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Herschel-PACS observation of the 10 Myr old T Tauri disk TW Hya
- Source :
- Astronomy & astrophysics, 518:125. EDP Sciences, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 518, pp.L125
- Publication Year :
- 2010
-
Abstract
- Planets are formed in disks around young stars. With an age of ~10 Myr, TW Hya is one of the nearest T Tauri stars that is still surrounded by a relatively massive disk. In addition a large number of molecules has been found in the TW Hya disk, making TW Hya the perfect test case in a large survey of disks with Herschel-PACS to directly study their gaseous component. We aim to constrain the gas and dust mass of the circumstellar disk around TW Hya. We observed the fine-structure lines of [OI] and [CII] as part of the Open-time large program GASPS. We complement this with continuum data and ground-based 12CO 3-2 and 13CO 3-2 observations. We simultaneously model the continuum and the line fluxes with the 3D Monte-Carlo code MCFOST and the thermo-chemical code ProDiMo to derive the gas and dust masses. We detect the [OI] line at 63 micron. The other lines that were observed, [OI] at 145 micron and [CII] at 157 micron, are not detected. No extended emission has been found. Preliminary modeling of the photometric and line data assuming [12CO]/[13CO]=69 suggests a dust mass for grains with radius < 1 mm of ~1.9 times 10^-4 Msun (total solid mass of 3 times 10^-3 Msun) and a gas mass of (0.5--5) times 10^-3 Msun. The gas-to-dust mass may be lower than the standard interstellar value of 100.<br />6 pages, 6 figures, accepted for publication in the A&A Herschel special issue
- Subjects :
- circumstellar disks
Continuum (design consultancy)
MODELS
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
Planet
YOUNG STARS
0103 physical sciences
Astrophysics::Solar and Stellar Astrophysics
SPECTRA
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
ComputingMilieux_MISCELLANEOUS
Line (formation)
Physics
010308 nuclear & particles physics
Astronomy and Astrophysics
Solid mass
Radius
Circumstellar disk
T Tauri star
Stars
Astrophysics - Solar and Stellar Astrophysics
13. Climate action
Space and Planetary Science
HYDRAE
X-RAY
ARRAY
Astrophysics::Earth and Planetary Astrophysics
EMISSION
MAIN-SEQUENCE STARS
PROTOPLANETARY DISKS
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 518
- Database :
- OpenAIRE
- Journal :
- Astronomy & astrophysics
- Accession number :
- edsair.doi.dedup.....446b80ab284235658d27fe3d4ecaa9c6