HD 95086
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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas/yr[1] Dec.: 12.861 mas/yr[1] |
| Parallax (π) | 11.5659 ± 0.0187 mas[1] |
| Distance | 282.0 ± 0.5 ly (86.5 ± 0.1 pc) |
| Details[3] | |
| Mass | 1.6±0.1 M☉ |
| Luminosity | 5.7±1.7 L☉ |
| Surface gravity (log g) | 4.0±0.5 cgs |
| Temperature | 7750±250 K |
| Metallicity [Fe/H] | −0.25±0.5 dex |
| Rotational velocity (v sin i) | 20 ± 10 km/s |
| Age | 13.3+1.1 −0.6[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Multiplicity surveys did not detect any stellar companions to HD 95086 as of 2013.[6]
Nomenclature edit
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 edit
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 ME) 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 ME of gaseous carbon monoxide was detected in the outer disk, implying a recent collisional cascade followed by cometary activity of fresh debris.[11]
| 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 edit
- ^ 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.
- ^ a b Meshkat, T.; Bailey, V.; Rameau, J.; Bonnefoy, M.; Boccaletti, A.; Mamajek, E. E.; Kenworthy, M.; Chauvin, G.; Lagrange, A. -M.; Su, K. Y. L.; Currie, T. (October 2013). "Further Evidence of the Planetary Nature of HD 95086 b from Gemini/NICI H-band Data". The Astrophysical Journal Letters. 775 (2): L40. arXiv:1309.0543. Bibcode:2013ApJ...775L..40M. doi:10.1088/2041-8205/775/2/L40. L40.
- ^ a b c d e f 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
- ^ a b c 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.
- ^ "HD 95086". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-15.
- ^ 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", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932
- ^ "List of ExoWorlds 2022". nameexoworlds.iau.org. IAU. 8 August 2022. Retrieved 27 August 2022.
- ^ "2022 Approved Names". nameexoworlds.iau.org. IAU. Retrieved 7 June 2023.
- ^ 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
- ^ 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
- ^ 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
- ^ 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