منابع مشابه
Metal-rich multi-phase gas in M87 AGN-driven metal transport, magnetic-field supported multi-temperature gas, and constraints on non-thermal emission observed with XMM-Newton
We use deep (∼120 ks) XMM-Newton data of the M87 halo to analyze its spatially resolved temperature structure and chemical composition. We focus particularly on the regions of enhanced X-ray brightness associated with the inner radio lobes, which are known not to be described very well by single-temperature spectral models. Compared to a simple twotemperature fit, we obtain a better and more ph...
متن کاملOn the metal abundance in the core of M 87
We revisit the XMM-Newton observation of M87 to make a new and more detailed measurement of the metal abundance profile. After having verified that spectral fits with single temperature models show a dramatic abundance drop within 1 arcmin of the cluster core, we show that more appropriate models, which include a multi-temperature component to account for the strong temperature gradient observe...
متن کاملIn-flight gas phase growth of metal/multi layer graphene core shell nanoparticles with controllable sizes
In this report, we present a general method for a continuous gas-phase synthesis of size-selected metal/multi layer graphene (MLG) core shell nanoparticles having a narrow size distribution of metal core and MLG shell for direct deposition onto any desired substrate kept under clean vacuum conditions. Evolution of MLG signature is clearly observed as the metal-carbon agglomerates get transforme...
متن کاملThe inner accretion disk in M 87
The observed AGN in M87 is extremely quiescent compared to expectations based upon simple estimates for the mass accretion rate. We examine the possibility that the nal stages of accretion are advection dominated by comparing current observational constraints on the ux from the M87 core to the predictions of an advection dominated accretion ow (ADAF) model. We nd that the observed self-absorbed...
متن کاملThe “ quiescent ” black hole in M 87
It is believed that most giant elliptical galaxies possess nuclear black holes with masses in excess of 10 M⊙. Bondi accretion from the interstellar medium might then be expected to produce quasar-like luminosities from the nuclei of even quiescent elliptical galaxies. It is a puzzle that such luminosities are not observed. Motivated by this problem, Fabian & Rees have recently suggested that t...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20078749