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

被引：64

作者：

Thi, W. -F. ^{[1
,2
]}

Mathews, G. ^{[3
]}

Menard, F. ^{[2
]}

Woitke, P. ^{[1
,4
,5
]}

Meeus, G. ^{[6
]}

Riviere-Marichalar, P. ^{[7
]}

Pinte, C. ^{[2
,8
]}

Howard, C. D. ^{[9
]}

Roberge, A. ^{[10
]}

Sandell, G. ^{[19
]}

Pascucci, I. ^{[11
]}

Riaz, B. ^{[11
]}

Grady, C. A. ^{[12
]}

Dent, W. R. F. ^{[13
]}

Kamp, I. ^{[14
]}

Duchene, G. ^{[2
,15
]}

Augereau, J. -C. ^{[2
]}

Pantin, E. ^{[16
]}

Vandenbussche, B. ^{[17
]}

Tilling, I. ^{[1
]}

Williams, J. P. ^{[3
]}

Eiroa, C. ^{[6
]}

Barrado, D. ^{[7
,18
]}

Alacid, J. M. ^{[19
]}

Andrews, S. ^{[20
]}

Ardila, D. R. ^{[21
]}

Aresu, G. ^{[14
]}

Brittain, S. ^{[22
]}

Ciardi, D. R. ^{[23
]}

Danchi, W.

Fedele, D. ^{[24
,25
,26
]}

de Gregorio-Monsalvo, I. ^{[13
]}

Heras, A. ^{[27
]}

Huelamo, N. ^{[4
]}

Krivov, A. ^{[28
,29
]}

Lebreton, J. ^{[2
]}

Liseau, R. ^{[30
]}

Martin-Zaidi, C. ^{[2
]}

Mendigutia, I. ^{[4
]}

Montesinos, B. ^{[4
]}

Mora, A. ^{[30
]}

Morales-Calderon, M. ^{[31
]}

Nomura, H. ^{[32
]}

Phillips, N. ^{[1
]}

Podio, L. ^{[14
]}

Poelman, D. R. ^{[5
]}

Ramsay, S. ^{[33
]}

Rice, K. ^{[1
]}

Solano, E. ^{[19
]}

Walker, H. ^{[34
]}

机构：

[1] Univ Edinburgh, Inst Astron, SUPA, Royal Observ Edinburgh, Edinburgh EH8 9YL, Midlothian, Scotland

[2] Univ Grenoble 1, CNRS, Lab Astrophys Grenoble LAOG, UMR 5571, F-38041 Grenoble 09, France

[3] Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA

[4] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland

[5] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[6] Univ Autonoma Madrid, Fac Ciencias, Dep Fis Teor, E-28049 Madrid, Spain

[7] CSIC, INTA, Ctr Astrobiol, Dept Astrofis,LAEX, Villanueva De La Canada 28691, Spain

[8] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[9] NASA, Ames Res Ctr, SOFIA USRA, Moffett Field, CA 94035 USA

[10] NASA, Goddard Space Flight Ctr, Exoplanets & Stellar Astrophys Lab, Greenbelt, MD 20771 USA

[11] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[12] NASA, Goddard Space Flight Ctr, Eureka Sci & Exoplanets & Stellar Astrophys Lab, Greenbelt, MD 20771 USA

[13] ESO ALMA, Santiago, Chile

[14] Univ Groningen, Kapteyn Astron Inst, NL-9700 AV Groningen, Netherlands

[15] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[16] CEA IRFU SAp, AIM UMR 7158, F-91191 Gif Sur Yvette, France

[17] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium

[18] Ctr Astron Hispano Aleman, Calar Alto Observ, Almeria 04004, Spain

[19] CSIC, INTA, Ctr Astrobiol, Dept Astrofis,Unidad Archivo Datos, Villanueva De La Canada 28691, Spain

[20] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[21] CALTECH, NASA Herschel Sci Ctr, Pasadena, CA 91125 USA

[22] Clemson Univ, Clemson, SC USA

[23] CALTECH, NASA Exoplanet Sci Inst, Pasadena, CA 91125 USA

[24] Univ Autonomade Madrid, Fac Ciencias, Dept Fis Teor, Madrid 28049, Spain

[25] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[26] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21210 USA

[27] ESA ESTEC, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands

[28] Univ Jena, Inst Astrophys, D-07745 Jena, Germany

[29] Univ Jena, Univ Sternwarte, D-07745 Jena, Germany

[30] Chalmers Univ Technol, Onsala Space Observ, Dept Radio & Space Sci, S-43992 Onsala, Sweden

[31] ESA ESAC Gaia SOC, Madrid 28691, Spain

[32] Kyoto Univ, Grad Sch Sci, Dept Astron, Kyoto 6068502, Japan

[33] European So Observ, D-85748 Garching, Germany

[34] Rutherford Appleton Lab, Didcot OX11 OQL, Oxon, England

[35] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England

来源：

ASTRONOMY & ASTROPHYSICS | 2010年 / 518卷

关键词：

circumstellar disks; MAIN-SEQUENCE STARS; PROTOPLANETARY DISKS; YOUNG STARS; X-RAY; HYDRAE; EMISSION; MODELS;

D O I：

10.1051/0004-6361/201014578

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Planets are formed in disks around young stars. With an age of similar to 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 (12) CO 3-2 and (CO)-C-13 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 mu m. The other lines that were observed, [OI] at 145 mu m and [CII] at 157 mu m, are not detected. No extended emission has been found. Preliminary modeling of the photometric and line data assuming [(CO)-C-12]/[(CO)-C-13] = 69 suggests a dust mass for grains with radius < 1 mm of similar to 1.9 x 10(-4) M-circle dot (total solid mass of 3 x 10(-3) M-circle dot) and a gas mass of (0.5-5) x 10(-3) M-circle dot. The gas-to-dust mass may be lower than the standard interstellar value of 100.

引用

页数：6

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