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TIMES I: a Systematic Observation in Multiple Molecular Lines Toward the Orion A and Ophiuchus Clouds
- Publication Year :
- 2021
- Publisher :
- arXiv, 2021.
-
Abstract
- We have used the Taeduk Radio Astronomy Observatory to observe the Orion A and Ophiuchus clouds in the $J=$1$-$0 lines of $^{13}$CO, C$^{18}$O, HCN, HCO$^+$, and N$_2$H$^+$ and the $J=$2$-$1 line of CS. The fully sampled maps with uniform noise levels are used to create moment maps. The variations of the line intensity and velocity dispersion with total column density, derived from dust emission maps, are presented and compared to previous work. The CS line traces dust column density over more than one order of magnitude, and the N$_2$H$^+$ line best traces the highest column density regime ($\log(N_\mathrm{H_2}$) $>$ 22.8). Line luminosities, integrated over the cloud, are compared to those seen in other galaxies. The HCO$^+$-to-HCN luminosity ratio in the Orion A cloud is similar to that of starburst galaxies, while that in the Ophiuchus cloud is in between those of active galactic nuclei and starburst galaxies.<br />62 pages, 53 figures, 6 tables, accepted for publication in ApJS
- Subjects :
- Physics
Active galactic nucleus
Molecular cloud
Velocity dispersion
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics - Astrophysics of Galaxies
Galaxy
Luminosity
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Ophiuchus
Astrophysics::Solar and Stellar Astrophysics
Noise (radio)
Astrophysics::Galaxy Astrophysics
Line (formation)
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....b97ddff2037ca4d026b9bf525fd6b878
- Full Text :
- https://doi.org/10.48550/arxiv.2106.04111