Published February 1987
| Version v1
Journal article
Detection of the He I 10830-A line in the broadline radio galaxy 3C 120
- 1. California Univ., La Jolla
- 2. Aerospace Corp., Los Angeles, CA
Description
The first measurement of He I 10830 A flux in a broadline radio galaxy (BLRG), 3C 120, is reported. The flux is 2.7 x 10 to the -13th erg/sq cm/s. The relative strengths of the 10830 A line and other prominent broad emission lines are 10830 A/He I 5876 A/H-beta/H-alpha = 0.64/0.27/1.00/6.3. Reddening is ruled out as the single source of the large 5876 A/H-beta ratio, and the necessity for either an enhanced helium abundance or an extended He II is obviated. Rather, the line ratios indicate that significant collisional enhancement of 5876 A and H-beta occurs, identical to that observed in Seyfert I galaxies and quasars. 22 references
Additional details
Publishing Information
- Journal Title
- Astron. J.
- Journal Volume
- 93
- Series
- Astron. J.
- Journal Page Range
- 284-286
- ISSN
- 0004-6256
- CODEN
- ANJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 18078150
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- CHEMICAL COMPOSITION; EMISSION SPECTRA; FLUX DENSITY; HELIUM IONS; RADIATION FLUX; RADIO GALAXIES; VISIBLE SPECTRA
- Descriptors DEC
- CHARGED PARTICLES; COSMIC RADIO SOURCES; GALAXIES; IONS; SPECTRA