TY - JOUR
T1 - High resolution soft X-ray spectroscopy of M 87 with the reflection grating spectrometers on XMM-Newton
AU - Sakelliou, Irini
AU - Peterson, JR
AU - Tamura, T
AU - Paerels, FBS
AU - Kaastra, JS
AU - Belsole, E
AU - Bohringer, H
AU - Branduardi-Raymont, G
PY - 2002/9/1
Y1 - 2002/9/1
N2 - We present high-resolution X-ray spectroscopic observations of M 87 with the Reflection Grating Spectrometers on XMM-Newton. We detect strong K-shell line emission from N, O, Ne, Mg, some emission from He-like Si, a fully resolved set of Fe L-shell emission spectra, and some emission from C. The angular intensity distributions of the strong emission lines are detectably resolved on scales (15-160)". The gas in the inner arcmin of M 87 has a multi-phase structure, as indicated by the similarity of the emission line profiles of Fe L shell ions with widely separated ionization potentials. The global Fe L spectrum is approximately consistent with an isothermal plasma at kT(e) similar to 1.8 keV, in addition to a component with a temperature distribution appropriate to an isobaric cooling flow, but with a minimum temperature cutoff of kT(min) approximate to 600 eV. The behaviour of this cooling-flow component is qualitatively similar to what is seen in other cooling flow clusters. Finally, we do not find any strong evidence for a spatial variation in abundances due to resonance scattering redistribution in the inner arcminute of the core.
AB - We present high-resolution X-ray spectroscopic observations of M 87 with the Reflection Grating Spectrometers on XMM-Newton. We detect strong K-shell line emission from N, O, Ne, Mg, some emission from He-like Si, a fully resolved set of Fe L-shell emission spectra, and some emission from C. The angular intensity distributions of the strong emission lines are detectably resolved on scales (15-160)". The gas in the inner arcmin of M 87 has a multi-phase structure, as indicated by the similarity of the emission line profiles of Fe L shell ions with widely separated ionization potentials. The global Fe L spectrum is approximately consistent with an isothermal plasma at kT(e) similar to 1.8 keV, in addition to a component with a temperature distribution appropriate to an isobaric cooling flow, but with a minimum temperature cutoff of kT(min) approximate to 600 eV. The behaviour of this cooling-flow component is qualitatively similar to what is seen in other cooling flow clusters. Finally, we do not find any strong evidence for a spatial variation in abundances due to resonance scattering redistribution in the inner arcminute of the core.
KW - galaxies : individual : M 87
KW - galaxies : cooling flows
KW - X-rays : galaxies
KW - galaxies : clusters : individual : virgo
KW - galaxies : clusters : general
KW - galaxies : abundances
UR - http://www.scopus.com/inward/record.url?scp=0036725447&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20020900
DO - 10.1051/0004-6361:20020900
M3 - Article
SN - 0004-6361
VL - 391
SP - 903
EP - 909
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 3
ER -