Search for brown - dwarf like secondaries in cataclysmic variables II - INSPIRE

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Search for brown - dwarf like secondaries in cataclysmic variables II

Ronald E. Mennickent
(
- Concepcion U.
)
,
M.P. Diaz
(
- Sao Paulo U., IAG
)
,
C. Tappert
(
- Concepcion U.
)

Oct, 2003

Published in:

Mon.Not.Roy.Astron.Soc. 347 (2004) 1180

e-Print:

astro-ph/0310682 [astro-ph]

DOI:

10.1111/j.1365-2966.2004.07282.x

View in:

ADS Abstract Service

reference search10 citations

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Abstract: (arXiv)

We have examined VTL/ISAAC 1-2.5 \umum spectroscopy of a sample of short orbital period cataclysmic variables which are candidates for harboring substellar companions. We provide descriptions of the infrared spectrum of \hbox{EI Psc}, \hbox{V834 Cen}, \hbox{WX Cet}, \hbox{VW Hyi}, \hbox{TY PsA} and \hbox{BW Scl}. Fitting of the IR spectral energy distribution (SED) was performed by comparing the observed spectrum with late-type templates. Absorption features of the secondary star were detected in \hbox{EI Psc} and \hbox{V834 Cen}, consistent with dwarf secondaries of spectral type K 5

\pm

1 and M 8

\pm

0.5, respectively. In addition, we report the first detection of the secondary star in \hbox{VW Hyi}. The SED in this case is well matched by an L 0

\pm

2 type secondary contributing 23 per cent to the overall flux at

\lambda

= 1.15 \umum. This is a surprising result for a system with a relatively high mass transfer rate. We discuss the implication of our findings on the current scenarios for cataclysmic variable star evolution.

References(26)

Figures(0)

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)
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)

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(
- UC, Riverside
)

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)
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)
,
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)

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et al.

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•
e-Print:
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•
DOI:
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