IRS Characterization of a Debris Disk around an M-type star in NGC2547 - Astrophysics > Solar and Stellar AstrophysicsReport as inadecuate




IRS Characterization of a Debris Disk around an M-type star in NGC2547 - Astrophysics > Solar and Stellar Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present 5 to 15 micron Spitzer Infrared Spectrograph IRS low resolutionspectral data of a candidate debris disk around an M4.5 star identified as alikely member of the ~40 Myr old cluster NGC2547. The IRS spectrum shows asilicate emission feature, indicating the presence of warm, small,submicron-sized dust grains in the disk. Of the fifteen previously knowncandidate debris disks around M-type stars, the one we discuss in this paper isthe first to have an observed mid-infrared spectrum and is also the first tohave measured silicate emission. We combined the IRS data with ancillary dataoptical, JHKs, and Spitzer InfraRed Array Camera and 24 micron data to buildthe spectral energy distribution SED of the source. Monte Carlo radiationtransfer modeling of the SED characterized the dust disk as being very flath100=2AU and extending inward within at least 0.13AU of the central star. Ouranalysis shows that the disk is collisionally dominated and is likely a debrisdisk.



Author: Paula S. Teixeira 1,2,3,4, Charles J. Lada 1, Kenneth Wood 5, Thomas P. Robitaille 5, Kevin L. Luhman 6 1Harvard-Smithsonian CfA,

Source: https://arxiv.org/



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