SIMBAD references

2019ApJ...887..105C - Astrophys. J., 887, 105-105 (2019/December-2)

[C I](1-0) and [C I](2-1) in resolved local galaxies.

CROCKER A.F., PELLEGRINI E., SMITH J.-D.T., DRAINE B.T., WILSON C.D., WOLFIRE M., ARMUS L., BRINKS E., DALE D.A., GROVES B., HERRERA-CAMUS R., HUNT L.K., KENNICUTT R.C., MURPHY E.J., SANDSTROM K., SCHINNERER E., RIGOPOULOU D., ROSOLOWSKY E. and VAN DER WERF P.

Abstract (from CDS):

We present resolved [C I] line intensities of 18 nearby galaxies observed with the SPIRE FTS spectrometer on the Herschel Space Observatory. We use these data along with resolved CO line intensities from Jup = 1 to 7 to interpret what phase of the interstellar medium the [C I] lines trace within typical local galaxies. A tight, linear relation is found between the intensities of the CO(4-3) and [C I](2-1) lines; we hypothesize this is due to the similar upper level temperature of these two lines. We modeled the [C I] and CO line emission using large-velocity gradient models combined with an empirical template. According to this modeling, the [C I](1-0) line is clearly dominated by the low-excitation component. We determine [C I] to molecular mass conversion factors for both the [C I](1-0) and [C I](2-1) lines, with mean values of α_[C I](1-0)_ = 7.3 M K–1 km–1 s pc–2 and α_[C I](2-1)_ = 34 M K–1 km–1 s pc–2 with logarithmic root-mean-square spreads of 0.20 and 0.32 dex, respectively. The similar spread of α[CI](1–0) to αCO (derived using the CO(2-1) line) suggests that [C I](1-0) may be just as good a tracer of cold molecular gas as CO(2-1) in galaxies of this type. On the other hand, the wider spread of α_[C I](2-1)_ and the tight relation found between [C I](2-1) and CO(4-3) suggest that much of the [C I](2-1) emission may originate in warmer molecular gas.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): Interstellar atomic gas - Disk galaxies

Status at CDS : Associated data (images, light curves, etc...) being ingested in VizieR.

Simbad objects: 28

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2021.06.16-22:02:32

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