A Caltech Library Service

The Extreme Nuclear Environments of Sgr A* and Arp 220

Scoville, N. Z. (2009) The Extreme Nuclear Environments of Sgr A* and Arp 220. In: The starburst-AGN connection. ASP Conference Series. No.408. Astronomical Society of the Pacific , San Francisco, CA, pp. 95-104. ISBN 978-1-58381-696-7.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The dense ISM which is the fuel for both nuclear starbursts is believed to be accreted to the nucleus by stellar bars and galactic interactions. In this contribution, I summarize the observational results for two galactic nuclei at the extreme ends of starburst/AGN activity − our own Galactic nucleus with SgrA* and the ULIRG Arp 220. I discuss theoretical considerations for the properties of the ISM − its density and scale height, whether it is likely to clump into gravitational bound GMCs − and the self-regulation of SB and AGN fueling due to radiation pressure support of the ISM. The latter yields an Eddington-like limit on the activity for both SB and AGN, corresponding to approximately 500 L_ʘ/M_ʘ for optically thick regions in which the radiation has been degraded to the NIR.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Scoville, N. Z.0000-0002-0438-3323
Additional Information:© 2009 Astronomical Society of the Pacific. It is a please to acknowledge the wonderful organization and hospitality of the scientists at Shanghai Normal University and their administration.
Series Name:ASP Conference Series
Issue or Number:408
Record Number:CaltechAUTHORS:20100915-075900702
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19958
Deposited By: Tony Diaz
Deposited On:16 Sep 2010 23:23
Last Modified:03 Oct 2019 02:03

Repository Staff Only: item control page