Masers: Precision probes of molecular gas
Language
en
Article de revue
This item was published in
Advances in Space Research. 2019-06p. Advances in Space Research, Available online 11 June 2019
Elsevier
English Abstract
Maser emission from water, methanol, silicon monoxide and other molecules can reach brightness temperatures K. Such observations can achieve sub-pc precision for discs around black holes or sub-au scale interactions in ...Read more >
Maser emission from water, methanol, silicon monoxide and other molecules can reach brightness temperatures K. Such observations can achieve sub-pc precision for discs around black holes or sub-au scale interactions in protostellar discs and the regions where evolved star winds reach escape velocity. Ultra-high resolution maser observations also provide photon statistics, for fundamental physics experiments. RadioAstron has shown the success – and limitations – of cm-wave maser observations on scales mas with sparse baseline coverage. ALMA, APEX and earlier single dish searches have found a wealth of mm and sub-mm masers, some of which probably also attain high brightness temperatures. Masers are ideal for high-resolution observations throughout the radio regime and we need to consider the current lessons for the best observational strategies to meet specific science cases.Read less <
Origin
Hal imported