Monitoring the decaying outburst of V1057 Cyg

Details Monitoring the decaying outburst of V1057 Cyg Monitoring the decaying outburst of V1057 Cyg

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..237h&link_type=abstract

NOAO Proposal ID #1999B-0237

Physics

Scientific paper

The FU Ori object V1057 Cyg is currently undergoing a rapid decline in light, due to a decline in the accretion rate through its protostellar disk. Spectral changes have been observed at optical wavelengths, including an increase in strength in wind features. V1057 Cyg is the only FUOr which has decayed so far from its maximum brightness, and which is so close to its pre-outburst state. Timely study of this unique object will provide an unprecedented opportunity to observe the end of an FU Ori outburst and constrain disk physics. We request observations of the first overtone CO absorption lines near 2.2(micron) with Phoenix on the 2.1m to study the spectral evolution of outer disk regions. Combined with our optical monitoring of spectral changes in the hotter, innermost disk, these data will allow us to understand the evolution of the disk outburst over a substantial range of disk radii.

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