SIMBAD references

2019A&A...628A..71H - Astronomy and Astrophysics, volume 628A, 71-71 (2019/8-1)

Molecular gas and dust properties of galaxies from the Great Observatories All-sky LIRG Survey.

HERRERO-ILLANA R., PRIVON G.C., EVANS A.S., DIAZ-SANTOS T., PEREZ-TORRES M.A., U V., ALBERDI A., IWASAWA K., ARMUS L., AALTO S., MAZZARELLA J., CHU J., SANDERS D.B., BARCOS-MUNOZ L., CHARMANDARIS V., LINDEN S.T., YOON I., FRAYER D.T., INAMI H., KIM D.-C., BORISH H.J., CONWAY J., MURPHY E.J., SONG Y., STIERWALT S. and SURACE J.

Abstract (from CDS):

We present IRAM-30 m Telescope 12CO and 13CO observations of a sample of 55 luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) in the local universe. This sample is a subset of the Great Observatory All-Sky LIRG Survey (GOALS), for which we use ancillary multi-wavelength data to better understand their interstellar medium and star formation properties. Fifty-three (96%) of the galaxies are detected in 12CO, and 29 (52%) are also detected in 13CO above a 3σ level. The median full width at zero intensity (FWZI) velocity of the CO line emission is 661km/s, and ∼54% of the galaxies show a multi-peak CO profile. Herschel photometric data is used to construct the far-IR spectral energy distribution of each galaxy, which are fit with a modified blackbody model that allows us to derive dust temperatures and masses, and infrared luminosities. We make the assumption that the gas-to-dust mass ratio of (U)LIRGs is comparable to local spiral galaxies with a similar stellar mass (i.e., gas/dust of mergers is comparable to their progenitors) to derive a CO-to-H2 conversion factor of <α> =1.8–0.8+1.3M/(K.(km/s).pc2); such a value is comparable to that derived for (U)LIRGs based on dynamical mass arguments. We derive gas depletion times of 400 - 600 Myr for the (U)LIRGs, compared to the 1.3Gyr for local spiral galaxies. Finally, we re-examine the relationship between the 12CO/13CO ratio and dust temperature, confirming a transition to elevated ratios in warmer systems.

Abstract Copyright: © ESO 2019

Journal keyword(s): ISM: molecules - galaxies: ISM - galaxies: active - galaxies: starburst - radio lines: galaxies

VizieR on-line data: <Available at CDS (J/A+A/628/A71): table1.dat sp/*>

Simbad objects: 57

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2021.03.05-03:15:23

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