![]() 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 |
Right ascension | 05h 30m 27.52856s [1] |
Declination | +25° 19′ 57.0763″ [1] |
Characteristics | |
Spectral type | A8Ve [2] |
Astrometry | |
Proper motion (μ) |
RA: 3.685(33)
mas/
yr
[1] Dec.: −26.373(22) mas/ yr [1] |
Parallax (π) | 6.4157 ± 0.0314 mas [1] |
Distance | 508 ± 2
ly (155.9 ± 0.8 pc) |
Other designations | |
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. [3] [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, [5] 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. [6]
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. [7] However, another study in 2021 failed to detect either of the point sources found in earlier studies. [8] A 2023 study found further evidence for MWC 758 CC1, now designated MWC 758 c, orbiting at a distance of approximately 100 au. [9]
![]() 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 |
Right ascension | 05h 30m 27.52856s [1] |
Declination | +25° 19′ 57.0763″ [1] |
Characteristics | |
Spectral type | A8Ve [2] |
Astrometry | |
Proper motion (μ) |
RA: 3.685(33)
mas/
yr
[1] Dec.: −26.373(22) mas/ yr [1] |
Parallax (π) | 6.4157 ± 0.0314 mas [1] |
Distance | 508 ± 2
ly (155.9 ± 0.8 pc) |
Other designations | |
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. [3] [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, [5] 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. [6]
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. [7] However, another study in 2021 failed to detect either of the point sources found in earlier studies. [8] A 2023 study found further evidence for MWC 758 CC1, now designated MWC 758 c, orbiting at a distance of approximately 100 au. [9]