109G
- ↑ 3.0 3.1 3.2 3.3 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, doi:10.3847/1538-3881/aa6cac, Bibcode: 2017AJ....153..242N
- ↑ 4.0 4.1 4.2 4.3 4.4 John Asher Johnson; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael et al. (2011), "Retired a Stars and Their Companions. Vii. 18 New Jovian Planets", The Astrophysical Journal Supplement Series 197 (2): 26, doi:10.1088/0067-0049/197/2/26, Bibcode: 2011ApJS..197...26J
- ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 6.0 6.1 6.2 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, doi:10.1093/mnras/stt2128
- ↑ 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. et al. (2016), "A lucky imaging multiplicity study of exoplanet host stars II", Monthly Notices of the Royal Astronomical Society 457 (2): 2173–2191, doi:10.1093/mnras/stw049, Bibcode: 2016MNRAS.457.2173G
- ↑ Bryan, Marta L.; Knutson, Heather A.; Howard, Andrew W.; Ngo, Henry; Batygin, Konstantin; Crepp, Justin R.; Fulton, B. J.; Hinkley, Sasha et al. (2016), "Statistics of Long Period Gas Giant Planets in Known Planetary Systems", The Astrophysical Journal 821 (2): 89, doi:10.3847/0004-637X/821/2/89, Bibcode: 2016ApJ...821...89B
- ↑ Planet HD 116029 A c on exoplanet.eu
Coordinates: 
13h 20m 39.5422s, +24° 38′ 55.3099″
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