2005/02/22 by J. Kaluzny, P. Pietrukowicz, I. B. Thompson +4
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2005.08940.x
published as Mon.Not.Roy.Astron.Soc. 359 (2005) 677-682 · 6 pages, 6 figures, accepted for publication in MNRAS
arxiv created 2005/02/22 · openalex publication_date 2005/04/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We report the detection of a dwarf nova (DN) in the core region of the globular cluster M55. Six outbursts were observed during eight observing seasons spanning the period 1997–2004. The variable has an X-ray counterpart detected on images taken with the ROSAT telescope. Although we cannot offer proof of cluster membership, one can see that both the position on the Hertzsprung–Russell diagram and the X-ray flux are consistent with a bright DN at the cluster distance. According to our outburst statistics, no more than one similar DN could remain undetected in our field of view, centred at the cluster core.