Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341302b&link_type=abstract
American Astronomical Society, AAS Meeting #213, #413.02; Bulletin of the American Astronomical Society, Vol. 41, p.220
Astronomy and Astrophysics
Astronomy
Scientific paper
Eruptions in young stars are rare and can provide us with new insight into the mechanics of star formation. High-resolution near-IR observations were taken of the 2004-2006 outburst of V1647 Orionis, a young variable which illuminates what is now termed McNeil's nebula. From these observations, we are able to follow the decrease in the mass accretion rate onto the star as the outburst subsides using Br-gamma and Pa-beta emission line fluxes. Accretion rates were found to range from 5 x 10-6 solar masses per year during the outburst to 3 x 10-7 solar masses per year one year following the outburst, showing that there is a definite relationship between accretion of circumstellar material onto the disk and the eruptive event. We present these results and consider their implications for pre-main sequence stellar evolution.
This work was conducted by a Research Experience for Undergraduates (REU) position at the University of Hawaii's Institute for Astronomy and funded by the NSF.
Aspin Colin
Beerman Lori
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