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G11.92-0.61 MM 1 : a fragmented Keplerian disk surrounding a proto-O star
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dc.contributor.author | Ilee, J. D. | |
dc.contributor.author | Cyganowski, C. J. | |
dc.contributor.author | Brogan, C. L. | |
dc.contributor.author | Hunter, T. R. | |
dc.contributor.author | Forgan, D. H. | |
dc.contributor.author | Haworth, T. J. | |
dc.contributor.author | Clarke, C. J. | |
dc.contributor.author | Harries, T. J. | |
dc.date.accessioned | 2019-01-08T10:30:05Z | |
dc.date.available | 2019-01-08T10:30:05Z | |
dc.date.issued | 2018-12-14 | |
dc.identifier | 257260446 | |
dc.identifier | 2ca3ffa7-508e-4a89-bc58-290a75e89b8b | |
dc.identifier | 000453859800001 | |
dc.identifier | 85059862247 | |
dc.identifier | 000453859800001 | |
dc.identifier.citation | Ilee , J D , Cyganowski , C J , Brogan , C L , Hunter , T R , Forgan , D H , Haworth , T J , Clarke , C J & Harries , T J 2018 , ' G11.92-0.61 MM 1 : a fragmented Keplerian disk surrounding a proto-O star ' , Astrophysical Journal Letters , vol. 869 , no. 2 , L24 . https://doi.org/10.3847/2041-8213/aaeffc | en |
dc.identifier.issn | 2041-8205 | |
dc.identifier.uri | https://hdl.handle.net/10023/16796 | |
dc.description | J.D.I. is funded by the STFC (ST/R000549/1), and J.D.I. and C.J. Clarke are funded by the DISCSIM project, grant agreement 341137 (ERC-2013-ADG). C.J. Cyganowski is funded by the STFC (ST/M001296/1). D.H.F. is funded by the ECOGAL project, grant agreement 291227 (ERC-2011-ADG). T.J. Haworth is funded by an Imperial College Junior Research Fellowship. T.J. Harries is funded by the STFC (ST/M00127X/1). | en |
dc.description.abstract | We present high-resolution (~300 au) Atacama Large Millimeter/submillimeter Array observations of the massive young stellar object G11.92–0.61 MM 1. We resolve the immediate circumstellar environment of MM 1 in 1.3 mm continuum emission and CH3CN emission for the first time. The object divides into two main sources—MM 1a, which is the source of a bipolar molecular outflow, and MM 1b, located 0."57 (1920 au) to the southeast. The main component of MM 1a is an elongated continuum structure, perpendicular to the bipolar outflow, with a size of 0."141 × 0."050 (480 × 170 au). The gas kinematics toward MM 1a probed via CH3CN trace a variety of scales. The lower energy J = 12–11 K = 3 line traces extended, rotating gas within the outflow cavity, while the v8 = 1 line shows a clearly resolved Keplerian rotation signature. Analysis of the gas kinematics and dust emission shows that the total enclosed mass in MM 1a is 40 ± 5 M ⊙ (where between 2.2 and 5.8 M ⊙ is attributed to the disk), while MM 1b is <0.6 M ⊙. The extreme mass ratio and orbital properties of MM 1a and MM 1b suggest that MM 1b is one of the first observed examples of the formation of a binary star via disk fragmentation around a massive young (proto)star. | |
dc.format.extent | 6 | |
dc.format.extent | 1753464 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal Letters | en |
dc.subject | Accretion, accretion disks | en |
dc.subject | ISM: individual objects (G11.92-0.61) | en |
dc.subject | Stars: formation | en |
dc.subject | Stars: protostars | en |
dc.subject | Submillimeter: ISM | en |
dc.subject | Systems | en |
dc.subject | QB Astronomy | en |
dc.subject | Astronomy and Astrophysics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.title | G11.92-0.61 MM 1 : a fragmented Keplerian disk surrounding a proto-O star | en |
dc.type | Journal article | en |
dc.contributor.sponsor | European Research Council | en |
dc.contributor.sponsor | Science & Technology Facilities Council | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | 10.3847/2041-8213/aaeffc | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/1811.05267 | en |
dc.identifier.grantnumber | en | |
dc.identifier.grantnumber | ST/M001296/1 | en |
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