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Title: SPECTRAL ENERGY DISTRIBUTIONS OF LOCAL LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES

Abstract

Luminous (LIRGs; log (L{sub IR}/L{sub Sun }) = 11.00-11.99) and ultraluminous infrared galaxies (ULIRGs; log (L{sub IR}/L{sub Sun }) = 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 (L{sub IR}/L{sub Sun }) = 11.14-12.57 from the flux-limited (f{sub 60{mu}m} > 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 ({approx}0.3-2 {mu}m), and a dominant FIR ({approx}40-200 {mu}m) thermal dust peak, where {nu}L{sub {nu}}(60 {mu}m)/{nu}L{sub {nu}}(V) increases from {approx}2 to 30 with increasing L{sub IR}. When normalized at IRAS 60 {mu}m, the largest range in the luminosity ratio, R({lambda}) {identical_to} log[{nu}L{sub {nu}}({lambda})/{nu}L{sub {nu}}(60 {mu}m)], observed over the full sample is seen in the hard X-rays (HX = 2-10 keV), where {Delta}R{sub HX} = 3.73 (R-bar{sub HX}= -3.10). A small range is found in the radio (1.4 GHz), {Delta}R{sub 1.4GHz} =more » 1.75, where the mean ratio is largest, (R-bar{sub 1.4GHz}= -5.81). Total infrared luminosities, L{sub IR}(8-1000 {mu}m), 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 {approx}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{sub *}/M{sub Sun }) = 10.79 {+-} 0.40. Star formation rates have been determined from the infrared (SFR{sub IR} {approx} 45 M{sub Sun} yr{sup -1}) and from the monochromatic UV luminosities (SFR{sub UV} {approx} 1.3 M{sub Sun} yr{sup -1}), 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.« less

Authors:
; ; ; ; ;  [1]; ; ;  [2]; ;  [3]; ;  [4];  [5];  [6];  [7];  [8];  [9]; ;  [10] more »; « less
  1. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)
  2. Infrared Processing and Analysis Center, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States)
  3. Department of Astronomy, University of Virginia, 530 McCormick Road, Charlottesville, VA 22904 (United States)
  4. Spitzer Science Center, 1200 E. California Blvd., MS 314-6, California Institute of Technology, Pasadena, CA 91125 (United States)
  5. ICREA and Institut del Ciencies del Cosmos, Universitat de Barcelona (IEEC-UB), Marti i Franques, 1, E-08028 Barcelona (Spain)
  6. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States)
  7. Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06511 (United States)
  8. National Radio Astronomy Observatory, P.O. Box 2, Green Bank, WV 24944 (United States)
  9. CSIRO Astronomy and Space Science, Marsfield NSW, 2122 (Australia)
  10. National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719 (United States)
Publication Date:
OSTI Identifier:
22089800
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal, Supplement Series
Additional Journal Information:
Journal Volume: 203; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0067-0049
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; COMPARATIVE EVALUATIONS; DUSTS; ENERGY SPECTRA; GALAXIES; GHZ RANGE; HARD X RADIATION; KEV RANGE; LUMINOSITY; MASS; MONOCHROMATIC RADIATION; PHOTOMETRY; RED SHIFT; STARS; ULTRAVIOLET RADIATION; UNIVERSE

Citation Formats

Vivian, U., Sanders, D. B., Casey, C. M., Larson, K. L., Barnes, J. E., Ishida, C. M., Mazzarella, J. M., Howell, J. H., Chan, B. H. P., Evans, A. S., Kim, D.-C., Surace, J. A., Armus, L., Iwasawa, K., Vavilkin, T., Dufault, M., Frayer, D. T., Haan, S., Inami, H., Kartaltepe, J. S., E-mail: vivian@ifa.hawaii.edu, and and others. SPECTRAL ENERGY DISTRIBUTIONS OF LOCAL LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES. United States: N. p., 2012. Web. doi:10.1088/0067-0049/203/1/9.
Vivian, U., Sanders, D. B., Casey, C. M., Larson, K. L., Barnes, J. E., Ishida, C. M., Mazzarella, J. M., Howell, J. H., Chan, B. H. P., Evans, A. S., Kim, D.-C., Surace, J. A., Armus, L., Iwasawa, K., Vavilkin, T., Dufault, M., Frayer, D. T., Haan, S., Inami, H., Kartaltepe, J. S., E-mail: vivian@ifa.hawaii.edu, & and others. SPECTRAL ENERGY DISTRIBUTIONS OF LOCAL LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES. United States. doi:10.1088/0067-0049/203/1/9.
Vivian, U., Sanders, D. B., Casey, C. M., Larson, K. L., Barnes, J. E., Ishida, C. M., Mazzarella, J. M., Howell, J. H., Chan, B. H. P., Evans, A. S., Kim, D.-C., Surace, J. A., Armus, L., Iwasawa, K., Vavilkin, T., Dufault, M., Frayer, D. T., Haan, S., Inami, H., Kartaltepe, J. S., E-mail: vivian@ifa.hawaii.edu, and and others. Thu . "SPECTRAL ENERGY DISTRIBUTIONS OF LOCAL LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES". United States. doi:10.1088/0067-0049/203/1/9.
@article{osti_22089800,
title = {SPECTRAL ENERGY DISTRIBUTIONS OF LOCAL LUMINOUS AND ULTRALUMINOUS INFRARED GALAXIES},
author = {Vivian, U. and Sanders, D. B. and Casey, C. M. and Larson, K. L. and Barnes, J. E. and Ishida, C. M. and Mazzarella, J. M. and Howell, J. H. and Chan, B. H. P. and Evans, A. S. and Kim, D.-C. and Surace, J. A. and Armus, L. and Iwasawa, K. and Vavilkin, T. and Dufault, M. and Frayer, D. T. and Haan, S. and Inami, H. and Kartaltepe, J. S., E-mail: vivian@ifa.hawaii.edu and and others},
abstractNote = {Luminous (LIRGs; log (L{sub IR}/L{sub Sun }) = 11.00-11.99) and ultraluminous infrared galaxies (ULIRGs; log (L{sub IR}/L{sub Sun }) = 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 (L{sub IR}/L{sub Sun }) = 11.14-12.57 from the flux-limited (f{sub 60{mu}m} > 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 ({approx}0.3-2 {mu}m), and a dominant FIR ({approx}40-200 {mu}m) thermal dust peak, where {nu}L{sub {nu}}(60 {mu}m)/{nu}L{sub {nu}}(V) increases from {approx}2 to 30 with increasing L{sub IR}. When normalized at IRAS 60 {mu}m, the largest range in the luminosity ratio, R({lambda}) {identical_to} log[{nu}L{sub {nu}}({lambda})/{nu}L{sub {nu}}(60 {mu}m)], observed over the full sample is seen in the hard X-rays (HX = 2-10 keV), where {Delta}R{sub HX} = 3.73 (R-bar{sub HX}= -3.10). A small range is found in the radio (1.4 GHz), {Delta}R{sub 1.4GHz} = 1.75, where the mean ratio is largest, (R-bar{sub 1.4GHz}= -5.81). Total infrared luminosities, L{sub IR}(8-1000 {mu}m), 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 {approx}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{sub *}/M{sub Sun }) = 10.79 {+-} 0.40. Star formation rates have been determined from the infrared (SFR{sub IR} {approx} 45 M{sub Sun} yr{sup -1}) and from the monochromatic UV luminosities (SFR{sub UV} {approx} 1.3 M{sub Sun} yr{sup -1}), 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.},
doi = {10.1088/0067-0049/203/1/9},
journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 1,
volume = 203,
place = {United States},
year = {2012},
month = {11}
}