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Far-infrared properties of M dwarfs

Show simple item record Gautier, Thomas N. III Rieke, G. H. Stansberry, John Bryden, Geoffrey C. Stapelfeldt, Karl R. Werner, Michael W. Beichman, Charles A. Chen, Christine Su, Kate Trilling, David Patten, Brian M. Roellig, Thomas L. 2008-11-04T21:42:31Z 2008-11-04T21:42:31Z 2007-09-20
dc.identifier.citation Astrophysical Journal, v.667, no.1, pp. 527-536 en_US
dc.identifier.clearanceno 06-2343
dc.description.abstract We report the mid- and far-infrared properties of nearby M dwarfs. Spitzer/MIPS measurements were obtained for a sample of 62 stars at 24 μm, with subsamples of 41 and 20 stars observed at 70 μm and 160 μm respectively. We compare the results with current models of M star photospheres and look for indications of circumstellar dust in the form of significant deviations of K-[24 μm] colors and 70 μm / 24 μm flux ratios from the average M star values. At 24 μm, all 62 of the targets were detected; 70 μm detections were achieved for 20 targets in the subsample observed; and no detections were seen in the 160 μm subsample. No clear far-infrared excesses were detected in our sample. The average far infrared excess relative to the photospheric emission of the M stars is at least four times smaller than the similar average for a sample of solar-type stars. However,this limit allows the average fractional infrared luminosity in the M-star sample to be similar to that for more massive stars. We have also set low limits (10−4 to 10−9 MEarth depending on location) for the maximum mass of dust possible around our stars. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher UNIV CHICAGO PRESS en_US
dc.subject debris disks; spitzer mips; en_US
dc.subject t-dwarfs en_US
dc.subject reduction algorithms en_US
dc.subject ultracool dwarfs en_US
dc.title Far-infrared properties of M dwarfs en_US
dc.type Article en_US

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