DENSE CLOUDS NEAR THE CENTRAL ENGINE OF ACTIVE GALACTIC NUCLEI

被引：37

作者：

SIVRON, R

TSURUTA, S

机构：

[1] Physics Department, Montana State University, Bozeman

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 402卷 / 02期

关键词：

DENSE MATTER; GALAXIES; ACTIVE; NUCLEI; SEYFERT; QUASARS; GENERAL;

D O I：

10.1086/172146

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A model is presented which assumes the existence of cold dense clouds near the central engine of active galactic nuclei (AGNs). The effects of such clouds on the observed spectrum are explored. It is shown that this model is consistent with the complicated observed spectra and variability behavior of most extensively studied Seyfert nuclei. The results are compared with other proposed models. The existing observational evidence appears to support the ''cloud-model.''

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页码：420 / 424

页数：5

相关论文

共 18 条

[1]

ABRAMOWICZ MA, 1990, STRUCTURE PROPERTIES, P299

[2] THE LYMAN EDGE TEST OF THE QUASAR EMISSION MECHANISM [J].

ANTONUCCI, RRJ ;

KINNEY, AL ;

FORD, HC .

ASTROPHYSICAL JOURNAL, 1989, 342 (01) :64-82

[3] DENSE THIN CLOUDS IN THE CENTRAL REGIONS OF ACTIVE GALACTIC NUCLEI [J].

CELOTTI, A ;

FABIAN, AC ;

REES, MJ .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1992, 255 (03) :419-422

[4]

DONE C, 1990, MON NOT R ASTRON SOC, V243, P713

[5]

DONE C, 1991, PREPRINT

[6] PAIR-INDUCED SPECTRAL CHANGES AND VARIABILITY IN COMPACT X-RAY SOURCES [J].

FABIAN, AC ;

BLANDFORD, RD ;

GUILBERT, PW ;

PHINNEY, ES ;

CUELLAR, L .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1986, 221 (04) :931-945

[7] RADIATIVE EQUILIBRIUM OF HIGH-DENSITY CLOUDS WITH APPLICATION TO ACTIVE GALACTIC NUCLEUS CONTINUA [J].

FERLAND, GJ ;

REES, MJ .

ASTROPHYSICAL JOURNAL, 1988, 332 (01) :141-156

[8] 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

[9] COLD MATERIAL IN NON-THERMAL SOURCES [J].

GUILBERT, PW ;

REES, MJ .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 233 (02) :475-484

[10] RAPID VARIABILITY OF THE IRON FLUORESCENCE LINE FROM THE SEYFERT-1 GALAXY NGC6814 [J].

KUNIEDA, H ;

TURNER, TJ ;

AWAKI, H ;

KOYAMA, K ;

MUSHOTZKY, R ;

TSUSAKA, Y .

NATURE, 1990, 345 (6278) :786-788