Dissecting Galaxy colors with Galex, SDSS, and Spitzer

B. D. Johnson, D. Schiminovich, M. Seibert, M. A. Treyer, S. Charlot, T. M. Heckman, D. C. Martin, S. Salim, G. Kauffmann, L. Bianchi, J. Donas, P. G. Friedman, Young-Wook Lee, B. F. Madore, B. Milliard, P. Morrissey, S. G. Neff, R. M. Rich, A. S. Szalay, K. ForsterT. A. Barlow, T. Conrow, T. Small, T. K. Wyder

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We combine data from the Sloan Digital Sky Survey (SDSS), the Galaxy Evolution Explorer (GALEX), and the Spitzer Space Telescope to create a sample of galaxies observed homogeneously from the UV to the far-IR. This sample, consisting of ∼460 galaxies observed spectroscopically by the SDSS, provides us with a multiwavelength (0.15-24 mm) view of obscured and unobscured star formation in nearby (z ≤ 0.3) galaxies with star formation rates (SFRs) ranging from 0.01 to 100 M·yr-1. We calculate a robust dust measure from the infraredto-UV ratio (or infrared excess [IRX]) and explore the influence of star formation history (SFH) on the dust-UV color relation (i.e., the IRX-β relation). We find that the UV colors of galaxies are only weakly dependent on their SFH as measured by the 4000 break. However, we find that the contributions of dust and SFH are distinguishable when colors at widely separated wavelengths (e.g., 0.23-3.6 mm) are introduced. We show this explicitly by recasting the IRX-b relation as a more general IRX-SFH-color relation, which we examine in different projections. We also determine simple fits to this relation.

Original languageEnglish
Pages (from-to)L109-L112
JournalAstrophysical Journal Letters
Volume644
Issue number2
DOIs
Publication statusPublished - 2006 Jun 20

Fingerprint

star formation
galaxies
color
histories
history
dust
infrared stars
Space Infrared Telescope Facility
star formation rate
wavelength
projection
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Johnson, B. D., Schiminovich, D., Seibert, M., Treyer, M. A., Charlot, S., Heckman, T. M., ... Wyder, T. K. (2006). Dissecting Galaxy colors with Galex, SDSS, and Spitzer. Astrophysical Journal Letters, 644(2), L109-L112. https://doi.org/10.1086/505741
Johnson, B. D. ; Schiminovich, D. ; Seibert, M. ; Treyer, M. A. ; Charlot, S. ; Heckman, T. M. ; Martin, D. C. ; Salim, S. ; Kauffmann, G. ; Bianchi, L. ; Donas, J. ; Friedman, P. G. ; Lee, Young-Wook ; Madore, B. F. ; Milliard, B. ; Morrissey, P. ; Neff, S. G. ; Rich, R. M. ; Szalay, A. S. ; Forster, K. ; Barlow, T. A. ; Conrow, T. ; Small, T. ; Wyder, T. K. / Dissecting Galaxy colors with Galex, SDSS, and Spitzer. In: Astrophysical Journal Letters. 2006 ; Vol. 644, No. 2. pp. L109-L112.
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Johnson, BD, Schiminovich, D, Seibert, M, Treyer, MA, Charlot, S, Heckman, TM, Martin, DC, Salim, S, Kauffmann, G, Bianchi, L, Donas, J, Friedman, PG, Lee, Y-W, Madore, BF, Milliard, B, Morrissey, P, Neff, SG, Rich, RM, Szalay, AS, Forster, K, Barlow, TA, Conrow, T, Small, T & Wyder, TK 2006, 'Dissecting Galaxy colors with Galex, SDSS, and Spitzer', Astrophysical Journal Letters, vol. 644, no. 2, pp. L109-L112. https://doi.org/10.1086/505741

Dissecting Galaxy colors with Galex, SDSS, and Spitzer. / Johnson, B. D.; Schiminovich, D.; Seibert, M.; Treyer, M. A.; Charlot, S.; Heckman, T. M.; Martin, D. C.; Salim, S.; Kauffmann, G.; Bianchi, L.; Donas, J.; Friedman, P. G.; Lee, Young-Wook; Madore, B. F.; Milliard, B.; Morrissey, P.; Neff, S. G.; Rich, R. M.; Szalay, A. S.; Forster, K.; Barlow, T. A.; Conrow, T.; Small, T.; Wyder, T. K.

In: Astrophysical Journal Letters, Vol. 644, No. 2, 20.06.2006, p. L109-L112.

Research output: Contribution to journalArticle

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T1 - Dissecting Galaxy colors with Galex, SDSS, and Spitzer

AU - Johnson, B. D.

AU - Schiminovich, D.

AU - Seibert, M.

AU - Treyer, M. A.

AU - Charlot, S.

AU - Heckman, T. M.

AU - Martin, D. C.

AU - Salim, S.

AU - Kauffmann, G.

AU - Bianchi, L.

AU - Donas, J.

AU - Friedman, P. G.

AU - Lee, Young-Wook

AU - Madore, B. F.

AU - Milliard, B.

AU - Morrissey, P.

AU - Neff, S. G.

AU - Rich, R. M.

AU - Szalay, A. S.

AU - Forster, K.

AU - Barlow, T. A.

AU - Conrow, T.

AU - Small, T.

AU - Wyder, T. K.

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Y1 - 2006/6/20

N2 - We combine data from the Sloan Digital Sky Survey (SDSS), the Galaxy Evolution Explorer (GALEX), and the Spitzer Space Telescope to create a sample of galaxies observed homogeneously from the UV to the far-IR. This sample, consisting of ∼460 galaxies observed spectroscopically by the SDSS, provides us with a multiwavelength (0.15-24 mm) view of obscured and unobscured star formation in nearby (z ≤ 0.3) galaxies with star formation rates (SFRs) ranging from 0.01 to 100 M·yr-1. We calculate a robust dust measure from the infraredto-UV ratio (or infrared excess [IRX]) and explore the influence of star formation history (SFH) on the dust-UV color relation (i.e., the IRX-β relation). We find that the UV colors of galaxies are only weakly dependent on their SFH as measured by the 4000 break. However, we find that the contributions of dust and SFH are distinguishable when colors at widely separated wavelengths (e.g., 0.23-3.6 mm) are introduced. We show this explicitly by recasting the IRX-b relation as a more general IRX-SFH-color relation, which we examine in different projections. We also determine simple fits to this relation.

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Johnson BD, Schiminovich D, Seibert M, Treyer MA, Charlot S, Heckman TM et al. Dissecting Galaxy colors with Galex, SDSS, and Spitzer. Astrophysical Journal Letters. 2006 Jun 20;644(2):L109-L112. https://doi.org/10.1086/505741