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dc.contributor.authorDoherty, M. J.
dc.contributor.authorGeach, J. E.
dc.contributor.authorIvison, R. J.
dc.contributor.authorMenten, K. M.
dc.contributor.authorJacob, A. M.
dc.contributor.authorForbrich, J.
dc.contributor.authorDye, S.
dc.date.accessioned2022-11-08T16:45:01Z
dc.date.available2022-11-08T16:45:01Z
dc.date.issued2022-09-23
dc.identifier.citationDoherty , M J , Geach , J E , Ivison , R J , Menten , K M , Jacob , A M , Forbrich , J & Dye , S 2022 , ' Ammonia in the interstellar medium of a starbursting disc at z=2.6 ' , Monthly Notices of the Royal Astronomical Society: Letters , vol. 517 , no. 1 , pp. L60-L64 . https://doi.org/10.1093/mnrasl/slac111
dc.identifier.issn1745-3925
dc.identifier.otherArXiv: http://arxiv.org/abs/2209.09268v1
dc.identifier.otherORCID: /0000-0001-8694-4966/work/122647056
dc.identifier.urihttp://hdl.handle.net/2299/25883
dc.description© 2022 The Authors. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1093/mnrasl/slac111
dc.description.abstractWe report the detection of the ground state rotational emission of ammonia, ortho-NH$_3$ $(J_K=1_0\rightarrow0_0)$ in a gravitationally lensed, intrinsically hyperluminous, star-bursting galaxy at $z=2.6$. The integrated line profile is consistent with other molecular and atomic emission lines which have resolved kinematics well-modelled by a 5 kpc-diametre rotating disc. This implies that the gas responsible for NH$_3$ emission is broadly tracing the global molecular reservoir, but likely distributed in pockets of high density ($n\gtrsim5\times10^4$ cm$^{-3}$). With a luminosity of $2.8\times10^{6}$ $L_\odot$, the NH$_3$ emission represents $2.5\times10^{-7}$ of the total infrared luminosity of the galaxy, comparable to the ratio observed in the Kleinmann-Low nebula in Orion and consistent with sites of massive star formation in the Milky Way. If $L_{\rm NH_3}/L_{\rm IR}$ serves as a proxy for the 'mode' of star formation, this hints that the nature of star formation in extreme starbursts in the early Universe is similar to that of Galactic star-forming regions, with a large fraction of the cold interstellar medium in this state, plausibly driven by a storm of violent disc instabilities in the gas-dominated disc. This supports the 'full of Orions' picture of star formation in the most extreme galaxies seen close to the peak epoch of stellar mass assembly.en
dc.format.extent835822
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society: Letters
dc.subjectastro-ph.GA
dc.titleAmmonia in the interstellar medium of a starbursting disc at z=2.6en
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionCentre of Data Innovation Research
dc.contributor.institutionCentre for Climate Change Research (C3R)
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttps://academic.oup.com/mnrasl/article/517/1/L60/6712731
rioxxterms.versionofrecord10.1093/mnrasl/slac111
rioxxterms.typeOther
herts.preservation.rarelyaccessedtrue


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