FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1

I. G. Roseboom; A. Bunker; M. Sumiyoshi; L. Wang; G. Dalton; M. Akiyama; J. Bock; D. Bonfield; V. Buat; C. Casey; E. Chapin; D. L. Clements; A. Conley; E. Curtis-Lake; A. Cooray; J. S. Dunlop; D. Farrah; S. J. Ham; E. Ibar; F. Iwamuro; M. Kimura; I. Lewis; E. Macaulay; G. Magdis; T. Maihara; G. Marsden; T. Mauch; Y. Moritani; K. Ohta; S. J. Oliver; M. J. Page; B. Schulz; Douglas Scott; M. Symeonidis; N. Takato; N. Tamura; T. Totani; K. Yabe; M. Zemcov

doi:10.1111/j.1365-2966.2012.21777.x

FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1

I. G. Roseboom^*, A. Bunker, M. Sumiyoshi, L. Wang, G. Dalton, M. Akiyama, J. Bock, D. Bonfield, V. Buat, C. Casey, E. Chapin, D. L. Clements, A. Conley, E. Curtis-Lake, A. Cooray, J. S. Dunlop, D. Farrah, S. J. Ham, E. Ibar, F. IwamuroM. Kimura, I. Lewis, E. Macaulay, G. Magdis, T. Maihara, G. Marsden, T. Mauch, Y. Moritani, K. Ohta, S. J. Oliver, M. J. Page, B. Schulz, Douglas Scott, M. Symeonidis, N. Takato, N. Tamura, T. Totani, K. Yabe, M. Zemcov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We investigate the properties (e.g. star formation rate, dust attenuation, stellar mass and metallicity) of a sample of infrared (IR) luminous galaxies at z ~ 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range of 0.7 < z _phot < 1.8, which have been targeted in two pointings (0.5 deg ²) with FMOS. We find a modest success rate for emission-line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of 〈E(B - V)〉 = 0.51 ± 0.27 for 〈LIR〉 = 1012 L _⊙ sources at 〈z〉 = 1.36. By comparing star formation rates estimated from the IR and from the dust-uncorrected Ha line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ~ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected sources are indistinguishable from the local mass-metallicity relation. We also find a strong correlation between dust attenuation and metallicity, with the most metal-rich IR sources experiencing the largest levels of dust attenuation.

Original language	English
Pages (from-to)	1782-1792
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	426
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2966.2012.21777.x
Publication status	Published - 1 Nov 2012

Keywords

Galaxies: Evolution
Submillimetre:Galaxies

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10.1111/j.1365-2966.2012.21777.x

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Roseboom, I. G., Bunker, A., Sumiyoshi, M., Wang, L., Dalton, G., Akiyama, M., Bock, J., Bonfield, D., Buat, V., Casey, C., Chapin, E., Clements, D. L., Conley, A., Curtis-Lake, E., Cooray, A., Dunlop, J. S., Farrah, D., Ham, S. J., Ibar, E., ... Zemcov, M. (2012). FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1. Monthly Notices of the Royal Astronomical Society, 426(3), 1782-1792. https://doi.org/10.1111/j.1365-2966.2012.21777.x

@article{653f8bf5611d4b3f84a535740c52f9bc,

title = "FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1",

abstract = "We investigate the properties (e.g. star formation rate, dust attenuation, stellar mass and metallicity) of a sample of infrared (IR) luminous galaxies at z ~ 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range of 0.7 < z phot < 1.8, which have been targeted in two pointings (0.5 deg 2) with FMOS. We find a modest success rate for emission-line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of 〈E(B - V)〉 = 0.51 ± 0.27 for 〈LIR〉 = 1012 L ⊙ sources at 〈z〉 = 1.36. By comparing star formation rates estimated from the IR and from the dust-uncorrected Ha line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ~ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected sources are indistinguishable from the local mass-metallicity relation. We also find a strong correlation between dust attenuation and metallicity, with the most metal-rich IR sources experiencing the largest levels of dust attenuation.",

keywords = "Galaxies: Evolution, Submillimetre:Galaxies",

author = "Roseboom, {I. G.} and A. Bunker and M. Sumiyoshi and L. Wang and G. Dalton and M. Akiyama and J. Bock and D. Bonfield and V. Buat and C. Casey and E. Chapin and Clements, {D. L.} and A. Conley and E. Curtis-Lake and A. Cooray and Dunlop, {J. S.} and D. Farrah and Ham, {S. J.} and E. Ibar and F. Iwamuro and M. Kimura and I. Lewis and E. Macaulay and G. Magdis and T. Maihara and G. Marsden and T. Mauch and Y. Moritani and K. Ohta and Oliver, {S. J.} and Page, {M. J.} and B. Schulz and Douglas Scott and M. Symeonidis and N. Takato and N. Tamura and T. Totani and K. Yabe and M. Zemcov",

year = "2012",

month = nov,

day = "1",

doi = "10.1111/j.1365-2966.2012.21777.x",

language = "English",

volume = "426",

pages = "1782--1792",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Roseboom, IG, Bunker, A, Sumiyoshi, M, Wang, L, Dalton, G, Akiyama, M, Bock, J, Bonfield, D, Buat, V, Casey, C, Chapin, E, Clements, DL, Conley, A, Curtis-Lake, E, Cooray, A, Dunlop, JS, Farrah, D, Ham, SJ, Ibar, E, Iwamuro, F, Kimura, M, Lewis, I, Macaulay, E, Magdis, G, Maihara, T, Marsden, G, Mauch, T, Moritani, Y, Ohta, K, Oliver, SJ , Page, MJ, Schulz, B, Scott, D, Symeonidis, M, Takato, N, Tamura, N, Totani, T, Yabe, K & Zemcov, M 2012, 'FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1', Monthly Notices of the Royal Astronomical Society, vol. 426, no. 3, pp. 1782-1792. https://doi.org/10.1111/j.1365-2966.2012.21777.x

TY - JOUR

T1 - FMOS near-IR spectroscopy of herschel-selected galaxies

T2 - Star formation rates, metallicity and dust attenuation at z ~ 1

AU - Roseboom, I. G.

AU - Bunker, A.

AU - Sumiyoshi, M.

AU - Wang, L.

AU - Dalton, G.

AU - Akiyama, M.

AU - Bock, J.

AU - Bonfield, D.

AU - Buat, V.

AU - Casey, C.

AU - Chapin, E.

AU - Clements, D. L.

AU - Conley, A.

AU - Curtis-Lake, E.

AU - Cooray, A.

AU - Dunlop, J. S.

AU - Farrah, D.

AU - Ham, S. J.

AU - Ibar, E.

AU - Iwamuro, F.

AU - Kimura, M.

AU - Lewis, I.

AU - Macaulay, E.

AU - Magdis, G.

AU - Maihara, T.

AU - Marsden, G.

AU - Mauch, T.

AU - Moritani, Y.

AU - Ohta, K.

AU - Oliver, S. J.

AU - Page, M. J.

AU - Schulz, B.

AU - Scott, Douglas

AU - Symeonidis, M.

AU - Takato, N.

AU - Tamura, N.

AU - Totani, T.

AU - Yabe, K.

AU - Zemcov, M.

PY - 2012/11/1

Y1 - 2012/11/1

N2 - We investigate the properties (e.g. star formation rate, dust attenuation, stellar mass and metallicity) of a sample of infrared (IR) luminous galaxies at z ~ 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range of 0.7 < z phot < 1.8, which have been targeted in two pointings (0.5 deg 2) with FMOS. We find a modest success rate for emission-line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of 〈E(B - V)〉 = 0.51 ± 0.27 for 〈LIR〉 = 1012 L ⊙ sources at 〈z〉 = 1.36. By comparing star formation rates estimated from the IR and from the dust-uncorrected Ha line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ~ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected sources are indistinguishable from the local mass-metallicity relation. We also find a strong correlation between dust attenuation and metallicity, with the most metal-rich IR sources experiencing the largest levels of dust attenuation.

AB - We investigate the properties (e.g. star formation rate, dust attenuation, stellar mass and metallicity) of a sample of infrared (IR) luminous galaxies at z ~ 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range of 0.7 < z phot < 1.8, which have been targeted in two pointings (0.5 deg 2) with FMOS. We find a modest success rate for emission-line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of 〈E(B - V)〉 = 0.51 ± 0.27 for 〈LIR〉 = 1012 L ⊙ sources at 〈z〉 = 1.36. By comparing star formation rates estimated from the IR and from the dust-uncorrected Ha line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ~ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ~ 1 IR-selected sources are indistinguishable from the local mass-metallicity relation. We also find a strong correlation between dust attenuation and metallicity, with the most metal-rich IR sources experiencing the largest levels of dust attenuation.

KW - Galaxies: Evolution

KW - Submillimetre:Galaxies

UR - http://www.scopus.com/inward/record.url?scp=84867599843&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2012.21777.x

DO - 10.1111/j.1365-2966.2012.21777.x

M3 - Article

AN - SCOPUS:84867599843

SN - 0035-8711

VL - 426

SP - 1782

EP - 1792

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

FMOS near-IR spectroscopy of herschel-selected galaxies: Star formation rates, metallicity and dust attenuation at z ~ 1

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Keywords

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