Other
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250...98m&link_type=abstract
Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 98-102.
Other
12
Emission Spectra, Galactic Nuclei, Infrared Spectra, Near Infrared Radiation, Seyfert Galaxies, Spectrophotometry, Cosmic Dust, Hydrogen, Interstellar Extinction, Line Spectra, Red Shift, Spectrum Analysis, Stellar Spectra
Scientific paper
Two to four micron spectrophotometry of the Seyfert 1.5 galaxy NGC 4151 has been obtained. The B-alpha and B-gamma lines of hydrogen have been detected with strengths of 4.2 + or - 0.7 and 1.9 + or - 0.2 x 10 to the -13th ergs/sq cm per sec, respectively. The B-alpha/H-gamma ratio has been used to derive an upper limit, E(B-V) not greater than 0.13 mag, for the reddening toward the line formation regions of the nucleus. The 2-4 micron continuum of NGC 4151 can be adequately fitted by two black bodies, one representing a stellar component and the other strong thermal dust emission. No more than 10% of the total emission at 2 microns can be attributed to any nonthermal spectral distribution.
McAlary Christopher Walter
McLaren Robert A.
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