Variable Stars in Palomar 13; an Evaporating Globular Cluster

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7892

Title:	Variable Stars in Palomar 13; an Evaporating Globular Cluster
Authors:	Yepez, M. A Ferro, A. Arellano Schröder, K. P. Muneer, S Giridhar, Sunetra Allen, Christine
Issue Date:	Jun-2021
Publisher:	Astronomical Society of the Pacific
Citation:	ASP Conference Series, Vol. 529, pp. 184-188
Abstract:	We present new CCD VI photometry of the globular cluster Pal 13. Fourier decomposition of the light curves of RRab stars lead to estimations of [Fe/H]ZW = -1.65±0.15, and a distance to the cluster of 23.67±0.57 kpc. A colour-magnitude diagram, built exclusively with likely star members, shows consistency with the above parameters and an age of 12 Gyrs. A search of variable stars in the field of view of our images revealed the variability of a red giant cluster member and of three probably non-member stars: two RRab and one BL Her star. The Gaia-DR2 proper motions of member stars in Pal 13 show a significant scatter, consistent with the scenario of the cluster being tidally stripped.
Description:	Restricted access
URI:	http://hdl.handle.net/2248/7892
Appears in Collections:	IIAP Publications

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