Show simple item record

dc.contributor.authorMatthee, Jorryt
dc.contributor.authorSobral, D.
dc.contributor.authorBest, Philip
dc.contributor.authorSmail, Ian
dc.contributor.authorBian, Fuyan
dc.contributor.authorDarvish, Behnam
dc.contributor.authorRöttgering, Huub
dc.contributor.authorFan, Xiaohui
dc.date.accessioned2017-10-02T16:06:52Z
dc.date.available2017-10-02T16:06:52Z
dc.date.issued2017-10
dc.identifier.citationBoötes-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 Societyen
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966
dc.identifier.doi10.1093/mnras/stx1569
dc.identifier.urihttp://hdl.handle.net/10150/625736
dc.description.abstractWe 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).
dc.description.sponsorshipLeiden University; NWO/VENI; STFC [ST/L00075X/1, ST/M001229/1]; ERC Advanced Grant DUSTYGAL [321334]; Royal Society/Wolfson Merit Award; ERC Advanced Investigator programme New-Clusters [321271]; NASA through the Astrophysics Data Analysis Program (ADAP) [NNX12AE20G]; ESO Telescopes at the La Silla Paranal Observatory under ESO programme [098.A-0819, 179.A-2005]; National Optical Astronomy Observatory (NOAO); [S14A-086]; [2013AN002]; [2013BN008]; [2014AC88]; [2014AN002]; [2014BN006]; [2014BC118]; [2016AN001]; [2016AN004]; [2016BN011]; [C267D]en
dc.language.isoenen
dc.publisherOXFORD UNIV PRESSen
dc.relation.urlhttps://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx1569en
dc.rights© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectgalaxies: activeen
dc.subjectgalaxies: evolutionen
dc.subjectgalaxies: high-redshiften
dc.subjectgalaxies: luminosity function,mass functionen
dc.subjectgalaxies: star formationen
dc.titleBoötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4–4.7en
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.identifier.journalMonthly Notices of the Royal Astronomical Societyen
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-08-20T03:55:34Z
html.description.abstractWe 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).


Files in this item

Thumbnail
Name:
Matthee_et_al_Bootes-HiZELS.pdf
Size:
6.993Mb
Format:
PDF
Description:
FInal Published Version

This item appears in the following Collection(s)

Show simple item record