Observing Novalike Cataclysmic Variables: Do the Nearest Hot Accretion Disks Have the Infrared Spectra We Expect?

Details Observing Novalike Cataclysmic Variables: Do the Nearest Hot Accretion Disks Have the Infrared Spectra We Expect? Observing Novalike Cataclysmic Variables: Do the Nearest Hot Accretion Disks Have the Infrared Spectra We Expect?

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50068h&link_type=abstract

Spitzer Proposal ID #50068

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Scientific paper

Novalikes are a subclass of cataclysmic variables in which the mass transfer rate is sufficiently high that the disk that mediates mass transfer to the white dwarf primary star is nearly always in the hot-ionized state. As such, they are the closest and best examples of steady state accretion disks around a compact object. With one exception, IX Vel, none has been observed with Spitzer. This is unfortunate since observations with Spitzer can be used to check our expectation that the spectral energy distribution of the disk is dominated by its hot interior regions, and to establish the infrared spectra of these objects. Observations are sorely needed so that we can test the steady state accretion disk theory, constrain and improve accretion disk models, construct multi-wavelength models of such systems, and search for evidence of other luminous components, including material outside the disk (e.g., in a wind, circumbinary disk, and/or the donor star). Here we propose to rectify this oversight by observing a small sample of novalike cataclysmic variables with IRS and IRAC to establish the universality of the spectrum and to explore differences in the spectra that are likely to be associated with orbital period and inclination.

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