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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The multiwavelength spectrum of NGC 3115: hot accretion flow properties

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Author(s):
Almeida, Ivan [1] ; Nemmen, Rodrigo [1] ; Wong, Ka-Wah [2, 3] ; Wu, Qingwen [4] ; Irwin, Jimmy A. [5]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, BR-05508090 Sao Paulo, SP - Brazil
[2] Eureka Sci Inc, 2452 Delmer St, Suite 100, Oakland, CA 94602 - USA
[3] Minnesota State Univ, Dept Phys & Astron, Mankato, MN 56001 - USA
[4] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei - Peoples R China
[5] Univ Alabama, Dept Phys & Astron, Box 870324, Tuscaloosa, AL 35487 - USA
Total Affiliations: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 475, n. 4, p. 5398-5402, APR 2018.
Web of Science Citations: 1
Abstract

NGC 3115 is the nearest galaxy hosting a billion solar mass black hole and is also a low-luminosity active galactic nucleus (LLAGN). X-ray observations of this LLAGN are able to spatially resolve the hot gas within the sphere of gravitational influence of the supermassive black hole. These observations make NGC 3115 an important test bed for black hole accretion theory in galactic nuclei since they constrain the outer boundary conditions of the hot accretion flow. We present a compilation of the multiwavelength spectral energy distribution (SED) of the nucleus of NGC 3115 from radio to X-rays. We report the results from modelling the observed SED with radiatively inefficient accretion flow (RIAF) models. The radio emission can be well-explained by synchrotron emission from the RIAF without the need for contribution from a relativistic jet. We obtain a tight constraint on the RIAF density profile, rho(r) proportional to r(-0.73-0.02+0.01), implying that mass-loss through subrelativistic outflows from the RIAF is significant. The lower frequency radio observation requires the synchrotron emission from a non-thermal electron population in the RIAF, similarly to Sgr A{*}. (AU)

FAPESP's process: 15/26831-1 - The spectral energy distribution of the low-luminosity AGN NGC 3115
Grantee:Ivan Carlos de Almeida
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 16/24857-6 - Winds and feedback from supermassive black holes accreting at low rates
Grantee:Ivan Carlos de Almeida
Support type: Scholarships in Brazil - Master