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dc.contributor.authorNowak, Katarzyna
dc.contributor.authorKrause, Martin G. H.
dc.contributor.authorSchaerer, Daniel
dc.date.accessioned2023-01-04T16:00:01Z
dc.date.available2023-01-04T16:00:01Z
dc.date.issued2022-09-11
dc.identifier.citationNowak , K , Krause , M G H & Schaerer , D 2022 , ' Could kilomasers pinpoint supermassive stars? ' , Monthly Notices of the Royal Astronomical Society , vol. 516 , no. 4 , pp. 5507-5520 . https://doi.org/10.1093/mnras/stac2547
dc.identifier.issn0035-8711
dc.identifier.otherArXiv: http://arxiv.org/abs/2209.02712v1
dc.identifier.otherORCID: /0000-0002-9610-5629/work/125979318
dc.identifier.urihttp://hdl.handle.net/2299/25981
dc.description© The Author(s) 2022. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/)
dc.description.abstractA strong nuclear kilomaser, W1, has been found in the nearby galaxy NGC 253, associated with a forming super star cluster. Kilomasers could arise from the accretion disc around supermassive stars (>10^3 Msun), hypothetical objects that have been proposed as polluters responsible for the chemical peculiarities in globular clusters. The supermassive stars would form via runaway collisions, simultaneously with the cluster. Their discs are perturbed by stellar flybys, inspiralling and colliding stars. This raises the question if an accretion disc would at all be able to survive in such a dynamic environment and mase water lines. We investigated what the predicted maser spectrum of such a disc would look like using 2D hydrodynamic simulations and compared this to the W1 kilomaser. We derived model maser spectra from the simulations by using a general maser model for appropriate disc temperatures. All our model discs survived. The model maser spectra for the most destructive case for the simulations of M = 1000 Msun are a reasonable match with the W1 kilomaser spectrum in terms of scaling, flux values and some of the signal trends. Details in the spectrum suggest that a star of a few 1000 Msun might fit even better, with 10,000 Msun clearly giving too large velocities. Our investigations thus support the hypothesis that kilomasers could pinpoint supermassive stars.en
dc.format.extent14
dc.format.extent1570913
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.SR
dc.subjectastro-ph.GA
dc.titleCould kilomasers pinpoint supermassive stars?en
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1093/mnras/stac2547
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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