GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters

L. Wang; P. Norberg; M. L. P. Gunawardhana; S. Heinis; I. K. Baldry; J. Bland-Hawthorn; N. Bourne; S. Brough; M. J. I. Brown; M. E. Cluver; A. Cooray; E. da Cunha; S. P. Driver; L. Dunne; S. Dye; S. Eales; M. W. Grootes; B. W. Holwerda; Andrew M. Hopkins; E. Ibar; R. Ivison; C. Lacey; M. A. Lara-Lopez; J. Loveday; S. J. Maddox; M. J. Michałowski; I. Oteo; M. S. Owers; C. C. Popescu; D. J. B. Smith; E. N. Taylor; R. J. Tuffs; P. van der Werf

doi:10.1093/mnras/stw1450

GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters

L. Wang, P. Norberg, M. L. P. Gunawardhana, S. Heinis, I. K. Baldry, J. Bland-Hawthorn, N. Bourne, S. Brough, M. J. I. Brown, M. E. Cluver, A. Cooray, E. da Cunha, S. P. Driver, L. Dunne, S. Dye, S. Eales, M. W. Grootes, B. W. Holwerda, Andrew M. Hopkins, E. IbarR. Ivison, C. Lacey, M. A. Lara-Lopez, J. Loveday, S. J. Maddox, M. J. Michałowski, I. Oteo, M. S. Owers, C. C. Popescu, D. J. B. Smith, E. N. Taylor, R. J. Tuffs, P. van der Werf

Western Sydney University

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18 Citations (Scopus)

Abstract

We compare common star formation rate (SFR) indicators in the local Universe in the Galaxy and Mass Assembly (GAMA) equatorial fields (~160 deg2), using ultraviolet (UV) photometry from GALEX, far-infrared and sub-millimetre (sub-mm) photometry from Herschel Astrophysical Terahertz Large Area Survey, and HÎ± spectroscopy from the GAMA survey. With a high-quality sample of 745 galaxies (median redshift ã€ˆzã€‰ = 0.08), we consider three SFR tracers: UV luminosity corrected for dust attenuation using the UV spectral slope Î² (SFRUV, corr), HÎ± line luminosity corrected for dust using the Balmer decrement (BD) (SFRHÎ±, corr), and the combination of UV and infrared (IR) emission (SFRUV + IR). We demonstrate that SFRUV, corr can be reconciled with the other two tracers after applying attenuation corrections by calibrating Infrared excess (IRX; i.e. the IR to UV luminosity ratio) and attenuation in the HÎ± (derived from BD) against Î². However, Î², on its own, is very unlikely to be a reliable attenuation indicator. We find that attenuation correction factors depend on parameters such as stellar mass (M*), z and dust temperature (Tdust), but not on HÎ± equivalent width or SÃƒÂƒÃ‚Â©rsic index. Due to the large scatter in the IRX versus Î² correlation, when compared to SFRUV + IR, the Î²-corrected SFRUV, corr exhibits systematic deviations as a function of IRX, BD and Tdust.

Original language	English
Pages (from-to)	1898-1916
Number of pages	19
Journal	Monthly Notices of the Royal Astronomical Society
Volume	461
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stw1450
Publication status	Published - 2016

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Wang, L., Norberg, P., Gunawardhana, M. L. P., Heinis, S., Baldry, I. K., Bland-Hawthorn, J., Bourne, N., Brough, S., Brown, M. J. I., Cluver, M. E., Cooray, A., da Cunha, E., Driver, S. P., Dunne, L., Dye, S., Eales, S., Grootes, M. W., Holwerda, B. W., Hopkins, A. M., ... van der Werf, P. (2016). GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters. Monthly Notices of the Royal Astronomical Society, 461(2), 1898-1916. https://doi.org/10.1093/mnras/stw1450

@article{33a23e7b503947c8b52cdaf25e381a8d,

title = "GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters",

abstract = "We compare common star formation rate (SFR) indicators in the local Universe in the Galaxy and Mass Assembly (GAMA) equatorial fields (~160 deg2), using ultraviolet (UV) photometry from GALEX, far-infrared and sub-millimetre (sub-mm) photometry from Herschel Astrophysical Terahertz Large Area Survey, and H{\^I}± spectroscopy from the GAMA survey. With a high-quality sample of 745 galaxies (median redshift {\~a}€ˆz{\~a}€‰ = 0.08), we consider three SFR tracers: UV luminosity corrected for dust attenuation using the UV spectral slope {\^I}² (SFRUV, corr), H{\^I}± line luminosity corrected for dust using the Balmer decrement (BD) (SFRH{\^I}±, corr), and the combination of UV and infrared (IR) emission (SFRUV + IR). We demonstrate that SFRUV, corr can be reconciled with the other two tracers after applying attenuation corrections by calibrating Infrared excess (IRX; i.e. the IR to UV luminosity ratio) and attenuation in the H{\^I}± (derived from BD) against {\^I}². However, {\^I}², on its own, is very unlikely to be a reliable attenuation indicator. We find that attenuation correction factors depend on parameters such as stellar mass (M*), z and dust temperature (Tdust), but not on H{\^I}± equivalent width or S{\~A}ƒ{\^A}ƒ{\~A}‚{\^A}{\textcopyright}rsic index. Due to the large scatter in the IRX versus {\^I}² correlation, when compared to SFRUV + IR, the {\^I}²-corrected SFRUV, corr exhibits systematic deviations as a function of IRX, BD and Tdust.",

author = "L. Wang and P. Norberg and Gunawardhana, {M. L. P.} and S. Heinis and Baldry, {I. K.} and J. Bland-Hawthorn and N. Bourne and S. Brough and Brown, {M. J. I.} and Cluver, {M. E.} and A. Cooray and {da Cunha}, E. and Driver, {S. P.} and L. Dunne and S. Dye and S. Eales and Grootes, {M. W.} and Holwerda, {B. W.} and Hopkins, {Andrew M.} and E. Ibar and R. Ivison and C. Lacey and Lara-Lopez, {M. A.} and J. Loveday and Maddox, {S. J.} and Micha{\l}owski, {M. J.} and I. Oteo and Owers, {M. S.} and Popescu, {C. C.} and Smith, {D. J. B.} and Taylor, {E. N.} and Tuffs, {R. J.} and {van der Werf}, P.",

year = "2016",

doi = "10.1093/mnras/stw1450",

language = "English",

volume = "461",

pages = "1898--1916",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Wang, L, Norberg, P, Gunawardhana, MLP, Heinis, S, Baldry, IK, Bland-Hawthorn, J, Bourne, N, Brough, S, Brown, MJI, Cluver, ME, Cooray, A, da Cunha, E, Driver, SP, Dunne, L, Dye, S, Eales, S, Grootes, MW, Holwerda, BW, Hopkins, AM, Ibar, E, Ivison, R, Lacey, C, Lara-Lopez, MA, Loveday, J, Maddox, SJ, Michałowski, MJ, Oteo, I, Owers, MS, Popescu, CC, Smith, DJB, Taylor, EN, Tuffs, RJ & van der Werf, P 2016, 'GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters', Monthly Notices of the Royal Astronomical Society, vol. 461, no. 2, pp. 1898-1916. https://doi.org/10.1093/mnras/stw1450

TY - JOUR

T1 - GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters

AU - Wang, L.

AU - Norberg, P.

AU - Gunawardhana, M. L. P.

AU - Heinis, S.

AU - Baldry, I. K.

AU - Bland-Hawthorn, J.

AU - Bourne, N.

AU - Brough, S.

AU - Brown, M. J. I.

AU - Cluver, M. E.

AU - Cooray, A.

AU - da Cunha, E.

AU - Driver, S. P.

AU - Dunne, L.

AU - Dye, S.

AU - Eales, S.

AU - Grootes, M. W.

AU - Holwerda, B. W.

AU - Hopkins, Andrew M.

AU - Ibar, E.

AU - Ivison, R.

AU - Lacey, C.

AU - Lara-Lopez, M. A.

AU - Loveday, J.

AU - Maddox, S. J.

AU - Michałowski, M. J.

AU - Oteo, I.

AU - Owers, M. S.

AU - Popescu, C. C.

AU - Smith, D. J. B.

AU - Taylor, E. N.

AU - Tuffs, R. J.

AU - van der Werf, P.

PY - 2016

Y1 - 2016

N2 - We compare common star formation rate (SFR) indicators in the local Universe in the Galaxy and Mass Assembly (GAMA) equatorial fields (~160 deg2), using ultraviolet (UV) photometry from GALEX, far-infrared and sub-millimetre (sub-mm) photometry from Herschel Astrophysical Terahertz Large Area Survey, and HÎ± spectroscopy from the GAMA survey. With a high-quality sample of 745 galaxies (median redshift ã€ˆzã€‰ = 0.08), we consider three SFR tracers: UV luminosity corrected for dust attenuation using the UV spectral slope Î² (SFRUV, corr), HÎ± line luminosity corrected for dust using the Balmer decrement (BD) (SFRHÎ±, corr), and the combination of UV and infrared (IR) emission (SFRUV + IR). We demonstrate that SFRUV, corr can be reconciled with the other two tracers after applying attenuation corrections by calibrating Infrared excess (IRX; i.e. the IR to UV luminosity ratio) and attenuation in the HÎ± (derived from BD) against Î². However, Î², on its own, is very unlikely to be a reliable attenuation indicator. We find that attenuation correction factors depend on parameters such as stellar mass (M*), z and dust temperature (Tdust), but not on HÎ± equivalent width or SÃƒÂƒÃ‚Â©rsic index. Due to the large scatter in the IRX versus Î² correlation, when compared to SFRUV + IR, the Î²-corrected SFRUV, corr exhibits systematic deviations as a function of IRX, BD and Tdust.

AB - We compare common star formation rate (SFR) indicators in the local Universe in the Galaxy and Mass Assembly (GAMA) equatorial fields (~160 deg2), using ultraviolet (UV) photometry from GALEX, far-infrared and sub-millimetre (sub-mm) photometry from Herschel Astrophysical Terahertz Large Area Survey, and HÎ± spectroscopy from the GAMA survey. With a high-quality sample of 745 galaxies (median redshift ã€ˆzã€‰ = 0.08), we consider three SFR tracers: UV luminosity corrected for dust attenuation using the UV spectral slope Î² (SFRUV, corr), HÎ± line luminosity corrected for dust using the Balmer decrement (BD) (SFRHÎ±, corr), and the combination of UV and infrared (IR) emission (SFRUV + IR). We demonstrate that SFRUV, corr can be reconciled with the other two tracers after applying attenuation corrections by calibrating Infrared excess (IRX; i.e. the IR to UV luminosity ratio) and attenuation in the HÎ± (derived from BD) against Î². However, Î², on its own, is very unlikely to be a reliable attenuation indicator. We find that attenuation correction factors depend on parameters such as stellar mass (M*), z and dust temperature (Tdust), but not on HÎ± equivalent width or SÃƒÂƒÃ‚Â©rsic index. Due to the large scatter in the IRX versus Î² correlation, when compared to SFRUV + IR, the Î²-corrected SFRUV, corr exhibits systematic deviations as a function of IRX, BD and Tdust.

UR - https://hdl.handle.net/1959.7/uws:66051

U2 - 10.1093/mnras/stw1450

DO - 10.1093/mnras/stw1450

M3 - Article

SN - 0035-8711

VL - 461

SP - 1898

EP - 1916

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

GAMA/H-ATLAS : common star formation rate indicators and their dependence on galaxy physical parameters

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