Neutrino and axion bounds from the globular cluster M5 (NGC 5904)

Neutrino and axion bounds from the globular cluster M5 (NGC 5904)

The red-giant branch (RGB) in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in "dark channels." Based on a large set of archival observations, we provide high-precision photometry for the Galactic globular cluster M5 (NGC 5904), allo...

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Veröffentlicht in:Physical review letters 2013-12, Vol.111 (23), p.231301-231301, Article 231301
Hauptverfasser: Viaux, N, Catelan, M, Stetson, P B, Raffelt, G G, Redondo, J, Valcarce, A A R, Weiss, A
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Sprache:eng
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Zusammenfassung:The red-giant branch (RGB) in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in "dark channels." Based on a large set of archival observations, we provide high-precision photometry for the Galactic globular cluster M5 (NGC 5904), allowing for a detailed comparison between the observed tip of the RGB with predictions based on contemporary stellar evolution theory. In particular, we derive 95% confidence limits of g(ae)
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.111.231301