Astronomy:HD 95086

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Short description: Star in the constellation Carina
HD 95086 / Aiolos
Observation data
Equinox J2000.0]] (ICRS)
Constellation Carina
Right ascension  10h 57m 03.02157s[1]
Declination −68° 40′ 02.4492″[1]
Apparent magnitude (V) 7.36
Characteristics
Evolutionary stage Pre-main-sequence star[2]
Spectral type A8[3]
Astrometry
Radial velocity (Rv)18.04±0.16[1] km/s
Proper motion (μ) RA: −41.128[1] mas/yr
Dec.: 12.861[1] mas/yr
Parallax (π)11.5659 ± 0.0187[1] mas
Distance282.0 ± 0.5 ly
(86.5 ± 0.1 pc)
Details[3]
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[4] Myr
Other designations
Aiolos, CD−68 847, Gaia DR2 5231963962676292224, HD 95086, HIP 53524, TYC 9212-4675-1, GSC 09212-04675, 2MASS J10570301-6840023[5]
Database references
SIMBADdata

HD 95086 is a pre-main-sequence star[2] about 282 light-years (86 parsecs) away. Its surface temperature is 7,750±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.[4] 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.[4]

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

Nomenclature

The designation HD 95086 comes from the Henry Draper Catalogue.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.[7] The approved names, proposed by a team from Greece, were announced in June 2023. HD 95086 is named Aiolos after a Greek mythological figure, and its planet is named Levantes, from a modern Greek word referring to easterly Mediterranean winds.[8]

Planetary system

In 2013, one planet, named HD 95086 b, was discovered on a wide orbit by direct imaging.[9] The discovery was confirmed in 2014.[10]

Besides the planet, the star is surrounded by a complex, relatively massive (0.5±0.2 M⊕) debris disk, which may consist of up to four belts (Hot, Warm, Cold and Halo) separated by gaps.[3] A small amount (1.4–13)×10−6 M⊕ of gaseous carbon monoxide was detected in the outer disk, implying a recent collisional cascade followed by cometary activity of fresh debris.[11]

The HD 95086 planetary system[12]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
Warm debris disk 7–10[3] AU — —
b / Levantes 4.5±0.5 MJ 51.45±4.66 70.98±55.01 0.16±0.09 106±49° —
Cold debris disk 106–320[3] AU 90±3[3]° —

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Meshkat, T.; Bailey, V.; Rameau, J.; Bonnefoy, M.; Boccaletti, A.; Mamajek, E. E.; Kenworthy, M.; Chauvin, G. et al. (October 2013). "Further Evidence of the Planetary Nature of HD 95086 b from Gemini/NICI H-band Data". The Astrophysical Journal Letters 775 (2). doi:10.1088/2041-8205/775/2/L40. L40. Bibcode: 2013ApJ...775L..40M. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Chauvin, G.; Gratton, R.; Bonnefoy, M.; Lagrange, A. -M.; de Boer, J.; Vigan, A.; Beust, H.; Lazzoni, C. et al. (2018), Investigating the young Solar System analog HD 95086 A combined HARPS and SPHERE exploration 
  4. ↑ 4.0 4.1 4.2 Desgrange, C. et al. (2022). "In-depth direct imaging and spectroscopic characterization of the young Solar System analog HD 95086". Astronomy & Astrophysics 664: A139. doi:10.1051/0004-6361/202243097. 
  5. ↑ "HD 95086". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+95086. 
  6. ↑ De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I. et al. (2013), "The VAST Survey – III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society 437 (2): 1216–1240, doi:10.1093/mnras/stt1932, Bibcode: 2014MNRAS.437.1216D 
  7. ↑ "List of ExoWorlds 2022". IAU. 8 August 2022. https://www.nameexoworlds.iau.org/2022exoworlds. 
  8. ↑ "2022 Approved Names". IAU. https://www.nameexoworlds.iau.org/2022approved-names. 
  9. ↑ Rameau, J.; Chauvin, G.; Lagrange, A.-M.; Boccaletti, A.; Quanz, S. P.; Bonnefoy, M.; Girard, J. H.; Delorme, P. et al. (2013), "Discovery of a probable 4 − 5 Jupiter-mass exoplanet to HD 95086 by direct-imaging", The Astrophysical Journal 772 (2): L15, doi:10.1088/2041-8205/772/2/L15, Bibcode: 2013ApJ...772L..15R 
  10. ↑ Galicher, Raphael; Rameau, Julien; Bonnefoy, Mickael; Baudino, Jean-Loup; Currie, Thayne; Boccaletti, Anthony; Chauvin, Gael; Lagrange, Anne-Marie et al. (2014), "Near-infrared detection and characterization of the exoplanet HD 95086 b with the Gemini Planet Imager", Astronomy and Astrophysics 565: L4, doi:10.1051/0004-6361/201423839, Bibcode: 2014A&A...565L...4G 
  11. ↑ Booth, Mark; Matrà, Luca; Su, Kate Y L.; Kral, Quentin; Hales, Antonio S.; Dent, William R F.; Hughes, A Meredith; MacGregor, Meredith A. et al. (2019), "Deep ALMA Search for CO Gas in the HD 95086 Debris Disc", Monthly Notices of the Royal Astronomical Society 482 (3): 3443–3452, doi:10.1093/mnras/sty2993 
  12. ↑ Le Coroller, H.; Nowak, M.; Delorme, P.; Chauvin, G.; Gratton, R.; Devinat, M.; Bec-Canet, J.; Schneeberger, A. 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, doi:10.1051/0004-6361/202037605, Bibcode: 2020A&A...639A.113L 

Coordinates: Sky map 10h 57m 03.0216s, −68° 40′ 02.4469″



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