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HD 95086 is a pre-main-sequence star.[citation needed] Its surface temperature is 7750±250 K. HD 95086 is somewhat metal-deficient in comparison to the Sun, with a metallicity Fe/H index of −0.25±0.5 (~55%), and is much younger at an age of 13.3 million years.[5] It was originally thought to be part of the Lower Centaurus-Crux association, until it was found using Gaia data that the star may be instead part of the Carina association.[5]

HD 95086
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 10h 57m 03.0216s[1]
Declination −68° 40′ 02.4469″[1]
Apparent magnitude (V) 7.36
Characteristics
Evolutionary stage Pre-main-sequence star[citation needed]
Spectral type A8[2]
Astrometry
Radial velocity (Rv)8.5±0.2[3] km/s
Proper motion (μ) RA: -41.128[4] mas/yr
Dec.: 12.861[4] mas/yr
Parallax (π)11.5659 ± 0.02187 mas[4]
Distance282.0 ± 0.5 ly
(86.5 ± 0.2 pc)
Details[2]
Mass1.6±0.1 M☉
Luminosity5.7±1.7 L☉
Surface gravity (log g)4.0±0.5 cgs
Temperature7750±250 K
Metallicity [Fe/H]−0.25±0.5 dex
Rotational velocity (v sin i)20 ± 10 km/s
Age13.3+1.1
−0.6[5] Myr
Other designations
CD−68 847, Gaia DR2 5231963962676292224, HIP 53524, TYC 9212-4675-1, GSC 09212-04675, 2MASS J10570301-6840023[1]
Database references
SIMBADdata

Multiplicity surveys did not detect any stellar companions to HD 95086 as of 2013.[6]


Planetary system


In 2013, one planet, named HD 95086 b, was discovered on a wide orbit by direct imaging.[7] The discovery was confirmed in 2014.[8]

Besides the planet, the star is surrounded by a complex, relatively massive (0.5±0.2 MEarth) debris disk, which may consist of up to four belts (Hot, Warm, Cold and Halo) separated by gaps.[2] A small amount (1.4–13)×10−6 MEarth of gaseous carbon monoxide was detected in the outer disk, implying a recent collisional cascade followed by cometary activity of fresh debris.[3]

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.[9]

The HD 95086 planetary system[10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
Warm debris disk 7–10[2] AU — —
b 4.5±0.5 MJ 51.45±4.66 70.98±55.01 0.16±0.09 106±49° —
Cold debris disk 106–320[2] AU 90±3[2]° —

References


  1. "HD 95086". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-15.
  2. Chauvin, G.; Gratton, R.; Bonnefoy, M.; Lagrange, A. -M.; de Boer, J.; Vigan, A.; Beust, H.; Lazzoni, C.; Boccaletti, A.; Galicher, R.; Desidera, S.; Delorme, P.; Keppler, M.; Lannier, J.; Maire, A. -L.; Mesa, D.; Meunier, N.; Kral, Q.; Henning, T.; Menard, F.; Moor, A.; Avenhaus, H.; Bazzon, A.; Janson, M.; Beuzit, J. -L.; Bhowmik, T.; Bonavita, M.; Borgniet, S.; Brandner, W.; et al. (2018), Investigating the young Solar System analog HD 95086 A combined HARPS and SPHERE exploration, arXiv:1801.05850
  3. Booth, Mark; Matrà, Luca; Su, Kate Y L.; Kral, Quentin; Hales, Antonio S.; Dent, William R F.; Hughes, A Meredith; MacGregor, Meredith A.; Löhne, Torsten; Wilner, David J. (2019), "Deep ALMA Search for CO Gas in the HD 95086 Debris Disc", Monthly Notices of the Royal Astronomical Society, 482 (3): 3443–3452, arXiv:1811.00412, doi:10.1093/mnras/sty2993
  4. 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.
  5. Desgrange, C.; et al. (2022). "In-depth direct imaging and spectroscopic characterization of the young Solar System analog HD 95086". Astronomy & Astrophysics. 664: A139. arXiv:2206.00425. doi:10.1051/0004-6361/202243097. S2CID 248874069.
  6. De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; Macintosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (2013), The VAST Survey – III. The multiplicity of A-type stars within 75 pc, arXiv:1311.7141, doi:10.1093/mnras/stt1932
  7. Rameau, J.; Chauvin, G.; Lagrange, A.-M.; Boccaletti, A.; Quanz, S. P.; Bonnefoy, M.; Girard, J. H.; Delorme, P.; Desidera, S.; Klahr, H.; Mordasini, C.; Dumas, C.; Bonavita, M.; Meshkat, T.; Bailey, V.; Kenworthy, M. (2013), "Discovery of a probable 4 − 5 Jupiter-mass exoplanet to HD 95086 by direct-imaging", The Astrophysical Journal, 772 (2): L15, arXiv:1305.7428, Bibcode:2013ApJ...772L..15R, doi:10.1088/2041-8205/772/2/L15, S2CID 56062429
  8. Galicher, Raphael; Rameau, Julien; Bonnefoy, Mickael; Baudino, Jean-Loup; Currie, Thayne; Boccaletti, Anthony; Chauvin, Gael; Lagrange, Anne-Marie; Marois, Christian (2014), "Near-infrared detection and characterization of the exoplanet HD 95086 b with the Gemini Planet Imager", Astronomy and Astrophysics, 565: L4, arXiv:1404.4635, Bibcode:2014A&A...565L...4G, doi:10.1051/0004-6361/201423839, S2CID 55041736
  9. "List of ExoWorlds 2022". nameexoworlds.iau.org. IAU. 8 August 2022. Retrieved 27 August 2022.
  10. Le Coroller, H.; Nowak, M.; Delorme, P.; Chauvin, G.; Gratton, R.; Devinat, M.; Bec-Canet, J.; Schneeberger, A.; Estevez, D.; Arnold, L.; Beust, H.; Bonnefoy, M.; Boccaletti, A.; Desgrange, C.; Desidera, S.; Galicher, R.; Lagrange, A. M.; Langlois, M.; Maire, A. L.; Menard, F.; Vernazza, P.; Vigan, A.; Zurlo, A.; Fenouillet, T.; Lambert, J. C.; Bonavita, M.; Cheetham, A.; Dorazi, V.; Feldt, M.; et al. (2020), "K-Stacker, an algorithm to hack the orbital parameters of planets hidden in high-contrast imaging First applications to VLT/SPHERE multi-epoch observations", Astronomy & Astrophysics, A113: 639, arXiv:2004.12878, Bibcode:2020A&A...639A.113L, doi:10.1051/0004-6361/202037605, S2CID 216553439



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