HD 95086, formally named Aiolos,[7] is a pre-main-sequence star[3] 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.[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]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 57m 03.02157s[2] |
| Declination | −68° 40′ 02.4492″[2] |
| Apparent magnitude (V) | 7.36 |
| Characteristics | |
| Evolutionary stage | Pre-main-sequence star[3] |
| Spectral type | A8[4] |
| Astrometry | |
| Radial velocity (Rv) | 18.04±0.16[2] km/s |
| Proper motion (μ) | RA: −41.128 mas/yr[2] Dec.: 12.861 mas/yr[2] |
| Parallax (π) | 11.5659 ± 0.0187 mas[2] |
| Distance | 282.0 ± 0.5 ly (86.5 ± 0.1 pc) |
| Details[4] | |
| 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[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Multiplicity surveys did not detect any stellar companions to HD 95086 as of 2013.[8]
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.[9] 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.[7]
Planetary system
In 2013, one planet, named HD 95086 b, was discovered on a wide orbit by direct imaging.[10] The discovery was confirmed in 2014.[11]
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.[4] 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.[12]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| Warm debris disk | 7–10[4] 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[4] AU | 90±3[4]° | — | |||
References
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