HD 106515 is a binary star (and currently visual triple system) in the constellation of Virgo.

The A and B stars are both K-type main-sequence stars, both somewhat smaller and cooler than the Sun. The two are gravitationally bound and separated at 310 AU. The binary semimajor axis is 390 AU.[5]

The third star in the visual triple, BD−06°3533, is a physically unrelated background star.[2]

Properties

HD 106515 AB is a wide binary system which was first observed by Jérôme de Lalande in 1795.[2]

The discovery of HD 106515 Ab was announced in a preprint submitted on September 12, 2011.[11] The discovery was made using radial velocity measurements obtained at the CORALIE spectrograph located at La Silla Observatory.[5] Confirmation of the discovery was made by a separate team using the Galileo National Telescope at the Roque de los Muchachos Observatory on the island of La Palma in the Canary Islands, Spain.[12] Initially announced as an exoplanet,[11] astrometric observations in 2021 have found that the true mass is significantly higher than its minimum mass predicted from radial velocity, so it is likely a brown dwarf.[13] A 2022 study found a true mass closer to the minimum mass, but the parameters are less well constrained.[14]

The HD 106515 A planetary system[13]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 18.9+1.5
−1.4 MJ 		4.48±0.050 9.927+0.030
−0.032 		0.571±0.012 29.2+2.4
−2.2° 		—

References

  1. ^ 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.
  2. ^ a b c d e f g Rica, F. M.; et al. (2017). "Dynamical Study of the Exoplanet Host Binary System HD 106515". Publications of the Astronomical Society of Australia. 34. e004. Bibcode:2017PASA...34....4R. doi:10.1017/pasa.2016.59.
  3. ^ a b c d e f g 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.
  4. ^ a b Desidera, S.; et al. (2006). "Spectroscopic characterization of a sample of southern visual binaries". Astronomy and Astrophysics. 454 (2): 553–558. Bibcode:2006A&A...454..553D. doi:10.1051/0004-6361:20064895.
  5. ^ a b c Marmier, M.; et al. (2013). "The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets". Astronomy and Astrophysics. 551. A90. arXiv:1211.6444. Bibcode:2013A&A...551A..90M. doi:10.1051/0004-6361/201219639.
  6. ^ Saffe, C.; et al. (2019). "High-precision analysis of binary stars with planets. I. Searching for condensation temperature trends in the HD 106515 system". Astronomy and Astrophysics. 625. A39. arXiv:1904.01955. Bibcode:2019A&A...625A..39S. doi:10.1051/0004-6361/201935352. S2CID 102484807.
  7. ^ a b Sissa, E.; Gratton, R.; Desidera, S.; Martinez Fiorenzano, A. F.; Bonfanti, A.; Carolo, E.; Vassallo, D.; Claudi, R. U.; Endl, M.; Cosentino, R. (2016). "Hα-activity and ages for stars in the SARG survey". Astronomy and Astrophysics. 596: A76. arXiv:1609.04660. Bibcode:2016A&A...596A..76S. doi:10.1051/0004-6361/201628531. S2CID 54202186.
  8. ^ "HD 106515". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  9. ^ "HD 106515A". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  10. ^ "HD 106515B". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-07.
  11. ^ a b Mayor, M.; et al. (September 12, 2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets". arXiv:1109.2497 [astro-ph].
  12. ^ Desidera, S.; et al. (2012). "A long-period massive planet around HD 106515A". Astronomy and Astrophysics. 546. A108. arXiv:1208.3963. Bibcode:2012A&A...546A.108D. doi:10.1051/0004-6361/201220038.
  13. ^ a b Li, Yiting; Brandt, Timothy D.; Brandt, G. Mirek; Dupuy, Trent J.; Michalik, Daniel; Jensen-Clem, Rebecca; Zeng, Yunlin; Faherty, Jacqueline; Mitra, Elena L. (2021). "Precise Masses and Orbits for Nine Radial-velocity Exoplanets". The Astronomical Journal. 162 (6): 266. arXiv:2109.10422. Bibcode:2021AJ....162..266L. doi:10.3847/1538-3881/ac27ab. S2CID 237592581.
  14. ^ 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.