Jurcsik, Johanna and Benkő, József and Szeidl, Béla (2002) Long-term photometric behaviour of XZ Dra : Binarity or magnetic cycle of a Blazhko-type RRab star. ASTRONOMY & ASTROPHYSICS, 396 (2). pp. 539-550. ISSN 0004-6361
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Abstract
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 approximate to7200 d period. The Blazhko period (approximate to76 d) seems to follow the observed period changes of the fundamental mode pulsation with dP(B)/dP(0) = 7.7 x 10(4) 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.
| Item Type: | Article |
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| Uncontrolled Keywords: | techniques : photometric; stars : oscillations; stars : individual : XZ Dra; stars : variables : RR Lyr; stars : horizontal-branch; techniques : radial velocities; |
| Subjects: | Q Science / természettudomány > QB Astronomy, Astrophysics / csillagászat, asztrofizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 18 Mar 2026 15:11 |
| Last Modified: | 18 Mar 2026 15:11 |
| URI: | https://real.mtak.hu/id/eprint/235922 |
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