Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...205...29n&link_type=abstract
Astrophysical Journal, vol. 205, Apr. 1, 1976, pt. 1, p. 29-43.
Astronomy and Astrophysics
Astrophysics
135
Galactic Radiation, Infrared Spectra, Markarian Galaxies, Seyfert Galaxies, Spectrophotometry, Cosmic Dust, Emission Spectra, H Ii Regions, Nebulae, Nonthermal Radiation, Spectral Energy Distribution
Scientific paper
Slit spectra, spectrophotometric scans, and infrared broad-band observations are presented for 18 Markarian galaxies with emission lines. Eight of the program galaxies can be classified as Seyfert galaxies. Arguments are given that thermal, nonthermal, and stellar radiation components are present. Broadly speaking, one group of Seyfert galaxies is characterized both by the presence of a high-density region of gas and by a continuum dominated by nonthermal radiation. The continua of the remaining program Seyferts, which do not have a high-density region of gas, are dominated by thermal radiation from dust and a stellar continuum. The 10 galaxies which are not Seyfert galaxies are shown to be examples of extragalactic H II regions; there is evidence for thermal emission from dust being present at 10 microns in four of these galaxies.
Becklin Eric E.
Neugebauer Gernot
Oke Bev J.
Searle Leonard
No associations
LandOfFree
Optical and infrared spectrophotometry of 18 Markarian 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 Optical and infrared spectrophotometry of 18 Markarian galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical and infrared spectrophotometry of 18 Markarian galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1612046