Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1003t&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #10.03; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the current state of V1647 Ori, the star whose outburst illuminated McNeil's nebula. Recent optical and near-infrared measurements of H-alpha and Brackett Gamma are compared with previous observations in order to determine the degree to which the system has relaxed and the current accretion rate. During the outburst, the stellar luminosity increased by a factor of three, and the accretion rate reached 10-5 M⊙ yr-1. The latest photometry of this nebula indicates that the star has nearly returned to its pre-outburst brightness, and the accretion rate has decreased by more than two orders of magnitude. During the outburst, H-alpha exhibited a P Cygni line profile, due possibly to a warm outflow, which has since cooled. H-alpha is also compared to previous observations as the system returns to quiescence.
Brittain Sean
Donehew Brian
Gibb Erika
Rettig Terrence
Simon Theodore
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