Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-10-22
Astrophys.J.692:556-573,2009
Astronomy and Astrophysics
Astrophysics
Accepted by ApJ. Revised in proof to strengthen caveats about the extrapolation of these IR templates above L(TIR)>2e12, witho
Scientific paper
10.1088/0004-637X/692/1/556
We show that measures of star formation rates (SFRs) for infrared galaxies using either single-band 24 um or extinction-corrected Paschen-alpha luminosities are consistent in the total infrared luminosity = L(TIR) ~ 10^10 L_sun range. MIPS 24 micron photometry can yield star formation rates accurately from this luminosity upward: SFR(M_sun/yr) = 7.8 x 10^-10 L(24 um, L_sun) from L(TIR) = 5 x 10^9 L_sun to 10^11 L_sun, and SFR = 7.8 x 10^-10 L(24 um, L_sun) x (7.76 x 10^-11 L(24))^0.048 for higher L(TIR). For galaxies with L(TIR) >= 10^10 L_sun, these new expressions should provide SFRs to within 0.2 dex. For L(TIR) >= 10^11 L_sun, we find that the SFR of infrared galaxies is significantly underestimated using extinction-corrected Pa-alpha (and presumably using any other optical or near infrared recombination lines). As a part of this work, we constructed spectral energy distribution (SED) templates for eleven luminous and ultraluminous purely star forming infrared galaxies (LIRGs and ULIRGs) and over the spectral range 0.4 microns to 30 cm. We use these templates and the SINGS data to construct average templates from 5 microns to 30 cm for infrared galaxies with L(TIR) = 5 x 10^9 to 10^13 L_sun. All of these templates are made available on line.
Alonso-Herrero Almudena
Blaylock Myra
Donley Jennifer L.
Marcillac Delphine
Perez-Gonzalez Pablo. G.
No associations
LandOfFree
Determining Star Formation Rates for Infrared 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 Determining Star Formation Rates for Infrared Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determining Star Formation Rates for Infrared Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-679847