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dc.contributor.authorGinsburg, A.
dc.contributor.authorHenkel, C.
dc.contributor.authorAo, Y.
dc.contributor.authorRiquelme, D.
dc.contributor.authorKauffmann, J.
dc.contributor.authorPillai, T.
dc.contributor.authorMills, E.~A.~C.
dc.contributor.authorRequena-Torres, M.~A.
dc.contributor.authorImmer, K.
dc.contributor.authorTesti, L.
dc.contributor.authorOtt, J.
dc.contributor.authorBally, J.
dc.contributor.authorBattersby, C.
dc.contributor.authorDarling, J.
dc.contributor.authorAalto, S.
dc.contributor.authorStanke, T.
dc.contributor.authorKendrew, S.
dc.contributor.authorKruijssen, J.~M.~D.
dc.contributor.authorLongmore, S.
dc.contributor.authorGuesten, R.
dc.contributor.authorMenten, K.~M.
dc.contributor.authorDale, James
dc.date.accessioned2017-06-28T10:54:05Z
dc.date.available2017-06-28T10:54:05Z
dc.date.issued2016-01-26
dc.identifier.citationGinsburg , A , Henkel , C , Ao , Y , Riquelme , D , Kauffmann , J , Pillai , T , Mills , E A C , Requena-Torres , M A , Immer , K , Testi , L , Ott , J , Bally , J , Battersby , C , Darling , J , Aalto , S , Stanke , T , Kendrew , S , Kruijssen , J M D , Longmore , S , Guesten , R , Menten , K M & Dale , J 2016 , ' Dense gas in the Galactic central molecular zone is warm and heated by turbulence ' , Astronomy & Astrophysics , vol. 586 , no. A50 , pp. A50 . https://doi.org/10.1051/0004-6361/201526100
dc.identifier.issn1432-0746
dc.identifier.otherPURE: 11150581
dc.identifier.otherPURE UUID: beab7e5d-7819-45f1-a337-004487e7ec17
dc.identifier.otherBibtex: urn:6ea4ecfe735db05007259d6bf2d19249
dc.identifier.otherScopus: 84956670559
dc.identifier.urihttp://hdl.handle.net/2299/18598
dc.descriptionAdam Ginsburg, et al., “Dense gas in the Galactic central molecular zone is warm and heated by turbulence”, Astronomy & Astrophysics, Vol. 586, January 2016. This version of record is available online at:https://www.aanda.org/articles/aa/abs/2016/02/aa26100-15/aa26100-15.html © ESO, 2016
dc.description.abstractContext. The Galactic center is the closest region where we can study star formation under extreme physical conditions like those in high-redshift galaxies. Aims. We measure the temperature of the dense gas in the central molecular zone (CMZ) and examine what drives it. Methods. We mapped the inner 300 pc of the CMZ in the temperature-sensitive J = 3–2 para-formaldehyde (p - H2CO) transitions. We used the 32,1−22,0/ 30,3−20,2 line ratio to determine the gas temperature in n ~ 104−105 cm-3 gas. We have produced temperature maps and cubes with 30′′ and 1 km s-1 resolution and published all data in FITS form. Results. Dense gas temperatures in the Galactic center range from ~60 K to >100 K in selected regions. The highest gas temperatures TG> 100 K are observed around the Sgr B2 cores, in the extended Sgr B2 cloud, the 20 km s-1 and 50 km s-1 clouds, and in “The Brick” (G0.253+0.016). We infer an upper limit on the cosmic ray ionization rate ζCR< 10-14s-1. Conclusions. The dense molecular gas temperature of the region around our Galactic center is similar to values found in the central regions of other galaxies, in particular starburst systems. The gas temperature is uniformly higher than the dust temperature, confirming that dust is a coolant in the dense gas. Turbulent heating can readily explain the observed temperatures given the observed line widths. Cosmic rays cannot explain the observed variation in gas temperatures, so CMZ dense gas temperatures are not dominated by cosmic ray heating. The gas temperatures previously observed to be high in the inner ~75 pc are confirmed to be high in the entire CMZ.en
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectGalaxy: center, ISM: molecules, ISM: structure, Galaxy: nucleus, cosmic rays, ISM: clouds
dc.titleDense gas in the Galactic central molecular zone is warm and heated by turbulenceen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2015-08-16
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201526100
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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