GASPS - a Herschel survey of gas and dust in Protoplanetary Disks: Summary and Initial Statistics
W.R.F. Dent, W.F. Thi, I. Kamp, J.P. Williams, F. Menard, S.Andrews,, D. Ardila, G. Aresu, J-C. Augereau, D. Barrado y Navascues, S. Brittain, A., Carmona, D. Ciardi, W. Danchi, J. Donaldson, G. Duchene, C. Eiroa, D.Fedele,, C. Grady, I. de Gregorio-Molsalvo, C. Howard

TL;DR
GASPS is a Herschel survey that studies gas and dust in protoplanetary disks, revealing detection rates, disk evolution, and gas content in young stellar objects through far-infrared observations.
Contribution
This paper presents initial results from the GASPS survey, including detection statistics and insights into disk gas content and evolution in young stellar associations.
Findings
[OI]63um was the brightest line detected in most objects.
Detection rates were 49%, with 100% for Herbig AeBe stars.
Disks with dust mass >1e-5 M_solar are more likely to be detected.
Abstract
GASPS is a far-infrared line and continuum survey of protoplanetary and young debris disks using PACS on the Herschel Space Observatory. The survey includes [OI] at 63 microns, as well as 70, 100 and 160um continuum, with the brightest objects also studied in [OI]145um, [CII]157um, H2O and CO. Targets included T Tauri stars and debris disks in 7 nearby young associations, and a sample of isolated Herbig AeBe stars. The aim was to study the global gas and dust content in a wide disk sample, systemically comparing the results with models. In this paper we review the main aims, target selection and observing strategy. We show initial results, including line identifications, sources detected, and a first statistical study. [OI]63um was the brightest line in most objects, by a factor of ~10. Detection rates were 49%, including 100% of HAeBe stars and 43% of T Tauri stars. Comparison with…
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