Cavities in inner disks: the GM Aurigae case
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | DUTREY, Anne | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | GUILLOTEAU, S. | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Grenoble [LAOG] | |
| hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
| dc.contributor.author | PIÉTU, V. | |
| hal.structure.identifier | Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB] | |
| hal.structure.identifier | Observatoire aquitain des sciences de l'univers [OASU] | |
| hal.structure.identifier | Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB] | |
| dc.contributor.author | CHAPILLON, E. | |
| hal.structure.identifier | Institut de RadioAstronomie Millimétrique [IRAM] | |
| dc.contributor.author | GUETH, F. | |
| hal.structure.identifier | Max-Planck-Institut für Astronomie [MPIA] | |
| dc.contributor.author | HENNING, T. | |
| dc.contributor.author | LAUNHARDT, R. | |
| dc.contributor.author | PAVLYUCHENKOV, Ya. | |
| dc.contributor.author | SCHREYER, Katharina | |
| dc.contributor.author | SEMENOV, D. | |
| dc.date.created | 2008 | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | Recent modeling based on unresolved infrared observations of the spectral energy distribution (SED) of GM Aurigae suggests that the inner disk of this single TTauri star is truncated at an inner radius of 25 AU. Aims. We attempt to find evidence of this inner hole in the gas distribution, using spectroscopy with high angular resolution. Methods. Using the IRAM array, we obtained high angular resolution (" 1.5”) observations with a high S/N per channel of the 13CO J=2–1 and C18O J=2–1 and of the 13CO J=1–0 lines. A standard parametric disk model is used to fit the line data in the Fourier-plane and to derive the CO disk properties. Our measurement is based on a detailed analysis of the spectroscopic profile from the CO disk rotating in Keplerian velocity. The millimeter continuum, tracing the dust, is also analyzed. Results. We detect an inner cavity of radius 19 ± 4 AU at the 4.5! level. The hole manifests itself by a lack of emission beyond the (projected) Keplerian speed at the inner radius. We also constrain the temperature gradient in the disk. Conclusions. Our data reveal the existence of an inner hole in GM Aur gas disk. Its origin remains unclear, but can be linked to planet formation or to a low mass stellar companion orbiting close to the central star (" 5-15 AU). The frequent finding of inner cavities suggests that either binarity is the most common scenario of star formation in Taurus or that giant planet formation starts early. | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.subject.en | Individual: GM Aurigae— stars: formation —stars: circumstellar matter —ISM: molecules radio lines: molecular | |
| dc.title.en | Cavities in inner disks: the GM Aurigae case | |
| dc.type | Article de revue | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph] | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | L15-L18 | |
| bordeaux.volume | 490 | |
| bordeaux.issue | 2 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00324543 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00324543v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2008&rft.volume=490&rft.issue=2&rft.spage=L15-L18&rft.epage=L15-L18&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=DUTREY,%20Anne&GUILLOTEAU,%20S.&PI%C3%89TU,%20V.&CHAPILLON,%20E.&GUETH,%20F.&rft.genre=article |
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