dc.contributor.author |
Yepez, M. A |
|
dc.contributor.author |
Ferro, A. A |
|
dc.contributor.author |
Schoeder, K. P |
|
dc.contributor.author |
Muneer, S |
|
dc.contributor.author |
Giridhar, S |
|
dc.contributor.author |
Allen, C |
|
dc.date.accessioned |
2020-11-19T13:51:43Z |
|
dc.date.available |
2020-11-19T13:51:43Z |
|
dc.date.issued |
2019-08 |
|
dc.identifier.citation |
New Astronomy, Vol. 71, pp. 1-11 |
en_US |
dc.identifier.issn |
1384-1076 |
|
dc.identifier.uri |
http://prints.iiap.res.in/handle/2248/7269 |
|
dc.description |
Restricted Access © Elsevier B.V https://doi.org/10.1016/j.newast.2019.02.006 |
en_US |
dc.description.abstract |
We present new CCD VI photometry of the distant globular cluster Pal 13. Fourier decomposition of the light curves of the three cluster member RRab stars lead to estimations of [Fe/H] = −1.65, and a distance of 23.67 ± 0.57 kpc. Light and colour near minimum phases for RRab stars leads to an estimate of ± 0.001. 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 stars and one W Virginis star or CW. The GAIA proper motions of member stars in Pal 13 show a significant scatter, consistent with the scenario of the cluster being tidally stripped. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier B.V |
en_US |
dc.subject |
Globular clusters |
en_US |
dc.subject |
Individual (Pal 13) - stars |
en_US |
dc.subject |
Variables |
en_US |
dc.subject |
RR Lyrae |
en_US |
dc.title |
Variable stars in Palomar 13; an evaporating globular cluster |
en_US |
dc.type |
Article |
en_US |