4-8 July 2016
Kramer Law building
Africa/Johannesburg timezone
The Proceedings of SAIP2016 published on 24 December 2017
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The long-term evolution of the helium nova V445 Puppis

Presented by Prof. Patrick WOUDT on 7 Jul 2016 from 11:10 to 11:30
Type: Oral Presentation
Session: Astrophysics (1)
Track: Track D1 - Astrophysics

Abstract

Nova Puppis 2000 (V445 Pup) is the first - and so far only - helium nova detected in the Milky Way. From high angular resolution imaging and spatially-resolved kinematics we derived an expansion parallax of V445 Pup indicating a distance of 8.2 kpc. Here we report on two epochs of integral field unit spectroscopy of the helium nova V445 Pup using the 6.5-m Magellan-I telescope and the IMACS spectrograph. From observations taken one year apart, approximately 5 and 6 years after the nova explosion, we are able to resolve the kinematic signatures of the bipolar shell and isolate the spectra of the fast moving knots at the polar extremes of the ejecta. The latter are dominated by emission lines of oxygen, with no trace of the helium lines seen in the bulk of the ejecta. The fast moving knots are seen in two epochs of HST narrow band [OIII] imaging in 2013 and 2015. We discuss the implications of the unusual abundances and kinematics of this rare nova explosion.

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Location: Kramer Law building
Address: UCT Middle Campus Cape Town
Room: 5A


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