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The expanding bipolar shell of the helium nova V445 puppis

Show simple item record Woudt P.A. en Steeghs D. en Karovska M. en Warner B. en Groot P.J. en Nelemans G. en Roelofs G.H.A. en Marsh T.R. en Nagayama T. en Smits D.P. en O'Brien T. en 2012-11-01T16:31:22Z 2012-11-01T16:31:22Z 2009 en
dc.identifier.citation Astrophysical Journal Letters en
dc.identifier.citation 706 en
dc.identifier.citation 1 en
dc.identifier.issn 20418205 en
dc.identifier.other 10.1088/0004-637X/706/1/738 en
dc.description.abstract From multi-epoch adaptive optics imaging and integral field unit spectroscopy, we report the discovery of an expanding and narrowly confined bipolar shell surrounding the helium nova V445 Puppis (Nova Puppis 2000). An equatorial dust disc obscures the nova remnant, and the outflow is characterized by a large polar outflow velocity of 6720±650 km s -1 and knots moving at even larger velocities of 8450±570 km s -1. We derive an expansion parallax distance of 8.2±0.5 kpc and deduce a pre-outburst luminosity of the underlying binary of log L/L ⊙ = 4.34±0.36. The derived luminosity suggests that V445 Puppis probably contains a massive white dwarf accreting at high rate from a helium star companion making it part of a population of binary stars that potentially lead to supernova Ia explosions due to accumulation of helium-rich material on the surface of a massive white dwarf. © 2009. The American Astronomical Society. All rights reserved. en
dc.language.iso en en
dc.subject Instrumentation: Adaptive optics; Novae, cataclysmic variables; Stars: Individual (V445 Puppis en
dc.title The expanding bipolar shell of the helium nova V445 puppis en
dc.type Article en

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