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  • 1506.02670v1

    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 I. Oteo, D. Sobral, R. J. Ivison, I. Smail, P. N. Best, J. Cepa, and A. M. Pérez-García On the nature of Hα emitters at z~ 2 from the HiZELS survey: physical properties, Lyα escape fraction and main sequence MNRAS 2015 452: 2018-2033. is available online at: http://mnras.oxfordjournals.org/content/452/2/2018

    Accepted author manuscript, 2.51 MB, PDF document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License

  • 1506.02670v1

    Accepted author manuscript, 2.51 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey: physical properties, Ly$α$ escape fraction, and main sequence

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On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey : physical properties, Ly$α$ escape fraction, and main sequence. / Oteo, I.; Sobral, D.; Ivison, R. J.; Smail, I.; Best, P. N.; Cepa, J.; Perez-Garcia, A. M.

In: Monthly Notices of the Royal Astronomical Society, Vol. 452, No. 2, 11.09.2015, p. 2018-2033.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Oteo, I, Sobral, D, Ivison, RJ, Smail, I, Best, PN, Cepa, J & Perez-Garcia, AM 2015, 'On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey: physical properties, Ly$α$ escape fraction, and main sequence', Monthly Notices of the Royal Astronomical Society, vol. 452, no. 2, pp. 2018-2033. https://doi.org/10.1093/mnras/stv1284

APA

Oteo, I., Sobral, D., Ivison, R. J., Smail, I., Best, P. N., Cepa, J., & Perez-Garcia, A. M. (2015). On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey: physical properties, Ly$α$ escape fraction, and main sequence. Monthly Notices of the Royal Astronomical Society, 452(2), 2018-2033. https://doi.org/10.1093/mnras/stv1284

Vancouver

Oteo I, Sobral D, Ivison RJ, Smail I, Best PN, Cepa J et al. On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey: physical properties, Ly$α$ escape fraction, and main sequence. Monthly Notices of the Royal Astronomical Society. 2015 Sep 11;452(2):2018-2033. https://doi.org/10.1093/mnras/stv1284

Author

Oteo, I. ; Sobral, D. ; Ivison, R. J. ; Smail, I. ; Best, P. N. ; Cepa, J. ; Perez-Garcia, A. M. / On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey : physical properties, Ly$α$ escape fraction, and main sequence. In: Monthly Notices of the Royal Astronomical Society. 2015 ; Vol. 452, No. 2. pp. 2018-2033.

Bibtex

@article{9004c086ffba4d4593abd01bcfae7009,
title = "On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey: physical properties, Ly$α$ escape fraction, and main sequence",
abstract = "We present a detailed multi-wavelength study (from rest-frame UV to far-IR) of narrow-band (NB) selected, star-forming (SF) H$\alpha$ emitters (HAEs) at $z \sim 2.23$ taken from the High Redshift(Z) Emission Line Survey (HiZELS). We find that HAEs have similar SED-derived properties and colors to $sBzK$ galaxies and probe a well-defined portion of the SF population at $z \sim 2$. This is not true for Ly$\alpha$ emitters (LAEs), which are strongly biased towards blue, less massive galaxies (missing a significant percentage of the SF population). Combining our H$\alpha$ observations with matched, existing Ly$\alpha$ data we determine that the Ly$\alpha$ escape fraction ($f_{\rm esc}$) is low (only $\sim$ 4.5\% of HAEs show Ly$\alpha$ emission) and decreases with increasing dust attenuation, UV continuum slope, stellar mass, and star formation rate (SFR). This suggests that Ly$\alpha$ preferentially escapes from blue galaxies with low dust attenuation. However, a small population of red and massive LAEs is also present in agreement with previous works. This indicates that dust and Ly$\alpha$ are not mutually exclusive. Using different and completely independent measures of the total SFR we show that the H$\alpha$ emission is an excellent tracer of star formation at $z \sim 2$ with deviations typically lower than 0.3 dex for individual galaxies. We find that the slope and zero-point of the HAE main-sequence (MS) at $z \sim 2$ strongly depend on the dust correction method used to recover SFR, although they are consistent with previous works when similar assumptions are made.",
keywords = "galaxies: evolution, galaxies: high-redshift, galaxies: star formation, STAR-FORMING GALAXIES, LYMAN-BREAK GALAXIES, SPECTRAL ENERGY-DISTRIBUTIONS, GREATER-THAN 2, ULTRAVIOLET-SELECTED GALAXIES, DUST CORRECTION FACTORS, HIGH-REDSHIFT GALAXIES, FORMATION RATE DENSITY, STELLAR MASS DENSITY, SUBARU DEEP FIELD",
author = "I. Oteo and D. Sobral and Ivison, {R. J.} and I. Smail and Best, {P. N.} and J. Cepa and Perez-Garcia, {A. M.}",
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 I. Oteo, D. Sobral, R. J. Ivison, I. Smail, P. N. Best, J. Cepa, and A. M. P{\'e}rez-Garc{\'i}a On the nature of Hα emitters at z~ 2 from the HiZELS survey: physical properties, Lyα escape fraction and main sequence MNRAS 2015 452: 2018-2033. is available online at: http://mnras.oxfordjournals.org/content/452/2/2018 ",
year = "2015",
month = sep,
day = "11",
doi = "10.1093/mnras/stv1284",
language = "English",
volume = "452",
pages = "2018--2033",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - On the nature of H$α$ emitters at $z \sim 2$ from the HiZELS survey

T2 - physical properties, Ly$α$ escape fraction, and main sequence

AU - Oteo, I.

AU - Sobral, D.

AU - Ivison, R. J.

AU - Smail, I.

AU - Best, P. N.

AU - Cepa, J.

AU - Perez-Garcia, A. M.

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 I. Oteo, D. Sobral, R. J. Ivison, I. Smail, P. N. Best, J. Cepa, and A. M. Pérez-García On the nature of Hα emitters at z~ 2 from the HiZELS survey: physical properties, Lyα escape fraction and main sequence MNRAS 2015 452: 2018-2033. is available online at: http://mnras.oxfordjournals.org/content/452/2/2018

PY - 2015/9/11

Y1 - 2015/9/11

N2 - We present a detailed multi-wavelength study (from rest-frame UV to far-IR) of narrow-band (NB) selected, star-forming (SF) H$\alpha$ emitters (HAEs) at $z \sim 2.23$ taken from the High Redshift(Z) Emission Line Survey (HiZELS). We find that HAEs have similar SED-derived properties and colors to $sBzK$ galaxies and probe a well-defined portion of the SF population at $z \sim 2$. This is not true for Ly$\alpha$ emitters (LAEs), which are strongly biased towards blue, less massive galaxies (missing a significant percentage of the SF population). Combining our H$\alpha$ observations with matched, existing Ly$\alpha$ data we determine that the Ly$\alpha$ escape fraction ($f_{\rm esc}$) is low (only $\sim$ 4.5\% of HAEs show Ly$\alpha$ emission) and decreases with increasing dust attenuation, UV continuum slope, stellar mass, and star formation rate (SFR). This suggests that Ly$\alpha$ preferentially escapes from blue galaxies with low dust attenuation. However, a small population of red and massive LAEs is also present in agreement with previous works. This indicates that dust and Ly$\alpha$ are not mutually exclusive. Using different and completely independent measures of the total SFR we show that the H$\alpha$ emission is an excellent tracer of star formation at $z \sim 2$ with deviations typically lower than 0.3 dex for individual galaxies. We find that the slope and zero-point of the HAE main-sequence (MS) at $z \sim 2$ strongly depend on the dust correction method used to recover SFR, although they are consistent with previous works when similar assumptions are made.

AB - We present a detailed multi-wavelength study (from rest-frame UV to far-IR) of narrow-band (NB) selected, star-forming (SF) H$\alpha$ emitters (HAEs) at $z \sim 2.23$ taken from the High Redshift(Z) Emission Line Survey (HiZELS). We find that HAEs have similar SED-derived properties and colors to $sBzK$ galaxies and probe a well-defined portion of the SF population at $z \sim 2$. This is not true for Ly$\alpha$ emitters (LAEs), which are strongly biased towards blue, less massive galaxies (missing a significant percentage of the SF population). Combining our H$\alpha$ observations with matched, existing Ly$\alpha$ data we determine that the Ly$\alpha$ escape fraction ($f_{\rm esc}$) is low (only $\sim$ 4.5\% of HAEs show Ly$\alpha$ emission) and decreases with increasing dust attenuation, UV continuum slope, stellar mass, and star formation rate (SFR). This suggests that Ly$\alpha$ preferentially escapes from blue galaxies with low dust attenuation. However, a small population of red and massive LAEs is also present in agreement with previous works. This indicates that dust and Ly$\alpha$ are not mutually exclusive. Using different and completely independent measures of the total SFR we show that the H$\alpha$ emission is an excellent tracer of star formation at $z \sim 2$ with deviations typically lower than 0.3 dex for individual galaxies. We find that the slope and zero-point of the HAE main-sequence (MS) at $z \sim 2$ strongly depend on the dust correction method used to recover SFR, although they are consistent with previous works when similar assumptions are made.

KW - galaxies: evolution

KW - galaxies: high-redshift

KW - galaxies: star formation

KW - STAR-FORMING GALAXIES

KW - LYMAN-BREAK GALAXIES

KW - SPECTRAL ENERGY-DISTRIBUTIONS

KW - GREATER-THAN 2

KW - ULTRAVIOLET-SELECTED GALAXIES

KW - DUST CORRECTION FACTORS

KW - HIGH-REDSHIFT GALAXIES

KW - FORMATION RATE DENSITY

KW - STELLAR MASS DENSITY

KW - SUBARU DEEP FIELD

U2 - 10.1093/mnras/stv1284

DO - 10.1093/mnras/stv1284

M3 - Journal article

VL - 452

SP - 2018

EP - 2033

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -