A dataset provided by the European Space Agency

Name OT1_jsimon01_1
Title A Population of Dusty B Stars in the SMC: The First Extragalactic Debris Disks?
URL

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DOI 10.5270/esa-rl2nm1z
Author simon, j.
Description Using data from the Spitzer Survey of the SMC, we have discovered a population of 120 main sequence B stars with large 24 micron excesses. Optical spectroscopy and the IRAC SEDs demonstrate that they are not ordinary YSOs or Be stars. We suggest instead that these objects may be debris disks around massive main sequence stars. Confirmation of this hypothesis would provide one of the only ways to study the process of planet formation in a low-metallicity external galaxy. We have measured the mid-IR SED of the dust emission with IRS spectroscopy and determined that both cold and warm dust is present. We now propose PACS photometry at 70 microns to unambiguously separate the dust into its warm (and therefore circumstellar) and cold (possibly interstellar) components. These data will enable us to determine how much of the dust is warm and better constrain the temperature distribution; any targets with substantial amounts of warm dust are almost certainly debris disks. If the B stars do indeed host debris disks, they provide perhaps the only plausible method for constraining planet formation in an external galaxy for the foreseeable future.
Publication Dusty OB Stars in the Small Magellanic Cloud. II. Extragalactic Disks or Examples of the Pleiades Phenomenon? . Adams Joshua J. et al. . The Astrophysical Journal, Volume 771, Issue 2, article id. 112, 23 pp. (2013). . 771 . 10.1088\/0004-637X\/771\/2\/112 . 2013ApJ...771..112A ,
Instrument PACS_PacsPhoto_largeScan
Temporal Coverage 2011-02-25T10:19:23Z/2011-07-23T21:36:29Z
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 2012-01-23T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-01-23T00:00:00Z, OT1_jsimon01_1, SPG v14.2.0. https://doi.org/10.5270/esa-rl2nm1z