2001A&A...378..102K


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.30CET03:32:23

2001A&A...378..102K - Astronomy and Astrophysics, volume 378, 102-112 (2001/10-4)

Spectroscopic and photometric observations of the short-period RS CVn star RT And.

KJURKCHIEVA D.P., MARCHEV D.V. and OGLOZA W.

Abstract (from CDS):

Spectroscopic observations in the range 6500-6700Å and BVRI photometry of the eclipsing short-period RS CVn-star RT And are presented. We determined K1=130km/s and K2=175.8km/s by measurement of the double profiles of the lines Hα and FeI 6678, and obtained the mass ratio q=0.74 and masses of the star components M1=1.23M and M2=0.91M. It was established that the emission activity of RT And is associated with its secondary component. The relative contribution of the secondary star is stronger in the FeI 6678 line than in Hα. A strong emission feature between the two profiles of FeI 6678 at phase 0.73 was detected that is probably due to the appearance of extended emitting structure. The multicolor light curve of RT And is fitted by two cool spots on the primary star with equal sizes 21° and temperatures 4980 K and located at middle latitudes and longitudes symmetrical to the line connecting the star centers. Both spectral and photometric data lead to the conclusion that the secondary star of RT And is oversized for its mass.

Abstract Copyright:

Journal keyword(s): stars: activity - binaries: eclipsing - binaries: spectroscopic - stars: chromospheres - stars: individual: RT And - stars: starspots

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* UV Psc bL* 01 16 55.1192705826 +06 48 42.131128899   9.73 9.01   8.223 G5 239 0
2 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 665 0
3 V* SV Cam Al* 06 41 19.0820839974 +82 16 02.435978987       9.0   G2IV-V 347 0
4 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 447 0
5 V* WY Cnc RS* 09 01 55.4509744645 +26 41 22.747100853 10.54 10.34 9.60     G5V 191 0
6 V* XY UMa RS* 09 09 55.9355245408 +54 29 17.725267002       9.620   G5 240 0
7 V* DH Leo RS* 10 00 01.7102607868 +24 33 10.098116028   9.47 7.982 7.3 6.898 K0Vk 153 0
8 V* Z Her RS* 17 58 06.9787072966 +15 08 21.909354791   7.86 7.30     F8V 271 0
9 V* V1762 Cyg RS* 19 08 25.7904391348 +52 25 32.630339536   6.982 5.893     K1IV 197 0
10 HD 218915 s*b 23 11 06.9480376287 +53 03 29.651927910 6.32 7.22 7.20     O9.2Iab 185 1
11 V* RT And RS* 23 11 10.0981467675 +53 01 33.031477014   9.58 9.043 8.73   F8V+G0-K1-3V 364 0
12 HD 219038 * 23 12 12.8545585167 +52 48 51.205129777   8.59 8.55     A0 3 0
13 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 685 0

    Equat.    Gal    SGal    Ecl

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2020.10.30-03:32:23

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