TY - JOUR

T1 - K-CLASH: spatially resolving star-forming galaxies in field and cluster environments at z ≍ 0.2–0.6

AU - Tiley, Alfred L.

AU - Vaughan, Sam P.

AU - Stott, John P.

AU - Davies, Roger L.

AU - Prichard, Laura J.

AU - Bunker, Andrew

AU - Bureau, Martin

AU - Cappellari, Michele

AU - Jarvis, Matt

AU - Robotham, Aaron

AU - Cortese, Luca

AU - Bellstedt, Sabine

AU - Ansarinejad, Behzad

N1 - This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Alfred L Tiley, Sam P Vaughan, John P Stott, Roger L Davies, Laura J Prichard, Andrew Bunker, Martin Bureau, Michele Cappellari, Matt Jarvis, Aaron Robotham, Luca Cortese, Sabine Bellstedt, Behzad Ansarinejad, K-CLASH: spatially resolving star-forming galaxies in field and cluster environments at z ≈ 0.2–0.6, Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 1, July 2020, Pages 649–675, https://doi.org/10.1093/mnras/staa1418 is available online at: https://academic.oup.com/mnras/article/496/1/649/5841949

PY - 2020/7/1

Y1 - 2020/7/1

N2 - We present the KMOS-CLASH (K-CLASH) survey, a K-band Multi-Object Spectrograph (KMOS) survey, of the spatially resolved gas properties and kinematics of 191 (pre-dominantly blue) H α-detected galaxies at 0.2 ≲ z ≲ 0.6 in field and cluster environments. K-CLASH targets galaxies in four Cluster Lensing And Supernova survey with Hubble (CLASH) fields in the KMOS IZ-band, over 7 arcmin radius (≍2–3 Mpc) fields of view. K-CLASH aims to study the transition of star-forming galaxies from turbulent, highly star-forming disc-like and peculiar systems at z ≍ 1–3, to the comparatively quiescent, ordered late-type galaxies at z ≍ 0, and to examine the role of clusters in the build-up of the red sequence since z ≍ 1. In this paper, we describe the K-CLASH survey, present the sample, and provide an overview of the K-CLASH galaxy properties. We demonstrate that our sample comprises star-forming galaxies typical of their stellar masses and epochs, residing both in field and cluster environments. We conclude K-CLASH provides an ideal sample to bridge the gap between existing large integral-field spectroscopy surveys at higher and lower redshifts. We find that star-forming K-CLASH cluster galaxies at intermediate redshifts have systematically lower stellar masses than their star-forming counterparts in the field, hinting at possible 'downsizing' scenarios of galaxy growth in clusters at these epochs. We measure no difference between the star formation rates of H α-detected, star-forming galaxies in either environment after accounting for stellar mass, suggesting that cluster quenching occurs very rapidly during the epochs probed by K-CLASH, or that star-forming K-CLASH galaxies in clusters have only recently arrived there, with insufficient time elapsed for quenching to have occurred.

AB - We present the KMOS-CLASH (K-CLASH) survey, a K-band Multi-Object Spectrograph (KMOS) survey, of the spatially resolved gas properties and kinematics of 191 (pre-dominantly blue) H α-detected galaxies at 0.2 ≲ z ≲ 0.6 in field and cluster environments. K-CLASH targets galaxies in four Cluster Lensing And Supernova survey with Hubble (CLASH) fields in the KMOS IZ-band, over 7 arcmin radius (≍2–3 Mpc) fields of view. K-CLASH aims to study the transition of star-forming galaxies from turbulent, highly star-forming disc-like and peculiar systems at z ≍ 1–3, to the comparatively quiescent, ordered late-type galaxies at z ≍ 0, and to examine the role of clusters in the build-up of the red sequence since z ≍ 1. In this paper, we describe the K-CLASH survey, present the sample, and provide an overview of the K-CLASH galaxy properties. We demonstrate that our sample comprises star-forming galaxies typical of their stellar masses and epochs, residing both in field and cluster environments. We conclude K-CLASH provides an ideal sample to bridge the gap between existing large integral-field spectroscopy surveys at higher and lower redshifts. We find that star-forming K-CLASH cluster galaxies at intermediate redshifts have systematically lower stellar masses than their star-forming counterparts in the field, hinting at possible 'downsizing' scenarios of galaxy growth in clusters at these epochs. We measure no difference between the star formation rates of H α-detected, star-forming galaxies in either environment after accounting for stellar mass, suggesting that cluster quenching occurs very rapidly during the epochs probed by K-CLASH, or that star-forming K-CLASH galaxies in clusters have only recently arrived there, with insufficient time elapsed for quenching to have occurred.

KW - galaxies: star formation

KW - galaxies: evolution

KW - galaxies: general

KW - galaxies: kinematics and dynamics

U2 - 10.1093/mnras/staa1418

DO - 10.1093/mnras/staa1418

M3 - Journal article

VL - 496

SP - 649

EP - 675

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -