Accretion Disks of Binary Stars as a Probe to Accretion Disks of other Astrophysical Objects

Details Accretion Disks of Binary Stars as a Probe to Accretion Disks of other Astrophysical Objects Accretion Disks of Binary Stars as a Probe to Accretion Disks of other Astrophysical Objects

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..209e&link_type=abstract

Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he

Astronomy and Astrophysics

Astrophysics

Scientific paper

The understandings of the processes that led to accretion in astrophysical objects have been a central problem for some decades now. However, we have a more detailed knowledge of binary disks accretion process because, first there are large number of such systems within 100 pc; and such proximity allows fainter spectral features to be analyzed. Secondly, the primary star in a binary can sometimes be used as probe, eclipsing portions of the disks at different times, thereby allowing disks properties to be mapped. Finally, accretion disks occur over a time scale convenient for observational monitoring and much can be leaned by studying the evolving spectra. In this work an attempt has been made to use the results from spectral analyses of the accretion disks of cataclysmic variables to make generalization on accretion disks of other astrophysical objects. For the 15 cataclysmic variables studied there is sufficient evidence to show that their accretion disks are highly ionized. This result supports the fact that the angular momentum transport which lead to accretion is purely by magneto rotational instability if the accretion disks is adequately ionized.

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