Hubble Space Telescope Observations of the Nova-Like Cataclysmic Variable V348 Puppis

Astrophysics, abstract
astro-ph/0304328

From: Cynthia S. Froning <cfroning@origins.colorado.edu>

Date: Thu, 17 Apr 2003 16:26:31 GMT   (97kb)

Authors:
C.S. Froning,
K.S. Long,
R. Baptista

Comments: 21 pages, 11 figures, prepared using emulateapj.sty. To appear in the
Astronomical Journal

We present time series UV and optical (1150 — 8000 A) spectrophotometry of
the novalike (NL) cataclysmic variable V348 Pup through and after eclipse.
Outside of eclipse, the spectrum is characterized by a blue continuum, strong
line emission, and a broad dip from 2000 — 3000 A. The continuum eclipse depth
is roughly the same over the entire wavelength range covered and there are no
signatures of the WD eclipse in the light curves. Model steady-state accretion
disk spectra provide a poor fit to the shape of the UV-optical spectrum outside
of eclipse. All of these properties are consistent with a disk that is
self-shielding, hiding the inner disk and the white dwarf. In eclipse, the
emission lines and the broad dip are occulted less than the continuum,
indicating vertical extension in these components. The dip is consistent with
the presence of a vertical “Fe II” absorbing curtain in the system. Archival
UV-optical spectra of the lower-inclination NL UX UMa show a bluer continuum
and weaker line emission than in V348 Pup and no broad dip. There is strong
flickering in V348 Pup. The flickering spectrum shows that the flickering
occurs only in the continuum. We did not detect any periodicities associated
with the rapid variability. The properties of V348 Pup are consistent with its
previous identification as a member of the SW Sex sub-class of NLs.

References and citations for this submission:

SLAC-SPIRES HEP (refers to ,
cited by, arXiv reformatted)