Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Giovanni La Mura"'
Autor:
Benedetta Dalla Barba, Marco Berton, Luigi Foschini, Giovanni La Mura, Amelia Vietri, Stefano Ciroi
Publikováno v:
Physics, Vol 5, Iss 4, Pp 1061-1080 (2023)
We present first results of the analysis of optical spectra of two complementary samples of Seyfert galaxies (Seyferts). The first sample was extracted from a selection of the 4th Fermi Gamma-ray Large Area Telescope (4FGL) catalog and consists of 11
Externí odkaz:
https://doaj.org/article/70f881a4448c4ed5bcb247a95f4caf14
Autor:
Sina Chen, Preeti Kharb, Silpa Sasikumar, Sumana Nandi, Marco Berton, Emilia Järvelä, Ari Laor, Ehud Behar, Luigi Foschini, Amelia Vietri, Minfeng Gu, Giovanni La Mura, Luca Crepaldi, Minhua Zhou
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 32 (2024)
We present new 1.5–8.5 GHz Very Long Baseline Array (VLBA) observations and 0.32–1.26 GHz Giant Meterwave Radio Telescope (GMRT) observations of J0354−1340, which is the only known radio-quiet (RQ) or radio-intermediate (RI) narrow-line Seyfert
Externí odkaz:
https://doaj.org/article/8f84c7ce88df40579ac8829bbb60bcb7
Autor:
Giovanni La Mura, Ulisses Barres de Almeida, Ruben Conceição, Alessandro De Angelis, Francesco Longo, Mário Pimenta, Bernardo Tomé, Davide Miceli
Publikováno v:
Galaxies, Vol 9, Iss 4, p 98 (2021)
Recent observations have confirmed that Gamma-Ray Burst (GRB) afterglows produce Very High-Energy radiation (VHE, E>100GeV). This highly anticipated discovery opens new scenarios in the interpretation of GRBs and in their role as probes of Extragalac
Externí odkaz:
https://doaj.org/article/d447065b3a414ebbb60c78cb583ae835
Autor:
Enrico Congiu, Marcella Contini, Stefano Ciroi, Valentina Cracco, Francesco Di Mille, Marco Berton, Michele Frezzato, Giovanni La Mura, Piero Rafanelli
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2017)
We present our recent results about the extended narrow-line region (ENLR) of two nearby Seyfert 2 galaxies (IC 5063 and NGC 7212) obtained by modeling the observed line profiles and spectra with composite models (photoionization+shocks) in the diffe
Externí odkaz:
https://doaj.org/article/d936cc691e5d4cfe8349ef285bda72df
Autor:
Giovanni La Mura, Marco Berton, Sina Chen, Stefano Ciroi, Enrico Congiu, Valentina Cracco, Michele Frezzato, Piero Rafanelli
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2017)
Active Galactic Nuclei (AGNs) are characterized by emission of radiation over more than 10 orders of magnitude in frequency. Therefore, the execution of extensive surveys of the sky, with different types of detectors, is providing the attractive poss
Externí odkaz:
https://doaj.org/article/5772d05210e54a83845f250b1376e0ce
Autor:
Dragana Ilić, Alla I. Shapovalova, Luka Č. Popović, Vahram Chavushyan, Alexander N. Burenkov, Wolfram Kollatschny, Andjelka Kovačević, Sladjana Marčeta-Mandić, Nemanja Rakić, Giovanni La Mura, Piero Rafanelli
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2017)
We present the results of the long-term optical monitoring campaign of active galactic nuclei (AGN) coordinated by the Special Astrophysical Observatory of the Russian Academy of Science. This campaign has produced a remarkable set of optical spectra
Externí odkaz:
https://doaj.org/article/5ab2e178bdd648b58c9de6d5cd4c459e
Autor:
Marco Berton, Luigi Foschini, Alessandro Caccianiga, Stefano Ciroi, Enrico Congiu, Valentina Cracco, Michele Frezzato, Giovanni La Mura, Piero Rafanelli
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 4 (2017)
In recent years, the old paradigm according to which only high-mass black holes can launch powerful relativistic jets in active galactic nuclei (AGN) has begun to crumble. The discovery of γ-rays coming from narrow-line Seyfert 1 galaxies (NLS1s), u
Externí odkaz:
https://doaj.org/article/655d4864c5234f2bbbb704dc7a01e782
Autor:
Giovanni La Mura, Marco Berton, Sina Chen, Abhishek Chougule, Stefano Ciroi, Enrico Congiu, Valentina Cracco, Michele Frezzato, Sabrina Mordini, Piero Rafanelli
Publikováno v:
Atoms, Vol 5, Iss 4, p 43 (2017)
The spectra of active galactic nuclei (AGNs) are often characterized by a wealth of emission lines with different profiles and intensity ratios that lead to a complicated classification. Their electromagnetic radiation spans more than 10 orders of ma
Externí odkaz:
https://doaj.org/article/61b791c751804792a43c2c8eaa17f870
Publikováno v:
EPJ Web of Conferences. 280:01007
The Southern Wide-field Gamma-ray Observatory (SWGO) is the proposal for a new ground-based γ-ray instrument in the Southern Hemisphere, which will use an array of water-Cherenkov particle detectors to provide continuous monitoring of a large portio
Autor:
Francesco Longo, B. Tome, Giovanni La Mura, Alessandro De Angelis, Mário Pimenta, Davide Miceli, Ulisses Barres de Almeida, R. Conceição
Publikováno v:
Galaxies
Volume 9
Issue 4
Galaxies, 2021, 9 (4), pp.98. ⟨10.3390/galaxies9040098⟩
Galaxies, Vol 9, Iss 98, p 98 (2021)
Volume 9
Issue 4
Galaxies, 2021, 9 (4), pp.98. ⟨10.3390/galaxies9040098⟩
Galaxies, Vol 9, Iss 98, p 98 (2021)
Recent observations have confirmed that Gamma-Ray Burst (GRB) afterglows produce Very High-Energy radiation (VHE, E>
100GeV). This highly anticipated discovery opens new scenarios in the interpretation of GRBs and in their role as probes of Ex
100GeV). This highly anticipated discovery opens new scenarios in the interpretation of GRBs and in their role as probes of Ex