Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7088
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dc.contributor.authorFor, B Q-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorDwarakanath, K.S.-
dc.contributor.authorUdaya Shankar, N.-
dc.contributor.authorSrivani, K.S.-
dc.contributor.authorSubrahmanyan, Ravi-
dc.contributor.authorPrabu, T.-
dc.contributor.author+ 39 Co-authors-
dc.date.accessioned2018-12-03T18:09:20Z-
dc.date.available2018-12-03T18:09:20Z-
dc.date.issued2018-10-21-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2018, Vol. 480, p2743–2756en_US
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/7088-
dc.descriptionOpen Accessen_US
dc.description.abstractWe present the first low-frequency Murchison Widefield Array (MWA) radio continuum maps of the Magellanic Clouds (MCs), using mosaics from the GaLactic Extragalactic All-Sky MWA (GLEAM) survey. In this paper, we discuss the overall radio continuum morphology between 76 and 227 MHz and compare them with neutral hydrogen maps, 1.4 GHz continuum maps and optical images. Variation of diffuse emission is noticeable across the Large Magellanic Cloud (LMC) but absent across the bar of the Small Magellanic Cloud (SMC). We also measure the integrated flux densities and derive the spectral indices for the MCs. A double power-law model with fixed α1 = −0.1 fit between 19.7 MHz and 8.55 GHz yields α0 = −0.66 ± 0.08 for the LMC. A power-law model yields α85.5MHz8.55GHz=−0.82±0.03α8.55GHz85.5MHz=−0.82±0.03 for the SMC. The radio spectral index maps reveal distinctive flat and steep spectral indices for the H II regions and supernova remnants, respectively. We find strong correlation between H II regions and Hα emission. Using a new 150 MHz–Hα relation as a star formation rate indicator, we estimate global star formation rates of 0.068–0.161 M⊙ yr−1 and 0.021–0.050 M⊙ yr−1 for the LMC and SMC, respectively. Images in 20 frequency bands, and wideband averages are made available via the GLEAM virtual observatory server.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2018MNRAS.480.2743Fen_US
dc.relation.urihttps://doi.org/10.1093/mnras/sty1960en_US
dc.rights2018 The Author(s)en_US
dc.subjectradiation mechanismsen_US
dc.subjectnon-thermalen_US
dc.subjectradiation mechanismsen_US
dc.subjectthermalen_US
dc.subjectMagellanic Cloudsen_US
dc.subjectradio continuum: galaxiesen_US
dc.titleA multifrequency radio continuum study of the Magellanic Clouds – I. Overall structure and star formation ratesen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

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