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    Rights statement: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astnomical Society following peer review. The version of record David Sobral, Andra Stroe, Yusei Koyama, Behnam Darvish, João Calhau, Ana Afonso, Tadayuki Kodama, and Fumiaki Nakata The nature of Hα star-forming galaxies at z ∼ 0.4 in and around Cl 0939+4713: the environment matters MNRAS (June 01, 2016) Vol. 458 3443-3454 doi:10.1093/mnras/stw534 first published online March 7, 2016 is available online at:http://mnras.oxfordjournals.org/content/458/4/3443

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The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters

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The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters. / Sobral, David; Stroe, Andra; Koyama, Yusei et al.
In: Monthly Notices of the Royal Astronomical Society, Vol. 458, No. 4, 01.06.2016, p. 3443-3454.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Sobral, D, Stroe, A, Koyama, Y, Darvish, B, Calhau, J, Afonso, A, Kodama, T & Nakata, F 2016, 'The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters', Monthly Notices of the Royal Astronomical Society, vol. 458, no. 4, pp. 3443-3454. https://doi.org/10.1093/mnras/stw534

APA

Sobral, D., Stroe, A., Koyama, Y., Darvish, B., Calhau, J., Afonso, A., Kodama, T., & Nakata, F. (2016). The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters. Monthly Notices of the Royal Astronomical Society, 458(4), 3443-3454. https://doi.org/10.1093/mnras/stw534

Vancouver

Sobral D, Stroe A, Koyama Y, Darvish B, Calhau J, Afonso A et al. The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters. Monthly Notices of the Royal Astronomical Society. 2016 Jun 1;458(4):3443-3454. Epub 2016 Mar 7. doi: 10.1093/mnras/stw534

Author

Sobral, David ; Stroe, Andra ; Koyama, Yusei et al. / The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713 : the environment matters. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 458, No. 4. pp. 3443-3454.

Bibtex

@article{c373bb6141b4493797405f2358593cdd,
title = "The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713: the environment matters",
abstract = "Cluster star-forming galaxies are found to have an excess of Far-Infrared emission relative to H-alpha (Ha), when compared to those in the field, which could be caused by intense AGN activity, dust and/or declining star formation histories. Here we present spectroscopic observations of Ha emitters in the Cl 0939+4713 (Abell 851) super-cluster at z=0.41, using AF2+WYFFOS on the WHT. We measure [OII], Hbeta (Hb), [OIII], Ha and [NII] for a sample of 119 Ha emitters in and around the cluster. We find that 17+-5% of the Ha emitters are AGN, irrespective of environment. For star-forming galaxies, we obtain Balmer decrements, metallicities and ionisation parameters with different methods, individually and by stacking. We find a strong mass-metallicity relation at all environments, with no significant dependence on environment. The ionisation parameter declines with increasing stellar mass for low-mass galaxies. Ha emitters residing in intermediate environments show the highest ionisation parameters (along with high [OIII]/Ha and high [OIII]/[OII] line ratios, typically twice as large as in the highest and lowest densities), which decline with increasing environmental density. Dust extinction (A$_{H\alpha}$) correlates strongly with stellar mass, but also with environmental density. Star-forming galaxies in the densest environments are found to be significantly dustier (A$_{H\alpha}$~1.5-1.6) than those residing in the lowest density environments (A$_{H\alpha}$~0.6), deviating significantly from what would be predicted given their stellar masses.",
keywords = "astro-ph.GA, astro-ph.CO",
author = "David Sobral and Andra Stroe and Yusei Koyama and Behnam Darvish and Jo{\~a}o Calhau and Ana Afonso and Tadayuki Kodama and Fumiaki Nakata",
note = "This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astnomical Society following peer review. The version of record David Sobral, Andra Stroe, Yusei Koyama, Behnam Darvish, Jo{\~a}o Calhau, Ana Afonso, Tadayuki Kodama, and Fumiaki Nakata The nature of Hα star-forming galaxies at z ∼ 0.4 in and around Cl 0939+4713: the environment matters MNRAS (June 01, 2016) Vol. 458 3443-3454 doi:10.1093/mnras/stw534 first published online March 7, 2016 is available online at:http://mnras.oxfordjournals.org/content/458/4/3443",
year = "2016",
month = jun,
day = "1",
doi = "10.1093/mnras/stw534",
language = "English",
volume = "458",
pages = "3443--3454",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "4",

}

RIS

TY - JOUR

T1 - The nature of H-alpha star-forming galaxies at z~0.4 in and around Cl 0939+4713

T2 - the environment matters

AU - Sobral, David

AU - Stroe, Andra

AU - Koyama, Yusei

AU - Darvish, Behnam

AU - Calhau, João

AU - Afonso, Ana

AU - Kodama, Tadayuki

AU - Nakata, Fumiaki

N1 - This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astnomical Society following peer review. The version of record David Sobral, Andra Stroe, Yusei Koyama, Behnam Darvish, João Calhau, Ana Afonso, Tadayuki Kodama, and Fumiaki Nakata The nature of Hα star-forming galaxies at z ∼ 0.4 in and around Cl 0939+4713: the environment matters MNRAS (June 01, 2016) Vol. 458 3443-3454 doi:10.1093/mnras/stw534 first published online March 7, 2016 is available online at:http://mnras.oxfordjournals.org/content/458/4/3443

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Cluster star-forming galaxies are found to have an excess of Far-Infrared emission relative to H-alpha (Ha), when compared to those in the field, which could be caused by intense AGN activity, dust and/or declining star formation histories. Here we present spectroscopic observations of Ha emitters in the Cl 0939+4713 (Abell 851) super-cluster at z=0.41, using AF2+WYFFOS on the WHT. We measure [OII], Hbeta (Hb), [OIII], Ha and [NII] for a sample of 119 Ha emitters in and around the cluster. We find that 17+-5% of the Ha emitters are AGN, irrespective of environment. For star-forming galaxies, we obtain Balmer decrements, metallicities and ionisation parameters with different methods, individually and by stacking. We find a strong mass-metallicity relation at all environments, with no significant dependence on environment. The ionisation parameter declines with increasing stellar mass for low-mass galaxies. Ha emitters residing in intermediate environments show the highest ionisation parameters (along with high [OIII]/Ha and high [OIII]/[OII] line ratios, typically twice as large as in the highest and lowest densities), which decline with increasing environmental density. Dust extinction (A$_{H\alpha}$) correlates strongly with stellar mass, but also with environmental density. Star-forming galaxies in the densest environments are found to be significantly dustier (A$_{H\alpha}$~1.5-1.6) than those residing in the lowest density environments (A$_{H\alpha}$~0.6), deviating significantly from what would be predicted given their stellar masses.

AB - Cluster star-forming galaxies are found to have an excess of Far-Infrared emission relative to H-alpha (Ha), when compared to those in the field, which could be caused by intense AGN activity, dust and/or declining star formation histories. Here we present spectroscopic observations of Ha emitters in the Cl 0939+4713 (Abell 851) super-cluster at z=0.41, using AF2+WYFFOS on the WHT. We measure [OII], Hbeta (Hb), [OIII], Ha and [NII] for a sample of 119 Ha emitters in and around the cluster. We find that 17+-5% of the Ha emitters are AGN, irrespective of environment. For star-forming galaxies, we obtain Balmer decrements, metallicities and ionisation parameters with different methods, individually and by stacking. We find a strong mass-metallicity relation at all environments, with no significant dependence on environment. The ionisation parameter declines with increasing stellar mass for low-mass galaxies. Ha emitters residing in intermediate environments show the highest ionisation parameters (along with high [OIII]/Ha and high [OIII]/[OII] line ratios, typically twice as large as in the highest and lowest densities), which decline with increasing environmental density. Dust extinction (A$_{H\alpha}$) correlates strongly with stellar mass, but also with environmental density. Star-forming galaxies in the densest environments are found to be significantly dustier (A$_{H\alpha}$~1.5-1.6) than those residing in the lowest density environments (A$_{H\alpha}$~0.6), deviating significantly from what would be predicted given their stellar masses.

KW - astro-ph.GA

KW - astro-ph.CO

U2 - 10.1093/mnras/stw534

DO - 10.1093/mnras/stw534

M3 - Journal article

VL - 458

SP - 3443

EP - 3454

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -