Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies

H. R. Stacey; J. P. McKean; N. C. Robertson; R. J. Ivison; K. G. Isaak; D. R. G. Schleicher; P. P. van der Werf; W. A. Baan; A. Berciano Alba; M. A. Garrett; A. F. Loenen

doi:10.1093/mnras/sty458

Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies

H. R. Stacey^*, J. P. McKean, N. C. Robertson, R. J. Ivison, K. G. Isaak, D. R. G. Schleicher, P. P. van der Werf, W. A. Baan, A. Berciano Alba, M. A. Garrett, A. F. Loenen

^*Corresponding author for this work

Astronomy

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Abstract

We have observed 104 gravitationally lensed quasars at z similar to 1-4 with Herschel/SPIRE, the largest such sample ever studied. By targeting gravitational lenses, we probe intrinsic farinfrared (FIR) luminosities and star formation rates (SFRs) more typical of the population than the extremely luminous sources that are otherwise accessible. We detect 72 objects with Herschel/SPIRE and find 66 per cent (69 sources) of the sample have spectral energy distributions (SEDs) characteristic of dust emission. For 53 objects with sufficiently constrained SEDs, we find a median effective dust temperature of 38(-5)(+12) K. By applying the radioinfrared correlation, we find no evidence for an FIR excess that is consistent with starformation- heated dust. We derive a median magnification-corrected FIR luminosity of 3.6(-2.4)(+4.8) x 10(11) L circle dot and median SFR of 120(-80)(+160) M circle dot yr(-1) for 94 quasars with redshifts. We find similar to 10 per cent of our sample have FIR properties similar to typical dusty star-forming galaxies at z similar to 2-3 and a range of SFRs

Original language	English
Pages (from-to)	5075-5114
Number of pages	40
Journal	Monthly Notices of the Royal Astronomical Society
Volume	476
Issue number	4
DOIs	https://doi.org/10.1093/mnras/sty458
Publication status	Published - Jun-2018

Keywords

gravitational lensing: strong
galaxies: evolution
quasars: general
galaxies: star formation
infrared: galaxies
submillimetre: galaxies
DIGITAL SKY SURVEY
SPECTRAL ENERGY-DISTRIBUTION
ABSORPTION-LINE QUASAR
RADIO-QUIET QUASARS
NRAO PMN SURVEYS
5 GHZ SURVEY
ACTIVE GALACTIC NUCLEI
HIGH-REDSHIFT QUASARS
DENSE MOLECULAR GAS
MM MAMBO/IRAM-30 M

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Stacey, H. R., McKean, J. P., Robertson, N. C., Ivison, R. J., Isaak, K. G., Schleicher, D. R. G., van der Werf, P. P., Baan, W. A., Alba, A. B., Garrett, M. A., & Loenen, A. F. (2018). Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies. Monthly Notices of the Royal Astronomical Society, 476(4), 5075-5114. https://doi.org/10.1093/mnras/sty458

@article{ae7b5bac19b64fffa43b0dcb87037cbf,

title = "Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies",

abstract = "We have observed 104 gravitationally lensed quasars at z similar to 1-4 with Herschel/SPIRE, the largest such sample ever studied. By targeting gravitational lenses, we probe intrinsic farinfrared (FIR) luminosities and star formation rates (SFRs) more typical of the population than the extremely luminous sources that are otherwise accessible. We detect 72 objects with Herschel/SPIRE and find 66 per cent (69 sources) of the sample have spectral energy distributions (SEDs) characteristic of dust emission. For 53 objects with sufficiently constrained SEDs, we find a median effective dust temperature of 38(-5)(+12) K. By applying the radioinfrared correlation, we find no evidence for an FIR excess that is consistent with starformation- heated dust. We derive a median magnification-corrected FIR luminosity of 3.6(-2.4)(+4.8) x 10(11) L circle dot and median SFR of 120(-80)(+160) M circle dot yr(-1) for 94 quasars with redshifts. We find similar to 10 per cent of our sample have FIR properties similar to typical dusty star-forming galaxies at z similar to 2-3 and a range of SFRs",

keywords = "gravitational lensing: strong, galaxies: evolution, quasars: general, galaxies: star formation, infrared: galaxies, submillimetre: galaxies, DIGITAL SKY SURVEY, SPECTRAL ENERGY-DISTRIBUTION, ABSORPTION-LINE QUASAR, RADIO-QUIET QUASARS, NRAO PMN SURVEYS, 5 GHZ SURVEY, ACTIVE GALACTIC NUCLEI, HIGH-REDSHIFT QUASARS, DENSE MOLECULAR GAS, MM MAMBO/IRAM-30 M",

author = "Stacey, {H. R.} and McKean, {J. P.} and Robertson, {N. C.} and Ivison, {R. J.} and Isaak, {K. G.} and Schleicher, {D. R. G.} and {van der Werf}, {P. P.} and Baan, {W. A.} and Alba, {A. Berciano} and Garrett, {M. A.} and Loenen, {A. F.}",

year = "2018",

month = jun,

doi = "10.1093/mnras/sty458",

language = "English",

volume = "476",

pages = "5075--5114",

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

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

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TY - JOUR

T1 - Gravitational lensing reveals extreme dust-obscured star formation in quasar host galaxies

AU - Stacey, H. R.

AU - McKean, J. P.

AU - Robertson, N. C.

AU - Ivison, R. J.

AU - Isaak, K. G.

AU - Schleicher, D. R. G.

AU - van der Werf, P. P.

AU - Baan, W. A.

AU - Alba, A. Berciano

AU - Garrett, M. A.

AU - Loenen, A. F.

PY - 2018/6

Y1 - 2018/6

N2 - We have observed 104 gravitationally lensed quasars at z similar to 1-4 with Herschel/SPIRE, the largest such sample ever studied. By targeting gravitational lenses, we probe intrinsic farinfrared (FIR) luminosities and star formation rates (SFRs) more typical of the population than the extremely luminous sources that are otherwise accessible. We detect 72 objects with Herschel/SPIRE and find 66 per cent (69 sources) of the sample have spectral energy distributions (SEDs) characteristic of dust emission. For 53 objects with sufficiently constrained SEDs, we find a median effective dust temperature of 38(-5)(+12) K. By applying the radioinfrared correlation, we find no evidence for an FIR excess that is consistent with starformation- heated dust. We derive a median magnification-corrected FIR luminosity of 3.6(-2.4)(+4.8) x 10(11) L circle dot and median SFR of 120(-80)(+160) M circle dot yr(-1) for 94 quasars with redshifts. We find similar to 10 per cent of our sample have FIR properties similar to typical dusty star-forming galaxies at z similar to 2-3 and a range of SFRs

AB - We have observed 104 gravitationally lensed quasars at z similar to 1-4 with Herschel/SPIRE, the largest such sample ever studied. By targeting gravitational lenses, we probe intrinsic farinfrared (FIR) luminosities and star formation rates (SFRs) more typical of the population than the extremely luminous sources that are otherwise accessible. We detect 72 objects with Herschel/SPIRE and find 66 per cent (69 sources) of the sample have spectral energy distributions (SEDs) characteristic of dust emission. For 53 objects with sufficiently constrained SEDs, we find a median effective dust temperature of 38(-5)(+12) K. By applying the radioinfrared correlation, we find no evidence for an FIR excess that is consistent with starformation- heated dust. We derive a median magnification-corrected FIR luminosity of 3.6(-2.4)(+4.8) x 10(11) L circle dot and median SFR of 120(-80)(+160) M circle dot yr(-1) for 94 quasars with redshifts. We find similar to 10 per cent of our sample have FIR properties similar to typical dusty star-forming galaxies at z similar to 2-3 and a range of SFRs

KW - gravitational lensing: strong

KW - galaxies: evolution

KW - quasars: general

KW - galaxies: star formation

KW - infrared: galaxies

KW - submillimetre: galaxies

KW - DIGITAL SKY SURVEY

KW - SPECTRAL ENERGY-DISTRIBUTION

KW - ABSORPTION-LINE QUASAR

KW - RADIO-QUIET QUASARS

KW - NRAO PMN SURVEYS

KW - 5 GHZ SURVEY

KW - ACTIVE GALACTIC NUCLEI

KW - HIGH-REDSHIFT QUASARS

KW - DENSE MOLECULAR GAS

KW - MM MAMBO/IRAM-30 M

U2 - 10.1093/mnras/sty458

DO - 10.1093/mnras/sty458

M3 - Article

SN - 0035-8711

VL - 476

SP - 5075

EP - 5114

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -