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Conference papers

The XMM-Newton view of the Central degree of the Galaxy

G. Ponti M. Morris F. Haberl M. Clavel 1, 2 R. Terrier 1 R. Sturm S. Soldi 1 T. Dwelly A. Goldwurm 1, 2 V. Tatischeff 3
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
Abstract : We will present new soft and hard X-ray mosaics, including over 100 XMM-Newton observations pointed within 1degree of SgrA*. Both soft X-ray continuum and emission lines (Sixiii, Sxv, Arxvii and Caxix) maps will be described. We will discuss the nature of several extended features in the vicinity of SgrA*. This includes the 20-pc scale bipolar lobes, a super bubble candidate and the soft emission peaking around G0.11-0.11. The data reveal several features having considerable extents in Galactic latitude, suggesting the presence of hot plasma overlying the Central Molecular Zone (CMZ). We will discuss the spatial relationship of this plasma to known radio/mid-IR features as well as the question of whether this hot gas is an inhomogeneous "atmosphere" over the CMZ or whether it is a reservoir for much larger-scale-features that represent continuous/episodic outflows of mass and energy from the Galactic center. We will also present the FeKalpha, Fexxv and hard X-ray continuum maps. By examining X-ray reflecting clouds of the CMZ and their fluorescent FeKalpha emission, we can place constraints on SgrA*'s X-ray activity during the past millennium. The comparison between surveys performed between 2000 and 2012 shows a general decay of the reflected emission over the past decade.
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Submitted on : Thursday, September 25, 2014 - 12:44:57 PM
Last modification on : Monday, December 13, 2021 - 9:15:23 AM



G. Ponti, M. Morris, F. Haberl, M. Clavel, R. Terrier, et al.. The XMM-Newton view of the Central degree of the Galaxy. "The X-ray Universe 2014" Symposium, Jun 2014, Dublin, Ireland. ⟨in2p3-01068281⟩



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