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From Wikipedia, the free encyclopedia

HD 36112

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]
Distance508 ± 2 ly
(155.9 ± 0.8 pc)
Other designations
MWC 758, BD+25 843, HIP 25793, 2MASS J05302753+2519571, IRAS 05273+2517
Database references
SIMBADdata

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]

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Transcription

References

  1. ^ a b c d 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.
  2. ^ Vieira, S. L. A; Corradi, W. J. B; Alencar, S. H. P; Mendes, L. T. S; Torres, C. A. O; Quast, G. R; Guimares, M. M; Da Silva, L (2003). "Investigation of 131 Herbig Ae/Be Candidate Stars". The Astronomical Journal. 126 (6): 2971. Bibcode:2003AJ....126.2971V. doi:10.1086/379553.
  3. ^ "ALMA spies a new planetary nursery". www.eso.org. Retrieved 2 July 2018.
  4. ^ a b c Dong, Ruobing; Liu, Sheng-yuan; Eisner, Josh; Andrews, Sean; Fung, Jeffrey; Zhu, Zhaohuan; Chiang, Eugene; Hashimoto, Jun; Liu, Hauyu Baobab; Casassus, Simon; Esposito, Thomas (June 2018). "The Eccentric Cavity, Triple Rings, Two-armed Spirals, and Double Clumps of the MWC 758 Disk". Astrophysical Journal. 860 (2): 124. arXiv:1805.12141. Bibcode:2018ApJ...860..124D. doi:10.3847/1538-4357/aac6cb. ISSN 0004-637X.
  5. ^ Reggiani, M.; Christiaens, V.; et al. (March 2018). "Discovery of a point-like source and a third spiral arm in the transition disk around the Herbig Ae star MWC 758". Astronomy & Astrophysics. 611: A74. arXiv:1710.11393. Bibcode:2018A&A...611A..74R. doi:10.1051/0004-6361/201732016. S2CID 73557538.
  6. ^ Baruteau, Clément; Barraza, Marcelo; Pérez, Sebastián; Casassus, Simon; Dong, Ruobing; Lyra, Wladimir; Marino, Sebastián; Christiaens, Valentin; Zhu, Zhaohuan; Carmona, Andrés; Debras, Florian (June 2019). "Dust traps in the protoplanetary disc MWC 758: two vortices produced by two giant planets?". MNRAS. 486 (1): 304–319. arXiv:1903.06537. Bibcode:2019MNRAS.486..304B. doi:10.1093/mnras/stz802. hdl:10150/633974. ISSN 0035-8711. S2CID 119356534.
  7. ^ Wagner, Kevin; Stone, Jordan M.; Spalding, Eckhart; Apai, Daniel; Dong, Ruobing; Ertel, Steve; Leisenring, Jarron; Webster, Ryan (September 2019). "Thermal Infrared Imaging of MWC 758 with the Large Binocular Telescope: Planetary-driven Spiral Arms?". Astrophysical Journal. 882 (1): 20. arXiv:1907.06655. Bibcode:2019ApJ...882...20W. doi:10.3847/1538-4357/ab32ea. hdl:10150/634582. ISSN 0004-637X. S2CID 196831464.
  8. ^ Boccaletti, A.; Pantin, E.; Ménard, F.; Galicher, R.; Langlois, M.; Benisty, M.; Gratton, R.; Chauvin, G.; Ginski, C.; Lagrange, A.-M.; Zurlo, A.; Biller, B.; Bonavita, M.; Bonnefoy, M.; Brown-Sevilla, S.; Cantalloube, F.; Desidera, S.; d'Orazi, V.; Feldt, M.; Hagelberg, J.; Lazzoni, C.; Mesa, D.; Meyer, M.; Perrot, C.; Vigan, A.; Sauvage, J.-F.; Ramos, J.; Rousset, G.; Magnard, Y. (2021). "Investigating point sources in MWC 758 with SPHERE". Astronomy & Astrophysics. 652: L8. arXiv:2107.07850. Bibcode:2021A&A...652L...8B. doi:10.1051/0004-6361/202141177. S2CID 236034288.
  9. ^ Wagner, Kevin; Stone, Jordan; et al. (July 2023). "Direct images and spectroscopy of a giant protoplanet driving spiral arms in MWC 758". Nature Astronomy. 7 (10): 1208–1217. arXiv:2307.04021. Bibcode:2023NatAs...7.1208W. doi:10.1038/s41550-023-02028-3. S2CID 259501395.
This page was last edited on 29 November 2023, at 07:31
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