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

Published online by Cambridge University Press:  01 May 2007

Sean D. Brittain ,
Theodore Simon ,
Terrence W. Rettig ,
Erika L. Gibb ,
Dinshaw Balsara ,
David Tilley  and
Kenneth H. Hinkle
Sean D. Brittain
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-0978 email: sbritt@clemson.edu
Theodore Simon
Affiliation:
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Dr, Honolulu, HI 96822
Terrence W. Rettig
Affiliation:
Center for Astrophysics, University of Notre Dame, Notre Dame, IN 46556
Erika L. Gibb
Affiliation:
University of Missouri at St. Louis, 8001 Natural Bridge Road, St. Louis, MO, 63121
Dinshaw Balsara
Affiliation:
Center for Astrophysics, University of Notre Dame, Notre Dame, IN 46556
David Tilley
Affiliation:
Center for Astrophysics, University of Notre Dame, Notre Dame, IN 46556
Kenneth H. Hinkle
Affiliation:
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Abstract

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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.

Keywords

Accretionaccretion disksstars: V1647 Oriformationmass losscircumstellar matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S243: Star-Disk Interaction in Young Stars , May 2007 , pp. 223 - 230
Copyright
Copyright © International Astronomical Union 2007

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