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dc.contributor.authorBillington, S. J.
dc.contributor.authorUrquhart, J. S.
dc.contributor.authorKönig, C.
dc.contributor.authorBeuther, H.
dc.contributor.authorBreen, S. L.
dc.contributor.authorMenten, K. M.
dc.contributor.authorCampbell-White, J.
dc.contributor.authorEllingsen, S. P.
dc.contributor.authorThompson, M. A.
dc.contributor.authorMoore, T. J. T.
dc.contributor.authorEden, D. J.
dc.contributor.authorKim, W. -J.
dc.contributor.authorLeurini, S.
dc.date.accessioned2021-02-03T12:30:02Z
dc.date.available2021-02-03T12:30:02Z
dc.date.issued2020-09-29
dc.identifier.citationBillington , S J , Urquhart , J S , König , C , Beuther , H , Breen , S L , Menten , K M , Campbell-White , J , Ellingsen , S P , Thompson , M A , Moore , T J T , Eden , D J , Kim , W -J & Leurini , S 2020 , ' ATLASGAL -- Relationship between dense star forming clumps and interstellar masers ' , Monthly Notices of the Royal Astronomical Society , vol. 499 , no. 2 . https://doi.org/10.1093/mnras/staa2936
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 24537031
dc.identifier.otherPURE UUID: 08a69dfb-563e-4ca6-817b-a246c03a8cda
dc.identifier.otherArXiv: http://arxiv.org/abs/2009.14608v1
dc.identifier.otherScopus: 85096940242
dc.identifier.otherORCID: /0000-0001-5392-909X/work/88209226
dc.identifier.urihttp://hdl.handle.net/2299/23840
dc.descriptionAccepted for publication in the Monthly Notices of the Royal Astronomical Society, 17 pages, 14 figures, 5 tables
dc.description.abstractWe have used catalogues from several Galactic plane surveys and dedicated observations to investigate the relationship between various maser species and Galactic star forming clumps, as identified by the ATLASGAL survey. The maser transitions of interest are the 6.7 & 12.2 GHz methanol masers, 22.2 GHz water masers, and the masers emitting in the four ground-state hyperfine structure transitions of hydroxyl. We find clump association rates for the water, hydroxyl and methanol masers to be 56, 39 and 82 per cent respectively, within the Galactic longitude range of 60{\deg} > $l$ > -60{\deg}. We investigate the differences in physical parameters between maser associated clumps and the full ATLASGAL sample, and find that clumps coincident with maser emission are more compact with increased densities and luminosities. However, we find the physical conditions within the clumps are similar for the different maser species. A volume density threshold of $n$(H$_{2}$) > 10$^{4.1}$ cm$^{-3}$ for the 6.7 GHz methanol maser found in our previous study is shown to be consistent across for all maser species investigated. We find limits that are required for the production of maser emission to be 500 L$_{\odot}$ and 6 M$_{\odot}$ respectively. The evolutionary phase of maser associated clumps is investigated using the L/M ratio of clumps coincident with maser emission, and these have similar L/M ranges (~10$^{0.2}$ - 10$^{2.7}$ L$_{\odot}$/M$_{\odot}$) regardless of the associated transitions. This implies that the conditions required for the production of maser emission only occur during a relatively narrow period during a star's evolution. Lower limits of the statistical lifetimes for each maser species are derived, ranging from ~0.4 - 2 x 10$^{4}$ yrs and are in good agreement with the "straw man" evolutionary model previously presented.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.GA
dc.titleATLASGAL -- Relationship between dense star forming clumps and interstellar masersen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionPhysics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/staa2936
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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