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Observations of V592 Cas -— an Outflow at Optical Wavelengths

Kafka, S. and Hoard, D. W. and Honeycutt, R. K. and Deliyannis, C. P. (2009) Observations of V592 Cas -— an Outflow at Optical Wavelengths. Astronomical Journal, 137 (1). pp. 197-206. ISSN 0004-6256. doi:10.1088/0004-6256/137/1/197.

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We present new red optical spectra of V592 Cas aimed at exploring the properties of the outflow of this system in a spectral region where the underlying white dwarf and the accretion disk do not contribute significantly to the observed absorption components of the Hα and He I line profiles. We use the Hα emission line to study the wind, which appears as pronounced blueshifted P Cygni absorption troughs whose low velocity end contaminates the blue side of the emission line profile. The wind appears to be episodic in nature, with multiple events reaching velocities of 5000 km s^–1 in Hα. Similar (but weaker) wind signatures appear in the He I 5876 Å line but are absent in He I 6678 Å. Our data suggest that during wind episodes the wind is phase dependent and is visible for half of the orbit of the system. Considering that V592 Cas is viewed almost face-on, the symmetry axis of the outflow cannot be orthogonal to the disk and/or the outflow must have some other inherent asymmetry in outflow geometry. A possible origin of the wind is in a disk hotspot, either at the initial impact point of the accretion stream on the disk edge or as a result of disk overflow (similar to SW Sextantis stars). Simultaneous optical photometry during one night of our spectroscopic observations indicate that there is no clear relationship between the optical brightness variations and the strength of the outflow in this system.

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Hoard, D. W.0000-0002-6800-6519
Additional Information:© 2009 The American Astronomical Society. Received 2008 May 27, accepted for publication 2008 October 7. Published 2008 December 10. Print publication: Issue 1 (2009 January). We thank our anonymous referee for her/his thorough review of the manuscript. Facilities: KPNO 2.1 m, WIYN 3.5 m, WIYN 0.9 m.
Subject Keywords:novae, cataclysmic variables; stars: individual (V592 Cas); stars: mass loss; stars: winds, outflows
Issue or Number:1
Record Number:CaltechAUTHORS:KAFaj09
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12519
Deposited By: Archive Administrator
Deposited On:12 Dec 2008 05:31
Last Modified:08 Nov 2021 22:29

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