Show simple item record

dc.contributor.authorHeesen, V.
dc.contributor.authorBrinks, E.
dc.contributor.authorKrause, Martin
dc.contributor.authorHarwood, J.J.
dc.contributor.authorRau, U.
dc.contributor.authorRupen, M. P.
dc.contributor.authorHunter, D. A.
dc.contributor.authorChyzy, K.T.
dc.contributor.authorKitchener, Ben
dc.date.accessioned2014-12-01T09:44:33Z
dc.date.available2014-12-01T09:44:33Z
dc.date.issued2015-02-01
dc.identifier.citationHeesen , V , Brinks , E , Krause , M , Harwood , J J , Rau , U , Rupen , M P , Hunter , D A , Chyzy , K T & Kitchener , B 2015 , ' The non-thermal superbubble in IC 10 : the generation of cosmic ray electrons caught in the act ' , Monthly Notices of the Royal Astronomical Society: Letters , vol. 447 , no. 1 , pp. L1-L5 . https://doi.org/10.1093/mnrasl/slu168
dc.identifier.issn1745-3925
dc.identifier.otherPURE: 7789411
dc.identifier.otherPURE UUID: 93b8396d-3027-4085-87e0-5fd770b29928
dc.identifier.otherBibtex: urn:4a893305252dbecd998e7e43dc80ed6e
dc.identifier.otherScopus: 84925335071
dc.identifier.otherORCID: /0000-0002-7758-9699/work/30407797
dc.identifier.otherORCID: /0000-0003-0251-6126/work/62748326
dc.identifier.otherORCID: /0000-0002-9610-5629/work/63687356
dc.identifier.urihttp://hdl.handle.net/2299/14841
dc.description.abstractSuperbubbles are crucial for stellar feedback, with supposedly high (of the order of 10 per cent) thermalization rates. We combined multiband radio continuum observations from the Very Large Array (VLA) with Effelsberg data to study the non-thermal superbubble (NSB) in IC 10, a starburst dwarf irregular galaxy in the Local Group. Thermal emission was subtracted using a combination of Balmer Hα and VLA 32 GHz continuum maps. The bubble’s nonthermal spectrum between 1.5 and 8.8 GHz displays curvature and can be well fitted with a standard model of an ageing cosmic ray electron population. With a derived equipartition magnetic field strength of 44 ±8 μG, and measuring the radiation energy density from Spitzer MIPS maps as 5±1×10−11 erg cm−3, we determine, based on the spectral curvature, a spectral age of the bubble of 1.0 ± 0.3 Myr. Analysis of the LITTLE THINGS HI data cube shows an expanding HI hole with 100 pc diameter and a dynamical age of 3.8 ± 0.3 Myr, centred to within 16 pc on IC 10 X-1, a massive stellar mass black hole (M > 23 M⊙). The results are consistent with the expected evolution for a superbubble with a few massive stars, where a very energetic event like a Type Ic supernova/hypernova has taken place about 1 Myr ago. We discuss alternatives to this interpretationen
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society: Letters
dc.subjectAstrophysics - Astrophysics of Galaxies
dc.titleThe non-thermal superbubble in IC 10 : the generation of cosmic ray electrons caught in the acten
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnrasl/slu168
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record