# The most luminous H α emitters at z ˜ 0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies

@article{Sobral2016TheML,
title={The most luminous H $\alpha$ emitters at z ˜ 0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies},
author={David Sobral and Saul A. Kohn and Philip N. Best and I. R. Smail and C. M. Harrison and John P Stott and Jo{\~a}o Calhau and Jorryt Matthee},
journal={Monthly Notices of the Royal Astronomical Society},
year={2016},
volume={457},
pages={1739-1752}
}
• D. Sobral, +5 authors J. Matthee
• Published 2016
• Physics
• Monthly Notices of the Royal Astronomical Society
We use new near-infrared spectroscopic observations to investigate the nature and evolution of the most luminous H\alpha (Ha) emitters at z~0.8-2.23, which evolve strongly in number density over this period, and compare them to more typical Ha emitters. We study 59 luminous Ha emitters with $L_{H\alpha}>L_{H\alpha}^*$, roughly equally split per redshift slice at z~0.8, 1.47 and 2.23 from the HiZELS and CF-HiZELS surveys. We find that, overall, 30$\pm$8% are AGN (80$\pm$30% of these AGN are… Expand

#### Figures and Tables from this paper

The nature of luminous Ly α emitters at z ∼ 2–3: maximal dust-poor starbursts and highly ionizing AGN
Deep narrow-band surveys have revealed a large population of faint Ly α emitters (LAEs) in the distant Universe, but relatively little is known about the most luminous sources (L_(Lyα) ≳ 10^(42.7) Expand
The H α luminosity-dependent clustering of star-forming galaxies from z ∼ 0.8 to ∼2.2 with HiZELS.
We present clustering analyses of identically-selected star-forming galaxies in 3 narrow redshift slices (at z=0.8, z=1.47 and z=2.23), from HiZELS, a deep, near-infrared narrow-band survey. TheExpand
[O III] emission line as a tracer of star-forming galaxies at high redshifts: comparison between Hα and [O III] emitters at z=2.23 in HiZELS
We investigate the properties of z=2.23 Hα and [Oiii]λ5007 emitters using the narrow-bandselected samples obtained from the High-z Emission Line Survey (HiZELS: Sobral et al. 2013). We construct twoExpand
A 16 deg2 survey of emission-line galaxies at z < 1.5 in HSC-SSP Public Data Release 1
We present initial results from the Subaru Strategic Program (SSP) with Hyper Suprime-Cam (HSC) on a comprehensive survey of emission-line galaxies at z 5\times10^5$Mpc$^3$is essential to overcomeExpand The nature of Hβ+[O III] and [O II] emitters to z ∼ 5 with HiZELS: stellar mass functions and the evolution of EWs We investigate the properties of ∼7000 narrow-band selected galaxies with strong Hβ+[O III] and [O II] nebular emission lines from the High-z Emission-Line Survey between z ∼ 0.8 and 5.0. Our sampleExpand The MOSDEF Survey: Significant Evolution in the Rest-Frame Optical Emission Line Equivalent Widths of Star-Forming Galaxies at z=1.4-3.8. We use extensive spectroscopy from the MOSFIRE Deep Evolution Field (MOSDEF) survey to investigate the relationships between rest-frame optical emission line equivalent widths ($W$) and a number ofExpand Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4-4.7 We present a sample of ∼1000 emission-line galaxies at z = 0.4–4.7 from the ∼0.7deg^2 High-z Emission-Line Survey in the Bootes field identified with a suite of six narrow-band filters at ≈0.4–2.1Expand Tomographic Intensity Mapping versus Galaxy Surveys: Observing the Universe in H-alpha emission with new generation instruments • Physics • 2017 The H-alpha line emission is an important probe for a number of fundamental quantities in galaxies, including their number density, star formation rate (SFR) and overall gas content. A new generationExpand A 1.4 deg2 blind survey for C II], C III] and C IV at z ∼ 0.7–1.5 – II. Luminosity functions and cosmic average line ratios • Physics • 2017 Recently, the CIII] and CIV emission lines have been observed in galaxies in the early Universe ($z>5\$), providing new ways to measure their redshift and study their stellar populations and AGN. WeExpand
The CALYMHA survey : Lyα luminosity function and global escape fraction of Lyα photons at z = 2.23
We present the CAlibrating LYMan-α with Hα (CALYMHA) pilot survey and new results on Lyman α (Lyα) selected galaxies at z ∼ 2. We use a custom-built Lyα narrow-band filter at the Isaac NewtonExpand

#### References

SHOWING 1-10 OF 81 REFERENCES
Nature of Hα selected galaxies at z > 2. I. Main-sequence and dusty star-forming galaxies
• Physics
• 2013
We present the results from our narrow-band imaging surveys of Hα emitters (HAEs) at z = 2.2 and z = 2.5 in the Subaru/XMM-Newton Deep survey Field with near-infrared camera MOIRCS on the SubaruExpand
HiZELS: a high-redshift survey of Hα emitters – I. The cosmic star formation rate and clustering at z= 2.23
We present results from a near-infrared narrow-band survey of emission-line galaxies at z = 2.23, using the Wide Field Camera on the United Kingdom Infrared Telescope. The H2S1 narrow-band filter (Expand
Obscured star formation at z= 0.84 with HiZELS: the relationship between star formation rate and Hα or ultraviolet dust extinction★
We compare Hα, ultraviolet (UV) and infrared (IR) indicators of star formation rate (SFR) for a well-defined sample of z = 0.84 emission-line galaxies from the High-. z Emission Line Survey (HiZELS).Expand
HiZELS:a high-redshift survey of Hα emitters - II. the nature of star-forming galaxies at z = 0.84
New results from a large survey of Hα emission-line galaxies at z = 0.84 using the Wide Field Camera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band areExpand
A search for clusters at high redshift: IV. Spectroscopy of Hα emitters in a proto-cluster at z = 2.16
Radio galaxy PKS 1138−262 is a massive galaxy at z = 2.16, located in a dense environment. We have found an overdensity of Lyα emitting galaxies in this field, consistent with a proto-clusterExpand
Herschel reveals the obscured star formation in HiZELS Hα emitters at z = 1.47
We describe the far-infrared (far-IR; rest-frame 8–1000-μm) properties of a sample of 443 Hα-selected star-forming galaxies in the Cosmic Evolution Survey (COSMOS) and Ultra Deep Survey (UDS) fieldsExpand
A large Hα survey at z = 2.23, 1.47, 0.84 and 0.40: the 11 Gyr evolution of star-forming galaxies from HiZELS
This paper presents new deep and wide narrow-band surveys undertaken with United Kingdom Infrared Telescope (UKIRT), Subaru and the Very Large Telescope (VLT), a unique combined effort to selectExpand
Hubble Space Telescope Hα imaging of star-forming galaxies at z 1-1.5: evolution in the size and luminosity of giant H II regions
We present Hubble Space Telescope/Wide Field Camera 3 narrow-band imaging of the Hα emission in a sample of eight gravitationally lensed galaxies at z = 1–1.5. The magnification caused by theExpand
GOODS-Herschel: impact of active galactic nuclei and star formation activity on infrared spectral energy distributions at high redshift
We explore the effects of active galactic nuclei (AGNs) and star formation activity on the infrared (0.3-1000 mu m) spectral energy distributions (SEDs) of luminous infrared galaxies from z = 0.5 toExpand
Evolution of the dusty infrared luminosity function from z = 0 to z = 2.3 using observations from Spitzer
Aims. We derive the evolution of the infrared luminosity function (LF) over the last 4/5ths of cosmic time using deep 24 and 70 μm imaging of the GOODS North and South fields. Methods. We use anExpand