NSF Org:	AST Division Of Astronomical Sciences
Recipient:	THE REGENTS OF THE UNIVERSITY OF COLORADO
Initial Amendment Date:	September 29, 1992
Latest Amendment Date:	June 10, 1994
Award Number:	9120599
Award Instrument:	Continuing Grant
Program Manager:	Sethanne Howard AST  Division Of Astronomical Sciences MPS  Directorate for Mathematical and Physical Sciences
Start Date:	October 1, 1992
End Date:	March 31, 1997 (Estimated)
Total Intended Award Amount:	$300,000.00
Total Awarded Amount to Date:	$300,000.00
Funds Obligated to Date:	FY 1992 = $71,764.00 FY 1993 = $129,236.00 FY 1994 = $99,000.00
History of Investigator:	Mitchell Begelman (Principal Investigator) mitch@jila.colorado.edu
Recipient Sponsored Research Office:	University of Colorado at Boulder 3100 MARINE ST Boulder CO  US  80309-0001 (303)492-6221
Sponsor Congressional District:	02
Primary Place of Performance:	DATA NOT AVAILABLE
Primary Place of Performance Congressional District:
Unique Entity Identifier (UEI):	SPVKK1RC2MZ3
Parent UEI:
NSF Program(s):	PLANETARY ASTRONOMY, EXTRAGALACTIC ASTRON & COSMOLO, ADVANCED TECHNOLOGIES & INSTRM, RADIO SPECTRUM MANAGEMENT, SPECIAL PROGRAMS-RESERVE
Primary Program Source:	app-0193  app-0194
Program Reference Code(s):	0000, 9256, OTHR
Program Element Code(s):	121400, 121700, 121800, 465000, 914500
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.049

ABSTRACT

Diverse manifestations of violent activity in the nuclei of galaxies are believed to result from the interactions of matter with a supermassive black hole. However, the details of these interactions and their observational signatures are not well understood. This award will support theoretical research studying three important classes of phenomena in active galactic nuclei (AGNs): the formation of relativistic jets, the production of X-ray spectra, and interactions involving ultrarelativistic particles. The investigations described in this proposal will address the questions: Why do some AGNs produce powerful jets while others do not? What can X-ray observations tell us about the temperatures, densities, and spatial organization of matter close to the black hole? What roles (if any) do ultrarelativistic particles play in shaping the energy output of an AGN, and how does this energy affect the environment of the AGN? The long-term goals of this research are: 1) to determine whether the interactions of matter with a supermassive black hole really are responsible for AGN phenomena; 2) to understand in detail how these interactions take place: and 3) to learn what effects nuclear activity can have on the appearance and evolution of the host galaxy.

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