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### Electronic data

• 1708.00454v1

Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/1538-4357/aa8368

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## The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$

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### Standard

The KMOS Cluster Survey (KCS) I : The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$. / Beifiori, Alessandra; Mendel, J. Trevor; Chan, Jeffrey C. C.; Saglia, Roberto P.; Bender, Ralf; Cappellari, Michele; Davies, Roger L.; Galametz, Audrey; Houghton, Ryan C. W.; Prichard, Laura J.; Smith, Russel; Stott, John P.; Wilman, David J.; Lewis, Ian J.; Sharples, Ray; Wegner, Michael.

In: The Astrophysical Journal, Vol. 846, No. 2, 120, 10.09.2017.

Research output: Contribution to journalJournal articlepeer-review

### Harvard

Beifiori, A, Mendel, JT, Chan, JCC, Saglia, RP, Bender, R, Cappellari, M, Davies, RL, Galametz, A, Houghton, RCW, Prichard, LJ, Smith, R, Stott, JP, Wilman, DJ, Lewis, IJ, Sharples, R & Wegner, M 2017, 'The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$', The Astrophysical Journal, vol. 846, no. 2, 120. https://doi.org/10.3847/1538-4357/aa8368

### APA

Beifiori, A., Mendel, J. T., Chan, J. C. C., Saglia, R. P., Bender, R., Cappellari, M., Davies, R. L., Galametz, A., Houghton, R. C. W., Prichard, L. J., Smith, R., Stott, J. P., Wilman, D. J., Lewis, I. J., Sharples, R., & Wegner, M. (2017). The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$. The Astrophysical Journal, 846(2), [120]. https://doi.org/10.3847/1538-4357/aa8368

### Vancouver

Beifiori A, Mendel JT, Chan JCC, Saglia RP, Bender R, Cappellari M et al. The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$. The Astrophysical Journal. 2017 Sep 10;846(2). 120. https://doi.org/10.3847/1538-4357/aa8368

### Author

Beifiori, Alessandra ; Mendel, J. Trevor ; Chan, Jeffrey C. C. ; Saglia, Roberto P. ; Bender, Ralf ; Cappellari, Michele ; Davies, Roger L. ; Galametz, Audrey ; Houghton, Ryan C. W. ; Prichard, Laura J. ; Smith, Russel ; Stott, John P. ; Wilman, David J. ; Lewis, Ian J. ; Sharples, Ray ; Wegner, Michael. / The KMOS Cluster Survey (KCS) I : The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$. In: The Astrophysical Journal. 2017 ; Vol. 846, No. 2.

### Bibtex

@article{8ac8ea303b134d848399c019897d4d36,
title = "The KMOS Cluster Survey (KCS) I: The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$",
abstract = "We present the analysis of the fundamental plane (FP) for a sample of 19 massive red-sequence galaxies ($M_{\star} >4\times10^{10} M_{\odot}$) in 3 known overdensities at $1.39z 11$) in our sample, we translate the FP zero-point evolution into a mass-to-light-ratio $M/L$ evolution finding $\Delta \log M/L_{B}=(-0.46\pm0.10)z$, $\Delta \log M/L_{B}=(-0.52\pm0.07)z$, to $\Delta \log M/L_{B}=(-0.55\pm0.10)z$, respectively. We assess the potential contribution of the galaxies structural and stellar velocity dispersion evolution to the evolution of the FP zero-point and find it to be $\sim$6-35 % of the FP zero-point evolution. The rate of $M/L$ evolution is consistent with galaxies evolving passively. By using single stellar population models, we find an average age of $2.33^{+0.86}_{-0.51}$ Gyr for the $\log M_{\star}/M_{\odot}>11$ galaxies in our massive and virialized cluster at $z=1.39$, $1.59^{+1.40}_{-0.62}$ Gyr in a massive but not virialized cluster at $z=1.46$, and $1.20^{+1.03}_{-0.47}$ Gyr in a protocluster at $z=1.61$. After accounting for the difference in the age of the Universe between redshifts, the ages of the galaxies in the three overdensities are consistent within the errors, with possibly a weak suggestion that galaxies in the most evolved structure are older.",
keywords = "galaxies: clusters: general, galaxies: elliptical and lenticular, cD, galaxies: evolution, galaxies: formation, galaxies: high-redshift, galaxies: kinematics and dynamics",
author = "Alessandra Beifiori and Mendel, {J. Trevor} and Chan, {Jeffrey C. C.} and Saglia, {Roberto P.} and Ralf Bender and Michele Cappellari and Davies, {Roger L.} and Audrey Galametz and Houghton, {Ryan C. W.} and Prichard, {Laura J.} and Russel Smith and Stott, {John P.} and Wilman, {David J.} and Lewis, {Ian J.} and Ray Sharples and Michael Wegner",
note = "This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/1538-4357/aa8368",
year = "2017",
month = sep,
day = "10",
doi = "10.3847/1538-4357/aa8368",
language = "English",
volume = "846",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

### RIS

TY - JOUR

T1 - The KMOS Cluster Survey (KCS) I

T2 - The fundamental plane and the formation ages of cluster galaxies at redshift $1.4z1.6$

AU - Beifiori, Alessandra

AU - Mendel, J. Trevor

AU - Chan, Jeffrey C. C.

AU - Saglia, Roberto P.

AU - Bender, Ralf

AU - Cappellari, Michele

AU - Davies, Roger L.

AU - Galametz, Audrey

AU - Houghton, Ryan C. W.

AU - Prichard, Laura J.

AU - Smith, Russel

AU - Stott, John P.

AU - Wilman, David J.

AU - Lewis, Ian J.

AU - Sharples, Ray

AU - Wegner, Michael

N1 - This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/1538-4357/aa8368

PY - 2017/9/10

Y1 - 2017/9/10

N2 - We present the analysis of the fundamental plane (FP) for a sample of 19 massive red-sequence galaxies ($M_{\star} >4\times10^{10} M_{\odot}$) in 3 known overdensities at $1.39z 11$) in our sample, we translate the FP zero-point evolution into a mass-to-light-ratio $M/L$ evolution finding $\Delta \log M/L_{B}=(-0.46\pm0.10)z$, $\Delta \log M/L_{B}=(-0.52\pm0.07)z$, to $\Delta \log M/L_{B}=(-0.55\pm0.10)z$, respectively. We assess the potential contribution of the galaxies structural and stellar velocity dispersion evolution to the evolution of the FP zero-point and find it to be $\sim$6-35 % of the FP zero-point evolution. The rate of $M/L$ evolution is consistent with galaxies evolving passively. By using single stellar population models, we find an average age of $2.33^{+0.86}_{-0.51}$ Gyr for the $\log M_{\star}/M_{\odot}>11$ galaxies in our massive and virialized cluster at $z=1.39$, $1.59^{+1.40}_{-0.62}$ Gyr in a massive but not virialized cluster at $z=1.46$, and $1.20^{+1.03}_{-0.47}$ Gyr in a protocluster at $z=1.61$. After accounting for the difference in the age of the Universe between redshifts, the ages of the galaxies in the three overdensities are consistent within the errors, with possibly a weak suggestion that galaxies in the most evolved structure are older.

AB - We present the analysis of the fundamental plane (FP) for a sample of 19 massive red-sequence galaxies ($M_{\star} >4\times10^{10} M_{\odot}$) in 3 known overdensities at $1.39z 11$) in our sample, we translate the FP zero-point evolution into a mass-to-light-ratio $M/L$ evolution finding $\Delta \log M/L_{B}=(-0.46\pm0.10)z$, $\Delta \log M/L_{B}=(-0.52\pm0.07)z$, to $\Delta \log M/L_{B}=(-0.55\pm0.10)z$, respectively. We assess the potential contribution of the galaxies structural and stellar velocity dispersion evolution to the evolution of the FP zero-point and find it to be $\sim$6-35 % of the FP zero-point evolution. The rate of $M/L$ evolution is consistent with galaxies evolving passively. By using single stellar population models, we find an average age of $2.33^{+0.86}_{-0.51}$ Gyr for the $\log M_{\star}/M_{\odot}>11$ galaxies in our massive and virialized cluster at $z=1.39$, $1.59^{+1.40}_{-0.62}$ Gyr in a massive but not virialized cluster at $z=1.46$, and $1.20^{+1.03}_{-0.47}$ Gyr in a protocluster at $z=1.61$. After accounting for the difference in the age of the Universe between redshifts, the ages of the galaxies in the three overdensities are consistent within the errors, with possibly a weak suggestion that galaxies in the most evolved structure are older.

KW - galaxies: clusters: general

KW - galaxies: elliptical and lenticular, cD

KW - galaxies: evolution

KW - galaxies: formation

KW - galaxies: high-redshift

KW - galaxies: kinematics and dynamics

U2 - 10.3847/1538-4357/aa8368

DO - 10.3847/1538-4357/aa8368

M3 - Journal article

VL - 846

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 120

ER -