Ultraviolet and far-infrared-selected star-forming galaxies at z = 0: Differences and overlaps

C. Kevin Xu, Veronique Buat, Jorge Iglesias-Páramo, Tsutomu T. Takeuchi, Tom A. Barlow, Luciana Bianchi, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Patrick N. Jelinsky, Young Wook Lee, Barry F. Madore, Roger F. Malina, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, R. Michael Rich, Susan G. Neff, David SchiminovichOswald H.W. Siegmund, Todd Small, Alex S. Szalay, Barry Y. Welsh, Ted K. Wyder, Sukyoung Yi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We study two samples of local galaxies, one UV (GALEX) selected and the other FIR (IRAS) selected, to address the question of whether UV and FIR surveys see two sides ("bright" and "dark") of the star formation of the same population of galaxies or two different populations of star-forming galaxies. No significant difference between the Ltot (=L60 + LFUV) luminosity functions of the UV and FIR samples is found. In addition, after the correction for the "Malmquist bias" (bias for flux-limited samples), the FIR-to-UV ratio versus Ltot relations of the two samples are consistent with each other. In the range of 9 ≲ log (Ltot/L) ≲ 12, both can be approximated by a simple linear relation of log (L60/LFUV) = log (L tot/L) - 9.66. These are consistent with the hypothesis that the two samples represent the same population of star-forming galaxies, and their well-documented differences in Ltot and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR-selected sample. The contribution from these "FIR-quiet" galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.c., the stellar mass functions) of the two samples do not show any significant difference.

Original languageEnglish
Pages (from-to)834-840
Number of pages7
JournalAstrophysical Journal
Volume646
Issue number2 I
DOIs
Publication statusPublished - 2006 Aug 1

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infrared stars
galaxies
luminosity
stars
Infrared Astronomy Satellite
extremely high frequencies
stellar mass
star formation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Xu, C. K., Buat, V., Iglesias-Páramo, J., Takeuchi, T. T., Barlow, T. A., Bianchi, L., ... Yi, S. (2006). Ultraviolet and far-infrared-selected star-forming galaxies at z = 0: Differences and overlaps. Astrophysical Journal, 646(2 I), 834-840. https://doi.org/10.1086/504974
Xu, C. Kevin ; Buat, Veronique ; Iglesias-Páramo, Jorge ; Takeuchi, Tsutomu T. ; Barlow, Tom A. ; Bianchi, Luciana ; Donas, Jose ; Forster, Karl ; Friedman, Peter G. ; Heckman, Timothy M. ; Jelinsky, Patrick N. ; Lee, Young Wook ; Madore, Barry F. ; Malina, Roger F. ; Martin, D. Christopher ; Milliard, Bruno ; Morrissey, Patrick ; Rich, R. Michael ; Neff, Susan G. ; Schiminovich, David ; Siegmund, Oswald H.W. ; Small, Todd ; Szalay, Alex S. ; Welsh, Barry Y. ; Wyder, Ted K. ; Yi, Sukyoung. / Ultraviolet and far-infrared-selected star-forming galaxies at z = 0 : Differences and overlaps. In: Astrophysical Journal. 2006 ; Vol. 646, No. 2 I. pp. 834-840.
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abstract = "We study two samples of local galaxies, one UV (GALEX) selected and the other FIR (IRAS) selected, to address the question of whether UV and FIR surveys see two sides ({"}bright{"} and {"}dark{"}) of the star formation of the same population of galaxies or two different populations of star-forming galaxies. No significant difference between the Ltot (=L60 + LFUV) luminosity functions of the UV and FIR samples is found. In addition, after the correction for the {"}Malmquist bias{"} (bias for flux-limited samples), the FIR-to-UV ratio versus Ltot relations of the two samples are consistent with each other. In the range of 9 ≲ log (Ltot/L⊙) ≲ 12, both can be approximated by a simple linear relation of log (L60/LFUV) = log (L tot/L⊙) - 9.66. These are consistent with the hypothesis that the two samples represent the same population of star-forming galaxies, and their well-documented differences in Ltot and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR-selected sample. The contribution from these {"}FIR-quiet{"} galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.c., the stellar mass functions) of the two samples do not show any significant difference.",
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Xu, CK, Buat, V, Iglesias-Páramo, J, Takeuchi, TT, Barlow, TA, Bianchi, L, Donas, J, Forster, K, Friedman, PG, Heckman, TM, Jelinsky, PN, Lee, YW, Madore, BF, Malina, RF, Martin, DC, Milliard, B, Morrissey, P, Rich, RM, Neff, SG, Schiminovich, D, Siegmund, OHW, Small, T, Szalay, AS, Welsh, BY, Wyder, TK & Yi, S 2006, 'Ultraviolet and far-infrared-selected star-forming galaxies at z = 0: Differences and overlaps', Astrophysical Journal, vol. 646, no. 2 I, pp. 834-840. https://doi.org/10.1086/504974

Ultraviolet and far-infrared-selected star-forming galaxies at z = 0 : Differences and overlaps. / Xu, C. Kevin; Buat, Veronique; Iglesias-Páramo, Jorge; Takeuchi, Tsutomu T.; Barlow, Tom A.; Bianchi, Luciana; Donas, Jose; Forster, Karl; Friedman, Peter G.; Heckman, Timothy M.; Jelinsky, Patrick N.; Lee, Young Wook; Madore, Barry F.; Malina, Roger F.; Martin, D. Christopher; Milliard, Bruno; Morrissey, Patrick; Rich, R. Michael; Neff, Susan G.; Schiminovich, David; Siegmund, Oswald H.W.; Small, Todd; Szalay, Alex S.; Welsh, Barry Y.; Wyder, Ted K.; Yi, Sukyoung.

In: Astrophysical Journal, Vol. 646, No. 2 I, 01.08.2006, p. 834-840.

Research output: Contribution to journalArticle

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T1 - Ultraviolet and far-infrared-selected star-forming galaxies at z = 0

T2 - Differences and overlaps

AU - Xu, C. Kevin

AU - Buat, Veronique

AU - Iglesias-Páramo, Jorge

AU - Takeuchi, Tsutomu T.

AU - Barlow, Tom A.

AU - Bianchi, Luciana

AU - Donas, Jose

AU - Forster, Karl

AU - Friedman, Peter G.

AU - Heckman, Timothy M.

AU - Jelinsky, Patrick N.

AU - Lee, Young Wook

AU - Madore, Barry F.

AU - Malina, Roger F.

AU - Martin, D. Christopher

AU - Milliard, Bruno

AU - Morrissey, Patrick

AU - Rich, R. Michael

AU - Neff, Susan G.

AU - Schiminovich, David

AU - Siegmund, Oswald H.W.

AU - Small, Todd

AU - Szalay, Alex S.

AU - Welsh, Barry Y.

AU - Wyder, Ted K.

AU - Yi, Sukyoung

PY - 2006/8/1

Y1 - 2006/8/1

N2 - We study two samples of local galaxies, one UV (GALEX) selected and the other FIR (IRAS) selected, to address the question of whether UV and FIR surveys see two sides ("bright" and "dark") of the star formation of the same population of galaxies or two different populations of star-forming galaxies. No significant difference between the Ltot (=L60 + LFUV) luminosity functions of the UV and FIR samples is found. In addition, after the correction for the "Malmquist bias" (bias for flux-limited samples), the FIR-to-UV ratio versus Ltot relations of the two samples are consistent with each other. In the range of 9 ≲ log (Ltot/L⊙) ≲ 12, both can be approximated by a simple linear relation of log (L60/LFUV) = log (L tot/L⊙) - 9.66. These are consistent with the hypothesis that the two samples represent the same population of star-forming galaxies, and their well-documented differences in Ltot and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR-selected sample. The contribution from these "FIR-quiet" galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.c., the stellar mass functions) of the two samples do not show any significant difference.

AB - We study two samples of local galaxies, one UV (GALEX) selected and the other FIR (IRAS) selected, to address the question of whether UV and FIR surveys see two sides ("bright" and "dark") of the star formation of the same population of galaxies or two different populations of star-forming galaxies. No significant difference between the Ltot (=L60 + LFUV) luminosity functions of the UV and FIR samples is found. In addition, after the correction for the "Malmquist bias" (bias for flux-limited samples), the FIR-to-UV ratio versus Ltot relations of the two samples are consistent with each other. In the range of 9 ≲ log (Ltot/L⊙) ≲ 12, both can be approximated by a simple linear relation of log (L60/LFUV) = log (L tot/L⊙) - 9.66. These are consistent with the hypothesis that the two samples represent the same population of star-forming galaxies, and their well-documented differences in Ltot and in FIR-to-UV ratio are due only to the selection effect. A comparison between the UV luminosity functions shows marginal evidence for a population of faint UV galaxies missing in the FIR-selected sample. The contribution from these "FIR-quiet" galaxies to the overall UV population is insignificant, given that the K-band luminosity functions (i.c., the stellar mass functions) of the two samples do not show any significant difference.

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Xu CK, Buat V, Iglesias-Páramo J, Takeuchi TT, Barlow TA, Bianchi L et al. Ultraviolet and far-infrared-selected star-forming galaxies at z = 0: Differences and overlaps. Astrophysical Journal. 2006 Aug 1;646(2 I):834-840. https://doi.org/10.1086/504974