The Detection of a Hot Molecular Core in the Extreme Outer Galaxy

Interstellar chemistry in low-metallicity environments is crucial to understand chemical processes in the past metal-poor universe. Recent studies of interstellar molecules in nearby low-metallicity galaxies have suggested that metallicity has a significant effect on the chemistry of star-forming co...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2021-12, Vol.922 (2), p.206
Main Authors: Shimonishi, Takashi, Izumi, Natsuko, Furuya, Kenji, Yasui, Chikako
Format: Article
Language:English
Subjects:
Abundance
Astrochemistry
Astrophysics
Chemical reactions
Complexity
Cores
Deuteration
Galaxies
Interstellar chemistry
Interstellar matter
Interstellar medium
Interstellar molecules
Magellanic clouds
Metallicity
Organic chemistry
Oxygen
Protostars
Radio telescopes
Silicon
Star & galaxy formation
Star formation
Stars & galaxies
Stellar jets
Submillimeter astronomy
Sulfur
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Interstellar chemistry in low-metallicity environments is crucial to understand chemical processes in the past metal-poor universe. Recent studies of interstellar molecules in nearby low-metallicity galaxies have suggested that metallicity has a significant effect on the chemistry of star-forming cores. Here we report the first detection of a hot molecular core in the extreme outer Galaxy, which is an excellent laboratory to study star formation and the interstellar medium in a Galactic low-metallicity environment. The target star-forming region, WB 89–789, is located at a galactocentric distance of 19 kpc. Our Atacama Large Millimeter/submillimeter Array observations in 241–246, 256–261, 337–341, and 349–353 GHz have detected a variety of carbon-, oxygen-, nitrogen-, sulfur-, and silicon-bearing species, including complex organic molecules (COMs) containing up to nine atoms, toward a warm (>100 K) and compact (
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ac289b