Gear, Walter Kieran ![]() ![]() |
Abstract
The authors report observations at 0.35, 0.8, 1.1 and 3.3 mm with almost identical beamsizes between 0.8 - 3.3 mm of a small sample of compact H II regions selected from the IRAS catalogue. They find (1) a mean long-wavelength emissivity law β = 1.75±0.20; (2) a short-wavelength emissivity law β ≤ 1; (3) the transition between the two regimes occurring at a wavelength somewhat longer than generally assumed; (4) a substantial contribution to the 3.3-mm fluxes from free-free emission.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Uncontrolled Keywords: | Astronomical Spectroscopy, Cosmic Dust, H Ii Regions, Hydrogen Clouds, Radio Sources (astronomy), Emission Spectra, Emissivity, Millimeter Waves, Nebulae, Submillimeter Waves |
Publisher: | Wiley-Blackwell |
ISSN: | 0035-8711 |
Last Modified: | 21 Oct 2022 09:26 |
URI: | https://orca.cardiff.ac.uk/id/eprint/36369 |
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