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Resolved millimeter-dust continuum cavity around the very low mass young star CIDA 1
Item metadata
dc.contributor.author | Pinilla, Paola | |
dc.contributor.author | Natta, Antonella | |
dc.contributor.author | Manara, Carlo F. | |
dc.contributor.author | Ricci, Luca | |
dc.contributor.author | Scholz, Aleks | |
dc.contributor.author | Testi, Leonardo | |
dc.date.accessioned | 2018-07-05T12:30:07Z | |
dc.date.available | 2018-07-05T12:30:07Z | |
dc.date.issued | 2018-07-01 | |
dc.identifier | 253378804 | |
dc.identifier | 08913cd2-4c0b-4dff-bf73-b2d2ef5e1174 | |
dc.identifier | 85060772230 | |
dc.identifier | 000439526600004 | |
dc.identifier.citation | Pinilla , P , Natta , A , Manara , C F , Ricci , L , Scholz , A & Testi , L 2018 , ' Resolved millimeter-dust continuum cavity around the very low mass young star CIDA 1 ' , Astronomy & Astrophysics , vol. 615 . https://doi.org/10.1051/0004-6361/201832690 | en |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | BibCode: 2018arXiv180500960P | |
dc.identifier.other | BibCode: 2018A&A...615A..95P | |
dc.identifier.uri | https://hdl.handle.net/10023/14988 | |
dc.description | Funding: ERC grant 743029 EASY. | en |
dc.description.abstract | Context. Transition disks (TDs) are circumstellar disks with inner regions highly depleted in dust. TDs are observed in a small fraction of disk-bearing objects at ages of 1-10 Myr. They are important laboratories to study evolutionary effects in disks, from photoevaporation to planet-disk interactions. Aims. We report the discovery of a large inner dust-empty region in the disk around the very low mass star CIDA 1 (M* ~0.1-0.2 M⊙). Methods. We used ALMA continuum observations at 887 μm, which provide a spatial resolution of 0." 21 x 0." 12(~15x8 au in radius at 140pc). Results. The data show a dusty ring with a clear cavity of radius ~20 au, the typical characteristic of a TD. The emission in the ring is well described by a narrow Gaussian profile. The dust mass in the disk is ~17 M⊕. CIDA 1 is one of the lowest mass stars with a clearly detected millimeter cavity. When compared to objects of similar stellar mass, it has a relatively massive dusty disk (less than ~5% of Taurus Class II disks in Taurus have a ratio of Mdisk/M* larger than CIDA 1) and a very high mass accretion rate (CIDA 1 is a disk with one of the lowest values of Mdisk/M ever observed). In light of these unusual parameters, we discuss a number of possible mechanisms that can be responsible for the formation of the dust cavity (e.g.,photoevaporation, dead zones, embedded planets, close binary). We find that an embedded planet of a Saturn mass or a close binary are the most likely possibilities. | |
dc.format.extent | 1347199 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | en |
dc.subject | Accretion | en |
dc.subject | Accretion disk | en |
dc.subject | Circumstellar matter | en |
dc.subject | Stars: premain-sequence-protoplanetary-disk-formation | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | Resolved millimeter-dust continuum cavity around the very low mass young star CIDA 1 | en |
dc.type | Journal article | 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 | 10.1051/0004-6361/201832690 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/1805.00960 | en |
dc.identifier.grantnumber | ST/M001296/1 | en |
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