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- W82757991 abstract "University of Helsinki, P.O. Box 14, SF-00014 Helsinki, FinlandAbstract.We present an analysis of our deep far- (FUV) and near-ultraviolet (NUV) photom-etry of the core region of the dense globular cluster M15. Our FUV-NUV colour-magnitudediagram (CMD) is the deepest one presented for a globular cluster so far, and shows all hot stel-lar populations expected in a globular cluster, such as horizontal branch stars, blue stragglers,white dwarfs, cataclysmic variables and even main sequence stars. The main sequence turn-offis clearly visible and the main sequence stars form a prominent track that extends at least twomagnitudes below the main sequence turn-off. We compare and discuss the radial distributionof the various stellar populations that show up in the FUV. We search for variability amongstour FUV sources and tentatively classify our variable candidates based on an analysis of the UVcolours and variability properties. We find that RR Lyraes, Cepheids, and SX Phoenicis exhibitmassive variability amplitudes in this waveband (several mags).Keywords.globularclusters:individual(M15),stars:cataclysmicvariables,whitedwarfs,stars:variables: other, ultraviolet: stars, blue stragglers, binaries: close" @default.
- W82757991 created "2016-06-24" @default.
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- W82757991 date "2006-08-01" @default.
- W82757991 modified "2023-10-16" @default.
- W82757991 title "Unveiling the Core Of M15 In The Far-Ultraviolet" @default.
- W82757991 hasPublicationYear "2006" @default.
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