Temperature, Mass and Turbulence: A Spatially Resolved Multi-Band Non-LTE Analysis of CS in TW~Hya
| dc.contributor.author | TEAGUE, Richard | |
| hal.structure.identifier | Max-Planck-Institut für Astronomie [MPIA] | |
| dc.contributor.author | HENNING, Thomas | |
| hal.structure.identifier | AMOR 2018 | |
| dc.contributor.author | GUILLOTEAU, S. | |
| hal.structure.identifier | Harvard-Smithsonian Center for Astrophysics [CfA] | |
| dc.contributor.author | BERGIN, Edwin | |
| dc.contributor.author | SEMENOV, Dmitri | |
| hal.structure.identifier | AMOR 2018 | |
| dc.contributor.author | DUTREY, Anne | |
| dc.contributor.author | FLOCK, Mario | |
| dc.contributor.author | GORTI, Uma | |
| dc.contributor.author | BIRNSTIEL, Tilman | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 0004-637X | |
| dc.description.abstractEn | Observations of multiple rotational transitions from a single molecule allow for unparalleled constraints on the physical conditions of the emitting region. We present an analysis of CS in TW~Hya using the $J=7-6$, $5-4$ and $3-2$ transitions imaged at $\sim 0.5^{\prime\prime}$ spatial resolution, resulting in a temperature and column density profile of the CS emission region extending out to 230~au, far beyond previous measurements. In addition, the 15~kHz resolution of the observations and the ability to directly estimate the temperature of the CS emitting gas, allow for one of the most sensitive searches for turbulent broadening in a disk to date. Limits of $v_{\rm turb} \lesssim 0.1 c_s$ can be placed across the entire radius of the disk. We are able to place strict limits of the local H$_2$ density due to the collisional excitations of the observed transitions. From these we find that a minimum disk mass of $3 \times 10^{-4}~M_{\rm sun}$ is required to be consistent with the CS excitation conditions and can uniquely constrain the gas surface density profile in the outer disk. | |
| dc.language.iso | en | |
| dc.publisher | American Astronomical Society | |
| dc.subject.en | Astrophysics - Earth and Planetary Astrophysics | |
| dc.title.en | Temperature, Mass and Turbulence: A Spatially Resolved Multi-Band Non-LTE Analysis of CS in TW~Hya | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3847/1538-4357/aad80e | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.identifier.arxiv | 1808.01768 | |
| bordeaux.journal | The Astrophysical Journal | |
| bordeaux.page | id. 133 | |
| bordeaux.volume | 864 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01868353 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01868353v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The%20Astrophysical%20Journal&rft.date=2018&rft.volume=864&rft.issue=2&rft.spage=id.%20133&rft.epage=id.%20133&rft.eissn=0004-637X&rft.issn=0004-637X&rft.au=TEAGUE,%20Richard&HENNING,%20Thomas&GUILLOTEAU,%20S.&BERGIN,%20Edwin&SEMENOV,%20Dmitri&rft.genre=article |
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