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4 papers · 2 filters
Searching for tidal tails around Centauri using RR Lyrae Stars
J. G. Fernández-Trincado, A. K. Vivas, C. E. Mateu +5
We present a survey for RR Lyrae stars in an area of 50 deg around the globular cluster Centauri, aimed to detect debris material from the alleged progenitor galaxy of the…
The Carina Project VII: Towards the breaking of the age-metallicity degeneracy of red giant branch stars using the c_UBI index
M. Monelli, A. P. Milone, M. Fabrizio +13
We present an analysis of photometric and spectroscopic data of the Carina dSph galaxy, testing a new approach similar to that used to disentangle multiple populations in Galactic…
A Spectroscopic Search for High Mass X-ray Binaries in M31
Benjamin F. Williams, Despina Hatzidimitriou, Jerica Green +6
We present new optical spectroscopy of 20 candidate counterparts of 17 X-ray sources in the direction of the M31 disc. By comparing the X-ray catalogue from the XMM-Newton survey o…
A comprehensive view of the Virgo Stellar Stream
Sonia Duffau, A. Katherina Vivas, Robert Zinn +2
Radial velocities and metallicities have been measured for 82 RR Lyrae identified by the QUEST survey in the direction of the Virgo constellation. Distributed over 90 sq. deg. of t…