NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T22:30:08 PDT
Help | Comment | NED Home

For refcode 2016ApJ...825..128L:
Retrieve 66 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2016ApJ...825..128L Morphology and Molecular Gas Fractions of Local Luminous Infrared Galaxies as a Function of Infrared Luminosity and Merger Stage Larson, K. L.; Sanders, D. B.; Barnes, J. E.; Ishida, C. M.; Evans, A. S.; U, V.; Mazzarella, J. M.; Kim, D.-C.; Privon, G. C.; Mirabel, I. F.; Flewelling, H. A. 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_}\gt {10}^11.5^{L}_o_; however, below this luminosity threshold, minor mergers and secular processes dominate. Additionally, galaxies do not reach {L}_{IR_}\gt {10}^12.0^{L}_o_ until late in the merger process when both disks are near final coalescence. The mean MGF ({MGF} = {M}_{{{H_}}_2_}/({M}_*_+{M}_{{{H_}}_2_})) 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_). Key words: galaxies: evolution, galaxies: interactions, infrared: galaxies
Retrieve 66 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home