The Era of Star Formation in Galaxy Clusters

Brodwin, M.; Stanford, S. A.; Gonzalez, Anthony H.; Zeimann, Gregory R.; Snyder, Gregory F.; Mancone, Conor L.; Pope, Alexandra; Eisenhardt, Peter; Stern, Daniel; Alberts, Stacey; Ashby, M. L. N.; Brown, M. J. I.; Chary, R.-R.; Dey, Arjun; Galametz, A.; Gettings, D.; Jannuzi, Buell T.; Miller, Eric D.; Moustakas, John; Moustakas, Leonidas A.

doi:10.1088/0004-637x/779/2/138

Cited by 202 publications

(322 citation statements)

References 122 publications

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“…This suggests a large fraction of quiescent galaxies and/or galaxies with low or dust-extincted SFRs as potential cluster members (see Section 5.2). Note the similarity with Brodwin et al (2013), albeit at lower redshift, who found that~40% of cluster members at < < z 1.37 1.50 are SF galaxies based on the Spitzer 24 μm emission, using an infrared-selected sample with stellar masses…”

Section: Irac Color-selection Efficiencysupporting

confidence: 73%

“…For example, based on a sample of 16 spectroscopically confirmed clusters at < < z 1 1 . 5 , Brodwin et al (2013) showed that at > z 1.3 the fraction of SF cluster members increases toward the cluster centers. These results suggest that the majority of star formation actually occurs in high-density environments at early epochs, implying that environmental-dependent quenching has not yet been established at > z 1.3.…”

Section: Introductionmentioning

confidence: 97%

“…These results suggest that the majority of star formation actually occurs in high-density environments at early epochs, implying that environmental-dependent quenching has not yet been established at > z 1.3. Brodwin et al (2013) predicted that this transition redshift should be a function of halo mass, with more massive halos transitioning earlier. This is consistent with the findings of Wylezalek et al (2014) of ã z 3 transition period for clusters around radio-loud active galactic nuclei (RLAGN), which are extreme objects that tend to reside in the most massive dark matter halos (e.g., Mandelbaum et al 2009;Hatch et al 2014;Orsi et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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HST GRISM CONFIRMATION OF TWO z ∼ 2 STRUCTURES FROM THE CLUSTERS AROUND RADIO-LOUD AGN (CARLA) SURVEY

Noirot

Vernet

Breuck

et al. 2016

ApJ

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Using Hubble Space Telescope slitless grism data, we report the spectroscopic confirmation of two distant structures atz 2 associated with powerful high-redshift radio-loud active galactic nuclei(AGNs). These rich structures, likely (forming) clusters, are among the most distant structures currently known, and were identified on the basis of Spitzer/IRAC [3.6]-[4.5] color. We spectroscopically confirm nine members in the field of MRC2036 −254, comprising eight star-forming galaxies and the targeted radio galaxy. The median redshift is z=2.000. We spectroscopically confirm 10 members in the field of B30756+406, comprising 8 star-forming galaxies and 2 AGNs, including the targeted radio-loud quasar. The median redshift is z=1.986. All confirmed members are within 500 kpc (1 arcmin) of the targeted AGNs. We derive median (mean) star-formation rates of based on mid-infrared fluxes and spectral energy distribution modeling. Most of our confirmed members are located above the star-forming mainsequence toward starburst galaxies, consistent with clusters at these early epochs being the sites of significant levels of star formation. The structure around MRC2036−254 shows an overdensity of IRAC-selected candidate galaxy cluster members consistent with being quiescent galaxies, while the structure around B30756+406 shows field values, albeit with many lower limits to colors that could allow an overdensity of faint red quiescent galaxies. The structure around MRC2036−254 shows a red sequence of passive galaxy candidates.

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Section: Irac Color-selection Efficiencysupporting

confidence: 73%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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HST GRISM CONFIRMATION OF TWO z ∼ 2 STRUCTURES FROM THE CLUSTERS AROUND RADIO-LOUD AGN (CARLA) SURVEY

Noirot

Vernet

Breuck

et al. 2016

ApJ

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“…This trend continues with increasing redshift, such that at z∼1.4, the SFR in the field and in the cluster environment are indistinguishable (Brodwin et al 2013;Alberts et al 2014;Wagner et al 2015, see also Figure 5). Thus, we would expect there to be a significantly higher fraction of gas-rich galaxies in our high-z subsample than in the low-z systems, particularly in the inner cores where gas depletion is most effective at low-z.…”

Section: An Evolving Fuel Supply?mentioning

confidence: 74%

STAR-FORMING BRIGHTEST CLUSTER GALAXIES AT 0.25 < z < 1.25: A TRANSITIONING FUEL SUPPLY

McDonald

Stalder

Bayliss

et al. 2016

ApJ

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We present a multiwavelength study of the 90 brightest cluster galaxies (BCGs) in a sample of galaxy clusters selected via the Sunyaev Zel'dovich effect by the South Pole Telescope, utilizing data from various ground-and space-based facilities. We infer the star-formation rate (SFR) for the BCG in each cluster-based on the UV and IR continuum luminosity, as well as the [O II]λλ3726,3729 emission line luminosity in cases where spectroscopy is available-and find seven systems with SFR > 100 M e yr −1 . We find that the BCG SFR exceeds 10 M e yr −1 in 31 of 90 (34%) cases at 0.25<z<1.25, compared to ∼1%-5% at z∼0 from the literature. At z1, this fraction increases to 92 31 6 -+ %, implying a steady decrease in the BCG SFR over the past ∼9 Gyr. At low-z, we find that the specific SFR in BCGs is declining more slowly with time than for field or cluster galaxies, which is most likely due to the replenishing fuel from the cooling ICM in relaxed, cool core clusters. At z0.6, the correlation between the cluster central entropy and BCG star formation-which is well established at z∼0-is not present. Instead, we find that the most star-forming BCGs at high-z are found in the cores of dynamically unrelaxed clusters. We use data from the Hubble Space Telescope to investigate the rest-frame near-UV morphology of a subsample of the most star-forming BCGs, and find complex, highly asymmetric UV morphologies on scales as large as ∼50-60 kpc. The high fraction of star-forming BCGs hosted in unrelaxed, non-cool core clusters at early times suggests that the dominant mode of fueling star formation in BCGs may have recently transitioned from galaxygalaxy interactions to ICM cooling.

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“…In addition, based upon measurements of the Hα emission from galaxies in the Snyder et al (2012) clusters, Zeimann et al (2013) infer unobscured SFRs of up to 200 M yr −1 for galaxies right down in the cluster cores. SFR measurements of the same clusters from Spitzer 24 µm observations, as well as Herschel SPIRE data, find similarly high SFRs, with the SFR in clusters increasing rapidly with redshift (Brodwin et al 2013;Alberts et al 2014).…”

Section: Trends In Galaxy Propertiesmentioning

confidence: 74%

The abundance and colours of galaxies in high-redshift clusters in the cold dark matter cosmology

Merson¹,

Baugh²,

González-Pérez³

et al. 2015

Mon. Not. R. Astron. Soc.

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High redshift galaxy clusters allow us to examine galaxy formation in extreme environments.Here we compile data for 15 z > 1 galaxy clusters to test the predictions from a state-of-theart semi-analytical model of galaxy formation. The model gives a good match to the slope and zero-point of the cluster red sequence. The model is able to match the cluster galaxy luminosity function at faint and bright magnitudes, but under-estimates the number of galaxies around the break in the cluster luminosity function. We find that simply assuming a weaker dust attenuation improves the model predictions for the cluster galaxy luminosity function, but worsens the predictions for the red sequence at bright magnitudes. Examination of the properties of the bright cluster galaxies suggests that the default dust attenuation is large due to these galaxies having large reservoirs of cold gas as well as small radii. We find that matching the luminosity function and colours of high redshift cluster galaxies, whilst remaining consistent with local observations, poses a challenge for galaxy formation models.

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The Era of Star Formation in Galaxy Clusters

Cited by 202 publications

References 122 publications

HST GRISM CONFIRMATION OF TWO z ∼ 2 STRUCTURES FROM THE CLUSTERS AROUND RADIO-LOUD AGN (CARLA) SURVEY

HST GRISM CONFIRMATION OF TWO z ∼ 2 STRUCTURES FROM THE CLUSTERS AROUND RADIO-LOUD AGN (CARLA) SURVEY

STAR-FORMING BRIGHTEST CLUSTER GALAXIES AT 0.25 < z < 1.25: A TRANSITIONING FUEL SUPPLY

The abundance and colours of galaxies in high-redshift clusters in the cold dark matter cosmology

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