Dissecting Galaxy Colors with GALEX , SDSS, and Spitzer | Zendy

Bradley D. Johnson | Zendy; D. Schiminovich | Zendy; Mark Seibert | Zendy; M. Treyer | Zendy; S. Charlot | Zendy; Timothy M. Heckman | Zendy; D. Christopher Martin | Zendy; Samir Salim | Zendy; Guinevere Kauffmann | Zendy; L. Bianchi | Zendy; J. Donas | Zendy; Peter G. Friedman | Zendy; YoungWook Lee | Zendy; B. F. Madore | Zendy; B. Milliard | Zendy; Patrick Morrissey | Zendy; S. G. Neff | Zendy; R. Michael Rich | Zendy; Alexander S. Szalay | Zendy; Karl Förster | Zendy; Tom A. Barlow | Zendy; T. Conrow | Zendy; Todd Small | Zendy; Ted Wyder | Zendy

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Dissecting Galaxy Colors with GALEX , SDSS, and Spitzer

Author(s) -

Bradley D. Johnson,

D. Schiminovich,

Mark Seibert,

M. Treyer,

S. Charlot,

Timothy M. Heckman,

D. Christopher Martin,

Samir Salim,

Guinevere Kauffmann,

L. Bianchi,

J. Donas,

Peter G. Friedman,

YoungWook Lee,

B. F. Madore,

B. Milliard,

Patrick Morrissey,

S. G. Neff,

R. Michael Rich,

Alexander S. Szalay,

Karl Förster,

Tom A. Barlow,

T. Conrow,

Todd Small,

Ted Wyder

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505741

Subject(s) - galaxy , astrophysics , physics , star formation , sky , spitzer space telescope , galaxy formation and evolution , astronomy , infrared , james webb space telescope , luminous infrared galaxy , telescope

We combine data from SDSS and the GALEX and Spitzer observatories to create asample of galaxies observed homogeneously from the UV to the Far-IR. Thissample, consisting of ~460 galaxies observed spectroscopically by SDSS providesa multiwavelength (0.15-24 micron) view of obscured and unobscured starformation in nearby (z<0.3) galaxies with SFRs ranging from 0.01 to 100M_solar/yr. We calculate a robust dust measure from the infrared to UV ratio(IRX) and explore the influence of star formation history (SFH) on the dust-UVcolor relation (i.e. the IRX-beta relation). We find that the UV colors ofgalaxies are only weakly dependent on their SFH as measured by the 4000A break.However, we find that the contributions of dust and SFH are distinguishablewhen colors at widely separated wavelengths (e.g. 0.23-3.6 micron) areintroduced. We show this explicitly by recasting the IRX-beta relation as amore general IRX-SFH-color relation, which we examine in different projections.We also determine simple fits to this relation.Comment: 4 pages, 3 figures, accepted by ApJ Letter

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