A CCD Search for Variable Stars of Spectral Type B in the Northern Hemisphere Open Clusters. VII. NGC 1502

作者：Michalska G^*; Pigulski A; Steslicki M; Narwid A

来源：Acta Astronomica, 2009, 59(4): 349-370.

• Stars: early-type
• Stars: emission-line, Be
• open clusters and associations: individual: NGC 1502

We present results of variability search in the field of the young open cluster NGC 1502. Eight variable stars were discovered. Of six other stars in the observed field that were suspected for variability, we confirm variability of two, including one beta Cep star, NGC 1502-26. The remaining four suspects were found to be constant in our photometry. In addition, UBVI(C) photometry of the well-known massive eclipsing binary SZ Cam was obtained.
The new variable stars include: two eclipsing binaries of which one is a relatively bright detached system with an EA-type light Curve, an alpha(2) CVn-type variable, an SPB candidate, a field RR Lyr star and three other variables showing variability Of unknown origin. The variability of two of them is probably related to their emission in H alpha, which has been measured by means of the alpha index obtained for 57 stars brighter than V approximate to 16 mag in the central part of the observed field. Four other non-variable stars with emission in H alpha were also found.
Additionally, we provide VI(C) photometry for stars down to V = 17 mag and UB photometry for about 50 brightest stars in the observed field.

• 出版日期2009