Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448
Abstract
Abstract We present a multiwavelength analysis of the galaxy cluster SPT-CL J0607-4448 (SPT0607), which is one of the most distant clusters discovered by the South Pole Telescope at z = 1.4010 ± 0.0028. The high-redshift cluster shows clear signs of being relaxed with well-regulated feedback from the active galactic nucleus (AGN) in the brightest cluster galaxy (BCG). Using Chandra X-ray data, we construct thermodynamic profiles and determine the properties of the intracluster medium. The cool-core nature of the cluster is supported by a centrally peaked density profile and low central entropy ( keV cm 2 ), which we estimate assuming an isothermal temperature profile due to the limited spectral information given the distance to the cluster. Using the density profile and gas cooling time inferred from the X-ray data, we find a mass-cooling rate yr −1 . From optical spectroscopy and photometry around the [O ii ] emission line, we estimate that the BCG star formation rate is yr −1 , roughly two orders of magnitude lower than the predicted mass-cooling rate. In addition, using ATCA radio data at 2.1 GHz, we measure a radio jet power erg s −1 , which is consistent with the X-ray cooling luminosity ( erg s −1 within r cool = 43 kpc). These findings suggest that SPT0607 is a relaxed, cool-core cluster with AGN-regulated cooling at an epoch shortly after cluster formation, implying that the balance between cooling and feedback can be reached quickly. We discuss the implications for these findings on the evolution of AGN feedback in galaxy clusters.
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Gordon and Betty Moore Foundation; Australian Research Councils Discovery Projects
- OSTI Identifier:
- 1961488
- Alternate Identifier(s):
- OSTI ID: 1909868
- Report Number(s):
- FERMILAB-PUB-23-014-PPD; arXiv:2301.00830
Journal ID: ISSN 0004-637X
- Grant/Contract Number:
- AC02-06CH11357; AC02-07CH11359; PLR-1248097; OPP-1852617; PHY-1125897; GBMF#947; DP200101068
- Resource Type:
- Published Article
- Journal Name:
- The Astrophysical Journal
- Additional Journal Information:
- Journal Name: The Astrophysical Journal Journal Volume: 944 Journal Issue: 2; Journal ID: ISSN 0004-637X
- Publisher:
- American Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; brightest cluster galaxies; galaxy clusters; intracluster medium; radio galaxies; high-redshift galaxy clusters
Citation Formats
Masterson, Megan, McDonald, Michael, Ansarinejad, Behzad, Bayliss, Matthew, Benson, Bradford A., Bleem, Lindsey E., Calzadilla, Michael S., Edge, Alastair C., Floyd, Benjamin, Kim, Keunho J., Khullar, Gourav, and Somboonpanyakul, Taweewat. Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448. United States: N. p., 2023.
Web. doi:10.3847/1538-4357/acae9e.
Masterson, Megan, McDonald, Michael, Ansarinejad, Behzad, Bayliss, Matthew, Benson, Bradford A., Bleem, Lindsey E., Calzadilla, Michael S., Edge, Alastair C., Floyd, Benjamin, Kim, Keunho J., Khullar, Gourav, & Somboonpanyakul, Taweewat. Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448. United States. https://doi.org/10.3847/1538-4357/acae9e
Masterson, Megan, McDonald, Michael, Ansarinejad, Behzad, Bayliss, Matthew, Benson, Bradford A., Bleem, Lindsey E., Calzadilla, Michael S., Edge, Alastair C., Floyd, Benjamin, Kim, Keunho J., Khullar, Gourav, and Somboonpanyakul, Taweewat. Mon .
"Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448". United States. https://doi.org/10.3847/1538-4357/acae9e.
@article{osti_1961488,
title = {Evidence for AGN-regulated Cooling in Clusters at z ∼ 1.4: A Multiwavelength View of SPT-CL J0607-4448},
author = {Masterson, Megan and McDonald, Michael and Ansarinejad, Behzad and Bayliss, Matthew and Benson, Bradford A. and Bleem, Lindsey E. and Calzadilla, Michael S. and Edge, Alastair C. and Floyd, Benjamin and Kim, Keunho J. and Khullar, Gourav and Somboonpanyakul, Taweewat},
abstractNote = {Abstract We present a multiwavelength analysis of the galaxy cluster SPT-CL J0607-4448 (SPT0607), which is one of the most distant clusters discovered by the South Pole Telescope at z = 1.4010 ± 0.0028. The high-redshift cluster shows clear signs of being relaxed with well-regulated feedback from the active galactic nucleus (AGN) in the brightest cluster galaxy (BCG). Using Chandra X-ray data, we construct thermodynamic profiles and determine the properties of the intracluster medium. The cool-core nature of the cluster is supported by a centrally peaked density profile and low central entropy ( K 0 = 18 − 9 + 11 keV cm 2 ), which we estimate assuming an isothermal temperature profile due to the limited spectral information given the distance to the cluster. Using the density profile and gas cooling time inferred from the X-ray data, we find a mass-cooling rate M ̇ cool = 100 − 60 + 90 M ⊙ yr −1 . From optical spectroscopy and photometry around the [O ii ] emission line, we estimate that the BCG star formation rate is SFR [ O II ] = 1.7 − 0.6 + 1.0 M ⊙ yr −1 , roughly two orders of magnitude lower than the predicted mass-cooling rate. In addition, using ATCA radio data at 2.1 GHz, we measure a radio jet power P cav = 3.2 − 1.3 + 2.1 × 10 44 erg s −1 , which is consistent with the X-ray cooling luminosity ( L cool = 1.9 − 0.5 + 0.2 × 10 44 erg s −1 within r cool = 43 kpc). These findings suggest that SPT0607 is a relaxed, cool-core cluster with AGN-regulated cooling at an epoch shortly after cluster formation, implying that the balance between cooling and feedback can be reached quickly. We discuss the implications for these findings on the evolution of AGN feedback in galaxy clusters.},
doi = {10.3847/1538-4357/acae9e},
journal = {The Astrophysical Journal},
number = 2,
volume = 944,
place = {United States},
year = {Mon Feb 27 00:00:00 EST 2023},
month = {Mon Feb 27 00:00:00 EST 2023}
}
https://doi.org/10.3847/1538-4357/acae9e
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