Last gasp of V1647 Ori: a brief post-outburst warm, molecular wind

Details Last gasp of V1647 Ori: a brief post-outburst warm, molecular wind Last gasp of V1647 Ori: a brief post-outburst warm, molecular wind

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..243..223b&link_type=abstract

Star-Disk Interaction in Young Stars, Proceedings of the International Astronomical Union, IAU Symposium, Volume 243, p. 223-230

Astronomy and Astrophysics

Astronomy

4

Accretion, Accretion Disks, Stars: V1647 Ori, Formation, Mass Loss, Circumstellar Matter

Scientific paper

Followup infrared spectroscopy is reported for V1647 Ori, a young star whose recent eruption illuminated McNeil's Nebula. Lines of HI, H2, and CO are compared to previous observations. We find that the accretion rate fell two orders of magnitude and the CO bandheads disappeared at the end of the outburst. We also report a striking metamorphosis of the fundamental CO spectrum from centrally peaked profiles to emission lines with superimposed blue-shifted absorption lines and back again one year later. This remarkable change in spectral appearance indicates that the system did not return to equilibrium immediately following the outburst. In this paper we propose a mechanism to explain the emergence of a transient post-outburst outflow.

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