The Unusual RR Lyrae Population of NGC 6101

Details The Unusual RR Lyrae Population of NGC 6101 The Unusual RR Lyrae Population of NGC 6101

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...727....9c&link_type=abstract

The Astrophysical Journal, Volume 727, Issue 1, article id. 9 (2011).

Astronomy and Astrophysics

Astronomy

Galaxy: Kinematics And Dynamics, Globular Clusters: Individual: Ngc 6101, Stars: Horizontal-Branch, Stars: Variables: Rr Lyrae

Scientific paper

We use V-band time-series data to analyze the RR Lyrae (RRL) population of the Galactic globular cluster NGC 6101. Using template fitting, we have discovered seven new RRL stars and confirmed 10 candidates. We find unusually long mean periods for the RRL of langPab rang = 0.803 days and langPc rang = 0.393 days, and an atypically high ratio of n(c)/n(ab + c) = 0.82. Based on our derived mean properties of the RRL, NGC 6101 is Oosterhoff type II, consistent with the cluster metallicity but intriguing with respect to its kinematics.
This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency.

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