The BLAST 250 μm-selected galaxy population in GOODS-South

J. S. Dunlop, P. A R Ade, J. J. Bock, E. L. Chapin, M. Cirasuolo, K. E K Coppin, M. J. Devlin, M. Griffin, T. R. Greve, J. O. Gundersen, M. Halpern, P. C. Hargrave, D. H. Hughes, R. J. Ivison, J. Klein, A. Kovacs, G. Marsden, Philip Mauskopf, C. B. Netterfield, L. OlmiE. Pascale, G. Patanchon, M. Rex, D. Scott, C. Semisch, I. Smail, T. A. Targett, N. Thomas, M. D P Truch, C. Tucker, G. S. Tucker, M. P. Viero, F. Walter, J. L. Wardlow, A. Weiss, D. V. Wiebe

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We identify and investigate the nature of the 20 brightest 250 μm sources detected by the Balloon-borne Large Aperture Submillimetre Telescope (BLAST) within the central 150 arcmin2 of the Great Observatories Origins Deep Survey (GOODS) South field. Aided by the available deep VLA 1.4 GHz radio imaging, reaching S1.4 40-μJy (4α), we have identified radio counterparts for 17/20 of the 250 μm sources. The resulting enhanced positional accuracy of ≃1 arcsec has then allowed us to exploit the deep optical (Hubble Space Telescope), near-infrared (VLT) and mid-infrared (Spitzer) imaging of GOODS-South to establish secure galaxy counterparts for the 17 radio-identified sources, and plausible galaxy candidates for the three radio-unidentified sources. Confusion is a serious issue for this deep BLAST 250 μm survey, due to the large size of the beam. Nevertheless, we argue that our chosen counterparts are significant, and often dominant contributors to the measured BLAST flux densities. For all of these 20 galaxies we have been able to determine spectroscopic (eight) or photometric (12) redshifts. The result is the first near-complete redshift distribution for a deep 250 μm-selected galaxy sample. This reveals that 250 μm surveys reaching detection limits of ≃40 mJy have a median redshift z≃ 1, and contain not only low-redshift spirals/LIRGs, but also the extreme z≃ 2 dust-enshrouded starburst galaxies previously discovered at sub-millimetre wavelengths. Inspection of the LABOCA 870 μm imaging of GOODS-South yields detections of ≃1/3 of the proposed BLAST sources (all at z > 1.5), and reveals 250/870 μm flux-density ratios consistent with a standard 40 K modified blackbody fit with a dust emissivity index β= 1.5. Based on their Infrared Array Camera (IRAC) colours, we find that virtually all of the BLAST galaxy identifications appear better described as analogues of the M82 starburst galaxy, or Sc star-forming discs rather than highly obscured ULIRGs. This is perhaps as expected at low redshift, where the 250 μm BLAST selection function is biased towards spectral energy distributions which peak longward of λrest= 100 μm. However, it also appears largely true at z≃ 2.

Original languageEnglish (US)
Pages (from-to)2022-2050
Number of pages29
JournalMonthly Notices of the Royal Astronomical Society
Volume408
Issue number4
DOIs
StatePublished - Nov 2010
Externally publishedYes

Fingerprint

observatories
observatory
apertures
telescopes
galaxies
radio
starburst galaxies
dust
flux density
emissivity
confusion
balloons
spectral energy distribution
near infrared
Hubble Space Telescope
inspection
wavelength
cameras
analogs
color

Keywords

  • Galaxies: active
  • Galaxies: fundamental parameters
  • Galaxies: photometry
  • Galaxies: starburst
  • Infrared: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Dunlop, J. S., Ade, P. A. R., Bock, J. J., Chapin, E. L., Cirasuolo, M., Coppin, K. E. K., ... Wiebe, D. V. (2010). The BLAST 250 μm-selected galaxy population in GOODS-South. Monthly Notices of the Royal Astronomical Society, 408(4), 2022-2050. https://doi.org/10.1111/j.1365-2966.2010.17278.x

The BLAST 250 μm-selected galaxy population in GOODS-South. / Dunlop, J. S.; Ade, P. A R; Bock, J. J.; Chapin, E. L.; Cirasuolo, M.; Coppin, K. E K; Devlin, M. J.; Griffin, M.; Greve, T. R.; Gundersen, J. O.; Halpern, M.; Hargrave, P. C.; Hughes, D. H.; Ivison, R. J.; Klein, J.; Kovacs, A.; Marsden, G.; Mauskopf, Philip; Netterfield, C. B.; Olmi, L.; Pascale, E.; Patanchon, G.; Rex, M.; Scott, D.; Semisch, C.; Smail, I.; Targett, T. A.; Thomas, N.; Truch, M. D P; Tucker, C.; Tucker, G. S.; Viero, M. P.; Walter, F.; Wardlow, J. L.; Weiss, A.; Wiebe, D. V.

In: Monthly Notices of the Royal Astronomical Society, Vol. 408, No. 4, 11.2010, p. 2022-2050.

Research output: Contribution to journalArticle

Dunlop, JS, Ade, PAR, Bock, JJ, Chapin, EL, Cirasuolo, M, Coppin, KEK, Devlin, MJ, Griffin, M, Greve, TR, Gundersen, JO, Halpern, M, Hargrave, PC, Hughes, DH, Ivison, RJ, Klein, J, Kovacs, A, Marsden, G, Mauskopf, P, Netterfield, CB, Olmi, L, Pascale, E, Patanchon, G, Rex, M, Scott, D, Semisch, C, Smail, I, Targett, TA, Thomas, N, Truch, MDP, Tucker, C, Tucker, GS, Viero, MP, Walter, F, Wardlow, JL, Weiss, A & Wiebe, DV 2010, 'The BLAST 250 μm-selected galaxy population in GOODS-South', Monthly Notices of the Royal Astronomical Society, vol. 408, no. 4, pp. 2022-2050. https://doi.org/10.1111/j.1365-2966.2010.17278.x
Dunlop, J. S. ; Ade, P. A R ; Bock, J. J. ; Chapin, E. L. ; Cirasuolo, M. ; Coppin, K. E K ; Devlin, M. J. ; Griffin, M. ; Greve, T. R. ; Gundersen, J. O. ; Halpern, M. ; Hargrave, P. C. ; Hughes, D. H. ; Ivison, R. J. ; Klein, J. ; Kovacs, A. ; Marsden, G. ; Mauskopf, Philip ; Netterfield, C. B. ; Olmi, L. ; Pascale, E. ; Patanchon, G. ; Rex, M. ; Scott, D. ; Semisch, C. ; Smail, I. ; Targett, T. A. ; Thomas, N. ; Truch, M. D P ; Tucker, C. ; Tucker, G. S. ; Viero, M. P. ; Walter, F. ; Wardlow, J. L. ; Weiss, A. ; Wiebe, D. V. / The BLAST 250 μm-selected galaxy population in GOODS-South. In: Monthly Notices of the Royal Astronomical Society. 2010 ; Vol. 408, No. 4. pp. 2022-2050.
@article{37df51ea411647829e14bea16ce592f8,
title = "The BLAST 250 μm-selected galaxy population in GOODS-South",
abstract = "We identify and investigate the nature of the 20 brightest 250 μm sources detected by the Balloon-borne Large Aperture Submillimetre Telescope (BLAST) within the central 150 arcmin2 of the Great Observatories Origins Deep Survey (GOODS) South field. Aided by the available deep VLA 1.4 GHz radio imaging, reaching S1.4 40-μJy (4α), we have identified radio counterparts for 17/20 of the 250 μm sources. The resulting enhanced positional accuracy of ≃1 arcsec has then allowed us to exploit the deep optical (Hubble Space Telescope), near-infrared (VLT) and mid-infrared (Spitzer) imaging of GOODS-South to establish secure galaxy counterparts for the 17 radio-identified sources, and plausible galaxy candidates for the three radio-unidentified sources. Confusion is a serious issue for this deep BLAST 250 μm survey, due to the large size of the beam. Nevertheless, we argue that our chosen counterparts are significant, and often dominant contributors to the measured BLAST flux densities. For all of these 20 galaxies we have been able to determine spectroscopic (eight) or photometric (12) redshifts. The result is the first near-complete redshift distribution for a deep 250 μm-selected galaxy sample. This reveals that 250 μm surveys reaching detection limits of ≃40 mJy have a median redshift z≃ 1, and contain not only low-redshift spirals/LIRGs, but also the extreme z≃ 2 dust-enshrouded starburst galaxies previously discovered at sub-millimetre wavelengths. Inspection of the LABOCA 870 μm imaging of GOODS-South yields detections of ≃1/3 of the proposed BLAST sources (all at z > 1.5), and reveals 250/870 μm flux-density ratios consistent with a standard 40 K modified blackbody fit with a dust emissivity index β= 1.5. Based on their Infrared Array Camera (IRAC) colours, we find that virtually all of the BLAST galaxy identifications appear better described as analogues of the M82 starburst galaxy, or Sc star-forming discs rather than highly obscured ULIRGs. This is perhaps as expected at low redshift, where the 250 μm BLAST selection function is biased towards spectral energy distributions which peak longward of λrest= 100 μm. However, it also appears largely true at z≃ 2.",
keywords = "Galaxies: active, Galaxies: fundamental parameters, Galaxies: photometry, Galaxies: starburst, Infrared: galaxies",
author = "Dunlop, {J. S.} and Ade, {P. A R} and Bock, {J. J.} and Chapin, {E. L.} and M. Cirasuolo and Coppin, {K. E K} and Devlin, {M. J.} and M. Griffin and Greve, {T. R.} and Gundersen, {J. O.} and M. Halpern and Hargrave, {P. C.} and Hughes, {D. H.} and Ivison, {R. J.} and J. Klein and A. Kovacs and G. Marsden and Philip Mauskopf and Netterfield, {C. B.} and L. Olmi and E. Pascale and G. Patanchon and M. Rex and D. Scott and C. Semisch and I. Smail and Targett, {T. A.} and N. Thomas and Truch, {M. D P} and C. Tucker and Tucker, {G. S.} and Viero, {M. P.} and F. Walter and Wardlow, {J. L.} and A. Weiss and Wiebe, {D. V.}",
year = "2010",
month = "11",
doi = "10.1111/j.1365-2966.2010.17278.x",
language = "English (US)",
volume = "408",
pages = "2022--2050",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",

}

TY - JOUR

T1 - The BLAST 250 μm-selected galaxy population in GOODS-South

AU - Dunlop, J. S.

AU - Ade, P. A R

AU - Bock, J. J.

AU - Chapin, E. L.

AU - Cirasuolo, M.

AU - Coppin, K. E K

AU - Devlin, M. J.

AU - Griffin, M.

AU - Greve, T. R.

AU - Gundersen, J. O.

AU - Halpern, M.

AU - Hargrave, P. C.

AU - Hughes, D. H.

AU - Ivison, R. J.

AU - Klein, J.

AU - Kovacs, A.

AU - Marsden, G.

AU - Mauskopf, Philip

AU - Netterfield, C. B.

AU - Olmi, L.

AU - Pascale, E.

AU - Patanchon, G.

AU - Rex, M.

AU - Scott, D.

AU - Semisch, C.

AU - Smail, I.

AU - Targett, T. A.

AU - Thomas, N.

AU - Truch, M. D P

AU - Tucker, C.

AU - Tucker, G. S.

AU - Viero, M. P.

AU - Walter, F.

AU - Wardlow, J. L.

AU - Weiss, A.

AU - Wiebe, D. V.

PY - 2010/11

Y1 - 2010/11

N2 - We identify and investigate the nature of the 20 brightest 250 μm sources detected by the Balloon-borne Large Aperture Submillimetre Telescope (BLAST) within the central 150 arcmin2 of the Great Observatories Origins Deep Survey (GOODS) South field. Aided by the available deep VLA 1.4 GHz radio imaging, reaching S1.4 40-μJy (4α), we have identified radio counterparts for 17/20 of the 250 μm sources. The resulting enhanced positional accuracy of ≃1 arcsec has then allowed us to exploit the deep optical (Hubble Space Telescope), near-infrared (VLT) and mid-infrared (Spitzer) imaging of GOODS-South to establish secure galaxy counterparts for the 17 radio-identified sources, and plausible galaxy candidates for the three radio-unidentified sources. Confusion is a serious issue for this deep BLAST 250 μm survey, due to the large size of the beam. Nevertheless, we argue that our chosen counterparts are significant, and often dominant contributors to the measured BLAST flux densities. For all of these 20 galaxies we have been able to determine spectroscopic (eight) or photometric (12) redshifts. The result is the first near-complete redshift distribution for a deep 250 μm-selected galaxy sample. This reveals that 250 μm surveys reaching detection limits of ≃40 mJy have a median redshift z≃ 1, and contain not only low-redshift spirals/LIRGs, but also the extreme z≃ 2 dust-enshrouded starburst galaxies previously discovered at sub-millimetre wavelengths. Inspection of the LABOCA 870 μm imaging of GOODS-South yields detections of ≃1/3 of the proposed BLAST sources (all at z > 1.5), and reveals 250/870 μm flux-density ratios consistent with a standard 40 K modified blackbody fit with a dust emissivity index β= 1.5. Based on their Infrared Array Camera (IRAC) colours, we find that virtually all of the BLAST galaxy identifications appear better described as analogues of the M82 starburst galaxy, or Sc star-forming discs rather than highly obscured ULIRGs. This is perhaps as expected at low redshift, where the 250 μm BLAST selection function is biased towards spectral energy distributions which peak longward of λrest= 100 μm. However, it also appears largely true at z≃ 2.

AB - We identify and investigate the nature of the 20 brightest 250 μm sources detected by the Balloon-borne Large Aperture Submillimetre Telescope (BLAST) within the central 150 arcmin2 of the Great Observatories Origins Deep Survey (GOODS) South field. Aided by the available deep VLA 1.4 GHz radio imaging, reaching S1.4 40-μJy (4α), we have identified radio counterparts for 17/20 of the 250 μm sources. The resulting enhanced positional accuracy of ≃1 arcsec has then allowed us to exploit the deep optical (Hubble Space Telescope), near-infrared (VLT) and mid-infrared (Spitzer) imaging of GOODS-South to establish secure galaxy counterparts for the 17 radio-identified sources, and plausible galaxy candidates for the three radio-unidentified sources. Confusion is a serious issue for this deep BLAST 250 μm survey, due to the large size of the beam. Nevertheless, we argue that our chosen counterparts are significant, and often dominant contributors to the measured BLAST flux densities. For all of these 20 galaxies we have been able to determine spectroscopic (eight) or photometric (12) redshifts. The result is the first near-complete redshift distribution for a deep 250 μm-selected galaxy sample. This reveals that 250 μm surveys reaching detection limits of ≃40 mJy have a median redshift z≃ 1, and contain not only low-redshift spirals/LIRGs, but also the extreme z≃ 2 dust-enshrouded starburst galaxies previously discovered at sub-millimetre wavelengths. Inspection of the LABOCA 870 μm imaging of GOODS-South yields detections of ≃1/3 of the proposed BLAST sources (all at z > 1.5), and reveals 250/870 μm flux-density ratios consistent with a standard 40 K modified blackbody fit with a dust emissivity index β= 1.5. Based on their Infrared Array Camera (IRAC) colours, we find that virtually all of the BLAST galaxy identifications appear better described as analogues of the M82 starburst galaxy, or Sc star-forming discs rather than highly obscured ULIRGs. This is perhaps as expected at low redshift, where the 250 μm BLAST selection function is biased towards spectral energy distributions which peak longward of λrest= 100 μm. However, it also appears largely true at z≃ 2.

KW - Galaxies: active

KW - Galaxies: fundamental parameters

KW - Galaxies: photometry

KW - Galaxies: starburst

KW - Infrared: galaxies

UR - http://www.scopus.com/inward/record.url?scp=78049470288&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78049470288&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2010.17278.x

DO - 10.1111/j.1365-2966.2010.17278.x

M3 - Article

AN - SCOPUS:78049470288

VL - 408

SP - 2022

EP - 2050

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -