| Full text | |
| Author(s): |
de Menezes, Raniere
[1, 2]
;
Nemmen, Rodrigo
[1]
;
Finke, Justin D.
[3]
;
Almeida, Ivan
[1]
;
Rani, Bindu
[4, 5, 6, 7]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Geofis & Ciencias Atmosfer, Inst Astron, Dept Astron, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Troino - Italy
[3] US Naval Res Lab, Code 7653, 4555 Overlook Ave SW, Washington, DC 20375 - USA
[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 - USA
[5] Korea Astron & Space Sci Inst, Daejeon 34055 - South Korea
[6] Southeastent Univ Res Assoc, Washington, DC 20005 - USA
[7] NASA, GSFC, Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 - USA
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 492, n. 3, p. 4120-4130, MAR 2020. |
| Web of Science Citations: | 4 |
| Abstract | |
The majority of the activity around nearby (z approximate to 0) supermassive black holes is found in low-luminosity active galactic nuclei (LLAGN), the most of them being classified as low ionization nuclear emission regions. Although these sources are well studied from radio up to X-rays, they are poorly understood in gamma-rays. In this work, we take advantage of the all sky-surveying capabilities of the Large Area Telescope on board Fermi Gamma-ray Space Telescope to study the whole Palomar sample of LLAGN in gamma-rays. Precisely, the four radio brightest LLAGN in the sample are identified as significant gamma-ray emitters, all of which are recognized as powerful Fanaroff-Riley 1 galaxies. These results suggest that the presence of powerful radio jets is of substantial importance for observing a significant gamma-ray counterpart even if these jets are misaligned with respect to the line of sight. We also find that most of the X-ray-brightest LLAGN do not have a significant gamma-ray and strong radio emission, suggesting that the X-rays come mainly from the accretion flow in these cases. A detailed analysis of the spectral energy distributions (SEDs) of NGC 315 and NGC 4261, both detected in gamma-rays, is provided where we make a detailed comparison between the predicted hadronic gamma-ray emission from a radiatively inefficient accretion flow (RIAF) and the gamma-ray emission from a leptonic jet-dominated synchrotron self-Compton (SSC) model. Both SEDs are better described by the SSC model, while the RIAF fails to explain the gamma-ray observations. (AU) | |
| FAPESP's process: | 19/10054-7 - Black hole winds and feedback |
| Grantee: | Ivan Carlos de Almeida |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 17/01461-2 - The extreme universe: black holes and the Fermi telescope |
| Grantee: | Rodrigo Nemmen da Silva |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 16/24857-6 - Winds and feedback from supermassive black holes accreting at low rates |
| Grantee: | Ivan Carlos de Almeida |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 18/24801-6 - Multislit spectroscopy of unidentified gamma-ray sources |
| Grantee: | Raniere Maciel de Menezes |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |