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The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2: 'sausage' and 'toothbrush' clusters

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The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2 : 'sausage' and 'toothbrush' clusters. / Stroe, Andra; Sobral, David; Röttgering, Huub J. A.; van Weeren, Reinout J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 438, No. 2, stt2286, 21.02.2014, p. 1377-1390.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Stroe, A, Sobral, D, Röttgering, HJA & van Weeren, RJ 2014, 'The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2: 'sausage' and 'toothbrush' clusters', Monthly Notices of the Royal Astronomical Society, vol. 438, no. 2, stt2286, pp. 1377-1390. https://doi.org/10.1093/mnras/stt2286

APA

Stroe, A., Sobral, D., Röttgering, H. J. A., & van Weeren, R. J. (2014). The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2: 'sausage' and 'toothbrush' clusters. Monthly Notices of the Royal Astronomical Society, 438(2), 1377-1390. [stt2286]. https://doi.org/10.1093/mnras/stt2286

Vancouver

Stroe A, Sobral D, Röttgering HJA, van Weeren RJ. The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2: 'sausage' and 'toothbrush' clusters. Monthly Notices of the Royal Astronomical Society. 2014 Feb 21;438(2):1377-1390. stt2286. https://doi.org/10.1093/mnras/stt2286

Author

Stroe, Andra ; Sobral, David ; Röttgering, Huub J. A. ; van Weeren, Reinout J. / The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2 : 'sausage' and 'toothbrush' clusters. In: Monthly Notices of the Royal Astronomical Society. 2014 ; Vol. 438, No. 2. pp. 1377-1390.

Bibtex

@article{b4e2a360fc6d475dad312077ccfe9c6b,
title = "The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2: 'sausage' and 'toothbrush' clusters",
abstract = "Themost extreme clustermergers can lead to massive cluster-wide travelling shockwaves. The CIZA J2242.8+5301 ('sausage') and 1RXS J0603.3+4213 ('toothbrush') clusters (z ~ 0.2) host enormous radio-emitting shocks with simple geometry. We investigate the role of mergers and shocks in shaping the Ha luminosity function, using custom-made narrow-band filters matching the cluster redshifts mounted on the Isaac Newton Telescope. We surveyed ~0.28 deg2 for each cluster and found 181 line emitters in the 'sausage' (volume of 3.371 × 103 Mpc3 for Hα at z = 0.1945) and 141 in the 'toothbrush' (4.546 × 103 Mpc3 for Hα at z = 0.225), out of which 49 ('sausage') and 30 ('toothbrush') are expected to be Hα. We build luminosity functions for the field-of-view down to an average limiting star formation rate of 0.14M⊙ yr-1, find good agreement with field luminosity functions at z = 0.2, but significant differences between the shapes of the luminosity functions for the two clusters. We discover extended, tens-of-kpc-wide Hα haloes in galaxies neighbouring relics, which were possibly disrupted by the passage of the shock wave. By comparing the 'sausage' cluster with blank fields and other clusters, we also uncover an order of magnitude boost (at 9σ level) in the normalization f φ* of the luminosity function in the relic areas. Our results suggest that cluster mergers may play an important role in the evolution of cluster galaxies through shock-induced star formation.",
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 R{\"o}ttgering, {Huub J. A.} and {van Weeren}, {Reinout J.}",
year = "2014",
month = feb,
day = "21",
doi = "10.1093/mnras/stt2286",
language = "English",
volume = "438",
pages = "1377--1390",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - The role of cluster mergers and travelling shocks in shaping the Hα luminosity function at z ~ 0.2

T2 - 'sausage' and 'toothbrush' clusters

AU - Stroe, Andra

AU - Sobral, David

AU - Röttgering, Huub J. A.

AU - van Weeren, Reinout J.

PY - 2014/2/21

Y1 - 2014/2/21

N2 - Themost extreme clustermergers can lead to massive cluster-wide travelling shockwaves. The CIZA J2242.8+5301 ('sausage') and 1RXS J0603.3+4213 ('toothbrush') clusters (z ~ 0.2) host enormous radio-emitting shocks with simple geometry. We investigate the role of mergers and shocks in shaping the Ha luminosity function, using custom-made narrow-band filters matching the cluster redshifts mounted on the Isaac Newton Telescope. We surveyed ~0.28 deg2 for each cluster and found 181 line emitters in the 'sausage' (volume of 3.371 × 103 Mpc3 for Hα at z = 0.1945) and 141 in the 'toothbrush' (4.546 × 103 Mpc3 for Hα at z = 0.225), out of which 49 ('sausage') and 30 ('toothbrush') are expected to be Hα. We build luminosity functions for the field-of-view down to an average limiting star formation rate of 0.14M⊙ yr-1, find good agreement with field luminosity functions at z = 0.2, but significant differences between the shapes of the luminosity functions for the two clusters. We discover extended, tens-of-kpc-wide Hα haloes in galaxies neighbouring relics, which were possibly disrupted by the passage of the shock wave. By comparing the 'sausage' cluster with blank fields and other clusters, we also uncover an order of magnitude boost (at 9σ level) in the normalization f φ* of the luminosity function in the relic areas. Our results suggest that cluster mergers may play an important role in the evolution of cluster galaxies through shock-induced star formation.

AB - Themost extreme clustermergers can lead to massive cluster-wide travelling shockwaves. The CIZA J2242.8+5301 ('sausage') and 1RXS J0603.3+4213 ('toothbrush') clusters (z ~ 0.2) host enormous radio-emitting shocks with simple geometry. We investigate the role of mergers and shocks in shaping the Ha luminosity function, using custom-made narrow-band filters matching the cluster redshifts mounted on the Isaac Newton Telescope. We surveyed ~0.28 deg2 for each cluster and found 181 line emitters in the 'sausage' (volume of 3.371 × 103 Mpc3 for Hα at z = 0.1945) and 141 in the 'toothbrush' (4.546 × 103 Mpc3 for Hα at z = 0.225), out of which 49 ('sausage') and 30 ('toothbrush') are expected to be Hα. We build luminosity functions for the field-of-view down to an average limiting star formation rate of 0.14M⊙ yr-1, find good agreement with field luminosity functions at z = 0.2, but significant differences between the shapes of the luminosity functions for the two clusters. We discover extended, tens-of-kpc-wide Hα haloes in galaxies neighbouring relics, which were possibly disrupted by the passage of the shock wave. By comparing the 'sausage' cluster with blank fields and other clusters, we also uncover an order of magnitude boost (at 9σ level) in the normalization f φ* of the luminosity function in the relic areas. Our results suggest that cluster mergers may play an important role in the evolution of cluster galaxies through shock-induced star formation.

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/stt2286

DO - 10.1093/mnras/stt2286

M3 - Journal article

AN - SCOPUS:84893348191

VL - 438

SP - 1377

EP - 1390

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

M1 - stt2286

ER -