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TIMES I: a Systematic Observation in Multiple Molecular Lines Toward the Orion A and Ophiuchus Clouds

Authors :
Yao-Lun Yang
Mark H. Heyer
Seokho Lee
Youngung Lee
Yunhee Choi
Ken'ichi Tatematsu
Hyeong-Sik Yun
Jae-Hoon Jung
Stella S. R. Offner
Neal J. Evans
Hyunwoo Kang
Jeong-Eun Lee
Minho Choi
Brandt A. L. Gaches
Yong-Hee Lee
Jungyeon Cho
Chang-Hoon Lee
Giseon Baek
How-Huan Chen
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

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....b97ddff2037ca4d026b9bf525fd6b878
Full Text :
https://doi.org/10.48550/arxiv.2106.04111