 Star map shows star position on the northern edge of the constellation Crux | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Crux[1] |
| Right ascension | 12h 17m 53.191430s[2] |
| Declination | −55° 58′ 31.8904″[2] |
| Apparent magnitude (V) | 7.80[1] |
| Characteristics | |
| Evolutionary stage | pre-main sequence[3] |
| Spectral type | F5 V[4] |
| B−V color index | 0.458±0.003[1] |
| Astrometry | |
| Radial velocity (Rv) | +10.2±1.7[1] km/s |
| Proper motion (μ) | RA: −39.014[2] mas/yr Dec.: −12.872[2] mas/yr |
| Parallax (π) | 9.6774±0.0429 mas[2] |
| Distance | 337 ± 1 ly (103.3 ± 0.5 pc) |
| Absolute magnitude (MV) | +2.99[1] |
| Details | |
| A | |
| Mass | 1.35[3] M☉ |
| Age | 13±2[5] Myr |
| B | |
| Mass | 1.35[3] M☉ |
| Age | 13±2[5] Myr |
| Other designations | |
| CD−55°4537, HD 106906, HIP 59960, SAO 239819, 2MASS J12175319-5558319[6] | |
| Database references | |
| SIMBAD | data |
HD 106906 is a binary star[7] system in the southern constellation of Crux. It is too faint to be visible to the naked eye, having a combined apparent visual magnitude of 7.80.[1] The distance to this system is approximately 337 light years based on parallax, and it is receding from the Sun with a radial velocity of +10 km/s.[1] It is a member of the Lower Centaurus–Crux group of the Scorpius–Centaurus OB association of co-moving stars.[5]
This is a double-lined spectroscopic binary system consisting of two F-type main-sequence stars with similar masses and a matching stellar classification of F5 V.[7] Their orbital period is less than 100 days.[5]
Planetary system
[edit]
A distant circumbinary planet—HD 106906 b—is orbiting the pair at a projected separation of 732±30 AU with a period of at least 3,000 years. An infrared excess around the binary is coming from a circumstellar debris disk that is being viewed edge-on. This has a pronounced asymmetrical shape, extending 120 AU on the east side and out to 550 AU to the west.[5] Planetary orbit is inclined to the debris disk by 39+20
−15 degrees, and planet itself is visible nearly pole-on, having a large axial tilt.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| debris disk | 65–550 AU | 84.65 ± 0.35° | — | |||
| b | 11 ± 2 MJ | ~732 ± 30 AU | > 3000 | — | 64° | 1.54 +0.04 −0.05[10] RJ |
References
[edit]- ^ 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. XHIP record for this object at VizieR.
- ^ a b c d e 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.
- ^ a b c Rouan, Daniel; Boccaletti, Anthony; Perrot, Clément; Baudoz, Pierre; Mâlin, Mathilde; Lagage, Pierre-Olivier; Waters, Rens; Güdel, Manuel; Henning, Thomas; Vandenbussche, Bart; Absil, Olivier; Barrado, David; Cossou, Christophe; Decin, Leen; Glauser, Adrian M.; Pye, John; Patapis, Polychronis; Whiteford, Niall; Serabyn, Eugene; Choquet, Elodie; Ostlin, Göran; Ray, Tom P.; Wright, Gillian (2025). "MIRI-JWST mid-infrared direct imaging of the debris disk of HD 106906: Structure and mass of the disk". Astronomy and Astrophysics. 698. arXiv:2504.13679. Bibcode:2025A&A...698A.113R. doi:10.1051/0004-6361/202452302.
- ^ Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b c d e Rodet, L.; et al. (June 2017), "Origin of the wide-orbit circumbinary giant planet HD 106906. A dynamical scenario and its impact on the disk", Astronomy & Astrophysics, 602: 15, arXiv:1703.01857, Bibcode:2017A&A...602A..12R, doi:10.1051/0004-6361/201630269, S2CID 119424481, A12.
- ^ "HD 106906". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-30.
- ^ a b Lagrange, A. -M.; et al. (February 2016), "A narrow, edge-on disk resolved around HD 106906 with SPHERE", Astronomy & Astrophysics, 586: 6, arXiv:1510.02511, Bibcode:2016A&A...586L...8L, doi:10.1051/0004-6361/201527264, S2CID 4812512, L8.
- ^ Bryan, Marta L.; Chiang, Eugene; Morley, Caroline V.; Mace, Gregory N.; Bowler, Brendan P. (2021), "Obliquity Constraints on the Planetary-mass Companion HD 106906 b", The Astronomical Journal, 162 (5): 217, arXiv:2108.13437, Bibcode:2021AJ....162..217B, doi:10.3847/1538-3881/ac1bb1, S2CID 237364108
- ^ Kalas, Paul G.; et al. (2015), "Direct Imaging of an Asymmetric Debris Disk in the Hd 106906 Planetary System", The Astrophysical Journal, 814 (1): 32, arXiv:1510.02747, Bibcode:2015ApJ...814...32K, doi:10.1088/0004-637X/814/1/32, S2CID 59575201
- ^ Bryan, Marta L.; Ginzburg, Sivan; Chiang, Eugene; Morley, Caroline; Bowler, Brendan P.; Xuan, Jerry W.; Knutson, Heather A. (2020-12-01). "As the Worlds Turn: Constraining Spin Evolution in the Planetary-mass Regime". The Astrophysical Journal. 905 (1): 37. arXiv:2010.07315. Bibcode:2020ApJ...905...37B. doi:10.3847/1538-4357/abc0ef. ISSN 0004-637X.
