XRISM Constrains Atmospheric Motion and Turbulent Dissipation
in the Archetypal Radio-mode Feedback System Hydra-A

J 2025

XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A

ROSE, Tom; B R MCNAMARA; Julian MEUNIER; A C FABIAN; Helen RUSSELL et al.

Základní údaje

Originální název

XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A

Autoři

Vydání

Astrophysical Journal, Bristol, IOP Publishing Ltd, 2025, 0004-637X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.400 v roce 2024

Označené pro přenos do RIV

Ano

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Galaxy clusters; Intracluster medium; X-ray astronomy

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 1. 2026 15:43, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We present XRISM Resolve observations centered on Hydra-A, a redshift z = 0.054 brightest cluster galaxy, which hosts one of the largest and most powerful FR-I radio sources in the nearby Universe. We examine the effects of its high jet power on the velocity structure of the cluster’s hot atmosphere. Hydra-A’s central radio jets have inflated X-ray cavities with energies upward of 1061 erg. They reach altitudes of 225 kpc from the cluster center, well beyond the atmosphere’s central cooling region. Resolve’s 3′× 3′ field of view covers 190 × 190 kpc, which encompasses most of the cooling volume. We find a one-dimensional atmospheric velocity dispersion across the volume of 164 ± 10 km s−1. The fraction in isotropic turbulence or unresolved bulk velocity is unknown. Assuming pure isotropic turbulence, the turbulent kinetic energy is 2.5% of the thermal energy radiated away over the cooling timescale, implying that kinetic energy must be supplied continually to offset cooling. While Hydra-A’s radio jets are powerful enough to supply kinetic energy to the atmosphere at the observed level, turbulent dissipation alone would struggle to offset cooling throughout the cooling volume. The central galaxy’s radial velocity is similar to the atmospheric velocity, with an offset of −37 ± 23 km s−1.

Návaznosti

GX21-13491X, projekt VaV

Název: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Akronym: EHU)

Investor: Grantová agentura ČR, Exploring the Hot Universe and Understanding Comic Feedback

Citovat

ROSE, Tom; B R MCNAMARA; Julian MEUNIER; A C FABIAN; Helen RUSSELL; Paul NULSEN; Neo DIZDAR; Timothy M HECKMAN; Michael MCDONALD; Maxim MARKEVITCH; Frits PAERELS; Aurora SIMIONESCU; Norbert WERNER; Alison L COIL; Edmund HODGES-KLUCK; Eric D MILLER a Michael WISE. XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A. Astrophysical Journal. Bristol: IOP Publishing Ltd, 2025, roč. 990, č. 1, s. 1-8. ISSN 0004-637X. Dostupné z: https://doi.org/10.3847/1538-4357/adf32d.

@article{2546735,
   author = {Rose, Tom and Mcnamara, B R and Meunier, Julian and Fabian, A C and Russell, Helen and Nulsen, Paul and Dizdar, Neo and Heckman, Timothy M and McDonald, Michael and Markevitch, Maxim and Paerels, Frits and Simionescu, Aurora and Werner, Norbert and Coil, Alison L and HodgesandKluck, Edmund and Miller, Eric D and Wise, Michael},
   article_location = {Bristol},
   article_number = {1},
   doi = {https://doi.org/10.3847/1538-4357/adf32d},
   keywords = {Galaxy clusters; Intracluster medium; X-ray astronomy},
   language = {eng},
   issn = {0004-637X},
   journal = {Astrophysical Journal},
   title = {XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A},
   url = {https://iopscience.iop.org/article/10.3847/1538-4357/adf32d},
   volume = {990},
   year = {2025}
}

TY  - JOUR
ID  - 2546735
AU  - Rose, Tom - Mcnamara, B R - Meunier, Julian - Fabian, A C - Russell, Helen - Nulsen, Paul - Dizdar, Neo - Heckman, Timothy M - McDonald, Michael - Markevitch, Maxim - Paerels, Frits - Simionescu, Aurora - Werner, Norbert - Coil, Alison L - Hodges-Kluck, Edmund - Miller, Eric D - Wise, Michael
PY  - 2025
TI  - XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A
JF  - Astrophysical Journal
VL  - 990
IS  - 1
SP  - 1-8
EP  - 1-8
PB  - IOP Publishing Ltd
SN  - 0004637X
KW  - Galaxy clusters
KW  - Intracluster medium
KW  - X-ray astronomy
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/adf32d
N2  - We present XRISM Resolve observations centered on Hydra-A, a redshift z = 0.054 brightest cluster galaxy, which hosts one of the largest and most powerful FR-I radio sources in the nearby Universe. We examine the effects of its high jet power on the velocity structure of the cluster’s hot atmosphere. Hydra-A’s central radio jets have inflated X-ray cavities with energies upward of 1061 erg. They reach altitudes of 225 kpc from the cluster center, well beyond the atmosphere’s central cooling region. Resolve’s 3′× 3′ field of view covers 190 × 190 kpc, which encompasses most of the cooling volume. We find a one-dimensional atmospheric velocity dispersion across the volume of 164 ± 10 km s−1. The fraction in isotropic turbulence or unresolved bulk velocity is unknown. Assuming pure isotropic turbulence, the turbulent kinetic energy is 2.5% of the thermal energy radiated away over the cooling timescale, implying that kinetic energy must be supplied continually to offset cooling. While Hydra-A’s radio jets are powerful enough to supply kinetic energy to the atmosphere at the observed level, turbulent dissipation alone would struggle to offset cooling throughout the cooling volume. The central galaxy’s radial velocity is similar to the atmospheric velocity, with an offset of −37 ± 23 km s−1.
ER  -

ROSE, Tom; B R MCNAMARA; Julian MEUNIER; A C FABIAN; Helen RUSSELL; Paul NULSEN; Neo DIZDAR; Timothy M HECKMAN; Michael MCDONALD; Maxim MARKEVITCH; Frits PAERELS; Aurora SIMIONESCU; Norbert WERNER; Alison L COIL; Edmund HODGES-KLUCK; Eric D MILLER a Michael WISE. XRISM Constrains Atmospheric Motion and Turbulent Dissipation in the Archetypal Radio-mode Feedback System Hydra-A. \textit{Astrophysical Journal}. Bristol: IOP Publishing Ltd, 2025, roč.~990, č.~1, s.~1-8. ISSN~0004-637X. Dostupné z: https://doi.org/10.3847/1538-4357/adf32d.

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