University of Illinois Urbana-Champaign

An ALMA sub-arcsecond view of molecular gas in massive star-forming region G10.6-0.4

Law, Charles John

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1335513.pdf
3639.pdf

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https://hdl.handle.net/2142/104386

Description

Title
An ALMA sub-arcsecond view of molecular gas in massive star-forming region G10.6-0.4
Author(s)
Law, Charles John
Contributor(s)
  • Liu, Hauyu Baobab
  • Ho, Paul T.P.
  • Keto, Eric
  • Galván-Madrid, Roberto
  • Öberg, Karin I
  • Zhang, Qizhou
Issue Date
2019-06-19
Keyword(s)
Astrochemistry and astrobiology in the age of Atacama Large Millimeter/submillimeter Array (ALMA)
Date of Ingest
  • 2019-07-15T22:16:49Z
  • 2020-01-25T19:30:45Z
Abstract
While massive star-forming regions are known to exhibit an extremely rich and diverse chemistry, few such sources have been mapped at high spatial resolution. Since the chemical structure of these sources displays substantial spatial variation among species on small scales (${\sim}10^4$~AU), high spatial resolution observations are needed to constrain chemical evolution models of massive star formation. We will present new ALMA 1.3 mm observations toward massive OB cluster-forming region G10.6-0.4 at a resolution of 0.12$^{\prime \prime}$ (600 AU). While the kinematics of G10.6 have been extensively studied at centimeter wavelengths, sensitive and high angular resolution observations in the millimeter and submillimeter regime have been lacking. Given the high sensitivity and bandwidth of our ALMA observations, we are able to derive rotational temperature and column density maps toward the central 8$^{\prime \prime}$ by 8$^{\prime \prime}$ region of G10.6 for over 10 different species, including traditional warm gas tracers such as CH$_3$CN, shock tracers HNCO and SiO, and a variety of complex organic molecules. Combined with our simultaneous observations of ionized gas in hydrogen recombination lines, our exquisite spatial resolution allows us to constrain the chemical influences of massive stellar feedback in the form of highly structured and inhomogeneous molecular emission, prominent spatial anti-correlations between molecular and ionized gas, and order-of-magnitude variations in physical gas conditions.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/104386
DOI
https://doi.org/10.15278/isms.2019.WG03
Copyright and License Information
Copyright 2019 Charles John Law

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Abstracts & Presentations - 2019 International Symposium on Molecular Spectroscopy PRIMARY