2002A&A...396..539J


Query : 2002A&A...396..539J

2002A&A...396..539J - Astronomy and Astrophysics, volume 396, 539-550 (2002/12-3)

Long-term photometric behaviour of XZ Dra. Binarity or magnetic cycle of a Blazhko-type RRab star.

JURCSIK J., BENKO J.M. and SZEIDL B.

Abstract (from CDS):

The extended photometry available for XZ Dra, a Blazhko-type RR Lyrae star, makes it possible to study its long-term behavior. It is shown that its pulsation period exhibits cyclic, but not strictly regular variations with ≃7200d period. The Blazhko period (≃76d) seems to follow the observed period changes of the fundamental mode pulsation with dPB/dP0=7.7x104 gradient. A binary model cannot explain this order of period change of the Blazhko modulation, nevertheless it can be brought into agreement with the O-C data of the pulsation. The possibility of occurrence of a magnetic cycle is raised.

Abstract Copyright:

Journal keyword(s): stars: individual: XZ Dra - stars: variables: RR Lyr - stars: oscillations - stars: horizontal-branch - techniques: photometric - techniques: radial velocities

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 - 2022
#notes
1 V* TU UMa RR* 11 29 48.4893885624 +30 04 02.379416844 9.56 9.41 9.26     kA2hA9.5 212 0
2 V* RV UMa RR* 13 33 18.0838837128 +53 59 14.598026988   10.97 10.9     kA9hF7 164 0
3 V* AR Her RR* 16 00 32.2322114376 +46 55 25.754534400   11.74 11.40     kA7hF3 128 0
4 V* RW Dra RR* 16 35 31.6036225488 +57 50 23.167269564   11.87 11.48     kA7hF6.5 152 0
5 V* XZ Dra RR* 19 09 42.6071961192 +64 51 32.137892820   10.40 10.12     kA3.5hA8 143 0
6 V* XZ Cyg RR* 19 32 29.3050827744 +56 23 17.494181700   9.94 9.68     kA1.5hA8 254 0

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2022.05.22-00:26:57

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