| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Virgo |
| HD 126614 A | |
| Right ascension | 14h 26m 48.279494s [1] |
| Declination | −05° 10′ 40.01306″ [1] |
| Apparent magnitude (V) | 8.81±0.03 [2] |
| LP 680-57 | |
| Right ascension | 14h 26m 45.836397s [3] |
| Declination | −05° 10′ 19.427938″ [3] |
| Apparent magnitude (V) | 16.68±0.20 [2] |
| Characteristics | |
| Spectral type | G8IV [4] + M [5] + M5.5V [6] |
| Apparent magnitude (B) | 9.620 [7] |
| Apparent magnitude (J) | 7.470±0.021 [7] |
| Apparent magnitude (H) | 7.160±0.042 [7] |
| Apparent magnitude (K) | 7.060±0.036 [7] |
| B−V color index | 0.810±0.004 [7] |
| Astrometry | |
| HD 126614 A | |
| Radial velocity (Rv) | −32.897±0.0042 [8] km/s |
| Proper motion (μ) |
RA: −149.760±0.023
mas/
yr
[1] Dec.: −145.837±0.018 mas/ yr [1] |
| Parallax (π) | 13.6633 ± 0.0166 mas [1] |
| Distance | 238.7 ± 0.3
ly (73.19 ± 0.09 pc) |
| Absolute magnitude (MV) | 4.52 [7] |
| LP 680-57 | |
| Radial velocity (Rv) | −29.45±5.52 [3] km/s |
| Proper motion (μ) |
RA: −147.861±0.038
mas/
yr
[3] Dec.: −149.118±0.034 mas/ yr [3] |
| Parallax (π) | 13.6050 ± 0.0316 mas [3] |
| Distance | 239.7 ± 0.6
ly (73.5 ± 0.2 pc) |
| Absolute magnitude (MV) | 12.02 [5] |
| Orbit [9] | |
| Companion | HD 126614 B |
| Period (P) | 59.979+4.696 −5.059 yr |
| Semi-major axis (a) | 15.229+0.984 −1.094 AU |
| Eccentricity (e) | 0.056+0.017 −0.018 |
| Inclination (i) | 16.294+0.881 −0.771° |
| Longitude of the node (Ω) | 284.664+2.600 −3.304° |
| Periastron epoch (T) | 2450124.747+26.090 −28.486 |
|
Argument of periastron (ω) (secondary) | 240.567+30.578 −43.150° |
|
Semi-amplitude (K1) (primary) | 0.167573+0.012902 −0.011124 km/s |
| Details | |
| HD 126614 A | |
| Mass | 1.145±0.03 [5] M☉ |
| Radius | 1.09±0.06 [5] R☉ |
| Luminosity | 1.21±0.19 [5] L☉ |
| Surface gravity (log g) | 4.39±0.08 [5] cgs |
| Temperature | 5,585±44 [5] K |
| Metallicity | +0.56±0.04 [5] |
| Rotation | ~99 days [5] |
| Rotational velocity (v sin i) | 2.0±0.5 [5] km/s |
| Age | 7.2±2.0 [5] Gyr |
| HD 126614 B | |
| Mass | 81.128+7.778 −7.922 [9] MJup |
| LP 680-57 | |
| Mass | 0.32 [10] [11] M☉ |
| Radius | 0.32 [10] [11] R☉ |
| Luminosity | 0.0106 [10] L☉ |
| Surface gravity (log g) | 4.93 [10] cgs |
| Temperature | 3,275 [10] [11] K |
| Metallicity [Fe/H] | +0.46 [6] dex |
| Age | 3.6 – 6.0 [6] Gyr |
| Other designations | |
| HD 126614 AB: BD–04°3690, HD 126614, HIP 70623, SAO 139932, PPM 197558, G 124-40, LTT 5698, NLTT 37355 [12] | |
| LP 680-57: LP 680-57, NLTT 37349 [13] | |
| Database references | |
| SIMBAD | A |
| C | |
| Exoplanet Archive | data |
HD 126614 is a trinary star [14] system in the equatorial constellation of Virgo. The primary member, designated component A, is host to an exoplanetary companion. With an apparent visual magnitude of 8.81, [7] it is too faint to be seen with the naked eye. The system is located at a distance of 239 light years from the Sun based on parallax measurements, [1] but is drifting closer with a radial velocity of −33 km/s. [8]
Stellar system
HD 126614 A
The primary is a late G-type star with a stellar classification of G8IV. [4] It is a super metal-rich star; among the most metal-rich stars currently known. [15] This is most likely an evolving subgiant star, but the very high metallicity makes comparisons to standard spectral types difficult. [16]
HD 126614 C
In 2010, a close stellar companion was resolved and designated component C. This object is a faint red dwarf at an angular separation of 0.5 ″, which corresponds to a projected physical separation of ~ 36 AU. [16] More recent observations using radial velocity and astrometry have refined the parameters of HD 126614 C. It has an orbital period of about 60 years, with a smaller semi-major axis of 15 AU and a very low mass of 81.1 MJ. [9] This mass is very near the mass limit allowed for hydrogen fusion.
HD 126614 B
The outer companion, designated LP 680-57, was first reported in 1960 with the W. J. Luyten proper motion catalog. [17] It is a magnitude 17.0 red dwarf with a class of M5.5, [6] located at an angular separation of 41.90″ from the primary along a position angle of 299°, as of 2015. [17] They have a physical projected separation of 3,040 AU. [6] The common proper motion of the system has been confirmed, indicating that they are gravitationally bound. [16] Many multiple star catalogues still refer to this companion as component B, as it was known prior to the discovery of the closer companion. [17]
Planetary system
A Doppler search for giant planets begun in 1997 at the Keck Observatory provided an 11 year baseline for detecting periodicity in the primary star's radial velocity data. In 2010, a Jovian companion was announced with an orbital period of 3.41 years. [5] In 2022, the inclination and true mass of HD 126614 Ab were measured via astrometry. [9]
| Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.339+0.204 −0.019 MJ |
2.249+0.088 −0.096 |
3.442+0.016 −0.017 |
0.548+0.063 −0.062 |
97.477+35.340 −37.849 ° |
— |
See also
References
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b "HD 126614". NASA Exoplanet Archive. Retrieved 30 August 2022.
- ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode: 1999MSS...C05....0H.
- ^ a b c d e f g h i j k l Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal. 721 (2): 1467–1481. arXiv: 1003.3488. Bibcode: 2010ApJ...721.1467H. doi: 10.1088/0004-637X/721/2/1467. S2CID 14147776.
- ^ a b c d e Deacon, Niall R.; et al. (2014). "Wide Cool and Ultracool Companions to Nearby Stars from Pan-STARRS 1". The Astrophysical Journal. 792 (2). 119. arXiv: 1407.2938. Bibcode: 2014ApJ...792..119D. doi: 10.1088/0004-637X/792/2/119. S2CID 38354181.
- ^ a b c d e f g Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID 119257644.
- ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv: 1804.09370. Bibcode: 2018A&A...616A...7S. doi: 10.1051/0004-6361/201832795. S2CID 52952408.
- ^ a b c d e Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv: 2208.12720. Bibcode: 2022ApJS..262...21F. doi: 10.3847/1538-4365/ac7e57. S2CID 251864022.
- ^ a b c d e Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R.; Lépine, Sébastien; Mann, Andrew; Muirhead, Philip S.; Rojas-Ayala, Bárbara; Silvotti, Roberto; Fleming, Scott W.; Levine, Al; Plavchan, Peter; the TESS Target Selection Working Group (2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv: 1706.00495. Bibcode: 2018AJ....156..102S. doi: 10.3847/1538-3881/aad050. S2CID 73582386.
- ^ a b c Muirhead, Philip S.; Dressing, Courtney D.; Mann, Andrew W.; Rojas-Ayala, Bárbara; Lépine, Sébastien; Paegert, Martin; De Lee, Nathan; Oelkers, Ryan (2018). "A Catalog of Cool Dwarf Targets for the Transiting Exoplanet Survey Satellite". The Astronomical Journal. 155 (4): 180. arXiv: 1710.00193. Bibcode: 2018AJ....155..180M. doi: 10.3847/1538-3881/aab710. S2CID 119184794.
- ^ a b "HD 126614". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-10-10.
- ^ "LP 680-57". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2022-08-30.
- ^ Busetti, F.; et al. (November 2018). "Stability of planets in triple star systems". Astronomy & Astrophysics. 619: 12. arXiv: 1811.08221. Bibcode: 2018A&A...619A..91B. doi: 10.1051/0004-6361/201833097. S2CID 119477324. A91.
- ^ Castro, Sandra; et al. (July 1997). "High-Resolution Abundance Analysis of Very Metal-rich Stars in the Solar Neighborhood". Astronomical Journal. 114: 376–387. arXiv: astro-ph/9704220. Bibcode: 1997AJ....114..376C. doi: 10.1086/118481. S2CID 119368399.
- ^ a b c Lodieu, N.; et al. (September 2014). "Binary frequency of planet-host stars at wide separations. A new brown dwarf companion to a planet-host star". Astronomy & Astrophysics. 569: 14. arXiv: 1408.1208. Bibcode: 2014A&A...569A.120L. doi: 10.1051/0004-6361/201424210. S2CID 118516214. A120.
- ^ a b c Mason, B. D.; et al. (2014). "The Washington Visual Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920.
