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Modeling of Oxygen-Neon Dominated Accretion Disks in Ultracompact X-Ray Binaries: 4U 1626-67

Published online by Cambridge University Press:  22 February 2018

K. Werner ,
T. Nagel ,
S. Dreizler  and
T. Rauch
K. Werner
Affiliation:
IAAT, Universität Tübingen, Germany
T. Nagel
Affiliation:
IAAT, Universität Tübingen, Germany
S. Dreizler
Affiliation:
Universitätssternwarte Güttingen, Germany
T. Rauch
Affiliation:
IAAT, Universität Tübingen, Germany Sternwarte Bamberg, Germany

Abstract

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We report on first results of computing synthetic spectra from H/He-poor accretion disks in ultracompact LMXBs. We aim at the determination of the chemical composition of the very low-mass donor star, which is the core of a former C/O white dwarf. The abundance analysis allows to draw conclusions on gravitational settling in WDs which is an important process affecting cooling times and pulsational g-mode periods.

Resumen

Resumen

Presentamos los primeros resultados computacionales de espectros sintéticos de discos de acreción pobres en H/He on ultracompactas LMXBs. Nuestro objetivo es la determinación de la composición química de la estrella donadora do muy baja masa que forma el núcleo de lo que fue una enana blanca C/O. El análisis de abundancias nos pemite obtener conclusiones sobre el asentamiento gravitacional en WDs, un importante proceso que afecta a los tioiupos de enfriamiento y a los períodos pulsantes de los modos g.

Keywords

AccretionAccretion Disks — BinariesClose — White Dwarfs
Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 146 - 147
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

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