. (2008) A planetary nebula around Nova V458 Vulpeculae undergoing flash ionization. Astrophysical Journal Letters, Vol.688 (No.1). L21-L24. ISSN 2041-8213

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Abstract

Nova V458 Vul erupted on 2007 August 8 and reached a visual magnitude of 8.1 a few days later. Ha images obtained 6 weeks before the outburst as part of the IPHAS Galactic plane survey reveal an 18th magnitude progenitor surrounded by an extended nebula. Subsequent images and spectroscopy of the nebula reveal an inner nebular knot increasing rapidly in brightness due to flash ionization by the nova event. We derive a distance of 13 kpc based on light travel time considerations, which is supported by two other distance estimation methods. The nebula has an ionized mass of 0.2 M-circle dot and a low expansion velocity: this rules it out as ejecta from a, previous nova eruption, and is consistent with it being a similar to 14,000 year old planetary nebula, probably the product of a prior common envelope (CE) phase of evolution of the binary system. The large derived distance means that the mass of the erupting WD component of the binary is high. We identify two possible evolutionary scenarios, in at least one of which the system is massive enough to produce a Type Ia supernova upon merging.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Planetary nebulae, Cosmic abundances, Cataclysmic variable stars, Stars, New
Journal or Publication Title:	Astrophysical Journal Letters
Publisher:	IOP Publishing Ltd
ISSN:	2041-8213
Date:	20 November 2008
Volume:	Vol.688
Number:	No.1
Number of Pages:	4
Page Range:	L21-L24
Identification Number:	10.1086/594366
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	INT Photometric Ha Survey of the Northern Galactic Plane (IPHAS), Isaac Newton Telescope at La Palma Observatory, Cambridge Astronomical Survey Unit (CASU), Institute of Astronomy in Cambridge, Science and Technology Facilities Council (Great Britain) (STFC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/28655

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