HD 36112
File:ALMA spies a new planetary nursery HD 36112.jpg HD 36112 and the surrounding dusty disk. The rings in the disk were measured as being elliptical in shape rather than being perfectly circular. Credit: ESO/R. Dong et al.; ALMA (ESO/NAOJ/NRAO) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus[1] |
| Right ascension | 05h 30m 27.52856s[2] |
| Declination | +25° 19′ 57.0763″[2] |
| Apparent magnitude (V) | 8.27[3] |
| Characteristics | |
| Evolutionary stage | pre main sequence[4] |
| Spectral type | A8Ve[5] |
| Astrometry | |
| Proper motion (μ) | RA: 3.685(33) mas/yr[2] Dec.: −26.373(22) mas/yr[2] |
| Parallax (π) | 6.4157±0.0314 mas[2] |
| Distance | 508 ± 2 ly (155.9 ± 0.8 pc) |
| Details | |
| Mass | 1.6[6] M☉ |
| Radius | 2.0[7] R☉ |
| Luminosity | 10[6] L☉ |
| Surface gravity (log g) | 4.05[7] cgs |
| Temperature | 7,600[6] K |
| Metallicity [Fe/H] | 0.10[8] dex |
| Age | 8.0[6] Myr |
| Other designations | |
| MWC 758, BD+25 843, HIP 25793, 2MASS J05302753+2519571, IRAS 05273+2517 | |
| Database references | |
| SIMBAD | data |
HD 36112, also known as MWC 758, is a young Herbig Ae star located in the constellation Taurus, surrounded by irregular rings of cosmic dust. The system is about 3.5 million years old. The disk has a cavity at 50 astronomical units and two spiral arms at 30–75 au that are seen in near-infrared scattered light, but only one spiral arm is seen in ALMA images.[9][4]
The inner cavity was shown to be elliptical and not perfectly circular. This is not a projection effect but represents the shape of the cavity, with an eccentricity e ≈ 0.1 after the deprojection of the disk.[4]
A 2018 study detected a possible exoplanet at a distance of about 20 au, designated MWC 758 b,[11] and the observations with ALMA have also shown evidence of an unseen planet at 100 au.[4] A study in 2019 came to the conclusion that a 1.5 MJ planet at 35 au and a 5 MJ planet at 140 au could explain the features seen with ALMA and the VLA.[12]
In another 2019 study, a possible exoplanet or disk feature was detected with the Large Binocular Telescope, referred to as MWC 758 CC1 (Companion Candidate 1), with a non-detection of MWC 758 b.[13] However, another study in 2021 failed to detect either of the point sources found in earlier studies.[14] A 2023 study found further evidence for MWC 758 CC1, now designated MWC 758 c, orbiting at a distance of approximately 100 au.[15]
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). XHIP record for this object at VizieR.
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
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- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
