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@article{1680100,
author = {Frisbie, R.L.S. and Donahue, M. and Voit, G.M. and Connor, T. and Li, Y. and Sun, M. and Lakhchaura, K. and Werner, Norbert and Grossová, Romana},
article_location = {Chicago},
article_number = {2},
doi = {http://dx.doi.org/10.3847/1538-4357/aba8a8},
keywords = {AGN host galaxies; Early-type galaxies; Radio galaxies},
language = {eng},
issn = {0004-637X},
journal = {Astrophysical Journal},
title = {Properties of the Hot Ambient Medium of Early-type Galaxies Hosting Powerful Radio Sources},
url = {https://arxiv.org/pdf/2006.12568.pdf},
volume = {899},
year = {2020}
}
TY - JOUR
ID - 1680100
AU - Frisbie, R.L.S. - Donahue, M. - Voit, G.M. - Connor, T. - Li, Y. - Sun, M. - Lakhchaura, K. - Werner, Norbert - Grossová, Romana
PY - 2020
TI - Properties of the Hot Ambient Medium of Early-type Galaxies Hosting Powerful Radio Sources
JF - Astrophysical Journal
VL - 899
IS - 2
SP - 1-10
EP - 1-10
PB - University of Chicago Press
SN - 0004637X
KW - AGN host galaxies
KW - Early-type galaxies
KW - Radio galaxies
UR - https://arxiv.org/pdf/2006.12568.pdf
N2 - We present an archival analysis of Chandra X-ray observations for 12 nearby early-type galaxies hosting radio sources with radio power >10(23)W Hz(-1)at 1.4 GHz, similar to the radio power of the radio source in NGC 4261. Previously, in a similar analysis of eight nearby X-ray and optically bright elliptical galaxies, Werner et al. found that NGC 4261 exhibited unusually low central gas entropy compared to the full sample. In the central 0.3 kpc of NGC 4261, the ratio of cooling time to freefall time (t(cool)/t(ff)) is less than 10, indicating that cold clouds may be precipitating out of the hot ambient medium and providing fuel for accretion in the central region. NGC 4261 also hosts the most powerful radio source in the original sample. Because NGC 4261 may represent an important phase during which powerful feedback from a central active galactic nucleus (AGN) is fueled by multiphase condensation in the central kiloparsec, we searched the Chandra archive for analogs to NGC 4261. We present entropy profiles of those galaxies, as well as profiles oft(cool)/t(ff). We find that one of them, IC 4296, exhibits properties similar to NGC 4261, including the presence of only single-phase gas outside ofr similar to 2 kpc and a similar central velocity dispersion. We compare the properties of NGC 4261 and IC 4296 to hydrodynamic simulations of AGN feedback fueled by precipitation. Over the course of those simulations, the single-phase galaxy has an entropy gradient that remains similar to the entropy profiles inferred from our observations.
ER -
FRISBIE, R.L.S., M. DONAHUE, G.M. VOIT, T. CONNOR, Y. LI, M. SUN, K. LAKHCHAURA, Norbert WERNER a Romana GROSSOVÁ. Properties of the Hot Ambient Medium of Early-type Galaxies Hosting Powerful Radio Sources. \textit{Astrophysical Journal}. Chicago: University of Chicago Press, 2020, roč.~899, č.~2, s.~1-10. ISSN~0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/aba8a8.
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