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    Rights statement: 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 David Sobral, Saul A. Kohn, Philip N. Best, Ian Smail, Chris M. Harrison, John Stott, João Calhau, and Jorryt Matthee The most luminous H α emitters at z ∼ 0.8–2.23 from HiZELS: evolution of AGN and star-forming galaxies MNRAS (April 01, 2016) Vol. 457 1739-1752 is available online at: http://mnras.oxfordjournals.org/content/457/2/1739

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

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The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies. / Sobral, David; Kohn, Saul A.; Best, Philip N. et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 457, No. 2, 01.04.2016, p. 1739-1752.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Sobral, D, Kohn, SA, Best, PN, Smail, I, Harrison, CM, Stott, J, Calhau, J & Matthee, J 2016, 'The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies', Monthly Notices of the Royal Astronomical Society, vol. 457, no. 2, pp. 1739-1752. https://doi.org/10.1093/mnras/stw022

APA

Sobral, D., Kohn, S. A., Best, P. N., Smail, I., Harrison, C. M., Stott, J., Calhau, J., & Matthee, J. (2016). The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 457(2), 1739-1752. https://doi.org/10.1093/mnras/stw022

Vancouver

Sobral D, Kohn SA, Best PN, Smail I, Harrison CM, Stott J et al. The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies. Monthly Notices of the Royal Astronomical Society. 2016 Apr 1;457(2):1739-1752. Epub 2016 Feb 4. doi: 10.1093/mnras/stw022

Author

Sobral, David ; Kohn, Saul A. ; Best, Philip N. et al. / The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS : evolution of AGN and star-forming galaxies. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 457, No. 2. pp. 1739-1752.

Bibtex

@article{b8434fb511b84abfaa6edd57c5a7b407,
title = "The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS: evolution of AGN and star-forming galaxies",
abstract = "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 broad-line AGN, BL-AGN), and we find little to no evolution in the AGN fraction with redshift, within the errors. However, the AGN fraction increases strongly with Ha luminosity and correlates best with $L_{H\alpha}/L_{H\alpha}^*(z)$. While $L_{H\alpha} 80%), the most luminous Ha emitters ($L_{H\alpha}>10L_{H\alpha}^*(z)$) at any cosmic time are essentially all BL-AGN. Using our AGN-decontaminated sample of luminous star-forming galaxies, and integrating down to a fixed Ha luminosity, we find a factor of ~1300x evolution in the star formation rate density from z=0 to z=2.23. This is much stronger than the evolution from typical Ha star-forming galaxies and in line with the evolution seen for constant luminosity cuts used to select {"}Ultra-Luminous{"} Infrared Galaxies and/or sub-millimetre galaxies. By taking into account the evolution in the typical Ha luminosity, we show that the most strongly star-forming Ha-selected galaxies at any epoch ($L_{H\alpha}>L^*_{H\alpha}(z)$) contribute the same fractional amount of ~15% to the total star-formation rate density, at least up to z=2.23.",
keywords = "astro-ph.GA, astro-ph.CO",
author = "David Sobral and Kohn, {Saul A.} and Best, {Philip N.} and Ian Smail and Harrison, {Chris M.} and John Stott and Jo{\~a}o Calhau and Jorryt Matthee",
note = "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 David Sobral, Saul A. Kohn, Philip N. Best, Ian Smail, Chris M. Harrison, John Stott, Jo{\~a}o Calhau, and Jorryt Matthee The most luminous H α emitters at z ∼ 0.8–2.23 from HiZELS: evolution of AGN and star-forming galaxies MNRAS (April 01, 2016) Vol. 457 1739-1752 is available online at: http://mnras.oxfordjournals.org/content/457/2/1739",
year = "2016",
month = apr,
day = "1",
doi = "10.1093/mnras/stw022",
language = "English",
volume = "457",
pages = "1739--1752",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - The most luminous H$α$ emitters at z~0.8-2.23 from HiZELS

T2 - evolution of AGN and star-forming galaxies

AU - Sobral, David

AU - Kohn, Saul A.

AU - Best, Philip N.

AU - Smail, Ian

AU - Harrison, Chris M.

AU - Stott, John

AU - Calhau, João

AU - Matthee, Jorryt

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 David Sobral, Saul A. Kohn, Philip N. Best, Ian Smail, Chris M. Harrison, John Stott, João Calhau, and Jorryt Matthee The most luminous H α emitters at z ∼ 0.8–2.23 from HiZELS: evolution of AGN and star-forming galaxies MNRAS (April 01, 2016) Vol. 457 1739-1752 is available online at: http://mnras.oxfordjournals.org/content/457/2/1739

PY - 2016/4/1

Y1 - 2016/4/1

N2 - 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 broad-line AGN, BL-AGN), and we find little to no evolution in the AGN fraction with redshift, within the errors. However, the AGN fraction increases strongly with Ha luminosity and correlates best with $L_{H\alpha}/L_{H\alpha}^*(z)$. While $L_{H\alpha} 80%), the most luminous Ha emitters ($L_{H\alpha}>10L_{H\alpha}^*(z)$) at any cosmic time are essentially all BL-AGN. Using our AGN-decontaminated sample of luminous star-forming galaxies, and integrating down to a fixed Ha luminosity, we find a factor of ~1300x evolution in the star formation rate density from z=0 to z=2.23. This is much stronger than the evolution from typical Ha star-forming galaxies and in line with the evolution seen for constant luminosity cuts used to select "Ultra-Luminous" Infrared Galaxies and/or sub-millimetre galaxies. By taking into account the evolution in the typical Ha luminosity, we show that the most strongly star-forming Ha-selected galaxies at any epoch ($L_{H\alpha}>L^*_{H\alpha}(z)$) contribute the same fractional amount of ~15% to the total star-formation rate density, at least up to z=2.23.

AB - 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 broad-line AGN, BL-AGN), and we find little to no evolution in the AGN fraction with redshift, within the errors. However, the AGN fraction increases strongly with Ha luminosity and correlates best with $L_{H\alpha}/L_{H\alpha}^*(z)$. While $L_{H\alpha} 80%), the most luminous Ha emitters ($L_{H\alpha}>10L_{H\alpha}^*(z)$) at any cosmic time are essentially all BL-AGN. Using our AGN-decontaminated sample of luminous star-forming galaxies, and integrating down to a fixed Ha luminosity, we find a factor of ~1300x evolution in the star formation rate density from z=0 to z=2.23. This is much stronger than the evolution from typical Ha star-forming galaxies and in line with the evolution seen for constant luminosity cuts used to select "Ultra-Luminous" Infrared Galaxies and/or sub-millimetre galaxies. By taking into account the evolution in the typical Ha luminosity, we show that the most strongly star-forming Ha-selected galaxies at any epoch ($L_{H\alpha}>L^*_{H\alpha}(z)$) contribute the same fractional amount of ~15% to the total star-formation rate density, at least up to z=2.23.

KW - astro-ph.GA

KW - astro-ph.CO

U2 - 10.1093/mnras/stw022

DO - 10.1093/mnras/stw022

M3 - Journal article

VL - 457

SP - 1739

EP - 1752

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -