A dataset provided by the European Space Agency

Name OT2_calvesde_1
Title A deep Herschel PACS imaging survey of transitional disks
URL

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DOI 10.5270/esa-xg9ia57
Author alves de oliveira, c.
Description We propose to observe with Herschel PACS a sample of 64 candidate transitional disks around young stars with the goal of characterising their disk geometry and relate it to the physical processes ruling disk evolution. The defining characteristic of transitional disks is a reduced opacity in the inner disk, indicating the onset of the disk dissipation phase and thought to represent an intermediate evolutionary state between primordial and debris disks. They constitute the last stage where gas and dust are available to form planets, and therefore their study is of extreme value in understanding planet formation including the formation of our own Solar System. The sample of candidate transitional disks we propose to observe has been selected from a compilation of all the Class II young stellar objects members of nearby young clusters and associations, with known spectral types and spectral energy distributions complete up to the mid-IR. Our survey will greatly enrich the Herschel archive by extending current observations of transitional disks to a larger range of stellar masses, ages, and environments, as well as in sensitivity. Using PACS photometry we aim at characterising the disk structure and geometry for this large sample of transitional disks, to study possible correlations of the disk parameters with their host star and environment. By combining Herschel data with complementary diagnostics (accretion rates, dust masses, multiplicity) we will determine the likely causes for disk clearing, to ultimately learn about the processes of disk evolution leading to planet formation. This proposal is the last chance to acquire the far-IR information needed to fully exploit the scientific potential of our sample of candidate transitional disks in the coming decades. These objects are central to the understanding of disk evolution and the earliest stages of planet formation, and therefore the observations we propose have a high legacy value.
Publication Catalog of High Protostellar Surface Density Regions in Nearby Embedded Clusters . Li Juan et al. . The Astrophysical Journal, Volume 871, Issue 2, article id. 163, 18 pp. (2019). . 871 . 10.3847\/1538-4357\/aaf652 . 2019ApJ...871..163L ,
A Multi-band Catalog of 10978 Star Clusters, Associations, and Candidates in the Milky Way . Bica Eduardo et al. . The Astronomical Journal, Volume 157, Issue 1, article id. 12, 14 pp. (2019). . 157 . 10.3847\/1538-3881\/aaef8d . 2019AJ....157...12B ,
Instrument PACS_PacsPhoto_largeScan
Temporal Coverage 2013-03-17T15:52:34Z/2013-04-09T14:27:12Z
Version SPG v14.2.0
Mission Description 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 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-10-09T14:17:54Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-10-09T14:17:54Z, OT2_calvesde_1, SPG v14.2.0. https://doi.org/10.5270/esa-xg9ia57