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Record Details

Record 1 of 6787
The Multi-Layer Variable Absorbers in NGC 1365 Revealed by XMM-Newton and NuSTAR
External Online Source: doi:10.1088/0004-637X/804/2/107
Author and Affiliation:
Rivers, E.(California Inst. of Tech., Cahill Center for Astronomy and Astrophysics, Pasadena, CA, United States)
Risaliti, G.(Osservatorio Astrofisico Arcetri, Florence, Italy)
Walton, D. J.(Jet Propulsion Lab., California Inst. of Tech., Pasadena, CA, United States)
Harrison, F.(California Inst. of Tech., Cahill Center for Astronomy and Astrophysics, Pasadena, CA, United States)
Arevalo, P.(Universidad Catolica de Valparaiso, Inst. de Física y Astronomía, Facultad de Ciencias, Valparaiso, Chile)
Baur, F. E.(Pontificia Univ. Catolica de Chile, Inst. de Astrofísica, Santiago, Chile)
Boggs, S. E.(California Univ., Space Sciences Lab., Berkeley, CA, United States)
Brenneman, L. W.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Brightman, M.(California Inst. of Tech., Cahill Center for Astronomy and Astrophysics, Pasadena, CA, United States)
Zhang, W. W.(NASA Goddard Space Flight Center, Greenbelt, MD United States) Show more authors
Abstract: Between 2012 July and 2013 February, NuSTAR and XMM-Newton performed four long-look joint observations of the type 1.8 Seyfert, NGC 1365. We have analyzed the variable absorption seen in these observations in order to characterize the geometry of the absorbing material. Two of the observations caught NGC 1365 in an unusually low absorption state, revealing complexity in the multi-layer absorber that had previously been hidden. We find the need for three distinct zones of neutral absorption in addition to the two zones of ionized absorption and the Compton-thick torus previously seen in this source. The most prominent absorber is likely associated with broad-line region clouds with column densities of around approximately 10 (sup 23) per square centimeter and a highly clumpy nature as evidenced by an occultation event in 2013 February. We also find evidence of a patchy absorber with a variable column around approximately 10 (sup 22) per square centimeter and a line-of-sight covering fraction of 0.3-0.9, which responds directly to the intrinsic source flux, possibly due to a wind geometry. A full-covering, constant absorber with a low column density of approximately 1 by 10 (sup 22) per square centimeter is also present, though the location of this low density haze is unknown.
Publication Date: May 07, 2015
Document ID:
20160010534
(Acquired Aug 24, 2016)
Subject Category: ASTROPHYSICS; ASTRONOMY
Report/Patent Number: GSFC-E-DAA-TN35013
Document Type: Journal Article
Publication Information: The Astrophysical Journal (e-ISSN 2041-8213); Volume 804; Issue No. 2, No. 107; 1-11
Publisher Information: The American Astronomical Society
Contract/Grant/Task Num: NNG08FD60C
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: X RAY ABSORPTION; ABSORPTION SPECTROSCOPY; ENERGY ABSORPTION; PLASMAS (PHYSICS); NEBULAE; REFLECTION; SPECTRUM ANALYSIS; ACTIVE GALACTIC NUCLEI; SEYFERT GALAXIES; OCCULTATION; STELLAR WINDS; BLACK HOLES (ASTRONOMY); X RAY SPECTROSCOPY; XMM-NEWTON TELESCOPE; SPECTROSCOPIC TELESCOPES; X RAY ASTRONOMY
Other Descriptors: GALAXIES: ACTIVE AEURO" GALAXIES: INDIVIDUAL (NGC 1365) AEURO" X-RAYS: GALAXIES
Availability Source: Other Sources
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