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26 April 2024

» arxiv » 1005.3864

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Gas in Protoplanetary Discs (GASPS) 1. First results
G. S. Mathews ; W. R. F. Dent ; J. P. Williams ; C. D. Howard ; G. Meeus ; B. Riaz ; A. Roberge ; G. Sandell ; B. Vandenbussche ; G. Duchêne ; I. Kamp ; F. Ménard ; B. Montesinos ; C. Pinte ; W.F. Thi ; P. Woitke ; J.M. Alacid ; S.M. Andrews ; D.R. Ardila ; G. Aresu ; J.C. Augereau ; D. Barrado ; S. Brittain ; D. R. Ciardi ; W. Danchi ; C. Eiroa ; D. Fedele ; C. A. Grady ; I. de Gregorio-Monsalvo ; A. Heras ; N. Huelamo ; A. Krivov ; J. Lebreton ; R. Liseau ; C. Martin-Zaidi ; I. Mendigutía ; A. Mora ; M. Morales-Calderon ; H. Nomura ; E. Pantin ; I. Pascucci ; N. Phillips ; L. Podio ; D.R. Poelman ; S. Ramsay ; K. Rice ; P. Riviere-Marichalar ; E. Solano ; I. Tilling ; H. Walker ; G. J. White ; G. Wright ; GASPS Collaboration ;
Date:	21 May 2010
Abstract:	Context - Circumstellar discs are ubiquitous around young stars, but rapidly dissipate their gas and dust on timescales of a few Myr. The Herschel space observatory allows for the study of the warm disc atmosphere, using far-infrared spectroscopy to measure gas content and excitation conditions, and far-IR photometry to constrain the dust distribution. Aims - We aim to detect and characterize the gas content of circumstellar discs in four targets as part of the Herschel science demonstration phase. Methods - We carried out sensitive medium resolution spectroscopy and high sensitivity photometry at lambda ~60-190 micron using the Photodetector Array Camera and Spectrometer instrument on the Herschel space observatory. Results - We detect [OI] 63 micron emission from the young stars HD 169142, TW Hydrae, and RECX 15, but not HD 181327. No other lines, including [CII] 158 and [OI] 145, are significantly detected. All four stars are detected in photometry at 70 and 160 micron. Extensive models are presented in associated papers.
Source:	arXiv, 1005.3864
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