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Herschel - pacs survey of protoplanetary disks in taurus - auriga observations of [o i] and [c ii], and far-infrared continuum
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Riviere-Marichalar, Pablo Menard Sr., Francois Williams, Jonathan P. Vacca, William D. Vicente, Silvia Barbado, David Eiroa Sr., Carlos Howard, Christian Kamp, Inga Duchene, Gaspard Podio, Linda Roberge, Aki Thi,, Wing-Fai Sandell, Goeran Grady, Carol Pinte, Christophe Dent, William R. F. Matthews, Geoffrey Meeus, Gwendolyn Augereau Sr., Jean-Charles |
| Copyright Year | 2013 |
| Description | The Herschel Space Observatory was used to observe approx. 120 pre-main-sequence stars in Taurus as part of the GASPS Open Time Key project. Photodetector Array Camera and Spectrometer was used to measure the continuum as well as several gas tracers such as [O I] 63 micron, [O I] 145 micron, [C II] 158, micron OH, H2O, and CO. The strongest line seen is [O I] at 63 micron. We find a clear correlation between the strength of the [O I] 63 micron line and the 63 micron continuum for disk sources. In outflow sources, the line emission can be up to 20 times stronger than in disk sources, suggesting that the line emission is dominated by the outflow. The tight correlation seen for disk sources suggests that the emission arises from the inner disk (<50 AU) and lower surface layers of the disk where the gas and dust are coupled. The [O I] 63 micron is fainter in transitional stars than in normal Class II disks. Simple spectral energy distribution models indicate that the dust responsible for the continuum emission is colder in these disks, leading to weaker line emission. [C II] 158 micron emission is only detected in strong outflow sources. The observed line ratios of [O I] 63 micron to [O I] 145 micron are in the regime where we are insensitive to the gas-to-dust ratio, neither can we discriminate between shock or photodissociation region emission. We detect no Class III object in [O I] 63 micron and only three in continuum, at least one of which is a candidate debris disk. |
| File Size | 1486402 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140013338 |
| Archival Resource Key | ark:/13960/t2q57m26g |
| Language | English |
| Publisher Date | 2013-09-20 |
| Access Restriction | Open |
| Subject Keyword | Gasps Open Time Key Project Photodetector Array Camera and Spectrometer Transitional Stars Protoplanetary Disks Spaceborne Astronomy Spectrometers Spectral Energy Distribution Pre-main Sequence Stars Stellar Evolution Infrared Astronomy Taurus Constellation Interstellar Matter Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
