Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8
The intracluster light (ICL) fraction is a well-known indicator of the dynamical activity in intermediate-redshift clusters. Merging clusters in the redshift interval 0.18 < z < 0.56 have a distinctive peak in the ICL fractions measured between ∼3800 and 4800 Å . In this work, we analyze two h...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2024-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/ad181a |
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| author | Yolanda Jiménez-Teja Renato A. Dupke Paulo A. A. Lopes Paola Dimauro |
| author_facet | Yolanda Jiménez-Teja Renato A. Dupke Paulo A. A. Lopes Paola Dimauro |
| author_sort | Yolanda Jiménez-Teja |
| collection | DOAJ |
| description | The intracluster light (ICL) fraction is a well-known indicator of the dynamical activity in intermediate-redshift clusters. Merging clusters in the redshift interval 0.18 < z < 0.56 have a distinctive peak in the ICL fractions measured between ∼3800 and 4800 Å . In this work, we analyze two higher-redshift, clearly merging clusters, ACT-CLJ0102-49151 and CL J0152.7-1357, at z > 0.8, using the Hubble Space Telescope optical and infrared images obtained by the RELICS survey. We report the presence of a similar peak in the ICL fractions, although wider and redshifted to the wavelength interval ∼5200–7300 Å. The fact that this excess in the ICL fractions is found at longer wavelengths can be explained by an assorted mixture of stellar populations in the ICL, direct inheritance of an ICL that was mainly formed by major galaxy mergers with the BCG at z > 1 and experienced an instantaneous burst due to the merging event. The ubiquity of the ICL fraction merging signature across cosmic time enhances the ICL as a highly reliable and powerful probe to determine the dynamical stage of galaxy clusters, which is crucial for cluster-based cosmological inferences that require relaxation of the sample. |
| first_indexed | 2024-03-08T16:37:15Z |
| format | Article |
| id | doaj.art-77e882d096304300a71ec608919b1f64 |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-08T16:37:15Z |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj.art-77e882d096304300a71ec608919b1f642024-01-05T14:57:11ZengIOP PublishingThe Astrophysical Journal Letters2041-82052024-01-019602L710.3847/2041-8213/ad181aEvidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8Yolanda Jiménez-Teja0https://orcid.org/0000-0002-6090-2853Renato A. Dupke1Paulo A. A. Lopes2https://orcid.org/0000-0003-2540-7424Paola Dimauro3https://orcid.org/0000-0001-7399-2854Instituto de Astrofísica de Andalucía–CSIC , Glorieta de la Astronomía s/n, E-18008 Granada, Spain ; yojite@iaa.es; Observatório Nacional , Rua General José Cristino, 77–Bairro Imperial de São Cristóvão, Rio de Janeiro, 20921-400, BrazilObservatório Nacional , Rua General José Cristino, 77–Bairro Imperial de São Cristóvão, Rio de Janeiro, 20921-400, Brazil; Department of Astronomy, University of Michigan , 311 West Hall, 1085 South University Avenue, Ann Arbor, MI 48109-1107, USA; Eureka Scientific , 2452 Delmer St. Suite 100, Oakland, CA 94602, USAObservatório do Valongo , Universidade Federal do Rio de Janeiro, Ladeira do Pedro Antônio 43, Rio de Janeiro RJ 20080-090, BrazilINAF–Osservatorio Astronomico di Roma , Via di Frascati 33, I-00078 Monte Porzio Catone, ItalyThe intracluster light (ICL) fraction is a well-known indicator of the dynamical activity in intermediate-redshift clusters. Merging clusters in the redshift interval 0.18 < z < 0.56 have a distinctive peak in the ICL fractions measured between ∼3800 and 4800 Å . In this work, we analyze two higher-redshift, clearly merging clusters, ACT-CLJ0102-49151 and CL J0152.7-1357, at z > 0.8, using the Hubble Space Telescope optical and infrared images obtained by the RELICS survey. We report the presence of a similar peak in the ICL fractions, although wider and redshifted to the wavelength interval ∼5200–7300 Å. The fact that this excess in the ICL fractions is found at longer wavelengths can be explained by an assorted mixture of stellar populations in the ICL, direct inheritance of an ICL that was mainly formed by major galaxy mergers with the BCG at z > 1 and experienced an instantaneous burst due to the merging event. The ubiquity of the ICL fraction merging signature across cosmic time enhances the ICL as a highly reliable and powerful probe to determine the dynamical stage of galaxy clusters, which is crucial for cluster-based cosmological inferences that require relaxation of the sample.https://doi.org/10.3847/2041-8213/ad181aGalaxy clustersHigh-redshift galaxy clustersGalaxy mergers |
| spellingShingle | Yolanda Jiménez-Teja Renato A. Dupke Paulo A. A. Lopes Paola Dimauro Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 The Astrophysical Journal Letters Galaxy clusters High-redshift galaxy clusters Galaxy mergers |
| title | Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 |
| title_full | Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 |
| title_fullStr | Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 |
| title_full_unstemmed | Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 |
| title_short | Evidence for a Redshifted Excess in the Intracluster Light Fractions of Merging Clusters at z ∼ 0.8 |
| title_sort | evidence for a redshifted excess in the intracluster light fractions of merging clusters at z ∼ 0 8 |
| topic | Galaxy clusters High-redshift galaxy clusters Galaxy mergers |
| url | https://doi.org/10.3847/2041-8213/ad181a |
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