HD 107148
HD 107148 is an 8th magnitude primary of the binary star system located approximately 161 light years away in the constellation of Virgo. It is a yellow dwarf with a luminosity 1.41 times the Sun. It is twice as enriched with heavy elements than the Sun. The HD 107148 exhibits a magnetic activity cycle with a period around 6 years.[6]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 19m 13.4909s[1] |
| Declination | −03° 19′ 11.242″[1] |
| Apparent magnitude (V) | 8.02 |
| Characteristics | |
| Spectral type | G5V |
| Astrometry | |
| Proper motion (μ) | RA: −54.787±0.108[1] mas/yr Dec.: −47.395±0.064[1] mas/yr |
| Parallax (π) | 20.2077 ± 0.0470 mas[1] |
| Distance | 161.4 ± 0.4 ly (49.5 ± 0.1 pc) |
| Orbit[2] | |
| Primary | HD 107148 |
| Companion | HD 107148 B |
| Semi-major axis (a) | 35" (1790 AU) |
| Details[3] | |
| HD 107148 | |
| Mass | 1.1±0.1 M☉ |
| Radius | 1.15±0.03 R☉ |
| Luminosity | 1.34±0.05 L☉ |
| Surface gravity (log g) | 4.35±0.03 cgs |
| Temperature | 5789±36 K |
| Metallicity [Fe/H] | 0.33±0.09[4] dex |
| Rotational velocity (v sin i) | 1.22±0.20[4] km/s |
| Age | 4±1 Gyr |
| HD 107148 B | |
| Mass | 0.6[2] M☉ |
| Temperature | 6250±250[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
In 2012, a comoving white dwarf stellar companion HD 107148 B was detected[7] at projected separation of 1790 AU, and was confirmed in 2014. It is a 0.6 M☉ remnant core of the former 1.8±0.2 M☉ star.[2]
Planetary system
In 2006, a discovery of Saturn-mass planet was announced.[8] Another Neptune-sized planet was discovered in 2021, together with significantly refined orbit of HD 107148 b.[6]
HD 107148 should not be confused with HD 108147, which also has an extrasolar planet located in Crux constellation discovered in 2000.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.196±0.009 MJ | 0.3692+0.0037 −0.0038 |
77.185+0.01 −0.025 |
0.15+0.02 −0.06 |
— | — |
| c | > 0.068+0.004 −0.005 MJ |
0.1415±0.0015 | 18.3270+0.0008 −0.0016 |
0.40+0.04 −0.08 |
— | — |
See also
References
- 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.
- New wide stellar companions of exoplanet host stars
- Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2015), "Age consistency between exoplanet hosts and field stars", Astronomy & Astrophysics, 585: A5, arXiv:1511.01744, Bibcode:2016A&A...585A...5B, doi:10.1051/0004-6361/201527297, S2CID 53971692
- Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES) I. Code description and dwarf stars catalogue
- "HD 107148". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-12.
- Rosenthal, Lee J.; Fulton, Benjamin J.; Hirsch, Lea A.; Isaacson, Howard T.; Howard, Andrew W.; Dedrick, Cayla M.; Sherstyuk, Ilya A.; Blunt, Sarah C.; Petigura, Erik A.; Knutson, Heather A.; Behmard, Aida; Chontos, Ashley; Crepp, Justin R.; Crossfield, Ian J. M.; Dalba, Paul A.; Fischer, Debra A.; Henry, Gregory W.; Kane, Stephen R.; Kosiarek, Molly; Marcy, Geoffrey W.; Rubenzahl, Ryan A.; Weiss, Lauren M.; Wright, Jason T. (2021), "The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades", The Astrophysical Journal Supplement Series, 255: 8, arXiv:2105.11583, Bibcode:2021ApJS..255....8R, doi:10.3847/1538-4365/abe23c, S2CID 235186973
- Wide companions to Hipparcos stars within 67 pc of the Sun
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
- Eberhardt, Jan; Trifonov, Trifon; Kürster, Martin; Stock, Stephan; Henning, Thomas; Wollbold, Anna; Reffert, Sabine; Lee, Man Hoi; Zechmeister, Mathias; Rodler, Florian; Zakhozhay, Olga; Heeren, Paul; Gandolfi, Davide; Barragán, Oscar; Tala Pinto, Marcelo; Wolthoff, Vera; Sarkis, Paula; Brems, Stefan S. (2022), "Dynamical Architecture of the HD 107148 Planetary System", The Astronomical Journal, 163 (5): 198, arXiv:2202.06702, Bibcode:2022AJ....163..198E, doi:10.3847/1538-3881/ac53b2, S2CID 246822760
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