The broad and narrow lines in the spectrum of the quasar 3C 351

Abstract

view Abstract Citations (21) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The broad and narrow lines in the spectrum of the quasar 3C 351. Netzer, H. ; Wills, B. J. ; Wills, D. Abstract 3C 351 is the only quasar so far in which the broad and narrow components of Ly-alpha and H-beta can be easily separated. The combination of Ly-alpha from previous IUE data and our new optical observations suggests that Ly-alpha/H-beta is equal to about 12 in both components. By comparing this line ratio with the results of a photoionization calculation for the narrow-line region, a line-of-sight reddening E (B-V) value of approximately 0.25, most of which is probably intrinsic, is found. Applying this reddening to the observed broad emission lines gives an intrinsic intensity ratio Ly-alpha/H-beta of about 52, indicating that collisional enhancement of H-beta may not be important. The intrinsic intensity ratio H-alpha/H-beta of about 14 is like that observed in some broad-line radio galaxies, suggesting that some quasars may be very luminous members of that class. Publication: The Astrophysical Journal Pub Date: March 1982 DOI: 10.1086/159757 Bibcode: 1982ApJ...254..489N Keywords: Astronomical Spectroscopy; H Beta Line; Lyman Alpha Radiation; Quasars; Spectral Line Width; Astronomical Models; Iue; Line Of Sight; Ultraviolet Spectra; Visible Spectrum; Astrophysics full text sources ADS | data products SIMBAD (1) NED (1)