ROXs 12
ROXs 12 is a binary system of pre-main-sequence stars. It belongs to the Rho Ophiuchi cloud complex. The surface temperature of the primary star is 3900±100 K. ROXs 12 is much younger than the Sun with an age of 7.6
−2.5 million years.
−2.5 million years.
A multiplicity survey detected a stellar companion to ROXs 12 in 2017, named 2MASS J16262774–2527247, at a projected separation of 5100 AU.
Planetary system
In 2005, one planet was discovered on a wide orbit by direct imaging, was confirmed in 2013 and named ROXs 12 b. The planet's measured temperature is 3100
−500 K.
The primary star is surrounded by a protoplanetary disk, although it is not very massive, being less than 4 MJ. The secondary star also has a protoplanetary disk, and it is much more massive, equal to 10
−0.87M☉. The disk is inclined to the equatorial plane of the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Protoplanetary or debris disk | ? AU | — | — | |||
| b | 16±4 MJ | 210±20 | — | ~0 | — | — |
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Protoplanetary disk | 4.1–25.8 AU | — | — | |||
References
- ^ "ROXs 12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-18.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ Bowler, Brendan P.; Kraus, Adam L.; Bryan, Marta L.; Knutson, Heather A.; Brogi, Matteo; Rizzuto, Aaron C.; Mace, Gregory N.; Vanderburg, Andrew; Liu, Michael C.; Hillenbrand, Lynne A.; Cieza, Lucas A. (2017), "The young substellar companion ROXs 12 B: near-infrared spectrum, system architecture, and spin-orbit misalignment", The Astronomical Journal, 154 (4): 165, arXiv:1708.07611, Bibcode:2017AJ....154..165B, doi:10.3847/1538-3881/aa88bd, S2CID 119187671
- ^ Kraus, Adam L.; Ireland, Michael J.; Cieza, Lucas A.; Hinkley, Sasha; Dupuy, Trent J.; Bowler, Brendan P.; Liu, Michael C. (2013), "Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B", The Astrophysical Journal, 781 (1): 20, arXiv:1311.7664, Bibcode:2014ApJ...781...20K, doi:10.1088/0004-637X/781/1/20, S2CID 41086512
- ^ Sheehan, Patrick D.; Wu, Ya-Lin; Eisner, Josh A.; Tobin, John J. (2019), "High Precision Dynamical Masses of Pre-Main Sequence Stars with ALMA and Gaia", The Astrophysical Journal, 874 (2): 136, arXiv:1903.00032, Bibcode:2019ApJ...874..136S, doi:10.3847/1538-4357/ab09f9, S2CID 119218828
- ^ Wu, Ya-Lin; Bowler, Brendan P.; Sheehan, Patrick D.; Andrews, Sean M.; Herczeg, Gregory J.; Kraus, Adam L.; Ricci, Luca; Wilner, David J.; Zhu, Zhaohuan (2020), "ALMA 0.88 mm survey of disks around planetary-mass companions", The Astronomical Journal, 159 (5): 229, arXiv:2003.08658, Bibcode:2020AJ....159..229W, doi:10.3847/1538-3881/ab818c, S2CID 213004809
- ^ Ratzka, T.; Köhler, R.; Leinert, Ch. (2005), "A Multiplicity Survey of the Rho Ophiuchi Molecular Clouds", Astronomy & Astrophysics, 437 (2): 611–626, arXiv:astro-ph/0504593, Bibcode:2005A&A...437..611R, doi:10.1051/0004-6361:20042107, S2CID 119464112
