Hot and Cold Gas in Sgr A - The XMM-Newton View

Peter Predehl1, Bernd Aschenbach1, Günther Hasinger1, Wolfgang Duschl2, Anne Decourchelle3, Andrea Goldwurm3

1 Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching, Germany
2 Institut für Theoretische Astrophysik, Universität Heidelberg, Tiergartenstrasse 15, D-69121 Heidelberg, Germany
3 Service d'Astrophysique, Orme des Merisiers, CE-Saclay, 91191 Gif-sur-Yvette, CEDEX, France

E-mail contact: predehl@mpe.mpg.de

A region of 17arcmin x 17 armin around Sgr A East was observed with XMM-Newton for 50ks on 26 February 2002. Thanks to the suberb energy resolution of the three cameras (1 PN, 2 MOS) and the throughput of the telescopes even at energies as high as 10keV, the region could be mapped with excellent statistics in all relevant spectral lines (S XV, Ar XII, Ca XIX, neutral FE Kalpha, Fe XXV, and even Fe XXVI). The resulting temperature maps pose questions on both the origin of the diffuse emission on larger scales as well as some aspects regarding the current model for Sgr A East. Highly structured fluorescent Fe-emission a few armins north-east of Sgr A East was found. We are investigating coincidences with known molecular clouds in order to constrain the geometry within the widely accepted picture of nuclear activity several 100 years ago. Unlike in all other recent observations with both Chandra and XMM-Newton, Sgr A* remained quiet during our observation.