A COMPARISON OF C-IV AND H-BETA BROAD EMISSION-LINE PROFILES IN LOW-REDSHIFT ACTIVE GALACTIC NUCLEI

被引：19

作者：

CORBIN, MR

机构：

[1] Department of Astronomy, Ohio State University, Columbus, OH 43210

来源：

ASTROPHYSICAL JOURNAL | 1991年 / 371卷 / 02期

关键词：

GALAXIES; NUCLEI; LINE PROFILES; QUASARS;

D O I：

10.1086/186000

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently published IUE spectra of low-redshift QSOs and Seyfert 1 galaxies have permitted a comparison of the profiles of the C IV lambda-1549 and H-beta broad emission lines. A linear correlation between the FWHM values of the profiles has been found in a sample of 19 objects and is verified to not be the result of separate correlations between these parameters and luminosity. Interpreted in terms of the geometry of the broad-line region, this result is contrary to models which predict low-ionization line emission from an optically thick, geometrically thin accretion disk surrounding the central object. Current evidence favors a model in which broad-line emission arises predominantly in a stratified ensemble of clouds moving radially relative to the central continuum source.

引用

收藏

页码：L51 / L54

页数：4

相关论文

共 46 条

[31] SPECTROPHOTOMETRIC MONITORING OF HIGH LUMINOSITY ACTIVE GALACTIC NUCLEI .2. 1ST RESULTS [J].

PEREZ, E ;

PENSTON, MV ;

MOLES, M .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1989, 239 (01) :75-90

[32] ULTRAVIOLET AND OPTICAL SPECTROSCOPY OF NGC 5548 AND THE NATURE OF THE BROAD-LINE REGION [J].

PETERSON, BM ;

REICHERT, GA ;

KORISTA, KT ;

WAGNER, RM .

ASTROPHYSICAL JOURNAL, 1990, 352 (01) :68-80

[33] STEPS TOWARD DETERMINATION OF THE SIZE AND STRUCTURE OF THE BROAD-LINE REGION IN ACTIVE GALACTIC NUCLEI .2. AN INTENSIVE STUDY OF NGC-5548 AT OPTICAL WAVELENGTHS [J].

PETERSON, BM ;

BALONEK, TJ ;

BARKER, ES ;

BECHTOLD, J ;

BERTRAM, R ;

BOCHKAREV, NG ;

BOLTE, MJ ;

BOND, D ;

BOROSON, TA ;

CARINI, MT ;

CARONE, TE ;

CHRISTENSEN, JA ;

CLEMENTS, SD ;

COCHRAN, AL ;

COHEN, RD ;

CRAMPTON, D ;

DIETRICH, M ;

ELVIS, M ;

FERGUSON, A ;

FILIPPENKO, AV ;

FRICKE, KJ ;

GASKELL, CM ;

HALPERN, JP ;

HUCHRA, JP ;

HUTCHINGS, JB ;

KOLLATSCHNY, W ;

KORATKAR, AP ;

KORISTA, KT ;

KROLIK, JH ;

LAME, NJ ;

LAOR, A ;

LEACOCK, RJ ;

MACALPINE, GM ;

MALKAN, MA ;

MAOZ, D ;

MILLER, HR ;

MORRIS, SL ;

NETZER, H ;

OLIVEIRA, CLM ;

PENFOLD, J ;

PENSTON, MV ;

PEREZ, E ;

POGGE, RW ;

RICHMOND, MW ;

ROMANISHIN, W ;

ROSENBLATT, EI ;

SADDLEMYER, L ;

SADUN, A ;

SAWYER, SR ;

SHIELDS, JC .

ASTROPHYSICAL JOURNAL, 1991, 368 (01) :119-137

[34] EMISSION-LINE VARIABILITY IN SEYFERT-GALAXIES [J].

PETERSON, BM .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1988, 100 (623) :18-36

[35] OBSERVATIONS OF OPTICAL FE-II EMISSION IN THE SPECTRA OF RADIO-QUIET QUASI-STELLAR OBJECTS [J].

PETERSON, BM ;

FOLTZ, CB ;

BYARD, PL .

ASTROPHYSICAL JOURNAL, 1981, 251 (01) :4-7

[36] SOFT-X-RAY ACTIVE GALACTIC NUCLEI [J].

PRAVDO, SH ;

MARSHALL, FE .

ASTROPHYSICAL JOURNAL, 1984, 281 (02) :570-578

[37]

ROBINSON A, 1990, MON NOT R ASTRON SOC, V246, P349

[38] EMISSION-LINE PROFILES IN LOW-REDSHIFT QSOS [J].

SHUDER, JM .

ASTROPHYSICAL JOURNAL, 1984, 280 (02) :491-498

[39]

STRIPE GM, 1989, THESIS LEIDEN U

[40] TOWARD A CLASSIFICATION SCHEME FOR BROAD-LINE PROFILES IN ACTIVE GALACTIC NUCLEI [J].

SULENTIC, JW .

ASTROPHYSICAL JOURNAL, 1989, 343 (01) :54-65

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