Studij dinamike zvezdne snovi med dogodkom plimskega raztrganja

Autor: Clerici, Aurora

The number of observed tidal disruption events is increasing rapidly with the advent of new surveys. Thus, it is becoming increasingly important to improve TDE models using different stellar and orbital parameters. We study the dynamical behaviour of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3507::25668f140e4ec33e9240822732515850
https://hdl.handle.net/20.500.12556/RUNG-5853

Apart Cen A are UHECR mostly heavy radioactive and galactic nuclei?

Autor: Daniele Fargion

Earliest AUGER UHECR anisotropy correlated with AGN within a GZK Universe almost fade away. Recent UHECR mass compositions did show a negligible nucleon composition and an UHECR nuclei (light or heavy) signature. The absence of UHECR events toward th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::703c5c776357eac1c248ea896b0156cb
http://arxiv.org/abs/1112.6388

Fe Kα Line in the Integrated Spectrum of Serendipitous 2XMM Catalog Sources

Autor: Andrea Comastri, Marcella Brusa, Andrea Merloni, P. Chaudhary, G. Hasinger

Our analysis is aimed at characterizing the properties of the integrated spectrum of active galactic nuclei (AGNs) such as the ubiquity of the Fe K{\alpha} emission in AGNs and the dependence of the spectral parameters on the X-ray luminosity and red

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae48acbd5343ec1dc72b838087dd98f2
http://hdl.handle.net/11585/143087

Observations of a z~0.9 cluster of galaxies

Autor: M. P. Ulmer, C. Adami, F. Durret, G. Lima Neto, O. Ilbert, G. Covone, E. Cypriano, W. Mahoney, R. Gavazzi, S. Allam, R. Kron, A. Comastri, L. Angelini, M. Cappi

Publikováno v: X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Conference. AIP Conference Proceedings
X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Conference. AIP Conference Proceedings, 0000, à renseigner, Unknown Region. pp.302-303, ⟨10.1063/1.3475242⟩

International audience; We present a multi-wavelength study on a z~0.9, Cl 1257+4738. The cluster Cl 1257+4738 was found by comparing a ROSAT image with red ground based images, taken to determine if the red galaxies were young dusty ones or old earl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d41008a2e0d3bd15705dc75e34569f58
http://hdl.handle.net/11588/419893

Compton Reflection in AGN with Simbol-X

Autor: V. Beckmann, T. J.-L. Courvoisier, N. Gehrels, P. Lubiński, J. Malzac, P. O. Petrucci, C. R. Shrader, S. Soldi, Jéro^me Rodriguez, Phillippe Ferrando

Publikováno v: AIP Conference Proceedings
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE
SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE, Dec 2008, Paris Cedex 13, France. pp.141-144, ⟨10.1063/1.3149396⟩

AGN exhibit complex hard X-ray spectra. Our current understanding is that the emission is dominated by inverse Compton processes which take place in the corona above the accretion disk, and that absorption and reflection in a distant absorber play a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::743ba5929ccb6b4eac85970306d19811
https://doi.org/10.1063/1.3149396