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Investigating the Covering Fraction Distribution of Swift/BAT AGNs with X-Ray and Infrared Observations
Indexado
WoS WOS:000454653300005
Scopus SCOPUS_ID:85059842421
DOI 10.3847/1538-4357/AAEE6C
Año 2019
Tipo artículo de investigación

Citas Totales

Autores Afiliación Chile

Instituciones Chile

% Participación
Internacional

Autores
Afiliación Extranjera

Instituciones
Extranjeras


Abstract



We present an analysis of a sample of 69 local obscured Swift/Burst Alert Telescope active galactic nuclei (AGNs) with X-ray spectra from NuSTAR and infrared (IR) spectral energy distributions from Herschel and WISE. We combine this X-ray and IR phenomenological modeling and find a significant correlation between reflected hard X-ray emission and IR AGN emission, with suggestive indications that this correlation may be stronger than the one between intrinsic hard X-ray and IR emissions. This relation between the IR and reflected X-ray emission suggests that both are the result of the processing of intrinsic emission from the corona and accretion disk by the same structure. We explore the resulting implications on the underlying distribution of covering fraction for all AGNs, by generating mock observables for the reflection parameter and IR luminosity ratio using empirical relations found for the covering fraction with each quantity. We find that the observed distributions of the reflection parameter and IR-to-X-ray ratio are reproduced with broad distributions centered around covering fractions of at least similar to 40%-50%, whereas narrower distributions match our observations only when centered around covering fractions of similar to 70%-80%. Our results are consistent with both independent estimates of the covering fractions of individual objects and the typical covering fraction obtained on the basis of obscured fractions for samples of AGNs. These results suggest that the level of reprocessing in AGNs, including X-ray reflection, is related in a relatively straightforward way to the geometry of the obscuring material.

Revista



Revista ISSN
Astrophysical Journal 0004-637X

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Disciplinas de Investigación



WOS
Astronomy & Astrophysics
Scopus
Sin Disciplinas
SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 Lanz, L. Mujer Dartmouth Coll - Estados Unidos
Dartmouth College - Estados Unidos
2 Hickox, R. Hombre Dartmouth Coll - Estados Unidos
Dartmouth College - Estados Unidos
3 Balokovic, Mislav - Harvard Smithsonian Ctr Astrophys - Estados Unidos
4 Shimizu, Taro Hombre Max Planck Inst Extraterr Phys - Alemania
Max Planck Institute for Extraterrestrial Physics - Alemania
5 Ricci, C. Hombre Unversidad Diego Potales - Chile
Peking Univ - China
CASSACA - Chile
Nucleo de Astronomia de la Falcultad de Ingenieria - Chile
Peking University - China
Chinese Academy of Sciences South America Center for Astronomy - Chile
Núcleo di Astronomía de la Facultad dei Ingeniería - Chile
6 Goulding, Andy D. Hombre Princeton Univ - Estados Unidos
Princeton University - Estados Unidos
7 Ballantyne, David R. Hombre Georgia Inst Technol - Estados Unidos
Georgia Institute of Technology - Estados Unidos
8 BAUER, FRANZ ERIK Hombre Unversidad Diego Potales - Chile
Instituto Milenio de Astrofísica - Chile
Space Sci Inst - Estados Unidos
Nucleo de Astronomia de la Falcultad de Ingenieria - Chile
Space Science Institute - Estados Unidos
Núcleo di Astronomía de la Facultad dei Ingeniería - Chile
9 Chen, Chien-Ting Hombre PENN STATE UNIV - Estados Unidos
Pennsylvania State University - Estados Unidos
10 Del Moro, Agnese Mujer Max Planck Inst Extraterr Phys - Alemania
Max Planck Institute for Extraterrestrial Physics - Alemania
10 Moro, Agnese Del Mujer Max Planck Institute for Extraterrestrial Physics - Alemania
Max Planck Inst Extraterr Phys - Alemania
11 Rigopoulou, Dimitra Mujer Virginia Tech - Estados Unidos
Virginia Polytechnic Institute and State University - Estados Unidos
12 Michael, J. Koss - Eureka Sci Inc - Estados Unidos
Eureka Scientific, Inc. - Estados Unidos
12 Koss, Michael J. Hombre Eureka Scientific, Inc. - Estados Unidos
13 LaMassa, Stephanie Mujer Space Telescope Sci Inst - Estados Unidos
STScI - Estados Unidos
Space Telescope Science Institute - Estados Unidos
14 Masini, A. Hombre Dartmouth Coll - Estados Unidos
Istituto Nazionale di Astrofisica - Italia
UNIV BOLOGNA - Italia
Dartmouth College - Estados Unidos
Osservatorio Astronomico Di Bologna - Italia
Alma Mater Studiorum Università di Bologna - Italia
Osservatorio Astronomico di Roma - Italia
15 Zappacosta, Luca Hombre Istituto Nazionale di Astrofisica - Italia
Osservatorio Astronomico di Roma - Italia

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Financiamiento



Fuente
FONDECYT
CONICYT-Chile
National Science Foundation
Fondo Nacional de Desarrollo Científico y Tecnológico
Comisión Nacional de Investigación Científica y Tecnológica
Ministerio de Economía, Fomento y Turismo, Chile
NASA
National Aeronautics and Space Administration
John Templeton Foundation
Basal-CATA
Ministry of Economy, Development, and Tourism's Millennium Science Initiative
Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica
ASI/INAF
NASA Headquarters under the NASA Earth and Space Science Fellowship Program
NASA through ADAP award
Istituto Nazionale di Astrofisica
Ministry of Economy, Development, and Tourism
CONICYT+PAI
China-CONICYT fund
CONICYT+PAI (Convocatoria Nacional subvencion a instalacion en la academia convocatoria ano)
CONICYT-Chile (Basal-CATA)
CONICYT-Chile (FONDECYT Regular)
black hole Initiative - John Templeton Foundation
National Science Foundation through CAREER
American Sheep Industry Association

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos



Agradecimiento
We thank the referee for useful comments, which particularly strengthened the statistical analysis. L.L. and R.C.H. acknowledge support from NASA through grant No. NNX15AP24G. L.L. acknowledges support from NASA through grant No. NNX17AB58G. R.C.H acknowledges support from the National Science Foundation through CAREER grant No. 1554584. M.B. acknowledges support from NASA Headquarters under the NASA Earth and Space Science Fellowship Program, grant No. NNX14AQ07H, and support from the black hole Initiative, which is funded by a grant from the John Templeton Foundation. C.R. acknowledges the CONICYT+PAI (Convocatoria Nacional subvencion a instalacion en la academia convocatoria ano 2017 PAI77170080) and financial support from FONDECYT 1141218, Basal-CATA PFB-06/2007, and the China-CONICYT fund. F.E.B. acknowledges support from CONICYT-Chile (Basal-CATA PFB-06/2007, FONDECYT Regular 1141218), the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant No. IC120009, awarded to The Millennium Institute of Astrophysics, MAS. M.K. acknowledges support from NASA through ADAP award No. NNH16CT03C. A.M. acknowledges support from the ASI/INAF through grant No. I/037/12/0-011/13. L.Z. acknowledges financial support under ASI/INAF contract No. I/037/12/0. This work made use of ASURV Rev. 1.2 (Lavalley et al. 1992), which implements the methods presented in Isobe et al. (1986).
We thank the referee for useful comments, which particularly strengthened the statistical analysis. L.L. and R.C.H. acknowledge support from NASA through grant No. NNX15AP24G. L.L. acknowledges support from NASA through grant No. NNX17AB58G. R.C.H acknowledges support from the National Science Foundation through CAREER grant No. 1554584. M.B. acknowledges support from NASA Headquarters under the NASA Earth and Space Science Fellowship Program, grant No. NNX14AQ07H, and support from the black hole Initiative, which is funded by a grant from the John Templeton Foundation. C.R. acknowledges the CONICYT+PAI (Convocatoria Nacional subvencion a instalacion en la academia convocatoria año 2017 PAI77170080) and financial support from FONDECYT 1141218, Basal-CATA PFB-06/2007, and the China-CONICYT fund. F.E.B. acknowledges support from CONICYT-Chile (Basal-CATA PFB-06/2007, FONDECYT Regular 1141218), the Ministry of Economy, Development, and Tourism’s Millennium Science Initiative through grant No. IC120009, awarded to The Millennium Institute of Astrophysics, MAS. M.K. acknowledges support from NASA through ADAP award No. NNH16CT03C. A.M. acknowledges support from the ASI/INAF through grant No. I/037/12/0-011/13. L.Z. acknowledges financial support under ASI/INAF contract No. I/037/12/0. This work made use of ASURV Rev. 1.2 (Lavalley et al. 1992), which implements the methods presented in Isobe et al. (1986). Facilities: Herschel, NuSTAR, Swift, WISE.

Muestra la fuente de financiamiento declarada en la publicación.