How Evolved are the Mass Donor Stars in Cataclysmic Variables?
Open Access
- 25 August 2001
- journal article
- research article
- Published by Oxford University Press (OUP) in Publications of the Astronomical Society of Japan
- Vol. 53 (4) , 675-678
- https://doi.org/10.1093/pasj/53.4.675
Abstract
Recent spectroscopic observations have identified several cataclysmic variables non-solar metal abundances. We present theoretical models which examine the level of core evolution expected for CV secondaries prior to contact. Our results indicate that few secondary stars evolve past 10% of their main sequence lifetime prior to the initiation of mass transfer; a result of which is in agreement with present day observations. Thus, the non-solar metal abundances observed must be due to nuclear burning by-products accreted by the secondary star during common envelope sweeping prior to initial contact or ejecta collected during classical nova outbursts.Keywords
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This publication has 12 references indexed in Scilit:
- An Exploration of the Paradigm for the 2–3 Hour Period Gap in Cataclysmic VariablesThe Astrophysical Journal, 2001
- Spectroscopic Discovery of Brown Dwarf–like Secondary Stars in the Cataclysmic Variables LL Andromedae and EF EridaniThe Astrophysical Journal, 2001
- The Spectroscopic and Astrometric Parallaxes of Three Dwarf Novae: The Nature of the Secondary Stars of U Geminorum, SS Aurigae, and SS CygniThe Astronomical Journal, 2000
- On the late spectral types of cataclysmic variable secondariesMonthly Notices of the Royal Astronomical Society, 2000
- GHRS Observations of the White Dwarf in U GeminorumThe Astrophysical Journal, 1999
- The chemical evolution of the secondary stars in close binaries, arising from common-envelope evolution and nova outburstsMonthly Notices of the Royal Astronomical Society, 1998
- [ITAL]Hubble Space Telescope[/ITAL] Observations of the Dwarf Nova WZ Sagittae: A Very Rapidly Rotating White DwarfThe Astrophysical Journal, 1997
- The Composition of Nova Ejecta from Multicycle Evolution ModelsThe Astrophysical Journal, 1997
- An observational test of common-envelope evolutionMonthly Notices of the Royal Astronomical Society, 1995
- On the interpretation and implications of nova abundances: an abundance of riches or an overabundance of enrichmentsThe Astrophysical Journal, 1994