Mapping the circumnuclear matter of NGC 1068 in X-rays

被引：15

作者：

Guainazzi, M

Molendi, S

Vignati, P

Matt, G

Iwasawa, K

机构：

[1] ESTEC SA, ESA, Dept Space Sci, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

[2] CNR, Ist Fis cosm G Occhialini, I-20133 Milan, Italy

[3] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy

[4] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

NEW ASTRONOMY | 2000年 / 5卷 / 04期

关键词：

galaxies : Seyfert; galaxies : individual : NGC 1068; x-rays : general;

D O I：

10.1016/S1384-1076(00)00027-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An energy-dependent variation of the X-ray emission from the archetypical "Compton-thick" Seyfert 2 galaxy NGC 1068 has been observed between two BeppoSAX observations, performed one year apart. This variation is highest in the 3-10 keV band and declines towards lower and higher energies. The most straightforward explanation is a flattening of the primary nuclear continuum, which is scattered along our line of sight by an electron plasma. If this is indeed the case, this evidence allows us to obtain the first direct estimate of the location of the scattering medium, at similar to 1 pc from the nucleus. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：235 / 241

页数：7

共 27 条

[1] UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].

ANTONUCCI, R .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 :473-521

[2] SPECTROPOLARIMETRY AND THE NATURE OF NGC-1068 [J].

ANTONUCCI, RRJ ;

MILLER, JS .

ASTROPHYSICAL JOURNAL, 1985, 297 (02) :621-632

[3] Jet-driven motions in the narrow-line region of NGC 1068 [J].

Axon, DJ ;

Marconi, A ;

Capetti, A ;

Macchetto, FD ;

Schreier, E ;

Robinson, A .

ASTROPHYSICAL JOURNAL, 1998, 496 (02) :L75-+

[4] The medium-energy concentrator spectrometer on board the BeppoSAX X-ray astronomy satellite [J].

Boella, G ;

Chiappetti, L ;

Conti, G ;

Cusumano, G ;

DelSordo, S ;

LaRosa, G ;

Maccarone, MC ;

Mineo, T ;

Molendi, S ;

Re, S ;

Sacco, B ;

Tripiciano, M .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :327-340

[5] BeppoSAX, the wide band mission for X-ray astronomy [J].

Boella, G ;

Butler, RC ;

Perola, GC ;

Piro, L ;

Scarsi, L ;

Bleeker, JAM .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :299-307

[6] Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. XII. Ground-based monitoring of 3C 390.3 [J].

Dietrich, M ;

Peterson, BM ;

Albrecht, P ;

Altmann, M ;

Barth, AJ ;

Bennie, PJ ;

Bertram, R ;

Bochkarev, NG ;

Bock, H ;

Braun, JM ;

Burenkov, A ;

Collier, S ;

Fang, LZ ;

Francis, OP ;

Filippenko, AV ;

Foltz, CB ;

Gassler, W ;

Gaskell, CM ;

Geffert, M ;

Ghosh, KK ;

Hilditch, RW ;

Honeycutt, RK ;

Horne, K ;

Huchra, JP ;

Kaspi, S ;

Kummel, M ;

Leighly, KM ;

Leonard, DC ;

Malkov, YF ;

Mikhailov, V ;

Miller, HR ;

Morrill, AC ;

Noble, J ;

O'Brien, PT ;

Oswalt, TD ;

Pebley, SP ;

Pfeiffer, M ;

Pronik, VI ;

Qian, BC ;

Robertson, JW ;

Robinson, A ;

Rumstay, KS ;

Schmoll, J ;

Sergeev, SG ;

Sergeeva, EA ;

Shapovalova, AI ;

Skillman, DR ;

Snedden, SA ;

Soundararajaperumal, S ;

Stirpe, GM .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1998, 115 (02) :185-202

[7] The high energy instrument PDS on-board the BeppoSAX X-ray astronomy satellite [J].

Frontera, F ;

Costa, E ;

DalFiume, D ;

Feroci, M ;

Nicastro, L ;

Orlandini, M ;

Palazzi, E ;

Zavattini, G .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :357-369

[8] A direct image of the obscuring disk surrounding an active galactic nucleus [J].

Gallimore, JF ;

Baum, SA ;

ODea, CP .

NATURE, 1997, 388 (6645) :852-854

[9] X-RAY REFLECTION FROM COLD MATTER IN ACTIVE GALACTIC NUCLEI AND X-RAY BINARIES [J].

GEORGE, IM ;

FABIAN, AC .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 249 (02) :352-367

[10] Extremely rapid variations of water maser emission from the Circinus galaxy [J].

Greenhill, LJ ;

Ellingsen, SP ;

Norris, RP ;

Gough, RG ;

Sinclair, MW ;

Moran, JM ;

Mushotzky, R .

ASTROPHYSICAL JOURNAL, 1997, 474 (02) :L103-L106

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