Control/Tracking Number: 219-RC-1695-AAS Activity: Research Contributed Current Date/Time: 10/5/2011 5:27:39 PM Simulating the Cooling Flow of Cool-Core Clusters
Author Block: Yuan Li1, G. L. Bryan1 1Columbia University.
Abstract: We carry out high-resolution adaptive mesh refinement simulation of a cool core cluster, resolving the flow from Mpc scales down to pc scales. We do not (yet) include any heating, focusing instead on the development of the cooling instabilities in order to understand how gas gets to the supermassive black hole (SMBH) at the center of the cluster. We find that, as the gas cools, the cluster develops a very flat temperature profile, undergoing a global cooling instability only in the central 100 pc of the cluster. Outside of this region, the flow is smooth, with no local cooling instabilities, and nat- urally produces very little low-temperature gas (below a few keV), in agreement with observations. The gas cools and condenses in the very center of the cluster, rapidly forming a thin accretion disk. Isotropic heat conduction does not affect the result, but we show that it is very sensitive to resolution, requiring very high mass resolution to correctly reproduce the small transition radius. The amount of cold gas produced at the very center grows rapidly until a reasonable estimate of the resulting AGN heating rate (assuming even a moderate accretion efficiency) overwhelms cooling. We argue that this naturally produces a thermostat which links the cooling of gas out to 100 kpc with the cold gas accretion in the central 100 pc, potentially closing the loop between cooling and heating. Plain-Language Abstract: We carry out high-resolution simulation on how gas cools and gets to the supermassive black hole in the center of a galaxy cluster. We find that cooling catastrophe happens only in the very center of the cluster while outside, the flow is smooth and produces very little low-temperature gas. Speaker Agreement (Complete): : I have read and accept this agreement
Linking Groups (Complete): None selected Category (Complete): 29. Galaxy Clusters Preplanned Sessions (Complete): Presentation Preference (Complete): Poster Additional Info (Complete): Has this work been submitted in any form to a journal or preprint server, or if you expect it to be submitted between now and the meeting?: Yes If you selected yes, to what publication(s) and/or preprint server(s) has this work been (or will this work be) submitted? : ApJ Is this your first presentation at an AAS Meeting?: No Student Status: Graduate Student Students may enter their posters into the Chambliss Astronomy Achievement Student Award contest. Would you like your poster entered? Yes I am willing to serve as a poster Judge: Yes
Status: Complete American Astronomical Society 2000 Florida Ave., NW Suite 400 Washington, DC 20009 FOR TECHNICAL SUPPORT: 217-398-1792 (Monday through Friday 9:00 am-5:00 pm Central Standard Time) or OASIS Helpdesk
Apr 4, 2014 - The conference to be held at Mercy College in the Rotunda (Dobbs Ferry campus), will include platform and poster presentations. We can ...
Integrating sex-gender knowledge into science curriculum and researcher training. ⢠Gender aspects of leadership. ⢠Integrating gender analysis into policy design, impact evaluation and policy agendas ... What data was collected, and.
Page 1 of 4. Abstract Submission Guidelines. Thank you for your interest in submitting an abstract for Gender Summit Europe 9. Please. make sure you have read these Gender Summit Abstract Guidelines before submitting you. abstract. Accepted abstracts
Sep 2, 2012 - Venue: Conference rooms at 'Titech Front' and lecture rooms of. Tokyo Institute of Technology (Ookayma Campus, æ±äº¬å·¥æ¥å¤§å¦ã»å¤§å²¡å±±å°åº).
Australians, rural and regional communities, and small business) who, today, remain reliant on .... If extended to American Express and. Diners Club (as ...
Email: [email protected]. Level 6, 14 Martin Place ..... Recommendation 10: APCA would support the exploration of a national digital identity strategy and ...
Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. Oasis - Wonderwall.pdf. Oasis - Wonderwall.pdf. Open. Extract.
Whoops! There was a problem loading this page. Retrying... Whoops! There was a problem previewing this document. Retrying... Download. Connect more apps ...
Location: BiogeografÃa de Medios Litorales: Dinámicas y conservación (2014), ISBN 978-84-617-. 1068-3, pages 185-188. Language: Spanish. Near the town of ...
Nov 3, 1999 - it is to develop applications with these properties. This makes Mozart particularly well-suited for build- ing agent applications. We give a ...
Sign in. Page. 1. /. 13. Loading⦠Page 1 of 13. Page 1 of 13. Page 2 of 13. Page 2 of 13. Page 3 of 13. Page 3 of 13. OASIS Form0001.pdf. OASIS Form0001.pdf.
Page 1. Whoops! There was a problem loading more pages. Oasis - Live Forever.pdf. Oasis - Live Forever.pdf. Open. Extract. Open with. Sign In. Main menu.
There is an alternative to increased surveillance as a means of preventing crime ... interventions, e.g. street lighting and video surveillance, or street lighting and ...
lead us to have a more positive image of our neighbourhood, and our neighbourhood will moreover appear better cared for. This in turn strengthens community ...
Page 1 of 1. Oasis â Roll With It. You gotta roll with it. You gotta take your time. You gotta say what you say. Don't let anybody get in your way. 'Cause it's all too ...
