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The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS

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The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS. / Sobral, D.; Swinbank, A. M.; Stott, J. P.; Matthee, J.; Bower, R. G.; Smail, Ian; Best, P.; Geach, J. E.; Sharples, R. M.

In: The Astrophysical Journal, Vol. 779, No. 2, 139, 20.12.2013.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Sobral, D, Swinbank, AM, Stott, JP, Matthee, J, Bower, RG, Smail, I, Best, P, Geach, JE & Sharples, RM 2013, 'The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS', The Astrophysical Journal, vol. 779, no. 2, 139. https://doi.org/10.1088/0004-637X/779/2/139

APA

Sobral, D., Swinbank, A. M., Stott, J. P., Matthee, J., Bower, R. G., Smail, I., Best, P., Geach, J. E., & Sharples, R. M. (2013). The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS. The Astrophysical Journal, 779(2), [139]. https://doi.org/10.1088/0004-637X/779/2/139

Vancouver

Sobral D, Swinbank AM, Stott JP, Matthee J, Bower RG, Smail I et al. The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS. The Astrophysical Journal. 2013 Dec 20;779(2). 139. https://doi.org/10.1088/0004-637X/779/2/139

Author

Sobral, D. ; Swinbank, A. M. ; Stott, J. P. ; Matthee, J. ; Bower, R. G. ; Smail, Ian ; Best, P. ; Geach, J. E. ; Sharples, R. M. / The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS. In: The Astrophysical Journal. 2013 ; Vol. 779, No. 2.

Bibtex

@article{2bfceba15d9b4d168321c01bce307156,
title = "The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS",
abstract = "We present the spatially resolved Hα dynamics of 16 star-forming galaxies at z ∼ 0.81 using the new KMOS multi-object integral field spectrograph on the ESO Very Large Telescope. These galaxies, selected using 1.18 μm narrowband imaging from the 10 deg2 CFHT-HiZELS survey of the SA 22 hr field, are found in a ∼4 Mpc overdensity of Hα emitters and likely reside in a group/intermediate environment, but not a cluster. We confirm and identify a rich group of star-forming galaxies at z = 0.813 ± 0.003, with 13 galaxies within 1000 km s-1 of each other, and seven within a diameter of 3 Mpc. All of our galaxies are {"}typical{"} star-forming galaxies at their redshift, 0.8 ± 0.4 SFR, spanning a range of specific star formation rates (sSFRs) of 0.2-1.1 Gyr-1 and have a median metallicity very close to solar of 12 + log(O/H) = 8.62 ± 0.06. We measure the spatially resolved Hα dynamics of the galaxies in our sample and show that 13 out of 16 galaxies can be described by rotating disks and use the data to derive inclination corrected rotation speeds of 50-275 km s -1. The fraction of disks within our sample is 75% ± 8%, consistent with previous results based on Hubble Space Telescope morphologies of Hα-selected galaxies at z ∼ 1 and confirming that disks dominate the SFR density at z ∼ 1. Our Hα galaxies are well fitted by the z ∼ 1-2 Tully-Fisher (TF) relation, confirming the evolution seen in the zero point. Apart from having, on average, higher stellar masses and lower sSFRs, our group galaxies at z = 0.81 present the same mass-metallicity and TF relation as z ∼ 1 field galaxies and are all disk galaxies.",
keywords = "galaxies: evolution, galaxies: high-redshift, galaxies: starburst",
author = "D. Sobral and Swinbank, {A. M.} and Stott, {J. P.} and J. Matthee and Bower, {R. G.} and Ian Smail and P. Best and Geach, {J. E.} and Sharples, {R. M.}",
year = "2013",
month = dec,
day = "20",
doi = "10.1088/0004-637X/779/2/139",
language = "English",
volume = "779",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - The dynamics of z = 0.8 Hα-selected star-forming galaxies from KMOS/CF-HiZELS

AU - Sobral, D.

AU - Swinbank, A. M.

AU - Stott, J. P.

AU - Matthee, J.

AU - Bower, R. G.

AU - Smail, Ian

AU - Best, P.

AU - Geach, J. E.

AU - Sharples, R. M.

PY - 2013/12/20

Y1 - 2013/12/20

N2 - We present the spatially resolved Hα dynamics of 16 star-forming galaxies at z ∼ 0.81 using the new KMOS multi-object integral field spectrograph on the ESO Very Large Telescope. These galaxies, selected using 1.18 μm narrowband imaging from the 10 deg2 CFHT-HiZELS survey of the SA 22 hr field, are found in a ∼4 Mpc overdensity of Hα emitters and likely reside in a group/intermediate environment, but not a cluster. We confirm and identify a rich group of star-forming galaxies at z = 0.813 ± 0.003, with 13 galaxies within 1000 km s-1 of each other, and seven within a diameter of 3 Mpc. All of our galaxies are "typical" star-forming galaxies at their redshift, 0.8 ± 0.4 SFR, spanning a range of specific star formation rates (sSFRs) of 0.2-1.1 Gyr-1 and have a median metallicity very close to solar of 12 + log(O/H) = 8.62 ± 0.06. We measure the spatially resolved Hα dynamics of the galaxies in our sample and show that 13 out of 16 galaxies can be described by rotating disks and use the data to derive inclination corrected rotation speeds of 50-275 km s -1. The fraction of disks within our sample is 75% ± 8%, consistent with previous results based on Hubble Space Telescope morphologies of Hα-selected galaxies at z ∼ 1 and confirming that disks dominate the SFR density at z ∼ 1. Our Hα galaxies are well fitted by the z ∼ 1-2 Tully-Fisher (TF) relation, confirming the evolution seen in the zero point. Apart from having, on average, higher stellar masses and lower sSFRs, our group galaxies at z = 0.81 present the same mass-metallicity and TF relation as z ∼ 1 field galaxies and are all disk galaxies.

AB - We present the spatially resolved Hα dynamics of 16 star-forming galaxies at z ∼ 0.81 using the new KMOS multi-object integral field spectrograph on the ESO Very Large Telescope. These galaxies, selected using 1.18 μm narrowband imaging from the 10 deg2 CFHT-HiZELS survey of the SA 22 hr field, are found in a ∼4 Mpc overdensity of Hα emitters and likely reside in a group/intermediate environment, but not a cluster. We confirm and identify a rich group of star-forming galaxies at z = 0.813 ± 0.003, with 13 galaxies within 1000 km s-1 of each other, and seven within a diameter of 3 Mpc. All of our galaxies are "typical" star-forming galaxies at their redshift, 0.8 ± 0.4 SFR, spanning a range of specific star formation rates (sSFRs) of 0.2-1.1 Gyr-1 and have a median metallicity very close to solar of 12 + log(O/H) = 8.62 ± 0.06. We measure the spatially resolved Hα dynamics of the galaxies in our sample and show that 13 out of 16 galaxies can be described by rotating disks and use the data to derive inclination corrected rotation speeds of 50-275 km s -1. The fraction of disks within our sample is 75% ± 8%, consistent with previous results based on Hubble Space Telescope morphologies of Hα-selected galaxies at z ∼ 1 and confirming that disks dominate the SFR density at z ∼ 1. Our Hα galaxies are well fitted by the z ∼ 1-2 Tully-Fisher (TF) relation, confirming the evolution seen in the zero point. Apart from having, on average, higher stellar masses and lower sSFRs, our group galaxies at z = 0.81 present the same mass-metallicity and TF relation as z ∼ 1 field galaxies and are all disk galaxies.

KW - galaxies: evolution

KW - galaxies: high-redshift

KW - galaxies: starburst

U2 - 10.1088/0004-637X/779/2/139

DO - 10.1088/0004-637X/779/2/139

M3 - Journal article

AN - SCOPUS:84890033941

VL - 779

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 139

ER -