http://arxiv.org/abs/2212.07355
We report the classification of 24 puzzling short-period variable stars located in OGLE-IV Galactic bulge fields. The stars are low-amplitude (<0.05 mag) multi-periodic objects with dominant periods between 22 and 54 min whose type could not have been unambiguously established based on photometry only. A low-resolution spectroscopic follow-up has shown that all the objects are main sequence A/F-type stars. Thus, all the variables are delta Sct-type pulsators. We have added them to the OGLE-IV Collection of Variable Stars.
P. Pietrukowicz, M. Ratajczak, I. Soszynski, et. al.
Thu, 15 Dec 22
54/75
Comments: The OGLE data are available at this https URL