2010A&A...518L.125T


Query : 2010A&A...518L.125T

2010A&A...518L.125T - Astronomy and Astrophysics, volume 518, L125-125 (2010/7-2)

Herschel-PACS observation of the 10 myr old T Tauri disk TW Hya. Constraining the disk gas mass.

THI W.-F., MATHEWS G., MENARD F., WOITKE P., MEEUS G., RIVIERE-MARICHALAR P., PINTE C., HOWARD C.D., ROBERGE A., SANDELL G., PASCUCCI I., RIAZ B., GRADY C.A., DENT W.R.F., KAMP I., DUCHENE G., AUGEREAU J.-C., PANTIN E., VANDENBUSSCHE B., TILLING I., WILLIAMS J.P., EIROA C., BARRADO D., ALACID J.M., ANDREWS S., ARDILA D.R., ARESU G., BRITTAIN S., CIARDI D.R., DANCHI W., FEDELE D., DE GREGORIO-MONSALVO I., HERAS A., HUELAMO N., KRIVOV A., LEBRETON J., LISEAU R., MARTIN-ZAIDI C., MENDIGUTIA I., MONTESINOS B., MORA A., MORALES-CALDERON M., NOMURA H., PHILLIPS N., PODIO L., POELMAN D.R., RAMSAY S., RICE K., SOLANO E., WALKER H., WHITE G.J. and WRIGHT G.

Abstract (from CDS):

Planets are formed in disks around young stars. With an age of ∼10Myr, 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 12 CO 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 63µm. The other lines that were observed, [OI] at 145µm and [CII] at 157µm, 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 <1mm of ∼1.9x10–4M (total solid mass of 3x10–3M) and a gas mass of (0.5-5)x10–3M. The gas-to-dust mass may be lower than the standard interstellar value of 100.

Abstract Copyright:

Journal keyword(s): circumstellar disks

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3923 0
2 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1736 1
3 HD 169142 Ae* 18 24 29.7799891464 -29 46 49.327400568   8.42 8.16     F1VekA3mA3_lB? 387 2

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2022.05.25-03:58:10

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