SIMBAD references

2012ApJS..203....9U - Astrophys. J., Suppl. Ser., 203, 9 (2012/November-0)

Spectral energy distributions of local luminous and ultraluminous infrared galaxies.

U V., SANDERS D.B., MAZZARELLA J.M., EVANS A.S., HOWELL J.H., SURACE J.A., ARMUS L., IWASAWA K., KIM D.-C., CASEY C.M., VAVILKIN T., DUFAULT M., LARSON K.L., BARNES J.E., CHAN B.H.P., FRAYER D.T., HAAN S., INAMI H., ISHIDA C.M., KARTALTEPE J.S., MELBOURNE J.L. and PETRIC A.O.

Abstract (from CDS):

Luminous (LIRGs; log (LIR/L) = 11.00-11.99) and ultraluminous infrared galaxies (ULIRGs; log (LIR/L) = 12.00-12.99) are the most extreme star-forming galaxies in the universe. The local (U)LIRGs provide a unique opportunity to study their multi-wavelength properties in detail for comparison with their more numerous counterparts at high redshifts. We present common large aperture photometry at radio through X-ray wavelengths and spectral energy distributions (SEDs) for a sample of 53 nearby (z < 0.083) LIRGs and 11 ULIRGs spanning log (LIR/L) = 11.14-12.57 from the flux-limited (f_60 µm_> 5.24 Jy) Great Observatories All-sky LIRG Survey. The SEDs for all objects are similar in that they show a broad, thermal stellar peak (∼0.3-2 µm), and a dominant FIR (∼40-200 µm) thermal dust peak, where νLν(60 µm)/νLν(V) increases from ∼2 to 30 with increasing LIR. When normalized at IRAS 60 µm, the largest range in the luminosity ratio, R(λ) ≡ log[νLν(λ)/νL ν(60 µm)], observed over the full sample is seen in the hard X-rays (HX = 2-10 keV), where ΔRHX= 3.73 (HX = -3.10). A small range is found in the radio (1.4 GHz), ΔR_1.4 GHz_= 1.75, where the mean ratio is largest, ((1.4GHz = -5.81). Total infrared luminosities, LIR(8-1000 µm), dust temperatures, and dust masses were computed from fitting thermal dust emission modified blackbodies to the mid-infrared (MIR) through submillimeter SEDs. The new results reflect an overall ∼0.02 dex lower luminosity than the original IRAS values. Total stellar masses were computed by fitting stellar population synthesis models to the observed near-infrared (NIR) through ultraviolet (UV) SEDs. Mean stellar masses are found to be log (M{sstarf}/M) = 10.79±0.40. Star formation rates have been determined from the infrared (SFRIR∼ 45 M/yr) and from the monochromatic UV luminosities (SFRUV∼ 1.3 M/yr), respectively. Multi-wavelength active galactic nucleus (AGN) indicators have be used to select putative AGNs: About 60% of the ULIRGs would have been classified as an AGN by at least one of the selection criteria.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: interactions - galaxies: photometry - infrared: galaxies

Simbad objects: 83

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