Benvenuti nell'Anagrafe della Ricerca d'Ateneo
La valutazione delle attività di ricerca che si svolgono nelle università ha assunto un'importanza rilevante sia per l'intero sistema universitario sia all'interno di ogni singolo ateneo. Roma Tre si è quindi dotata di idonei strumenti informativi in grado di supportare al meglio le azioni di monitoraggio e di valutazione delle attività di ricerca svolte nei propri dipartimentied ha realizzato una Anagrafe della Ricerca di Ateneo.
EnglishWe report the results of a broadband (0.1-100 keV) X-ray observation of the nearby elliptical galaxy NGC 1052, performed with the BeppoSAX observatory. We confirm the presence of a bright (2-10 keV luminosity similar to4 x 10(42) erg s(-1)) and strongly absorbed (N-H similar to 2 x 10(23) cm(-2)) X-ray source. The flatness of the X-ray spectrum (photon index, Gamma, similar or equal to1.4), the estimated low accretion rate ((m) over dot equivalent to (M) over dot/(M) over dot(Edd) similar to 10(-4)) and the radio-to-X-ray spectral energy distribution suggest that this observation may represent the first direct measurement above 10 keV of an accretion-dominated flow in an elliptical galaxy.
Guainazzi M, Oosterbroek T, Antonelli LA, & Matt G (2000). On the hypothesis of an advection-dominated flow in the core of NGC 1052: new constraints from a BeppoSAX observation. ASTRONOMY & ASTROPHYSICS, 364(2), L80-L84.
| Titolo: | On the hypothesis of an advection-dominated flow in the core of NGC 1052: new constraints from a BeppoSAX observation |
| Autori: | |
| Data di pubblicazione: | 2000 |
| Rivista: | |
| Citazione: | Guainazzi M, Oosterbroek T, Antonelli LA, & Matt G (2000). On the hypothesis of an advection-dominated flow in the core of NGC 1052: new constraints from a BeppoSAX observation. ASTRONOMY & ASTROPHYSICS, 364(2), L80-L84. |
| Abstract: | We report the results of a broadband (0.1-100 keV) X-ray observation of the nearby elliptical galaxy NGC 1052, performed with the BeppoSAX observatory. We confirm the presence of a bright (2-10 keV luminosity similar to4 x 10(42) erg s(-1)) and strongly absorbed (N-H similar to 2 x 10(23) cm(-2)) X-ray source. The flatness of the X-ray spectrum (photon index, Gamma, similar or equal to1.4), the estimated low accretion rate ((m) over dot equivalent to (M) over dot/(M) over dot(Edd) similar to 10(-4)) and the radio-to-X-ray spectral energy distribution suggest that this observation may represent the first direct measurement above 10 keV of an accretion-dominated flow in an elliptical galaxy. |
| Handle: | http://hdl.handle.net/11590/132464 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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