astro.wikisort.org - Star
HD 164509 is a binary star system composed of two main sequence stars in the constellation of Ophiuchus.
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 18h 01m 31.2276s |
| Declination | 00° 06′ 16.4026″ |
| Apparent magnitude (V) | 8.103 |
| Characteristics | |
| Evolutionary stage | main sequence star |
| Spectral type | G2V |
| B−V color index | 0.72 |
| J−H color index | 0.273 |
| J−K color index | 0.352 |
| Astrometry | |
| Radial velocity (Rv) | 13.68±0.16 km/s |
| Proper motion (μ) | RA: -7.864±0.087 mas/yr Dec.: -20.380±0.086 mas/yr |
| Parallax (π) | 18.7994 ± 0.0503 mas |
| Distance | 173.5 ± 0.5 ly (53.2 ± 0.1 pc) |
| Details[1][2][3] | |
| HD 164509A | |
| Mass | 1.13 M☉ |
| Radius | 1.06 R☉ |
| Surface gravity (log g) | 4.44 cgs |
| Temperature | 5922 K |
| Metallicity [Fe/H] | 0.21 dex |
| Rotational velocity (v sin i) | 2.4 km/s |
| Age | 1.5±0.2 Gyr |
| HD 164509B | |
| Mass | 0.33 M☉ |
| Other designations | |
BD+00 3837, HIP 88268,DENIS J084619.3-080136, 2MASS J18013121+0006163, Gaia DR2 4275421969292868224 | |
| Database references | |
| SIMBAD | 164509 data |
Star characteristics
HD 164509 primary star is a yellow main sequence star of spectral class G2, similar to the Sun. It is young and metal rich, having heavy elements abundance 160% of solar. Initially it was thought the system to comprise a single G5 class star, but in 2016 it was discovered the G2 primary is accompanied by the M-class red dwarf star at projected separation of 36.5±1.9 AU.[4] The evidence for the stellar companion being on bound orbit was further fortified in 2017.[5]
Planetary system
In 2011, a Hot Jupiter class planet HD 164509 b was discovered around primary of HD 164509 using the radial velocity method.[1] The planet HD 164509 b is impossible to form on the currently unstable in long term[6] orbit, and may be a captured object formed elsewhere.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.48±0.09 MJ | 0.875±0.008 | 282.4±3.8 | 0.26±0.14 | — | — |
References
- Giguere, Matthew J.; Fischer, Debra A.; Howard, Andrew W.; Johnson, John A.; Henry, Gregory W.; Wright, Jason T.; Marcy, Geoffrey W.; Isaacson, Howard T.; Hou, Fengji; Spronck, Julien (2012). "A High-Eccentricity Component in the Double-Planet System Around Hd 163607 and a Planet Around Hd 164509". The Astrophysical Journal. 744 (1): 4. arXiv:1109.2955. Bibcode:2012ApJ...744....4G. doi:10.1088/0004-637X/744/1/4. S2CID 119207947.
- A. Bonfanti, S. Ortolani, G. Piotto, and V. Nascimbeni, "Revising the ages of planet-hosting stars", 2015
- Marta L. Bryan et al., "STATISTICS OF LONG PERIOD GAS GIANT PLANETS IN KNOWN PLANETARY SYSTEMS", 2016
- Wittrock, Justin M.; Kane, Stephen R.; Horch, Elliott P.; Hirsch, Lea; Howell, Steve B.; Ciardi, David R.; Everett, Mark E.; Teske, Johanna K. (2016). "Stellar Companions to the Exoplanet Host Stars Hd 2638 and Hd 164509". The Astronomical Journal. 152 (5): 149. arXiv:1609.00016. Bibcode:2016AJ....152..149W. doi:10.3847/0004-6256/152/5/149. S2CID 45942803.
- Ngo, Henry; Knutson, Heather A.; Bryan, Marta L.; Blunt, Sarah; Nielsen, Eric L.; Batygin, Konstantin; Bowler, Brendan P.; Crepp, Justin R.; Hinkley, Sasha; Howard, Andrew W.; Mawet, Dimitri (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.
- Quarles, Billy; Li, Gongjie; Kostov, Veselin; Haghighipour, Nader (2020). "Orbital Stability of Circumstellar Planets in Binary Systems". The Astronomical Journal. 159 (3): 80. arXiv:1912.11019. Bibcode:2020AJ....159...80Q. doi:10.3847/1538-3881/ab64fa. S2CID 209444271.
- Fragione, Giacomo (2018). "Dynamical origin of S-type planets in close binary stars". Monthly Notices of the Royal Astronomical Society. arXiv:1812.02754. doi:10.1093/mnras/sty3367. S2CID 119457949.
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HD 164509 — звезда, которая находится в созвездии Змееносец на расстоянии около 169 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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