The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566

Details The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566 The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...131...87c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 131, no. 1, Feb. 1984, p. 87-102.

Astronomy and Astrophysics

Astronomy

34

Astronomical Spectroscopy, Interstellar Gas, Seyfert Galaxies, Ultraviolet Astronomy, Ultraviolet Spectra, Continuous Spectra, Emission Spectra, Interstellar Extinction, Photoionization, Spectral Energy Distribution

Scientific paper

The 5 Seyfert I galaxies MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566 have been observed with IUE (1200 - 3200 Å). Their UV spectrum is rich in emission lines. A steep rise of the continuum toward shorter wavelengths is observed below ≡2000 Å in 4 of these objects; this excess is interpreted as thermal emission from an accretion disk. For a sample of 23 Seyfert galaxies, a significant inverse correlation is found between the strength of the Fe II optical lines - relative to that of Hβ - vs. the C IV 1550/C III] 1908 intensity ratio. The intensities of the emission lines correlate with that of the continuum, supporting thus photoionization models of the broad line region (BLR). The authors postulate that most of the missing emission arises through collisional excitation in a high density/opacity zone of the BLR. Collisional model calculations are carried out that include the hydrogen, Fe II, Mg II, C II 1335, and C II] 2325 lines.

Affiliated with

Also associated with

No associations

Rating

The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1857069