The V1647 Ori (IRAS 05436-0007) Protostar and its Environment
Peregrine M. McGehee, J. Allyn Smith, Arne A. Henden, Michael W. Richmond, Gillian R. Knapp, Douglas P. Finkbeiner, Zeljko Ivezic, J. Brinkmann
Abstract
We present Sloan Digital Sky Survey and United States Naval Observatory observations of the V1647 Ori protostar and surrounding field near NGC 2068. V1647 Ori, the likely driving source for HH 23, brightened significantly in November 2003. Analysis of SDSS imaging acquired in November 1998 and February 2002 during the quiescent state, recent USNO photometry, and published 2MASS and Gemini data shows that the color changes associated with brightening suggest an EXor outburst rather than a simple dust clearing event.
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