HD 106515

Last updated
HD 106515
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Virgo
HD 106515 A
Right ascension 12h 15m 06.5667s [1]
Declination –07° 15′ 26.353″ [1]
Apparent magnitude (V)+7.99 [2]
HD 106515 B
Right ascension 12h 15m 06.1003s [3]
Declination –07° 15′ 26.587″ [3]
Apparent magnitude (V)+8.25 [2]
Characteristics
HD 106515 A
Spectral type K0 V [2]
HD 106515 B
Spectral type K1 V [2]
Astrometry
HD 106515 A
Radial velocity (Rv)20.66±0.11 [4]  km/s
Proper motion (μ)RA: −251.469 [1]   mas/yr
Dec.: −51.330 [1]   mas/yr
Parallax (π)29.3148 ± 0.0297  mas [1]
Distance 111.3 ± 0.1  ly
(34.11 ± 0.03  pc)
HD 106515 B
Radial velocity (Rv)19.94±0.11 [4]  km/s
Proper motion (μ)RA: −244.603 [3]   mas/yr
Dec.: −67.744 [3]   mas/yr
Parallax (π)29.3908 ± 0.0294  mas [3]
Distance 111.0 ± 0.1  ly
(34.02 ± 0.03  pc)
Absolute magnitude  (MV)4.62 [5]
Orbit [2]
PrimaryHD 106515 A
CompanionHD 106515 B
Period (P)4802.1+2397
−1141 yr
Semi-major axis (a)9.822+2.688
−1.329"
(345+95
−47  AU )
Eccentricity (e)0.420+0.106
−0.104
Inclination (i)164.45+3.5
−11.3°
Longitude of the node (Ω)92.06+45.08
−2.67°
Periastron epoch (T)2376.4+44.4
−78.9
Argument of periastron (ω)
(secondary)		250.50+38.22
−14.07°
Details [6]
HD 106515 A
Mass 0.888±0.018  M☉
Radius 0.910±0.009  R☉
Luminosity 0.68±0.05 [3]   L☉
Surface gravity (log g)4.39±0.18  cgs
Temperature 5364±57  K
Metallicity [Fe/H]+0.016±0.009  dex
Rotational velocity (v sin i)1.7 [7]  km/s
Age 9.233±2.133  Gyr
HD 106515 B
Mass 0.861±0.015  M☉
Radius 0.865±0.015  R☉
Luminosity0.55±0.05 [3]   L☉
Surface gravity (log g)4.30±0.20  cgs
Temperature 5190±58  K
Metallicity [Fe/H]+0.022±0.010  dex
Rotational velocity (v sin i)1.8 [7]  km/s
Age 9.155±2.199  Gyr
Other designations
BD−06°3532, HIP  59743, ADS  8477 AB, WDS J12151-0715AB [8]
HD 106515 A: Gaia DR2  3584074380866605440, SAO  138673, LTT  4599, 2MASS J12150658-0715263 [9]
HD 106515 B: Gaia DR2  3584074376569429248, SAO  138674, LTT  4598, 2MASS J12150611-0715265 [10]
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia 		data

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
b18.9+1.5
−1.4  MJ 		4.48±0.0509.927+0.030
−0.032		0.571±0.01229.2+2.4
−2.2 ° 		—

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References

  1. 1 2 3 4 5 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics . arXiv: 2208.00211 . doi: 10.1051/0004-6361/202243940 . Gaia DR3 record for this source at VizieR.
  2. 1 2 3 4 5 6 7 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. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics . arXiv: 2208.00211 . doi: 10.1051/0004-6361/202243940 . Gaia DR3 record for this source at VizieR.
  4. 1 2 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. 1 2 3 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. 1 2 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. 1 2 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. 1 2 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). arXiv: 2208.12720 . Bibcode:2022arXiv220812720F. doi:10.3847/1538-4365/ac7e57.
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