A Black Hole Feedback Valve in Massive Galaxies

J 2020

A Black Hole Feedback Valve in Massive Galaxies

VOIT, G.M., G.L. BRYAN, D. PRASAD, R. FRISBIE, Y. LI et. al.

Základní údaje

Originální název

A Black Hole Feedback Valve in Massive Galaxies

Autoři

VOIT, G.M., G.L. BRYAN, D. PRASAD, R. FRISBIE, Y. LI, M. DONAHUE, B.W. OSHEA, M. SUN a Norbert WERNER

Vydání

Astrophysical Journal, Chicago, University of Chicago Press, 2020, 0004-637X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.874

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.3847/1538-4357/aba42e

UT WoS

000561546600001

Klíčová slova anglicky

Early-type galaxies; Elliptical galaxies; Giant elliptical galaxies; Quenched galaxies; Red sequence galaxies; X-ray astronomy; Circumgalactic medium

Štítky

RIV ne

Změněno: 15. 2. 2024 09:27, Mgr. Marie Šípková, DiS.

Anotace

V originále

Star formation in the universe's most massive galaxies proceeds furiously early in time but then nearly ceases. Plenty of hot gas remains available but does not cool and condense into star-forming clouds. Active galactic nuclei (AGNs) release enough energy to inhibit cooling of the hot gas, but energetic arguments alone do not explain why quenching of star formation is most effective in high-mass galaxies. In fact, optical observations show that quenching is more closely related to a galaxy's central stellar velocity dispersion (sigma(v)) than to any other characteristic. Here we show that high sigma(v) is critical to quenching because a deep central potential well maximizes the efficacy of AGN feedback. In order to remain quenched, a galaxy must continually sweep out the gas ejected from its aging stars. Supernova heating can accomplish this task as long as the AGN sufficiently reduces the gas pressure of the surrounding circumgalactic medium (CGM). We find that CGM pressure acts as the control knob on a valve that regulates AGN feedback and suggest that feedback power self-adjusts so that it suffices to lift the CGM out of the galaxy's potential well. Supernova heating then drives a galactic outflow that remains homogeneous if sigma(v) greater than or similar to 240 km s(-1). The AGN feedback can effectively quench galaxies with a comparable velocity dispersion, but feedback in galaxies with a much lower velocity dispersion tends to result in convective circulation and accumulation of multiphase gas within the galaxy.

Návaznosti

MUNI/I/0003/2020, interní kód MU

Název: MUNI Award in Science and Humanities 3 (Akronym: Space-Based High-Energy Astrophysics)

Investor: Masarykova univerzita, MUNI Award in Science and Humanities 3, MASH - MUNI Award in Science and Humanities

Citovat

VOIT, G.M., G.L. BRYAN, D. PRASAD, R. FRISBIE, Y. LI, M. DONAHUE, B.W. OSHEA, M. SUN a Norbert WERNER. A Black Hole Feedback Valve in Massive Galaxies. Astrophysical Journal. Chicago: University of Chicago Press, 2020, roč. 899, č. 1, s. 1-23. ISSN 0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/aba42e.

@article{1680111,
   author = {Voit, G.M. and Bryan, G.L. and Prasad, D. and Frisbie, R. and Li, Y. and Donahue, M. and OShea, B.W. and Sun, M. and Werner, Norbert},
   article_location = {Chicago},
   article_number = {1},
   doi = {http://dx.doi.org/10.3847/1538-4357/aba42e},
   keywords = {Early-type galaxies; Elliptical galaxies; Giant elliptical galaxies; Quenched galaxies; Red sequence galaxies; X-ray astronomy; Circumgalactic medium},
   language = {eng},
   issn = {0004-637X},
   journal = {Astrophysical Journal},
   note = {Žádný z autorů nemá afiliaci k MU. Neodvádět do RIVu.},
   title = {A Black Hole Feedback Valve in Massive Galaxies},
   url = {https://iopscience.iop.org/article/10.3847/1538-4357/aba42e/pdf},
   volume = {899},
   year = {2020}
}

TY  - JOUR
ID  - 1680111
AU  - Voit, G.M. - Bryan, G.L. - Prasad, D. - Frisbie, R. - Li, Y. - Donahue, M. - OShea, B.W. - Sun, M. - Werner, Norbert
PY  - 2020
TI  - A Black Hole Feedback Valve in Massive Galaxies
JF  - Astrophysical Journal
VL  - 899
IS  - 1
SP  - 1-23
EP  - 1-23
PB  - University of Chicago Press
SN  - 0004637X
N1  - Žádný z autorů nemá afiliaci k MU. Neodvádět do RIVu.
KW  - Early-type galaxies
KW  - Elliptical galaxies
KW  - Giant elliptical galaxies
KW  - Quenched galaxies
KW  - Red sequence galaxies
KW  - X-ray astronomy
KW  - Circumgalactic medium
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aba42e/pdf
L2  - https://iopscience.iop.org/article/10.3847/1538-4357/aba42e/pdf
N2  - Star formation in the universe's most massive galaxies proceeds furiously early in time but then nearly ceases. Plenty of hot gas remains available but does not cool and condense into star-forming clouds. Active galactic nuclei (AGNs) release enough energy to inhibit cooling of the hot gas, but energetic arguments alone do not explain why quenching of star formation is most effective in high-mass galaxies. In fact, optical observations show that quenching is more closely related to a galaxy's central stellar velocity dispersion (sigma(v)) than to any other characteristic. Here we show that high sigma(v) is critical to quenching because a deep central potential well maximizes the efficacy of AGN feedback. In order to remain quenched, a galaxy must continually sweep out the gas ejected from its aging stars. Supernova heating can accomplish this task as long as the AGN sufficiently reduces the gas pressure of the surrounding circumgalactic medium (CGM). We find that CGM pressure acts as the control knob on a valve that regulates AGN feedback and suggest that feedback power self-adjusts so that it suffices to lift the CGM out of the galaxy's potential well. Supernova heating then drives a galactic outflow that remains homogeneous if sigma(v) greater than or similar to 240 km s(-1). The AGN feedback can effectively quench galaxies with a comparable velocity dispersion, but feedback in galaxies with a much lower velocity dispersion tends to result in convective circulation and accumulation of multiphase gas within the galaxy.
ER  -

VOIT, G.M., G.L. BRYAN, D. PRASAD, R. FRISBIE, Y. LI, M. DONAHUE, B.W. OSHEA, M. SUN a Norbert WERNER. A Black Hole Feedback Valve in Massive Galaxies. \textit{Astrophysical Journal}. Chicago: University of Chicago Press, 2020, roč.~899, č.~1, s.~1-23. ISSN~0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/aba42e.

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