NDLI: Extragalactic infrared spectroscopy

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Extragalactic infrared spectroscopy

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wade, R. Gatley, I. Graham, J. R. Wright, G. S. Joseph, R. D. Prestwich, A. H.
Copyright Year	1987
Description	The spectra of galaxies in the near infrared atmospheric transmission windows are explored. Emission lines were detected due to molecular hydrogen, atomic hydrogen recombination lines, a line attributed to FEII, and a broad CO absorption feature. Lines due to H2 and FEII are especially strong in interacting and merging galaxies, but they were also detected in Seyferts and normal spirals. These lines appear to be shock excited. Multi-aperture measurements show that they emanate from regions as large as 15 kpc. It is argued that starbursts provide the most plausible and consistent model for the excitation of these lines, but the changes of relative line intensity of various species with aperture suggest that other excitation mechanisms are also operating in the outer regions of these galaxies.
File Size	601456
Page Count	13
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870014895
Archival Resource Key	ark:/13960/t9f52jv32
Language	English
Publisher Date	1987-05-01
Access Restriction	Open
Subject Keyword	Astronomy Stellar Spectra Hydrogen Recombinations Radio Bursts Iron Infrared Spectra Near Infrared Radiation Seyfert Galaxies Star Formation Spectral Emission Hydrogen Atoms Spiral Galaxies Carbon Monoxide Atmospheric Windows Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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