2002A&A...393..611D


Query : 2002A&A...393..611D

2002A&A...393..611D - Astronomy and Astrophysics, volume 393, 611-615 (2002/10-2)

On the use of 12CO/13CO as a test of common-envelope evolution.

DHILLON V.S., LITTLEFAIR S.P., MARSH T.R., SARNA M.J. and BOAKES E.H.

Abstract (from CDS):

We present K-band echelle spectra of the cataclysmic variable SS Cyg and the pre-cataclysmic variable V471 Tau in order to measure the strengths of the 12CO and 13CO bands at 2.3525 and 2.3448 µm, respectively, and so perform the observational test of the common-envelope model of close binary star evolution proposed by Sarna et al. (1995MNRAS.272L..41S). Although we find evidence of an absorption feature coincident with the expected wavelength of 13CO in both objects, we attribute it instead to a cluster of neutral atomic absorption features (primarily due to TiI) possibly arising from star-spots on the surfaces of the rapidly rotating secondary stars in these systems, thereby rendering the test inconclusive. We present a modified observational test of common-envelope evolution, based on the observation of the 13CO bands at 2.3739 and 2.4037µm, which is insensitive to spectral contamination by star-spots.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - stars: individual: SS Cyg - stars: individual: V471 Tau - novae, cataclysmic variables - infrared: stars - nuclear reactions, nucleosynthesis, abundances

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * 42 Psc PM* 00 22 25.4826155365 +13 28 56.957400190   7.489 6.240     K3III 26 0
2 HD 16160 PM* 02 36 04.9023844802 +06 53 12.431588708   6.81   5.2   K3V 498 1
3 V* V471 Tau EB* 03 50 24.9664598642 +17 14 47.433240686   10.258 9.373   8.393 K2V+DA 626 0
4 Wolf 359 Er* 10 56 28.826208 +07 00 52.34400 16.706 15.541 13.507 11.684 9.507 dM6 645 0
5 BD-03 3746 PM* 15 13 59.6414488565 -03 47 52.795339623   10.98 9.85     K4 92 0
6 V* SS Cyg CV* 21 42 42.8034554117 +43 35 09.863763484 11.07 8.2 7.70     K5V 1235 1

    Equat.    Gal    SGal    Ecl

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2021.07.29-23:51:39

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