HD 23514
HD 23514, is a star in the Pleiades. It is a main-sequence star of class F6, and has been seen to have hot dust particles orbiting around it. These materials, otherwise known as planetesimals which orbit within a circumstellar disc, are evidence of possible planetary formation.[1] The debris disk shows evidence of being rich in silica.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 46m 38.3957s |
| Declination | +22° 55′ 11.223″ |
| Apparent magnitude (V) | 14.92 ± 08 |
| Characteristics | |
| Spectral type | F6V |
| U−B color index | 0.55 |
| B−V color index | 0.44 |
| Variable type | 13.14 |
| Astrometry | |
| Radial velocity (Rv) | 12.5 ± 02 km/s |
| Proper motion (μ) | RA: 21.1 -43.0 mas/yr Dec.: 1.1 1.0 90 mas/yr |
| Distance | 400 ly (122.641 pc) |
| Details | |
| Mass | 1.35 M☉ |
| Radius | 1.28 R☉ |
| Luminosity | 2.8 L☉ |
| Temperature | 6400 K |
| Metallicity | 9.95 |
| Age | 0.1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star system itself is very young, in the 35~100 million years range,[1] meaning that it is very well likely at the stage of forming planets.
HD 23514 has a brown dwarf companion (HD 23154 B), estimated to have a mass of about 0.06 ± 0.01 solar masses and a temperature of 2,600 ± 100K, and separated by about 360 AU from the primary.[1] The spectra of HD 23154 B have been found to have features typical of late-M dwarfs, including FeH absorption, strong CO bands and Na I absorption, and a near-infrared spectral type of M8 ± 1 has been proposed.[3]
The star will be continuously studied to confirm whether it may be a potential candidate for planetary formation. These studies will be carried out by the Spitzer Space Telescope.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| HD 23514 b | M⊕ | ° | R⊕ | |||
| HD 23514 c | M⊕ | ° | R⊕ | |||
| Dust disk | 0.25–2 AU | — | — | |||
References
- Rodriguez, David R.; Marois, Christian; Zuckerman, B.; Macintosh, Bruce; Melis, Carl (2012). "A Substellar Companion to the Dusty Pleiades Star HD 23514". The Astrophysical Journal. 748 (1). arXiv:1112.4815. Bibcode:2012ApJ...748...30R. doi:10.1088/0004-637X/748/1/30.
- Meng, Huan Y. A.; Su, Kate Y. L.; Rieke, George H.; Rujopakarn, Wiphu; Myers, Gordon; Cook, Michael; Erdelyi, Emery; Maloney, Chris; McMath, James; Persha, Gerald; Poshyachinda, Saran (2015-05-21). "Planetary Collisions outside the Solar System: Time Domain Characterization of Extreme Debris Disks". The Astrophysical Journal. 805 (1): 77. arXiv:1503.05610. doi:10.1088/0004-637X/805/1/77. ISSN 1538-4357.
- Bowler, Brendan P.; Shkolnik, Evgenya L.; Liu, Michael C.; Schlieder, Joshua E.; Mann, Andrew W.; Dupuy, Trent J.; Hinkley, Sasha; Crepp, Justin R.; Johnson, John Asher; Howard, Andrew W.; Flagg, Laura (2015-06-09). "Planets Around Low-Mass Stars (PALMS). V. Age-Dating Low-Mass Companions to Members and Interlopers of Young Moving Groups". The Astrophysical Journal. 806 (1): 62. arXiv:1505.01494. doi:10.1088/0004-637X/806/1/62. ISSN 1538-4357.