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HST/WFC3 grism observations of z ~ 1 clusters : evidence for rapid outside-in environmental quenching from spatially resolved H alpha maps

Jasleen Matharu, Adam Muzzin, Gabriel B. Brammer, Erica J. Nelson, Matthew W. Auger, Paul C. Hewett, Remco van der Burg, Michael Balogh, Ricardo Demarco, Danilo Marchesini, et al.
(2021) ASTROPHYSICAL JOURNAL. 923(2).
Author
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Abstract
We present and publicly release (www.gclasshst.com ) the first spatially resolved Ha maps of star-forming cluster galaxies at z similar to 1, made possible with the Wide Field Camera 3 (WFC3) G141 grism on the Hubble Space Telescope (HST). Using a similar but updated method to 3D-HST in the field environment, we stack the Ha maps in bins of stellar mass, measure the half-light radius of the H alpha distribution, and compare it to the stellar continuum. The ratio of the H alpha to stellar continuum half-light radius, R[H alpha/C] = R-eff,R-H alpha/R-eff,R-Cont is smaller in the clusters by Ref, cove (6 +/- 9)%, but statistically consistent within la uncertainties. A negligible difference in R[H alpha/C] with environment is surprising, given the higher quenched fractions in the clusters relative to the field. We postulate that the combination of high quenched fractions and no change in R[H alpha/C] with environment can be reconciled if environmental quenching proceeds rapidly. We investigate this hypothesis by performing similar analysis on the spectroscopically confirmed, recently quenched cluster galaxies. 87% have Ha detections, with star formation rates 8 +/- 1 times lower than star-forming cluster galaxies of similar stellar mass. Importantly, these galaxies have an R [Ha/C] that is (81 +/- 8)% smaller than coeval star-forming field galaxies at fixed stellar mass. This suggests the environmental quenching process occurred outside-in. We conclude that disk truncation due to ram pressure stripping is occurring in cluster galaxies at z similar to 1, but more rapidly and/or efficiently than in z less than or similar to 0.5 clusters, such that the effects on R[H alpha/C] become observable just after the cluster galaxy has recently quenched.
Keywords
2007, 594, 2029, 1569, 621, 584, 2040, 1594, 2176, 424, Astrophysics - Astrophysics of Galaxies, GALAXY REDSHIFT SURVEY, STAR-FORMATION RATES, MORPHOLOGY-DENSITY RELATION, PRESSURE STRIPPING EVENTS, RAM-PRESSURE, SPECTROSCOPIC CONFIRMATION, STELLAR POPULATION, FORMATION HISTORIES, PHYSICAL-PROPERTIES, RADIAL-DISTRIBUTION

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MLA
Matharu, Jasleen, et al. “HST/WFC3 Grism Observations of z ~ 1 Clusters : Evidence for Rapid Outside-in Environmental Quenching from Spatially Resolved H Alpha Maps.” ASTROPHYSICAL JOURNAL, vol. 923, no. 2, 2021, doi:10.3847/1538-4357/ac26c3.
APA
Matharu, J., Muzzin, A., Brammer, G. B., Nelson, E. J., Auger, M. W., Hewett, P. C., … Yee, H. K. ~C. (2021). HST/WFC3 grism observations of z ~ 1 clusters : evidence for rapid outside-in environmental quenching from spatially resolved H alpha maps. ASTROPHYSICAL JOURNAL, 923(2). https://doi.org/10.3847/1538-4357/ac26c3
Chicago author-date
Matharu, Jasleen, Adam Muzzin, Gabriel B. Brammer, Erica J. Nelson, Matthew W. Auger, Paul C. Hewett, Remco van der Burg, et al. 2021. “HST/WFC3 Grism Observations of z ~ 1 Clusters : Evidence for Rapid Outside-in Environmental Quenching from Spatially Resolved H Alpha Maps.” ASTROPHYSICAL JOURNAL 923 (2). https://doi.org/10.3847/1538-4357/ac26c3.
Chicago author-date (all authors)
Matharu, Jasleen, Adam Muzzin, Gabriel B. Brammer, Erica J. Nelson, Matthew W. Auger, Paul C. Hewett, Remco van der Burg, Michael Balogh, Ricardo Demarco, Danilo Marchesini, Allison G. Noble, Gregory Rudnick, Arjen van der Wel, Gillian Wilson, and Howard K.~C. Yee. 2021. “HST/WFC3 Grism Observations of z ~ 1 Clusters : Evidence for Rapid Outside-in Environmental Quenching from Spatially Resolved H Alpha Maps.” ASTROPHYSICAL JOURNAL 923 (2). doi:10.3847/1538-4357/ac26c3.
Vancouver
1.
Matharu J, Muzzin A, Brammer GB, Nelson EJ, Auger MW, Hewett PC, et al. HST/WFC3 grism observations of z ~ 1 clusters : evidence for rapid outside-in environmental quenching from spatially resolved H alpha maps. ASTROPHYSICAL JOURNAL. 2021;923(2).
IEEE
[1]
J. Matharu et al., “HST/WFC3 grism observations of z ~ 1 clusters : evidence for rapid outside-in environmental quenching from spatially resolved H alpha maps,” ASTROPHYSICAL JOURNAL, vol. 923, no. 2, 2021.
@article{8747458,
  abstract     = {{We present and publicly release (www.gclasshst.com ) the first spatially resolved Ha maps of star-forming cluster galaxies at z similar to 1, made possible with the Wide Field Camera 3 (WFC3) G141 grism on the Hubble Space Telescope (HST). Using a similar but updated method to 3D-HST in the field environment, we stack the Ha maps in bins of stellar mass, measure the half-light radius of the H alpha distribution, and compare it to the stellar continuum. The ratio of the H alpha to stellar continuum half-light radius, R[H alpha/C] = R-eff,R-H alpha/R-eff,R-Cont is smaller in the clusters by Ref, cove (6 +/- 9)%, but statistically consistent within la uncertainties. A negligible difference in R[H alpha/C] with environment is surprising, given the higher quenched fractions in the clusters relative to the field. We postulate that the combination of high quenched fractions and no change in R[H alpha/C] with environment can be reconciled if environmental quenching proceeds rapidly. We investigate this hypothesis by performing similar analysis on the spectroscopically confirmed, recently quenched cluster galaxies. 87% have Ha detections, with star formation rates 8 +/- 1 times lower than star-forming cluster galaxies of similar stellar mass. Importantly, these galaxies have an R [Ha/C] that is (81 +/- 8)% smaller than coeval star-forming field galaxies at fixed stellar mass. This suggests the environmental quenching process occurred outside-in. We conclude that disk truncation due to ram pressure stripping is occurring in cluster galaxies at z similar to 1, but more rapidly and/or efficiently than in z less than or similar to 0.5 clusters, such that the effects on R[H alpha/C] become observable just after the cluster galaxy has recently quenched.}},
  articleno    = {{222}},
  author       = {{Matharu, Jasleen and Muzzin, Adam and Brammer, Gabriel B. and Nelson, Erica J. and Auger, Matthew W. and Hewett, Paul C. and van der Burg, Remco and Balogh, Michael and Demarco, Ricardo and Marchesini, Danilo and Noble, Allison G. and Rudnick, Gregory and van der Wel, Arjen and Wilson, Gillian and Yee, Howard K.~C.}},
  issn         = {{0004-637X}},
  journal      = {{ASTROPHYSICAL JOURNAL}},
  keywords     = {{2007,594,2029,1569,621,584,2040,1594,2176,424,Astrophysics - Astrophysics of Galaxies,GALAXY REDSHIFT SURVEY,STAR-FORMATION RATES,MORPHOLOGY-DENSITY RELATION,PRESSURE STRIPPING EVENTS,RAM-PRESSURE,SPECTROSCOPIC CONFIRMATION,STELLAR POPULATION,FORMATION HISTORIES,PHYSICAL-PROPERTIES,RADIAL-DISTRIBUTION}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{16}},
  title        = {{HST/WFC3 grism observations of z ~ 1 clusters : evidence for rapid outside-in environmental quenching from spatially resolved H alpha maps}},
  url          = {{http://doi.org/10.3847/1538-4357/ac26c3}},
  volume       = {{923}},
  year         = {{2021}},
}
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