Recent Near-Infrared Photometry of KH 15D: the Eclipses have Ended but Significant Light Variations on the Orbital Period Continue

Details Recent Near-Infrared Photometry of KH 15D: the Eclipses have Ended but Significant Light Variations on the Orbital Period Continue Recent Near-Infrared Photometry of KH 15D: the Eclipses have Ended but Significant Light Variations on the Orbital Period Continue

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734002h&link_type=abstract

American Astronomical Society, AAS Meeting #217, #340.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

VIJH photometry of the formerly eclipsing binary T Tauri system KH 15D has been obtained with the SMARTS 1.3m telescope at CTIO covering the period since the eclipses have ended. As is seen in the optical, large amplitude variations on the orbital period continue in J and H but do not have the character of an eclipse. These are attributed to changes in the scattering geometry that occur as the stars move with respect to the circumbinary disk. The system reddens as it fades, reversing the trend that was seen during the eclipse epoch. Possible causes for this behavior include variations in the reflectance properties of the disk with distance from the binary and the existence of a putative third source of (red) light. Support from NASA through its Origins of Solar Systems program is gratefully acknowledged. One of (A.B.) was supported by an NSF/REU grant to Wesleyan University in support of the Keck Northeast Astronomy Consortium.

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