Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7
We present a sample of similar to 1000 emission-line galaxies at z = 0.4-4.7 from the similar to 0.7deg(2) High-z Emission-Line Survey in the Bootes field identified with a suite of six narrow-band filters at approximate to 0.4-2.1 mu m. These galaxies have been selected on their Ly alpha (73), [O (...
Main Authors: | , , , , , , , |
---|---|
Other Authors: | |
Language: | en |
Published: |
OXFORD UNIV PRESS
2017
|
Subjects: | |
Online Access: | http://hdl.handle.net/10150/625736 http://arizona.openrepository.com/arizona/handle/10150/625736 |
id |
ndltd-arizona.edu-oai-arizona.openrepository.com-10150-625736 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-arizona.edu-oai-arizona.openrepository.com-10150-6257362017-10-04T03:00:29Z Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 Matthee, Jorryt Sobral, David Best, Philip Smail, Ian Bian, Fuyan Darvish, Behnam Röttgering, Huub Fan, Xiaohui Univ Arizona, Steward Observ galaxies: active galaxies: evolution galaxies: high-redshift galaxies: luminosity function,mass function galaxies: star formation We present a sample of similar to 1000 emission-line galaxies at z = 0.4-4.7 from the similar to 0.7deg(2) High-z Emission-Line Survey in the Bootes field identified with a suite of six narrow-band filters at approximate to 0.4-2.1 mu m. These galaxies have been selected on their Ly alpha (73), [O (II)] (285), H beta/[O (III)] (387) or H alpha (362) emission line, and have been classified with optical to near-infrared colours. A subsample of 98 sources have reliable redshifts from multiple narrow-band (e.g. [O (II)]-H alpha) detections and/or spectroscopy. In this survey paper, we present the observations, selection and catalogues of emitters. We measure number densities of Ly alpha, [O (II)], H beta/[O (III)] and H alpha and confirm strong luminosity evolution in star-forming galaxies from z similar to 0.4 to similar to 5, in agreement with previous results. To demonstrate the usefulness of dual-line emitters, we use the sample of dual [O (II)]-H alpha emitters to measure the observed [O (II)]/H alpha ratio at z = 1.47. The observed [O (II)]/H alpha ratio increases significantly from 0.40 +/- 0.01 at z = 0.1 to 0.52 +/- 0.05 at z = 1.47, which we attribute to either decreasing dust attenuation with redshift, or due to a bias in the (typically) fibre measurements in the local Universe that only measure the central kpc regions. At the bright end, we find that both the H alpha and Ly alpha number densities at z approximate to 2.2 deviate significantly from a Schechter form, following a power law. We show that this is driven entirely by an increasing X-ray/active galactic nucleus fraction with line luminosity, which reaches approximate to 100 per cent at line luminosities L greater than or similar to 3 x 10(44) erg s(-1). 2017-10 Article Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 2017, 471 (1):629 Monthly Notices of the Royal Astronomical Society 0035-8711 1365-2966 10.1093/mnras/stx1569 http://hdl.handle.net/10150/625736 http://arizona.openrepository.com/arizona/handle/10150/625736 Monthly Notices of the Royal Astronomical Society en https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx1569 © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society OXFORD UNIV PRESS |
collection |
NDLTD |
language |
en |
sources |
NDLTD |
topic |
galaxies: active galaxies: evolution galaxies: high-redshift galaxies: luminosity function,mass function galaxies: star formation |
spellingShingle |
galaxies: active galaxies: evolution galaxies: high-redshift galaxies: luminosity function,mass function galaxies: star formation Matthee, Jorryt Sobral, David Best, Philip Smail, Ian Bian, Fuyan Darvish, Behnam Röttgering, Huub Fan, Xiaohui Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
description |
We present a sample of similar to 1000 emission-line galaxies at z = 0.4-4.7 from the similar to 0.7deg(2) High-z Emission-Line Survey in the Bootes field identified with a suite of six narrow-band filters at approximate to 0.4-2.1 mu m. These galaxies have been selected on their Ly alpha (73), [O (II)] (285), H beta/[O (III)] (387) or H alpha (362) emission line, and have been classified with optical to near-infrared colours. A subsample of 98 sources have reliable redshifts from multiple narrow-band (e.g. [O (II)]-H alpha) detections and/or spectroscopy. In this survey paper, we present the observations, selection and catalogues of emitters. We measure number densities of Ly alpha, [O (II)], H beta/[O (III)] and H alpha and confirm strong luminosity evolution in star-forming galaxies from z similar to 0.4 to similar to 5, in agreement with previous results. To demonstrate the usefulness of dual-line emitters, we use the sample of dual [O (II)]-H alpha emitters to measure the observed [O (II)]/H alpha ratio at z = 1.47. The observed [O (II)]/H alpha ratio increases significantly from 0.40 +/- 0.01 at z = 0.1 to 0.52 +/- 0.05 at z = 1.47, which we attribute to either decreasing dust attenuation with redshift, or due to a bias in the (typically) fibre measurements in the local Universe that only measure the central kpc regions. At the bright end, we find that both the H alpha and Ly alpha number densities at z approximate to 2.2 deviate significantly from a Schechter form, following a power law. We show that this is driven entirely by an increasing X-ray/active galactic nucleus fraction with line luminosity, which reaches approximate to 100 per cent at line luminosities L greater than or similar to 3 x 10(44) erg s(-1). |
author2 |
Univ Arizona, Steward Observ |
author_facet |
Univ Arizona, Steward Observ Matthee, Jorryt Sobral, David Best, Philip Smail, Ian Bian, Fuyan Darvish, Behnam Röttgering, Huub Fan, Xiaohui |
author |
Matthee, Jorryt Sobral, David Best, Philip Smail, Ian Bian, Fuyan Darvish, Behnam Röttgering, Huub Fan, Xiaohui |
author_sort |
Matthee, Jorryt |
title |
Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
title_short |
Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
title_full |
Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
title_fullStr |
Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
title_full_unstemmed |
Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
title_sort |
boötes-hizels: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7 |
publisher |
OXFORD UNIV PRESS |
publishDate |
2017 |
url |
http://hdl.handle.net/10150/625736 http://arizona.openrepository.com/arizona/handle/10150/625736 |
work_keys_str_mv |
AT mattheejorryt booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT sobraldavid booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT bestphilip booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT smailian booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT bianfuyan booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT darvishbehnam booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT rottgeringhuub booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 AT fanxiaohui booteshizelsanopticaltonearinfraredsurveyofemissionlinegalaxiesatz0447 |
_version_ |
1718542270284693504 |