NDLI: The nature of the energy source in liner's

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The nature of the energy source in liner's

Content Provider	NASA Technical Reports Server (NTRS)
Author	Colina, L. Koratkar, Anuradha
Copyright Year	1996
Description	LINER's (low-ionization nuclear emission-line regions) are found in about 30% of all bright galaxies, including luminous infrared galaxies. They form a heterogeneous class powered by a variety of ionizing mechanisms such as low-luminosity AGNs (active galactic nuclei), starbursts, shocks, or any combination of these. In early-type spirals, LINER's are powered by a low-luminosity AGN, or by an AGN surrounded by circumnuclear star-forming regions. In luminous infrared galaxies, LINER's are powered by starbursts with associated wind-related extended shocks, and an AGN may play a minor role, if any. LINER's in some FR I radio galaxies show strong evidence for the presence of a massive central black hole, and there are indications for the existence of shocks in the nuclear disks of these galaxies. Yet, the dominant ionizing mechanism for LINER's in radio-quiet ellipticals and FR I host galaxies is still unclear. Multifrequency high spatial resolution imaging and spectroscopy are essential to discriminate among the different ionizing mechanisms present in LINER's.
File Size	477876
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19970009623
Archival Resource Key	ark:/13960/t86h9gz6p
Language	English
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Astrophysics Active Galactic Nuclei Radio Galaxies Infrared Sources Astronomy Galaxies Starburst Galaxies Ionization Spectral Emission Spiral Galaxies Ultraviolet Emission Black Holes Astronomy Galactic Radiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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