Thermo-dynamic and chemical properties of the Intra-Cluster Medium (2009)
Leccardi, Alberto, Rossetti, Mariachiara, Molendi, Silvano
Aims. We aim to provide constraints on evolutionary scenarios in clusters. One of our main goals is to understand whether, as claimed by some, the cool core/non-cool core division is established once...
Non-thermal emission in the core of Perseus: results from a long XMM-Newton observation (2008)
Molendi, Silvano, Gastaldello, Fabio
We employ a long XMM-Newton observation of the core of the Perseus cluster to validate claims of a non-thermal component discovered with Chandra. From a meticulous analysis of our dataset, which...
Clusters outskirts at X-ray wavelengths: current status and future prospects (2004)
A solid observational characterization of cluster regions around the virial radius would allow us to improve considerably our understanding of the physics of galaxy clusters as a whole: sadly current...
The Intra-Cluster Medium (2004)
The Intra-Cluster Medium (ICM) is a rarefied, hot, highly ionized, metal rich, weakly magnetized plasma. In these proceeding, after having reviewed some basic ICM properties, I discuss recent results...
Radiative cooling, heating and thermal conduction in M87 (2004)
Ghizzardi, Simona, Molendi, Silvano, Pizzolato, Fabio, De Grandi, Sabrina
The crisis of the standard cooling flow model brought about by Chandra and XMM-Newton observations of galaxy clusters, has led to the development of several models which explore different heating...
The 2-8 keV cosmic X-ray background spectrum as observed with XMM-Newton (2003)
De Luca, Andrea, Molendi, Silvano
We have measured the spectrum of the Cosmic X-ray Background (CXB) in the 2-8 keV range with the high throughput EPIC/MOS instrument onboard XMM-Newton. A large sample of high galactic latitude...
On the Iron content in rich nearby Clusters of Galaxies (2003)
De Grandi, Sabrina, Ettori, Stefano, Longhetti, Marcella, Molendi, Silvano
In this paper we study the iron content of a sample of 22 nearby hot clusters observed with BeppoSAX. We find that the global iron mass of clusters is tightly related to the cluster luminosity and...
The high energy emission line spectrum of NGC 1068 (2003)
Matt, Giorgio, Bianchi, Stefano, Guainazzi, Matteo, Molendi, Silvano
We present and discuss the high energy (E>4 keV) XMM-Newton spectrum of the Seyfert 2 galaxy, NGC 1068. Possible evidence for flux variability in both the neutral and ionized reflectors with respect...
Gastaldello, Fabio, Molendi, Silvano
Using an XMM-Newton observation of the Perseus cluster we show that the excess in the flux of the 7-8 keV line complex previously detected by ASCA and BeppoSAX is due to an overabundance of Nickel...
Iron and Nickel properties in the X-ray reflecting region of the Circinus Galaxy (2003)
Molendi, Silvano, Bianchi, Stefano, Matt, Giorgio
We discuss the iron and nickel properties in the nuclear X-ray reflecting region of the Circinus Galaxy, studied with XMM-Newton. The main results are: a) from the depth of the Fe Kalpha edge, a...
On the Temperature Structure of M87 (2002)
We revisit the XMM-Newton observation of M87 focusing our attention on the temperature structure. We find that spectra for most regions of M87 can be adequately fit by single temperature models. Only...
Abundance gradients and the role of SNe in M87 (2002)
Gastaldello, Fabio, Molendi, Silvano
We make a detailed measurement of the metal abundance profiles and metal abundance ratios of the inner core of M87/Virgo observed by XMM-Newton during the PV phase. We use multi temperature models...
Abundance gradients and the role of SNe in M87/Virgo (2002)
Gastaldello, Fabio, Molendi, Silvano
We make a detailed measurement of the metal abundance profiles and metal abundance ratios of the inner core of M87/Virgo observed by XMM-Newton during the PV phase. We use multi temperature models...
Wilms, Joern, Reynolds, Christopher S., Begelman, Mitchell C., Reeves, James, Molendi, Silvano, Stuabert, Ruediger, ...
We present XMM-Newton European Photon Imaging Camera (EPIC) observations of the bright Seyfert 1 galaxy MCG-6-30-15, focusing on the broad Fe K$\alpha$ line at ~6keV and the associated reflection...
Temperature Profiles of Nearby Clusters of Galaxies (2001)
De Grandi, Sabrina, Molendi, Silvano
We report results from the analysis of 21 nearby galaxy clusters, 11 with cooling flow (CF) and 10 without cooling flow, observed with BeppoSAX. The temperature profiles of both CF and non-CF systems...
The chemical enrichment of the ICM with BeppoSAX (2001)
De Grandi, Sabrina, Molendi, Silvano
We review observations on the chemical enrichment of the intracluster medium (ICM) performed using BeppoSAX MECS data. The picture emerging is that non-cooling flow clusters have flat metallicity...
Is the gas in cooling-flows multi-phase? (2001)
Molendi, Silvano, Pizzolato, Fabio
Employing XMM-Newton EPIC data we perform a detailed comparison between different spectral models to test whether the gas in cooling-flows is multi-phase or not. Our findings all point in the same...
On the metal abundance in the core of M87 (2001)
Molendi, Silvano, Gastaldello, Fabio
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...
Metallicity Gradients in X-ray Clusters of Galaxies (2000)
De Grandi, Sabrina, Molendi, Silvano
We present the projected metallicity profiles for a sample of 17 rich galaxy clusters observed by BeppoSAX. We find that the 8 non-cooling flow clusters have flat metallicity profiles. On the...
Interaction in Abell 2256: the BeppoSAX view (2000)
Molendi, Silvano, De Grandi, Sabrina, Fusco-Femiano, Roberto
We present results from a spatially resolved spectral analysis of the merging cluster Abell 2256. The long integration time (135 ks) and the good spatial resolution of the MECS onboard BeppoSAX allow...
Spatially resolved spectroscopy of the cooling flow cluster PKS 0745-191 with BeppoSAX (1999)
De Grandi, Sabrina, Molendi, Silvano
We present results from a BeppoSAX observation of the cooling flow cluster PKS 0745-191 (z=0.1028). By performing spatially resolved spectroscopy, we find that the projected temperature profile is...
A BeppoSAX observation of the merging cluster Abell 3266 (1999)
De Grandi, Sabrina, Molendi, Silvano
We present results from a BeppoSAX observation of the rich cluster Abell 3266. The broad band spectrum (2-50 keV) of the cluster, when fitted with an optically thin thermal emission model, yields a...
A BeppoSAX observation of the cooling flow cluster Abell 2029 (1999)
Molendi, Silvano, De Grandi, Sabrina
We present results from a BeppoSAX observation of the cooling flow cluster Abell 2029. The broad band spectrum (2-35 keV) of the cluster, when fitted with a model including a cooling flow component...
ROSAT observations of radio-selected BL Lac objects (1995)
Comastri, Andrea, Molendi, Silvano, Ghisellini, Gabriele
ROSAT observations of a homogeneous sample of radio--selected BL Lac objects are presented. Results of a detailed spectral analysis in the soft 0.1-2.0 keV energy range are discussed and compared...