Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr
We present the results of a joint analysis of $Chandra$ X-ray and South Pole Telescope (SPT) SZ observations targeting the first sample of galaxy clusters at $0.3 < z < 1.3$, selected to be the progenitors of well-studied nearby clusters based on their expected accretion rate. We develop a...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Astronomical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/142177 |
| _version_ | 1826208149147746304 |
|---|---|
| author | Ruppin, F McDonald, M Bleem, LE Allen, SW Benson, BA Calzadilla, M Khullar, G Floyd, B |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Ruppin, F McDonald, M Bleem, LE Allen, SW Benson, BA Calzadilla, M Khullar, G Floyd, B |
| author_sort | Ruppin, F |
| collection | MIT |
| description | We present the results of a joint analysis of $Chandra$ X-ray and South Pole
Telescope (SPT) SZ observations targeting the first sample of galaxy clusters
at $0.3 < z < 1.3$, selected to be the progenitors of well-studied nearby
clusters based on their expected accretion rate. We develop a new procedure in
order to tackle the analysis challenge that is estimating the intracluster
medium (ICM) properties of low-mass and high-redshift clusters with ${\sim}150$
X-ray counts. One of the dominant sources of uncertainty on the ICM density
profile estimated with a standard X-ray analysis with such shallow X-ray data
is due to the systematic uncertainty associated with the ICM temperature
obtained through the analysis of the background-dominated X-ray spectrum. We
show that we can decrease the uncertainty on the density profile by a factor
${\sim}5$ with a joint deprojection of the X-ray surface brightness profile
measured by $Chandra$ and the SZ integrated Compton parameter available in the
SPT cluster catalog. We apply this technique to the whole sample of 67 clusters
in order to track the evolution of the ICM core density during cluster growth.
We confirm that the evolution of the gas density profile is well modeled by the
combination of a fixed core and a self-similarly evolving non-cool core
profile. We show that the fraction of cool-cores in this sample is remarkably
stable with redshift although clusters have gained a factor ${\sim}4$ in total
mass over the past ${\sim}9$ Gyr. This new sample combined with our new
X-ray/SZ analysis procedure and extensive multi-wavelength data will allow us
to address fundamental shortcomings in our current understanding of cluster
formation and evolution at $z > 1$. |
| first_indexed | 2024-09-23T14:01:17Z |
| format | Article |
| id | mit-1721.1/142177 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:01:17Z |
| publishDate | 2022 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1421772023-08-10T20:22:34Z Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr Ruppin, F McDonald, M Bleem, LE Allen, SW Benson, BA Calzadilla, M Khullar, G Floyd, B MIT Kavli Institute for Astrophysics and Space Research We present the results of a joint analysis of $Chandra$ X-ray and South Pole Telescope (SPT) SZ observations targeting the first sample of galaxy clusters at $0.3 < z < 1.3$, selected to be the progenitors of well-studied nearby clusters based on their expected accretion rate. We develop a new procedure in order to tackle the analysis challenge that is estimating the intracluster medium (ICM) properties of low-mass and high-redshift clusters with ${\sim}150$ X-ray counts. One of the dominant sources of uncertainty on the ICM density profile estimated with a standard X-ray analysis with such shallow X-ray data is due to the systematic uncertainty associated with the ICM temperature obtained through the analysis of the background-dominated X-ray spectrum. We show that we can decrease the uncertainty on the density profile by a factor ${\sim}5$ with a joint deprojection of the X-ray surface brightness profile measured by $Chandra$ and the SZ integrated Compton parameter available in the SPT cluster catalog. We apply this technique to the whole sample of 67 clusters in order to track the evolution of the ICM core density during cluster growth. We confirm that the evolution of the gas density profile is well modeled by the combination of a fixed core and a self-similarly evolving non-cool core profile. We show that the fraction of cool-cores in this sample is remarkably stable with redshift although clusters have gained a factor ${\sim}4$ in total mass over the past ${\sim}9$ Gyr. This new sample combined with our new X-ray/SZ analysis procedure and extensive multi-wavelength data will allow us to address fundamental shortcomings in our current understanding of cluster formation and evolution at $z > 1$. 2022-04-28T14:34:53Z 2022-04-28T14:34:53Z 2021 2022-04-28T14:22:18Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142177 Ruppin, F, McDonald, M, Bleem, LE, Allen, SW, Benson, BA et al. 2021. "Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr." Astrophysical Journal, 918 (2). en 10.3847/1538-4357/AC0BBA Astrophysical Journal 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. application/pdf American Astronomical Society American Astronomical Society |
| spellingShingle | Ruppin, F McDonald, M Bleem, LE Allen, SW Benson, BA Calzadilla, M Khullar, G Floyd, B Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title | Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title_full | Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title_fullStr | Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title_full_unstemmed | Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title_short | Stability of Cool Cores during Galaxy Cluster Growth: A Joint Chandra/SPT Analysis of 67 Galaxy Clusters along a Common Evolutionary Track Spanning 9 Gyr |
| title_sort | stability of cool cores during galaxy cluster growth a joint chandra spt analysis of 67 galaxy clusters along a common evolutionary track spanning 9 gyr |
| url | https://hdl.handle.net/1721.1/142177 |
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