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The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study
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SYSNO ASEP 0471848 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The nature of the torus in the heavily obscured AGN Markarian 3: an X-ray study Tvůrce(i) Guainazzi, M. (IT)
Risaliti, G. (IT)
Awaki, H. (JP)
Arévalo, J. R. (ES)
Bauer, F. E. (CL)
Bianchi, S. (IT)
Boggs, J. (US)
Brandt, W.N. (US)
Brightman, M. (US)
Christensen, F. E. (DK)
Craig, W. W. (US)
Forster, K. (US)
Hailey, C. J. (US)
Harrison, F. (US)
Koss, K. (CZ)
Longinotti, A. L. (ES)
Markwardt, C. (US)
Marinucci, M. (IT)
Matt, G. (IT)
Reynolds, C. S. (US)
Ricci, C. (CL)
Stern, D. (US)
Svoboda, Jiří (ASU-R) RID, ORCID
Walton, D. J. (US)
Zhang, W. (US)Zdroj.dok. Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
Roč. 460, č. 2 (2016), s. 1954-1969Poč.str. 17 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova active galaxies ; X-rays ; Markarian 3 Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Institucionální podpora ASU-R - RVO:67985815 UT WOS 000379832800064 EID SCOPUS 84983059545 DOI 10.1093/mnras/stw1033 Anotace In this paper, we report the results of an X-ray monitoring campaign on the heavily obscured Seyfert galaxy, Markarian 3, carried out between the fall of 2014 and the spring of 2015 with NuSTAR, Suzaku and XMM-Newton. The hard X-ray spectrum of Markarian 3 is variable on all the time-scales probed by our campaign, down to a few days. The observed continuum variability is due to an intrinsically variable primary continuum seen in transmission through a large, but still Compton-thin column density (N-H similar to 0.8-1.1 x 10(24) cm(-2)). If arranged in a spherical-toroidal geometry, the Compton scattering matter has an opening angle a parts per thousand integral 66A degrees, and is seen at a grazing angle through its upper rim (inclination angle a parts per thousand integral 70A degrees). We report a possible occultation event during the 2014 campaign. If the torus is constituted by a system of clouds sharing the same column density, this event allows us to constrain their number (17 +/- 5) and individual column density, [a parts per thousand integral (4.9 +/- 1.5) x 10(22) cm(-2)]. The comparison of IR and X-ray spectroscopic results with state-of-the art 'torus' models suggests that at least two-thirds of the X-ray obscuring gas volume might be located within the dust sublimation radius. We report also the discovery of an ionized absorber, characterized by variable resonant absorption lines due to He- and H-like iron. This discovery lends support to the idea that moderate column density absorbers could be due to clouds evaporated at the outer surface of the torus, possibly accelerated by the radiation pressure due to the central AGN emission leaking through the patchy absorber. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2017
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