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Evolution of H II regions in hierarchically structured molecular clouds

journal contribution
posted on 2023-05-16, 18:10 authored by Stanislav ShabalaStanislav Shabala, Simon EllingsenSimon Ellingsen, Kurtz, SE, Lawrence ForbesLawrence Forbes
We present observations of the H91α recombination line emission towards a sample of nine H II regions associated with 6.7-GHz methanol masers, and report arcsecond-scale emission around compact cores. We derive physical parameters for our sources, and find that although simple hydrostatic models of region evolution reproduce the observed region sizes, they significantly underestimate emission measures. We argue that these findings are consistent with young source ages in our sample, and can be explained by existence of density gradients in the ionized gas. © 2006 RAS.

Funding

Australian Research Council

History

Publication title

Monthly Notices of the Royal Astronomical Society

Volume

372

Pagination

457-466

ISSN

0035-8711

Department/School

School of Natural Sciences

Publisher

Blackwell Publishing Ltd

Place of publication

Oxford, England

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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