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V445 Puppis, A First Identified Helium Nova

Published online by Cambridge University Press:  22 February 2018

Mariko Kato  and
Izumi Hachisu
Mariko Kato
Affiliation:
Keio University, Yokohama, Japan
Izumi Hachisu
Affiliation:
University of Tokyo, Tokyo, Japan

Abstract

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The 2001 outburst, of V445 Puppis is an unique object, that shows absence of hydrogen, enrichment of helium and carbon, slow decay of the light curve with a small amplitude. We have calculated theoretical light curves of helium novae to confirm that V445 Pup is the first example of helium nova. From the light curve fitting we conclude that the white dwarf is very massive ≥ 1.33M⊙.

Resumen

Resumen

La explosión de 2001 de V445 Puppis ha mostrado que se trata de un objeto unico que presenta ausencia de hidrógeno, enriquecimiento de helio y carbono y una lenta caída de la curva de luz con una amplitud pequeña. Hemos calculado curvas de luz teóricas de novas de helio para confirmar que V445 Pup es el primer ejemplo de una nova de helio. Del ajuste de la curva de luz podemos concluir que la enana blanca es muy masiva ≥ 1.33M⊙

Keywords

NovaeCataclismic Variables — StarsIndividual (V445 Puppis) — StarsMass Loss — White Dwarf
Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 196 - 198
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

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