2001A&A...366..202O


Query : 2001A&A...366..202O

2001A&A...366..202O - Astronomy and Astrophysics, volume 366, 202-209 (2001/1-4)

A spectroscopic study of the eclipsing binaries SV Camelopardalis and XY Ursae Majoris.

OEZEREN F.F., GUNN A.G., DOYLE J.G. and JEVREMOVIC D.

Abstract (from CDS):

High-resolution spectroscopic observations of the eclipsing RS CVn-type active close binaries SV Camelopardalis and XY Ursae Majoris reveal excess emission components in the Hα and Hβ lines. We have used the spectral subtraction technique to separate the excess emission from the photospheric background and find that in both stars the excess emission is associated with the secondary, cooler component. Analysis of the EW/EW ratio indicates that in both cases the emission is probably associated with surface plage regions or prominences viewed against the stellar disks. We find no evidence of excess absorption features associated with extended prominence-like material in these systems.

Abstract Copyright:

Journal keyword(s): star: binaries: spectroscopic - stars: RS CVn, BY Dra binaries - stars: late type - stars: chromospheres of - stars: magnetic fields

Simbad objects: 10

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Number of rows : 10
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 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1137 0
2 V* V471 Tau EB* 03 50 24.9664598642 +17 14 47.433240686   10.258 9.373   8.393 K2V+DA 625 0
3 HD 24451 PM* 04 01 19.6243098203 +76 09 33.745858790   9.39   7.5   K4 81 0
4 V* AB Dor TT* 05 28 44.8916324761 -65 26 55.289846904 8.259 7.856 6.999 6.496 5.993 K0V 955 0
5 HD 42807 RS* 06 13 12.5027477683 +10 37 37.713412362   7.12   6.0   G5V 213 0
6 V* SV Cam EB* 06 41 19.0820839974 +82 16 02.435978987       9.0   G2IV-V 350 0
7 V* GK Hya RS* 08 30 49.3103508876 +02 16 26.596270587   10.10 9.37   8.569 G4V 82 0
8 V* XY UMa RS* 09 09 55.9355245408 +54 29 17.725267002       9.620   G5 243 0
9 HD 200391 Ae* 21 02 25.9068825509 +27 48 26.439773330   7.93 7.374   6.624 G0V+G5V 344 0
10 V* HK Aqr BY* 23 08 19.5510988144 -15 24 35.768241707 13.4 12.282 10.872 9.964 9.019 M0Ve 186 0

    Equat.    Gal    SGal    Ecl

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2021.07.29-02:59:35

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