A Surface Density Perturbation in the TW Hydrae Disk at 95 au Traced by Molecular Emission
| dc.contributor.author | TEAGUE, R. | |
| dc.contributor.author | SEMENOV, D. | |
| dc.contributor.author | GORTI, U. | |
| hal.structure.identifier | AMOR 2017 | |
| dc.contributor.author | GUILLOTEAU, S. | |
| hal.structure.identifier | Max-Planck-Institut für Astronomie [MPIA] | |
| dc.contributor.author | HENNING, Th. | |
| dc.contributor.author | BIRNSTIEL, T. | |
| hal.structure.identifier | AMOR 2017 | |
| dc.contributor.author | DUTREY, Anne | |
| hal.structure.identifier | Astronomical Institute Anton Pannekoek [AI PANNEKOEK] | |
| dc.contributor.author | VAN BOEKEL, R. | |
| hal.structure.identifier | AMOR 2017 | |
| dc.contributor.author | CHAPILLON, E. | |
| dc.date.issued | 2017-02 | |
| dc.identifier.issn | 2041-8205 | |
| dc.description.abstractEn | We present ALMA Cycle 2 observations at 0.″5 resolution of TW Hya of CS J=5-4 emission. The radial profile of the integrated line emission displays oscillatory features outward of 1.″5 (≈ 90 au). A dip-like feature at 1.″6 is coincident in location, depth, and width with features observed in dust scattered light at near-infrared wavelengths. Using a thermochemical model indicative of TW Hya, gas-grain chemical modeling, and non-LTE radiative transfer, we demonstrate that such a feature can be reproduced with a surface density depression, consistent with the modeling performed for scattered-light observations of TW Hya. We further demonstrate that a gap in the dust distribution and dust opacity only cannot reproduce the observed CS feature. The outer enhancement at 3.″1 is identified as a region of intensified desorption due to enhanced penetration of the interstellar far-UV radiation at the exponential edge of the disk surface density, which intensifies the photochemical processing of gas and ices. | |
| dc.language.iso | en | |
| dc.publisher | Bristol : IOP Publishing | |
| dc.subject.en | astrochemistry | |
| dc.subject.en | ISM: molecules | |
| dc.subject.en | protoplanetary disks | |
| dc.subject.en | techniques: interferometric | |
| dc.title.en | A Surface Density Perturbation in the TW Hydrae Disk at 95 au Traced by Molecular Emission | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3847/1538-4357/835/2/228 | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.identifier.arxiv | 1702.02147 | |
| bordeaux.journal | The Astrophysical journal letters | |
| bordeaux.page | id. 228 | |
| bordeaux.volume | 835 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01462872 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01462872v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20journal%20letters&rft.date=2017-02&rft.volume=835&rft.issue=2&rft.spage=id.%20228&rft.epage=id.%20228&rft.eissn=2041-8205&rft.issn=2041-8205&rft.au=TEAGUE,%20R.&SEMENOV,%20D.&GORTI,%20U.&GUILLOTEAU,%20S.&HENNING,%20Th.&rft.genre=article |
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