Published April 1, 1989
| Version v1
Journal article
Reddening in the narrow-line region of active galactic nuclei
Creators
- 1. Bulgarian Academy of Sciences, Sofia (Bulgaria). Dept. of Astronomy and National Astronomical Observatory
- 2. Sofia Univ. (Bulgaria)
Description
The use of forbidden lines of approximately equal critical density as a reddening indicator for the narrow-line regions of AGN is suggested. An R3/R6 diagram [line ratios [S II](λλ6717 + 6731)/[O II](λλ3726 + 3729) and [S II](λλ4069 + 4076)/[O II](λλ7320 + 7330)] is used for reddening estimates in 25 objects taken from the literature. A slight tendency for the reddening of NLR to be higher in type 2 than in type 1 objects is observed. We compare the reddening values derived from the Balmer decrement, the S II/O II and the R3/R6 methods. (author)
Additional details
Publishing Information
- Journal Title
- Monthly Notices of the Royal Astronomical Society
- Journal Volume
- 237
- Journal Issue
- 3
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 707-714
- ISSN
- 0035-8711
- CODEN
- MNRAA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 20054511
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ABSORPTION; BALMER LINES; DATA PROCESSING; EMISSION SPECTRA; GALAXY NUCLEI; OXYGEN IONS; QUANTITY RATIO; SULFUR IONS; VISIBLE SPECTRA
- Descriptors DEC
- ATOMIC IONS; CHARGED PARTICLES; IONS; SPECTRA