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Astron. Astrophys. 341, 23-28 (1999)


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Detection of filamentary X-ray structure in the core of the Shapley supercluster

A. Kull 1,2 and H. Böhringer 1

1 Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany
2 Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA

Received 29 July 1998 / Accepted 29 September 1998

Abstract

We report on X-ray observations of the core of the Shapley Supercluster. Combining data from pointed observations of the ROSAT PSPC detector and data from the ROSAT All-Sky Survey, the observed region covers an area of [FORMULA]. It contains the central clusters A3562, A3558 and A3556.

We find clear evidence for X-ray emission connecting the three clusters. This confirms the existence of a filamentary, physical structure embedding the three clusters A3562, A3558 and A3556. We also find evidence for faint emission westwards of A3556. In total, the extension of the filamentary X-ray emission of the core of the Shapley Supercluster amounts up to at least [FORMULA] Mpc. The total luminosity in the 0.1-2.4 keV energy band is [FORMULA] erg s-1.

Key words: galaxies: clusters: general – cosmology: large-scale structure of Universe – X-rays: galaxies

Present address: Canadian Institute for Theoretical Astrophysics, 60 St. George Street, Toronto, M5S 1A7, Canada

Send offprint requests to: kull@cita.utoronto.ca

© European Southern Observatory (ESO) 1999

Online publication: November 26, 1998

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