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Larson, K.L.; Sanders, D.B.; Barnes, J.E.; Ishida, C.M.; Evans, A.S.; Mazzarella, J.M.; Kim, D.-C.; Privon, G.C.; Mirabel, I.F.; Flewelling, H.A. "Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage" (2016) Astrophysical Journal. 825(2)
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Abstract:

We present a new, detailed analysis of the morphologies and molecular gas fractions (MGFs) for a complete sample of 65 local luminous infrared galaxies from Great Observatories All-Sky Luminous Infrared Galaxies (LIRG) Survey using high resolution I-band images from The Hubble Space Telescope, the University of Hawaii 2.2 m Telescope and the Pan-STARRS1 Survey. Our classification scheme includes single undisturbed galaxies, minor mergers, and major mergers, with the latter divided into five distinct stages from pre-first pericenter passage to final nuclear coalescence. We find that major mergers of molecular gas-rich spirals clearly play a major role for all sources with L IR > 10 11.5 L ⊙ ; however, below this luminosity threshold, minor mergers and secular processes dominate. Additionally, galaxies do not reach L IR > 10 12.0 L ⊙ until late in the merger process when both disks are near final coalescence. The mean MGF (MGF = M H2 /(M ∗ +M H2 )) for non-interacting and early-stage major merger LIRGs is 18 ± 2%, which increases to 33 ± 3%, for intermediate stage major merger LIRGs, consistent with the hypothesis that, during the early-mid stages of major mergers, most of the initial large reservoir of atomic gas (HI) at large galactocentric radii is swept inward where it is converted into molecular gas (H 2 ). © 2016. The American Astronomical Society. All rights reserved.

Registro:

Documento: Artículo
Título:Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage
Autor:Larson, K.L.; Sanders, D.B.; Barnes, J.E.; Ishida, C.M.; Evans, A.S.; Mazzarella, J.M.; Kim, D.-C.; Privon, G.C.; Mirabel, I.F.; Flewelling, H.A.
Filiación:University of Hawaii, Institute for Astronomy, 2680 Woodlawn Dr., Honolulu, HI 96822, United States
Infrared Processing and Analysis Center, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, United States
Research School of Astronomy and Astrophysics, Australian National University, Cotter Road, Weston Creek, ACT 2611, Australia
Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawa Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
Department of Physics and Astronomy, University of Hawaii at Hilo, Hilo, HI 96720-4091, United States
Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904, United States
National Radio Astronomy Observatory, Edgemont Road, Charlottesville, VA 22904, United States
Department of Physics and Astronomy, University of California, Riverside, 900 University Avenue, Riverside, CA 92521, United States
Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Santiago 22, 306, Chile
Instituto de Astronomía y Física Del Espacio, CONICET, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Laboratoire AIM, CEA/DSM/Irfu/Service d'Astrophysique, Centre de Saclay, Bât. 709, Gif-sur-Yvette Cedex, F-91191, France
Palabras clave:galaxies: evolution; galaxies: interactions; infrared: galaxies
Año:2016
Volumen:825
Número:2
DOI: http://dx.doi.org/10.3847/0004-637X/825/2/128
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v825_n2_p_Larson

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Citas:

---------- APA ----------
Larson, K.L., Sanders, D.B., Barnes, J.E., Ishida, C.M., Evans, A.S., Mazzarella, J.M., Kim, D.-C.,..., Flewelling, H.A. (2016) . Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage. Astrophysical Journal, 825(2).
http://dx.doi.org/10.3847/0004-637X/825/2/128
---------- CHICAGO ----------
Larson, K.L., Sanders, D.B., Barnes, J.E., Ishida, C.M., Evans, A.S., Mazzarella, J.M., et al. "Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage" . Astrophysical Journal 825, no. 2 (2016).
http://dx.doi.org/10.3847/0004-637X/825/2/128
---------- MLA ----------
Larson, K.L., Sanders, D.B., Barnes, J.E., Ishida, C.M., Evans, A.S., Mazzarella, J.M., et al. "Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage" . Astrophysical Journal, vol. 825, no. 2, 2016.
http://dx.doi.org/10.3847/0004-637X/825/2/128
---------- VANCOUVER ----------
Larson, K.L., Sanders, D.B., Barnes, J.E., Ishida, C.M., Evans, A.S., Mazzarella, J.M., et al. Morphology and molecular gas fractions of local luminous infrared galaxies as a function of infrared luminosity and merger stage. Astrophys. J. 2016;825(2).
http://dx.doi.org/10.3847/0004-637X/825/2/128