Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..756b&link_type=abstract
Astrophysical Journal, Part 1, vol. 243, Feb. 1, 1981, p. 756-764. NSF-supported research.
Astronomy and Astrophysics
Astronomy
83
Astronomical Photometry, Galactic Nuclei, Infrared Astronomy, Near Infrared Radiation, Seyfert Galaxies, Emission Spectra, Error Analysis, Spectral Line Width
Scientific paper
Infrared J, H, and K observations are given for the nuclei of 107 galaxies, including 44 nuclei with blue colors or strong emission lines but not classified as Seyferts, 33 nuclei classified morphologically as being bright and compact, and 30 Seyfert galaxies. Comparison of (U - B) and (J - K) colors shows that most galaxies with (J - K) greater than 1.1 are Seyferts regardless of the (U - B). Such near-infrared excesses are attributed primarily to nonthermal continua rather than dust reradiation, because galaxy nuclei with bright ultraviolet continua not classified spectroscopically as Seyferts do not show infrared colors different from those expected for composite starlight. Virtually all nuclei with emission lines less than 250 km/s in width have the near-infrared colors of starlight, which quantifies suspicions that both broad emission lines and near-infrared color excesses are consequences of nonthermal processes.
Balzano Vicki A.
Weedman Dan W.
No associations
LandOfFree
The near-infrared properties of galactic nuclei 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 near-infrared properties of galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The near-infrared properties of galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1407141