UX Tri: Period Change Discovered and Unchanged Strong Blazhko Effect Confirmed

Details UX Tri: Period Change Discovered and Unchanged Strong Blazhko Effect Confirmed UX Tri: Period Change Discovered and Unchanged Strong Blazhko Effect Confirmed

2006-07-21

arxiv.org/abs/astro-ph/0607503v1

Astronomy and Astrophysics

Astrophysics

PDF, 10 pages, 1 table, 8 figures (5 color, 3 b/w), 1 appendix (2 pages)

Scientific paper

New CCD observations of the RRab star UX Tri after JD = 2452234 show a change of the main pulsation period. The period is now P = 0.4669046 +/- 0.0000006 [d]. The change is delta_P = - 1.72 x 10-5 [d] if compared with the value we previously published in IBVS 5210. A strong Blazhko effect with unchanged Blazhko period P_B = 43.7 +/- 0.1 [d] is confirmed by this paper. Light curve particularities around Blazhko phase phi_B = 0.0 are discussed in detail. In one observation (JD 2453617) related to Blazhko phase phi_B = 0.12 an exceptionally pronounced "bump" of delta_m > -0.1 magnitude was observed at pulsation phase phi = 0.71.

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