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For refcode 2011A&A...534A.102L:
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2011A&A...534A.102L The AMIGA sample of isolated galaxies. IX. Molecular gas properties Lisenfeld, U.; Espada, D.; Verdes-Montenegro, L.; Kuno, N.; Leon, S.; Sabater, J.; Sato, N.; Sulentic, J.; Verley, S.; Yun, M. S. Abstract. Aims: We characterize the molecular gas content (ISM cold phase) using CO emission of a redshift-limited subsample of isolated galaxies from the AMIGA (Analysis of the interstellar Medium of Isolated GAlaxies) project in order to provide a comparison sample for studies of galaxies in different environments. Methods: We present the ^12^CO(1-0) data for 273 AMIGA galaxies, most of them (n = 186) from our own observations with the IRAM 30 m and the FCRAO 14 m telescopes and the rest from the literature. We constructed a redshift-limited sample containing galaxies with 1500 km s^-1^ < v < 5000 km s^-1^ and excluded objects with morphological evidence of possible interaction. This sample (n = 173) is the basis for our statistical analysis. It contains galaxies with molecular gas masses, M_H_2_, in the range of ~10^8^ - 10^10^ M_sun;_. It is dominated, both in absolute number and in detection rate, by spiral galaxies of type T = 3-5 (Sb-Sc). Most galaxies were observed with a single pointing towards their centers. Therefore, we performed an extrapolation to the total molecular gas mass expected in the entire disk based on the assumption of an exponential distribution. We then studied the relationships between M_H_2_ and other galactic properties (L_B_, D_25^2, L_K_, L_FIR_, and M_HI_). Results: We find correlations between M_H_2_ and L_B_, D_25^2, L_K_, and L_FIR_. The tightest correlation of M_H_2_ holds with L_FIR_ and, for T = 3-5, with L_K_, and the poorest with D_25^2. The correlations with L_FIR_ and L_K_ are very close to linearity. The correlation with L_B_ is nonlinear so that M_H_2_/L_B_ increases with L_B_. The molecular and the atomic gas masses of our sample show no strong correlation. We find a low mean value, log(M_H_2_/M_HI_) = -0.7 (for T = 3-5), and a strong decrease in this ratio with morphological type. The molecular gas column density and the surface density of the star formation rate (the Kennicutt-Schmidt law) show a tight correlation with a rough unity slope. We compare the relations of M_H_2_ with L_B_ and L_K_ found for AMIGA galaxies to samples of interacting galaxies from the literature and find an indication for an enhancement of the molecular gas in interacting galaxies of up to 0.2-0.3 dex. Key words: galaxies: evolution, galaxies: interactions, galaxies: ISM, radio lines: ISM, radio lines: galaxies, surveys =========================================================================== 2012A&A...538C...1L The AMIGA sample of isolated galaxies (Corrigendum). IX. Molecular gas properties [2011 A&A 534A 102] Lisenfeld, U.; Espada, D.; Verdes-Montenegro, L.; Kuno, N.; Leon, S.; Sabater, J.; Sato, N.; Sulentic, J.; Verley, S.; Yun, M. S. Abstract. We noticed two errors in our paper: (1) IN Eqs. (6) and (7) the units for L_IR_ and L_FIR_ should be erg s^-1^ (instead of erg yr^-1^). (2) In Table 8 there are some erroneous values for the means of the AMIGA sample (i.e. in Cols. 2 and 3). None of these errors affect the conclusions of the paper. Below we attach the correct version of the table. {see Table 8} Key words: galaxies: evolution, galaxies: ISM, galaxies: interactions, radio lines: ISM, radio lines: galaxies, errata, addenda ===========================================================================
Retrieve 273 NED objects in this reference.
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