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The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS: mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies

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The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS : mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies. / Swinbank, A. M.; Sobral, D.; Smail, Ian; Geach, J. E.; Best, P. N.; Mccarthy, I. G.; Crain, R. A.; Theuns, T.

In: Monthly Notices of the Royal Astronomical Society, Vol. 426, No. 2, 21.10.2012, p. 935-950.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Swinbank, AM, Sobral, D, Smail, I, Geach, JE, Best, PN, Mccarthy, IG, Crain, RA & Theuns, T 2012, 'The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS: mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies', Monthly Notices of the Royal Astronomical Society, vol. 426, no. 2, pp. 935-950. https://doi.org/10.1111/j.1365-2966.2012.21774.x

APA

Swinbank, A. M., Sobral, D., Smail, I., Geach, J. E., Best, P. N., Mccarthy, I. G., Crain, R. A., & Theuns, T. (2012). The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS: mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies. Monthly Notices of the Royal Astronomical Society, 426(2), 935-950. https://doi.org/10.1111/j.1365-2966.2012.21774.x

Vancouver

Author

Swinbank, A. M. ; Sobral, D. ; Smail, Ian ; Geach, J. E. ; Best, P. N. ; Mccarthy, I. G. ; Crain, R. A. ; Theuns, T. / The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS : mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies. In: Monthly Notices of the Royal Astronomical Society. 2012 ; Vol. 426, No. 2. pp. 935-950.

Bibtex

@article{16a1b4fa021b4fe1b79f6e339b47d18d,
title = "The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS: mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies",
abstract = "We present adaptive optics assisted, spatially resolved spectroscopy of a sample of nine Hα-selected galaxies at z=0.84-2.23 drawn from the HiZELS narrow-band survey. These galaxies have star formation rates of 1-27M ⊙yr -1 and are therefore representative of the typical high-redshift star-forming population. Our ∼kpc-scale resolution observations show that approximately half of the sample have dynamics suggesting that the ionized gas is in large, rotating discs. We model their velocity fields to infer the inclination-corrected, asymptotic rotational velocities. We use the absolute B-band magnitudes and stellar masses to investigate the evolution of the B-band and stellar-mass Tully-Fisher relationships. By combining our sample with a number of similar measurements from the literature, we show that, at fixed circular velocity, the stellar mass of star-forming galaxies has increased by a factor of 2.5 between z=2 and 0, whilst the rest-frame B-band luminosity has decreased by a factor of ∼6 over the same period. Together, these demonstrate a change in mass-to-light ratio in the B band of Δ(M/L B)/(M/L B) z=0 ∼ 3.5 between z=1.5 and 0, with most of the evolution occurring below z=1. We also use the spatial variation of [Nii]/Hα to show that the metallicity of the ionized gas in these galaxies declines monotonically with galactocentric radius, with an average Δlog(O/H)/ΔR = -0.027 ± 0.005dexkpc -1. This gradient is consistent with predictions for high-redshift disc galaxies from cosmologically based hydrodynamic simulations.",
keywords = "Galaxies: evolution, Galaxies: formation, Galaxies: high-redshift",
author = "Swinbank, {A. M.} and D. Sobral and Ian Smail and Geach, {J. E.} and Best, {P. N.} and Mccarthy, {I. G.} and Crain, {R. A.} and T. Theuns",
year = "2012",
month = oct,
day = "21",
doi = "10.1111/j.1365-2966.2012.21774.x",
language = "English",
volume = "426",
pages = "935--950",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "OXFORD UNIV PRESS",
number = "2",

}

RIS

TY - JOUR

T1 - The properties of the star-forming interstellar medium at z=0.84-2.23 from HiZELS

T2 - mapping the internal dynamics and metallicity gradients in high-redshift disc galaxies

AU - Swinbank, A. M.

AU - Sobral, D.

AU - Smail, Ian

AU - Geach, J. E.

AU - Best, P. N.

AU - Mccarthy, I. G.

AU - Crain, R. A.

AU - Theuns, T.

PY - 2012/10/21

Y1 - 2012/10/21

N2 - We present adaptive optics assisted, spatially resolved spectroscopy of a sample of nine Hα-selected galaxies at z=0.84-2.23 drawn from the HiZELS narrow-band survey. These galaxies have star formation rates of 1-27M ⊙yr -1 and are therefore representative of the typical high-redshift star-forming population. Our ∼kpc-scale resolution observations show that approximately half of the sample have dynamics suggesting that the ionized gas is in large, rotating discs. We model their velocity fields to infer the inclination-corrected, asymptotic rotational velocities. We use the absolute B-band magnitudes and stellar masses to investigate the evolution of the B-band and stellar-mass Tully-Fisher relationships. By combining our sample with a number of similar measurements from the literature, we show that, at fixed circular velocity, the stellar mass of star-forming galaxies has increased by a factor of 2.5 between z=2 and 0, whilst the rest-frame B-band luminosity has decreased by a factor of ∼6 over the same period. Together, these demonstrate a change in mass-to-light ratio in the B band of Δ(M/L B)/(M/L B) z=0 ∼ 3.5 between z=1.5 and 0, with most of the evolution occurring below z=1. We also use the spatial variation of [Nii]/Hα to show that the metallicity of the ionized gas in these galaxies declines monotonically with galactocentric radius, with an average Δlog(O/H)/ΔR = -0.027 ± 0.005dexkpc -1. This gradient is consistent with predictions for high-redshift disc galaxies from cosmologically based hydrodynamic simulations.

AB - We present adaptive optics assisted, spatially resolved spectroscopy of a sample of nine Hα-selected galaxies at z=0.84-2.23 drawn from the HiZELS narrow-band survey. These galaxies have star formation rates of 1-27M ⊙yr -1 and are therefore representative of the typical high-redshift star-forming population. Our ∼kpc-scale resolution observations show that approximately half of the sample have dynamics suggesting that the ionized gas is in large, rotating discs. We model their velocity fields to infer the inclination-corrected, asymptotic rotational velocities. We use the absolute B-band magnitudes and stellar masses to investigate the evolution of the B-band and stellar-mass Tully-Fisher relationships. By combining our sample with a number of similar measurements from the literature, we show that, at fixed circular velocity, the stellar mass of star-forming galaxies has increased by a factor of 2.5 between z=2 and 0, whilst the rest-frame B-band luminosity has decreased by a factor of ∼6 over the same period. Together, these demonstrate a change in mass-to-light ratio in the B band of Δ(M/L B)/(M/L B) z=0 ∼ 3.5 between z=1.5 and 0, with most of the evolution occurring below z=1. We also use the spatial variation of [Nii]/Hα to show that the metallicity of the ionized gas in these galaxies declines monotonically with galactocentric radius, with an average Δlog(O/H)/ΔR = -0.027 ± 0.005dexkpc -1. This gradient is consistent with predictions for high-redshift disc galaxies from cosmologically based hydrodynamic simulations.

KW - Galaxies: evolution

KW - Galaxies: formation

KW - Galaxies: high-redshift

U2 - 10.1111/j.1365-2966.2012.21774.x

DO - 10.1111/j.1365-2966.2012.21774.x

M3 - Journal article

AN - SCOPUS:84867034296

VL - 426

SP - 935

EP - 950

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 2

ER -