Gas in Protoplanetary Discs (GASPS) 1. First results
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.
Keywords
Cite
@article{arxiv.1005.3864,
title = {Gas in Protoplanetary Discs (GASPS) 1. First results},
author = {G. S. Mathews and W. R. F. Dent and J. P. Williams and C. D. Howard and G. Meeus and B. Riaz and A. Roberge and G. Sandell and B. Vandenbussche and G. Duchêne and I. Kamp and F. Ménard and B. Montesinos and C. Pinte and W. F. Thi and P. Woitke and J. M. Alacid and S. M. Andrews and D. R. Ardila and G. Aresu and J. C. Augereau and D. Barrado and S. Brittain and D. R. Ciardi and W. Danchi and C. Eiroa and D. Fedele and C. A. Grady and I. de Gregorio-Monsalvo and A. Heras and N. Huelamo and A. Krivov and J. Lebreton and R. Liseau and C. Martin-Zaidi and I. Mendigutía and A. Mora and M. Morales-Calderon and H. Nomura and E. Pantin and I. Pascucci and N. Phillips and L. Podio and D. R. Poelman and S. Ramsay and K. Rice and P. Riviere-Marichalar and E. Solano and I. Tilling and H. Walker and G. J. White and G. Wright and the GASPS Collaboration},
journal= {arXiv preprint arXiv:1005.3864},
year = {2015}
}
Comments
Comments: 5 pages, 2 Postscript figures, accepted for publication in the A&A Herschel special issue