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


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.02CET11:51:31

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 - 2021
#notes
1 V* TU UMa RR* 11 29 48.4896121348 +30 04 02.380342849 9.56 9.41 9.26     F2 206 0
2 V* RV UMa RR* 13 33 18.0839321976 +53 59 14.600235593   10.97 10.9     F0 158 0
3 V* AR Her RR* 16 00 32.2326086303 +46 55 25.747518105   11.74 11.40     A9.5 122 0
4 V* RW Dra RR* 16 35 31.6039215643 +57 50 23.169223443   11.87 11.48     A5 147 0
5 V* XZ Dra RR* 19 09 42.6074440363 +64 51 32.134269050   10.40 10.12     F0 138 0
6 V* XZ Cyg RR* 19 32 29.3054833102 +56 23 17.494421260   9.94 9.68     A5-F7 248 0

    Equat.    Gal    SGal    Ecl

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2020.12.02-11:51:31

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