Dust Attenuation in the Nearby Universe: A Comparison between Galaxies Selected in the Ultraviolet and in the Far-Infrared | Zendy

V. Buat | Zendy; J. Iglésias-Páramo | Zendy; Mark Seibert | Zendy; D. Burgarella | Zendy; S. Charlot | Zendy; D. Christopher Martin | Zendy; C. K. Xu | Zendy; Timothy M. Heckman | Zendy; S. Boissier | Zendy; A. Boselli | Zendy; Tom A. Barlow | Zendy; L. Bianchi | Zendy; Y.I. Byun | Zendy; J. Donas | Zendy; Karl Förster | Zendy; Peter G. Friedman | Zendy; P. N. Jelinski | Zendy; Y.-W. Lee | Zendy; B. F. Madore | Zendy; Roger F. Malina | Zendy; B. Milliard | Zendy; P. Morissey | Zendy; S. G. Neff | Zendy; R. Michael Rich | Zendy; D. Schiminovitch | Zendy; O. Siegmund | Zendy; Todd Small | Zendy; Alexander S. Szalay | Zendy; Barry Y. Welsh | Zendy; Ted K. Wyder | Zendy

Open Access

Dust Attenuation in the Nearby Universe: A Comparison between Galaxies Selected in the Ultraviolet and in the Far-Infrared

Author(s) -

V. Buat,

J. Iglésias-Páramo,

Mark Seibert,

D. Burgarella,

S. Charlot,

D. Christopher Martin,

C. K. Xu,

Timothy M. Heckman,

S. Boissier,

A. Boselli,

Tom A. Barlow,

L. Bianchi,

Y.I. Byun,

J. Donas,

Karl Förster,

Peter G. Friedman,

P. N. Jelinski,

Y.-W. Lee,

B. F. Madore,

Roger F. Malina,

B. Milliard,

P. Morissey,

S. G. Neff,

R. Michael Rich,

D. Schiminovitch,

O. Siegmund,

Todd Small,

Alexander S. Szalay,

Barry Y. Welsh,

Ted K. Wyder

Publication year - 2005

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 - 10.1086/423241

Subject(s) - astrophysics , physics , galaxy , luminosity , attenuation , luminous infrared galaxy , far infrared , spiral galaxy , ultraviolet , sky , extinction (optical mineralogy) , astronomy , optics

We compare the dust attenuation properties of two samples of galaxies purelyselected in the near-ultraviolet (NUV) band (1750-2750 A, lambda_m = 2310 A)and in the far-infrared (FIR) at 60micron. These samples are built using theGALEX and IRAS sky surveys over ~600 square degrees. The NUV selected samplecontains 95 galaxies detected down to NUV=16mag (AB system). 83 galaxies inthis sample are spirals or irregulars and only two of them are not detected at60micron. The FIR selected sample is built from the IRAS PSCz catalog completedown to 0.6Jy. Among the 163 sources, we select 118 star forming galaxies wellmeasured by IRAS, all but 1 are detected in NUV and 14 galaxies are notdetected in the far-ultraviolet (FUV) band (1350-1750 A, lambda_m = 1530 A).The dust to ultraviolet (NUV and FUV) flux ratio is calibrated to estimate thedust attenuation at both wavelengths. The median value of the attenuation inNUV is found to be ~1 mag for the NUV selected sample versus ~2 mag for the FIRselected one. Within both samples, the dust attenuation is found to correlatewith the luminosity of the galaxies. Almost all the NUV selected galaxies and2/3 of the FIR selected sample exhibit a lower dust attenuation than thatexpected from the tight relation found previously for starburst galaxiesbetween the dust attenuation and the slope of the ultraviolet continuum. Thesituation is inverse for one third of the FIR selected galaxies: theirextinction is higher than that deduced from their FUV-NUV color and therelation valid for starbursts.Comment: This paper will be published as part of the Galaxy Evolution Explorer (GALEX) Astrophysical Journal Letters Special Issu

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