Correlations of Methyl Formate (CH3OCHO), Dimethyl Ether (CH3OCH3) and Ketene (H2CCO) in High-mass Star-forming Regions

Fuente: arXiv

Saved in:

Bibliographic Details
Main Authors:	Li, Chuanshou, Qin, Sheng-Li, Liu, Tie, Liu, Sheng-Yuan, Tang, Mengyao, Liu, Hong-Li, Chen, Li, Li, Xiaohu, Xu, Fengwei, Zhang, Tianwei, Liu, Meizhu, Shi, Hongqiong, Wu, Yuefang
Format:	Preprint
Published:	2024
Subjects:	Astrophysics of Galaxies
Online Access:	Acceder al recurso
Tags:	Add Tag No Tags, Be the first to tag this record!

_version_	1866914953427943424
author	Li, Chuanshou Qin, Sheng-Li Liu, Tie Liu, Sheng-Yuan Tang, Mengyao Liu, Hong-Li Chen, Li Li, Xiaohu Xu, Fengwei Zhang, Tianwei Liu, Meizhu Shi, Hongqiong Wu, Yuefang
author_facet	Li, Chuanshou Qin, Sheng-Li Liu, Tie Liu, Sheng-Yuan Tang, Mengyao Liu, Hong-Li Chen, Li Li, Xiaohu Xu, Fengwei Zhang, Tianwei Liu, Meizhu Shi, Hongqiong Wu, Yuefang
contents	We present high-spatial-resolution (0.7 to 1.0 arcsec) submillimeter observations of continuum and molecular lines of CH3OCHO, CH3OCH3, and H2CCO toward 11 high-mass star-forming regions using the Atacama Large Millimetre/submillimetre Array (ALMA). A total of 19 separate cores from 9 high-mass star-forming regions are found to be line-rich, including high-, intermediate-, and low-mass line-rich cores. The three molecules are detected in these line-rich cores. We map the emission of CH3OCHO, CH3OCH3, and H2CCO in 9 high-mass star-forming regions. The spatial distribution of the three molecules is very similar and concentrated in the areas of intense continuum emission. We also calculate the rotation temperatures, column densities, and abundances of CH3OCHO, CH3OCH3, and H2CCO under the local thermodynamic equilibrium (LTE) assumption. The abundances relative to H2 and CH3OH, and line widths of the three molecules are significantly correlated. The abundances relative to H2, temperatures and line widths of the three molecules tend to be higher in cores with higher mass and outflows detected. The possible chemical links of the three molecules are discussed.
format	Preprint
id	arxiv_https___arxiv_org_abs_2409_13192
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Correlations of Methyl Formate (CH3OCHO), Dimethyl Ether (CH3OCH3) and Ketene (H2CCO) in High-mass Star-forming Regions Li, Chuanshou Qin, Sheng-Li Liu, Tie Liu, Sheng-Yuan Tang, Mengyao Liu, Hong-Li Chen, Li Li, Xiaohu Xu, Fengwei Zhang, Tianwei Liu, Meizhu Shi, Hongqiong Wu, Yuefang Astrophysics of Galaxies We present high-spatial-resolution (0.7 to 1.0 arcsec) submillimeter observations of continuum and molecular lines of CH3OCHO, CH3OCH3, and H2CCO toward 11 high-mass star-forming regions using the Atacama Large Millimetre/submillimetre Array (ALMA). A total of 19 separate cores from 9 high-mass star-forming regions are found to be line-rich, including high-, intermediate-, and low-mass line-rich cores. The three molecules are detected in these line-rich cores. We map the emission of CH3OCHO, CH3OCH3, and H2CCO in 9 high-mass star-forming regions. The spatial distribution of the three molecules is very similar and concentrated in the areas of intense continuum emission. We also calculate the rotation temperatures, column densities, and abundances of CH3OCHO, CH3OCH3, and H2CCO under the local thermodynamic equilibrium (LTE) assumption. The abundances relative to H2 and CH3OH, and line widths of the three molecules are significantly correlated. The abundances relative to H2, temperatures and line widths of the three molecules tend to be higher in cores with higher mass and outflows detected. The possible chemical links of the three molecules are discussed.
title	Correlations of Methyl Formate (CH3OCHO), Dimethyl Ether (CH3OCH3) and Ketene (H2CCO) in High-mass Star-forming Regions
topic	Astrophysics of Galaxies
url	https://arxiv.org/abs/2409.13192