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The structure of the Beta Leonis debris disk

Stock, Nathan D. and Su, Kate Y. L. and Liu, Wilson and Hinz, Phil M. and Rieke, George H. and Marengo, Massimo and Stapelfeldt, Karl R. and Hines, Dean C. and Trilling, David E. (2010) The structure of the Beta Leonis debris disk. Astrophysical Journal, 724 (2). pp. 1238-1255. ISSN 1538-4357

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Publisher’s or external URL: http://dx.doi.org/10.1088/0004-637X/724/2/1238

Abstract

We combine nulling interferometry at 10 μm using the MMT and Keck Telescopes with spectroscopy, imaging, and photometry from 3 to 100 μm using Spitzer to study the debris disk around β Leo over a broad range of spatial scales, corresponding to radii of 0.1 to ~100 AU. We have also measured the close binary star o Leo with both Keck and MMT interferometers to verify our procedures with these instruments. The β Leo debris system has a complex structure: (1) relatively little material within 1 AU; (2) an inner component with a color temperature of ~600 K, fitted by a dusty ring from about 2-3 AU; and (3) a second component with a color temperature of ~120 K fitted by a broad dusty emission zone extending from about ~5 AU to ~55 AU. Unlike many other A-type stars with debris disks, β Leo lacks a dominant outer belt near 100 AU.

Item Type: Article
Publisher’s Statement: © 2010 The American Astronomical Society. Published by IOP Publishing.
ID number or DOI: 10.1088/0004-637X/724/2/1238
Keywords: absolute calibration; circumstellar matter; dust; Evolution; infrared spectrograph; infrared: stars; main-sequence stars; multiband imaging photometer; mu-m; planetary systems; rotating star achernar; spitzer-space-telescope; stars: individual (beta Leo, o Leo); techniques: interferometric
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 30 Sep 2015 17:54
URI: http://openknowledge.nau.edu/id/eprint/432

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