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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. https://resolver.caltech.edu/CaltechAUTHORS:20100915-075900702

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Abstract

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
http://www.aspbooks.org/a/volumes/article_details/?paper_id=30206PublisherArticle
ORCID:
AuthorORCID
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:https://resolver.caltech.edu/CaltechAUTHORS:20100915-075900702
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19958
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Sep 2010 23:23
Last Modified:03 Oct 2019 02:03

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