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The rise and fall of star formation in z ~ 0.2 merging galaxy clusters

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The rise and fall of star formation in z ~ 0.2 merging galaxy clusters. / Stroe, Andra; Sobral, David; Dawson, William; James Jee, M.; Hoekstra, Henk; Wittman, David; van Weeren, Reinout J.; Brüggen, Marcus; Röttgering, Huub J. A.

In: Monthly Notices of the Royal Astronomical Society, Vol. 450, No. 1, 11.06.2015, p. 646-665.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Stroe, A, Sobral, D, Dawson, W, James Jee, M, Hoekstra, H, Wittman, D, van Weeren, RJ, Brüggen, M & Röttgering, HJA 2015, 'The rise and fall of star formation in z ~ 0.2 merging galaxy clusters', Monthly Notices of the Royal Astronomical Society, vol. 450, no. 1, pp. 646-665. https://doi.org/10.1093/mnras/stu2519

APA

Stroe, A., Sobral, D., Dawson, W., James Jee, M., Hoekstra, H., Wittman, D., van Weeren, R. J., Brüggen, M., & Röttgering, H. J. A. (2015). The rise and fall of star formation in z ~ 0.2 merging galaxy clusters. Monthly Notices of the Royal Astronomical Society, 450(1), 646-665. https://doi.org/10.1093/mnras/stu2519

Vancouver

Stroe A, Sobral D, Dawson W, James Jee M, Hoekstra H, Wittman D et al. The rise and fall of star formation in z ~ 0.2 merging galaxy clusters. Monthly Notices of the Royal Astronomical Society. 2015 Jun 11;450(1):646-665. https://doi.org/10.1093/mnras/stu2519

Author

Stroe, Andra ; Sobral, David ; Dawson, William ; James Jee, M. ; Hoekstra, Henk ; Wittman, David ; van Weeren, Reinout J. ; Brüggen, Marcus ; Röttgering, Huub J. A. / The rise and fall of star formation in z ~ 0.2 merging galaxy clusters. In: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 450, No. 1. pp. 646-665.

Bibtex

@article{a4096856041e4b36b156b271d3024c96,
title = "The rise and fall of star formation in z ~ 0.2 merging galaxy clusters",
abstract = "CIZA J2242.8+5301 ('Sausage') and 1RXS J0603.3+4213 ('Toothbrush') are two lowredshift (z ~ 0.2), massive (~2 × 1015M·), post-core passage merging clusters, which host-shock waves traced by diffuse radio emission. To study their star formation properties, we uniformly survey the 'Sausage' and 'Toothbrush' clusters in broad- and narrow-band filters and select a sample of 201 and 463 line emitters, down to a rest-frame equivalent width (13 {\AA}). We robustly separate between Hα and higher redshift emitters using a combination of optical multiband (B, g, V, r, i, z) and spectroscopic data. We build Hα luminosity functions for the entire cluster region, near the shock fronts, and away from the shock fronts and find striking differences between the two clusters. In the dynamically younger, 1 Gyr old 'Sausage' cluster we find numerous (59) Hα emitters above a star formation rate (SFR) of 0.17 M· yr-1 surprisingly located in close proximity to the shock fronts, embedded in very hot intracluster medium plasma. The SFR density for the cluster population is at least at the level of typical galaxies at z ~2. Down to the same SFR, the possibly dynamically more evolved 'Toothbrush' cluster has only nine Hα galaxies. The cluster Hα galaxies fall on the SFR-stellarmass relation z ~ 0.2 for the field. However, the 'Sausage' cluster has an Hαa emitter density >20 times that of blank fields. If the shock passes through gas-rich cluster galaxies, the compressed gas could collapse into dense clouds and excite star formation for a few 100 Myr. This process ultimately leads to a rapid consumption of the molecular gas, accelerating the transformation of gas-rich field spirals into cluster S0s or ellipticals.",
keywords = "Cosmology: observations, Galaxies: clusters: individual: 1RXS J0603.3+4213, Galaxies: clusters: individual: CIZA J2242.8+5301, Galaxies: evolution, Large-scale structure of Universe, Shock waves",
author = "Andra Stroe and David Sobral and William Dawson and {James Jee}, M. and Henk Hoekstra and David Wittman and {van Weeren}, {Reinout J.} and Marcus Br{\"u}ggen and R{\"o}ttgering, {Huub J. A.}",
year = "2015",
month = jun,
day = "11",
doi = "10.1093/mnras/stu2519",
language = "English",
volume = "450",
pages = "646--665",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "1",

}

RIS

TY - JOUR

T1 - The rise and fall of star formation in z ~ 0.2 merging galaxy clusters

AU - Stroe, Andra

AU - Sobral, David

AU - Dawson, William

AU - James Jee, M.

AU - Hoekstra, Henk

AU - Wittman, David

AU - van Weeren, Reinout J.

AU - Brüggen, Marcus

AU - Röttgering, Huub J. A.

PY - 2015/6/11

Y1 - 2015/6/11

N2 - CIZA J2242.8+5301 ('Sausage') and 1RXS J0603.3+4213 ('Toothbrush') are two lowredshift (z ~ 0.2), massive (~2 × 1015M·), post-core passage merging clusters, which host-shock waves traced by diffuse radio emission. To study their star formation properties, we uniformly survey the 'Sausage' and 'Toothbrush' clusters in broad- and narrow-band filters and select a sample of 201 and 463 line emitters, down to a rest-frame equivalent width (13 Å). We robustly separate between Hα and higher redshift emitters using a combination of optical multiband (B, g, V, r, i, z) and spectroscopic data. We build Hα luminosity functions for the entire cluster region, near the shock fronts, and away from the shock fronts and find striking differences between the two clusters. In the dynamically younger, 1 Gyr old 'Sausage' cluster we find numerous (59) Hα emitters above a star formation rate (SFR) of 0.17 M· yr-1 surprisingly located in close proximity to the shock fronts, embedded in very hot intracluster medium plasma. The SFR density for the cluster population is at least at the level of typical galaxies at z ~2. Down to the same SFR, the possibly dynamically more evolved 'Toothbrush' cluster has only nine Hα galaxies. The cluster Hα galaxies fall on the SFR-stellarmass relation z ~ 0.2 for the field. However, the 'Sausage' cluster has an Hαa emitter density >20 times that of blank fields. If the shock passes through gas-rich cluster galaxies, the compressed gas could collapse into dense clouds and excite star formation for a few 100 Myr. This process ultimately leads to a rapid consumption of the molecular gas, accelerating the transformation of gas-rich field spirals into cluster S0s or ellipticals.

AB - CIZA J2242.8+5301 ('Sausage') and 1RXS J0603.3+4213 ('Toothbrush') are two lowredshift (z ~ 0.2), massive (~2 × 1015M·), post-core passage merging clusters, which host-shock waves traced by diffuse radio emission. To study their star formation properties, we uniformly survey the 'Sausage' and 'Toothbrush' clusters in broad- and narrow-band filters and select a sample of 201 and 463 line emitters, down to a rest-frame equivalent width (13 Å). We robustly separate between Hα and higher redshift emitters using a combination of optical multiband (B, g, V, r, i, z) and spectroscopic data. We build Hα luminosity functions for the entire cluster region, near the shock fronts, and away from the shock fronts and find striking differences between the two clusters. In the dynamically younger, 1 Gyr old 'Sausage' cluster we find numerous (59) Hα emitters above a star formation rate (SFR) of 0.17 M· yr-1 surprisingly located in close proximity to the shock fronts, embedded in very hot intracluster medium plasma. The SFR density for the cluster population is at least at the level of typical galaxies at z ~2. Down to the same SFR, the possibly dynamically more evolved 'Toothbrush' cluster has only nine Hα galaxies. The cluster Hα galaxies fall on the SFR-stellarmass relation z ~ 0.2 for the field. However, the 'Sausage' cluster has an Hαa emitter density >20 times that of blank fields. If the shock passes through gas-rich cluster galaxies, the compressed gas could collapse into dense clouds and excite star formation for a few 100 Myr. This process ultimately leads to a rapid consumption of the molecular gas, accelerating the transformation of gas-rich field spirals into cluster S0s or ellipticals.

KW - Cosmology: observations

KW - Galaxies: clusters: individual: 1RXS J0603.3+4213

KW - Galaxies: clusters: individual: CIZA J2242.8+5301

KW - Galaxies: evolution

KW - Large-scale structure of Universe

KW - Shock waves

U2 - 10.1093/mnras/stu2519

DO - 10.1093/mnras/stu2519

M3 - Journal article

AN - SCOPUS:84929783369

VL - 450

SP - 646

EP - 665

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -