A radio continuum study of the Magellanic Clouds

Filipović, Miroslav; Haynes, R. F.; White, Graeme L.; Jones, P. A.

doi:10.1051/aas:1998417

Cited by 95 publications

(118 citation statements)

References 58 publications

(85 reference statements)

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“…Filipovic et al (1998) used Parkes surveys to study the radio spectral index and luminosityy distribution of 34 confirmed and 24 probable LMC SNRs. Williams et al (1999a) were the first to study the X-ray morphology of all known LMC SNRs at that time.…”

Section: Literature Surveymentioning

confidence: 99%

The population of X-ray supernova remnants in the Large Magellanic Cloud

Maggi

Haberl

Kavanagh

et al. 2016

A&A

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Aims. We present a comprehensive X-ray study of the population of supernova remnants (SNRs) in the Large Magellanic Cloud (LMC). Using primarily XMM-Newton observations, we conduct a systematic spectral analysis of LMC SNRs to gain new insight into their evolution and the interplay with their host galaxy. Methods. We combined all the archival XMM-Newton observations of the LMC with those of our Very Large Programme LMC survey. We produced X-ray images and spectra of 51 SNRs, out of a list of 59 objects compiled from the literature and augmented with newly found objects. Using a careful modelling of the background, we consistently analysed all the X-ray spectra and measure temperatures, luminosities, and chemical compositions. The locations of SNRs are compared to the distributions of stars, cold gas, and warm gas in the LMC, and we investigated the connection between the SNRs and their local environment, characterised by various star formation histories. We tentatively typed all LMC SNRs, in order to constrain the ratio of core-collapse to type Ia SN rates in the LMC. We also compared the column densities derived from X-ray spectra to H i maps, thus probing the three-dimensional structure of the LMC. Results. This work provides the first homogeneous catalogue of the X-ray spectral properties of SNRs in the LMC. It offers a complete census of LMC remnants whose X-ray emission exhibits Fe K lines (13% of the sample), or reveals the contribution from hot supernova ejecta (39%), which both give clues to the progenitor types. The abundances of O, Ne, Mg, Si, and Fe in the hot phase of the LMC interstellar medium are found to be between 0.2 and 0.5 times the solar values with a lower abundance ratio [α/Fe] than in the Milky Way. The current ratio of core-collapse to type Ia SN rates in the LMC is constrained to N CC /N Ia = 1.35( +0.11 −0.24 ), which is lower than in local SN surveys and galaxy clusters. Our comparison of the X-ray luminosity functions of SNRs in Local Group galaxies (LMC, SMC, M31, and M33) reveals an intriguing excess of bright objects in the LMC. Finally, we confirm that 30 Doradus and the LMC Bar are offset from the main disc of the LMC to the far and near sides, respectively.

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Section: Literature Surveymentioning

confidence: 99%

The population of X-ray supernova remnants in the Large Magellanic Cloud

Maggi

Haberl

Kavanagh

et al. 2016

A&A

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156

205

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“…Note log−log scale. from SNR J0530-7007 was estimated to be α T = −0.85 ± 0.13, while the typical SNR spectral index is α = −0.5 ± 0.2 (Filipović et al 1998). This somewhat steeper spectral index would indicate a younger age despite its (large) size of 52 × 44 pc, suggesting it as an older (more evolved) SNR.…”

Section: Resultsmentioning

confidence: 99%

“…However, the environment in which the SNR evolves i.e. the interstellar medium (ISM) with its ambient magnetic field, will not only affect the radio spectral index observed but also the SNR's morphology, structure and behaviour (Filipović et al 1998).…”

Section: Introductionmentioning

confidence: 99%

“…A radio source designated 0531-701 was identified by at RA(J2000) = 5 h 30 m 38. s 19 and Dec(J2000) = -70 • 07 33 and classified as an SNR candidate in a survey with the Molonglo Observatory Synthesis Telescope (MOST). Filipović et al (1998) detected this source in the Parkes radio surveys of the Magellanic Clouds (MCs; λ = 6 cm and 3 cm) but due to a rather flat spectrum of α = −0.17 ± 0.24 and the survey's low resolution (Parkes Beam Sizes: 4. 9 at λ = 6 cm; 2.…”

Section: Introductionmentioning

confidence: 99%

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Multi-frequency study of supernova remnants in the Large Magellanic Cloud

Horta

Filipović

Bozzetto

et al. 2012

A&A

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Context. The supernova remnants (SNRs) known in the Large Magellanic Cloud (LMC) show a variety of morphological structures in the different wavelength bands. This variety is the product of the conditions in the surrounding medium with which the remnant interacts and the inherent circumstances of the supernova event itself. Aims. This paper performs a multi-frequency study of the LMC SNR J0530-7007 by combining Australia Telescope Compact Array (ATCA), Molonglo Observatory Synthesis Telescope (MOST), Röntgensatellit (ROSAT) and Magellanic Clouds Emission Line Survey (MCELS) observations. Methods. We analysed radio-continuum, X-ray and optical data and present a multi-wavelength morphological study of LMC SNR J0530-7007. Results. We find that this object has a shell-type morphology with a size of 215 × 180 (52 pc × 44 pc); a radio spectral index (α = −0.85 ± 0.13); with [S ii]/Hα > 0.4 in the optical; and the presence of non-thermal radio and X-ray emission. Conclusions. We confirmed this object as a bona-fide shell-type SNR which is probably a result of a Type Ia supernova.

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“…If X-ray radiation was detected from the intrinsic source, then it was classified as a SNR candidate since the violent explosions and shockwaves produced by a supernova are known to emit strong X-rays. Also, SNRs usually exhibit steeper spectral index of about α < −0.5 (Filipovic et al 1998). Sources emitting infrared radiation but no detectable X-rays were classified as H ii regions.…”

Section: Discrete Sources Within the Field Of Ngc 55mentioning

confidence: 99%

Radio-continuum study of the nearby Sculptor group Galaxies. Part 2: NGC 55 at λ=20, 13, 6 and 3 cm

O’Brien

Filipović

Crawford

et al. 2013

Astrophys Space Sci

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A series of new radio-continuum (λ=20, 13, 6 and 3 cm) mosaic images focused on the NGC 55 galactic system were produced using archived observational data from the Australia Telescope Compact Array. These new images are both very sensitive (down to rms=33 µJy) and feature high angular resolution (down to <4 ). Using these newly created images, 66 previously unidentified discrete sources are identified. Of these sources, 46 were classified as background sources, 11 as H ii regions and 6 as supernova remnant candidates. This relatively low number of SNR candidates detected coupled with the low number of large H ii regions is consistent with the estimated low star formation rate of the galaxy at 0.06M year −1 . Our spectral index map shows that the core of galaxy appears to have a shallow spectral index between α = −0.2 and −0.4. This indicates that the core of the galaxy is a region of high thermal radiation output.

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A radio continuum study of the Magellanic Clouds

Cited by 95 publications

References 58 publications

The population of X-ray supernova remnants in the Large Magellanic Cloud

The population of X-ray supernova remnants in the Large Magellanic Cloud

Multi-frequency study of supernova remnants in the Large Magellanic Cloud

Radio-continuum study of the nearby Sculptor group Galaxies. Part 2: NGC 55 at λ=20, 13, 6 and 3 cm

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