|A Search for C II Around Dusty, A-Type Stars
|We propose to obtain PACS C II 157.7 micon line spectra of 10 bright debris disks around dusty, A-type stars (with 70 micron fluxes &amp;gt;0.4 Jy) that are expected to be gas-rich if circumstellar gas in debris disks is generated via collisinal vaporization and-or photo desorption. C II is expected to be the dominant cooling line in debris disks. The high luminosity and UV flux of A-type stars is expected to efficiently produce second-generation gas. We plan to (1) constrain directly the gas:dust ratio in debris disks, (2) test models for the production of second-generation gas from circumstellar dust, and (3) extrapolate the composition of undetected parent bodies. Since the C II line emission from debris disks is relatively faint, PACS is required to conduct these observations
|Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2013, OT2_cchen01_3, SPG v14.2.0. https://doi.org/10.5270/esa-ffm4xqy