Infrared Studies of Epsilon Aurigae in Eclipse 2010

Type Conference Paper
Names Robert E. Stencel, B. Kloppenborg, R. Wall, S. Howell, D. Hoard, J. Rayner, S. Bus, A. Tokunaga, M. Sitko, R. Russell, D. Lynch, S. Brafford, H. Hammel, B. Whitney, G. Orton, P. Yanamandra-Fisher, J. Hora, W. Hoffman, A. Skemer
Proceedings Title Bulletin of the American Astronomical Society
Conference Name American Astronomical Society, AAS Meeting #217, #257.09
Volume 43
Date January 1, 2011
Library Catalog NASA ADS
Abstract We report a series of observations of the enigmatic long period eclipsing binary epsilon Aurigae during its eclipse interval 2009-2011, using near-infrared spectra & photometry obtained with SpeX/IRTF, Spitzer/IRAC, mid-infrared data with BASS on IRTF & AEOS, MIRSI on IRTF and MIRAC4 on MMT, along with MIRSI on IRTF and MIRAC4 on MMT & Denver's TNTCAM2 at WIRO, and an Optec SSP-4 J&H photometer at Mt.Evans Observatory. The objective of these observations include: (1) confirm the appearance of CO absorption bands at and after mid-eclipse, due to the dark disk, and (2) seek evidence for any mid-infrared solid state spectral features from particles in the disk, seen during different portions of total eclipse. The results to date show that the infrared eclipse is less deep than the optical one, and the implied disk temperature has begun to increase from 550K toward 1100K as eclipse progresses past midpoint and heated portions of the disk come into view. Material properties of the disk are consistent with large particles. This work was supported in part by the bequest of William Herschel Womble in support of astronomy at the University of Denver, by NSF grant 1016678 and JPL RSA 1414715 to the University of Denver, by NASA ADP grant NNX09AC73G to the University of Cincinnati, by The Aerospace Corporation's Independent Research and Development Program.
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