He I 10830-A observations of Seyfert 2 galaxies

Details He I 10830-A observations of Seyfert 2 galaxies He I 10830-A observations of Seyfert 2 galaxies

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341..120r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 341, June 1, 1989, p. 120-128. Research supported by the Aerospace Corp. an

Astronomy and Astrophysics

Astrophysics

6

Galactic Nuclei, Infrared Spectra, Infrared Spectrophotometers, Photoionization, Seyfert Galaxies, H Alpha Line, H Beta Line, Optical Thickness

Scientific paper

Measurements of the 10830-A transition of neutral helium are presented for 12 Seyfert 2 galaxies and the emission-line radio galaxy NGC 1275. The observed 10830-A to He I 5876-A ratios for these objects range from 4 to 24, showing that the objects are reddened. For a number of these galaxies, the observed H-alpha/H-beta values exceed that expected with uniform mixing of dust and gas. The results suggest that one or more mechanisms are destroying the 10830-A photons or are depopulating the 2 3S level. Three previously proposed mechanisms to explain this process are evaluated and it is found that all of the proposed mechanisms are lacking.

Affiliated with

Also associated with

No associations

Rating

He I 10830-A observations of Seyfert 2 galaxies 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 He I 10830-A observations of Seyfert 2 galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and He I 10830-A observations of Seyfert 2 galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1849986