Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies

Details Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies

2011-02-08

arxiv.org/abs/1102.1571v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 20 figures, published in Astronomy and Astrophysics

Scientific paper

The nearby universe remains the best laboratory to understand physical properties of galaxies and is a reference for any comparison with high redshift observations. The all sky (or very large) surveys performed from the ultraviolet (UV) to the far-infrared (far-IR) gives us large datasets with a very large wavelength coverage to perform a reference study. We want to investigate dust attenuation characteristics as well as star formation rate (SFR) calibrations on a sample of nearby galaxies observed over 13 bands from 0.15 to 160 microns. A sample of 363 galaxies is built from the AKARI /FIS all sky survey cross-correlated with SDSS and GALEX surveys. Broad band spectral energy distributions are fitted with the CIGALE code optimized to analyze variations in dust attenuation curves and SFR measurements and based on an energetic budget between the stellar and dust emission. Our galaxy sample is primarily selected in far-IR and mostly constituted of massive, actively star forming galaxies. There is some evidence for a dust attenuation law slightly steeper than that used for starburst galaxies but we are unable to constrain the presence or not of a bump at 220 nm. We confirm that a time dependent dust attenuation is necessary to perform the best fits. Various calibrations of the dust attenuation in the UV as a function of UV-optical colours are discussed. A calibration of the current star formation rate combining UV and total IR emissions is proposed with an accurate estimation of dust heating by old stars: for the whole sample 17 % of the total dust luminosity is not related to the recent star formation

Affiliated with

Also associated with

No associations

Rating

Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral energy distributions of an AKARI-SDSS-GALEX sample of galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-502263