HOT GASEOUS CORONAE AROUND SPIRAL GALAXIES: PROBING THE ILLUSTRIS SIMULATION
Name
Bogdan-2015-HOT GASEOUS CORONAE.pdf
Size
933.67 KB
Format
Adobe PDF
Checksum (MD5)
6b1326b60cef8e718669cf71dc3419d2
Author(s)
Vogelsberger, Mark
Kraft, Ralph P.
Hernquist, Lars
Gilfanov, Marat
Churazov, Eugene
Genel, Shy
Forman, William R.
Murray, Stephen S.
Vikhlinin, Alexey
Jones, Christine
Date Issued
May 2015
Journal
The Astrophysical Journal
Publisher
IOP Publishing
Citation
Bogdán, Ákos, Mark Vogelsberger, Ralph P. Kraft, Lars Hernquist, Marat Gilfanov, Paul Torrey, Eugene Churazov, et al. “HOT GASEOUS CORONAE AROUND SPIRAL GALAXIES: PROBING THE ILLUSTRIS SIMULATION.” The Astrophysical Journal 804, no. 1 (May 1, 2015): 72. © 2015 The American Astronomical Society
Version
Final published version
Abstract
The presence of hot gaseous coronae around present-day massive spiral galaxies is a fundamental prediction of galaxy formation models. However, our observational knowledge remains scarce, since to date only four gaseous coronae have been detected around spirals with massive stellar bodies ([> over ~]2 X 10[superscript 11] M[subscript ʘ]). To explore the hot coronae around lower mass spiral galaxies, we utilized Chandra X-ray observations of a sample of eight normal spiral galaxies with stellar masses of (0.7 - 2.0) X 10[superscript 11] M[subscript ʘ]. Although statistically significant diffuse X-ray emission is not detected beyond the optical radii (~20 kpc) of the galaxies, we derive 3σ limits on the characteristics of the coronae. These limits, complemented with previous detections of NGC 1961 and NGC 6753, are used to probe the Illustris Simulation. The observed 3σ upper limits on the X-ray luminosities and gas masses exceed or are at the upper end of the model predictions. For NGC 1961 and NGC 6753 the observed gas temperatures, metal abundances, and electron density profiles broadly agree with those predicted by Illustris. These results hint that the physics modules of Illustris are broadly consistent with the observed properties of hot coronae around spiral galaxies. However, one shortcoming of Illustris is that massive black holes, mostly residing in giant ellipticals, give rise to powerful radio-mode active galactic nucleus feedback, which results in under-luminous coronae for ellipticals.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/0004-637x/804/1/72
