1999A&AS..138..203P


Query : 1999A&AS..138..203P

1999A&AS..138..203P - Astron. Astrophys., Suppl. Ser., 138, 203-211 (1999/August-0)

New BVR photometry of six prominent RS Canum Venaticorum binaries.

PADMAKAR and PANDEY S.K.

Abstract (from CDS):

A new BVR photometry of six prominent RS CVn stars: V711 Tau, UX Ari, IM Peg, II Peg, σ Gem and λ And, carried out during 1995-97, is presented. The new results reveal significant evolution in the shape as well as in the amplitude of light curves of these binaries. The traditional two-starspot model has been used to obtain the spot parameters from the observed light curves of the stars. Changes in spot area and their location on stellar surface can be noticed from extracted spot parameters. Some of these stars are found to have significant variation in (B-V) and (V-R) colour indices. The (V-R) colour index variation found in IM Peg, II Peg and λ And have been used for determining starspot effective temperatures.

Abstract Copyright:

Journal keyword(s): stars: variables - stars: binaries: close stars: activity - stars: chromosphere - starspots

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 - 2023
#notes
1 V* UX Ari RS* 03 26 35.3756804760 +28 42 54.226408428 7.76 7.28 6.37     K0IV 683 0
2 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.79 5.90 5.4   K2:Vnk 1152 0
3 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 467 0
4 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 327 1
5 * lam And RS* 23 37 33.8427800830 +46 27 29.344721109 5.54 4.84 3.82 3.04 2.47 G8IVk 655 0
6 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 715 0

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2023.02.04-10:20:00

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