A New Look at Radio Supernova Remnants

Mills, Sean R.; Turtle, A. J.; Little, A. G.; Durdin, JM

doi:10.1071/ph840321

Cited by 114 publications

(107 citation statements)

References 3 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…Mathewson et al (1983) provided a catalogue of 25 SNRs with radio, optical, and X-ray results. With more observations, Mills et al (1984) and Mathewson et al (1984Mathewson et al ( , 1985 increased the size of the sample to 32. In the 1990s, several new SNRs were discovered with ROSAT pointed observations (Chu et al 1993(Chu et al , 2000Smith et al 1994), sometimes aided by optical spectroscopy (Chu et al 1995(Chu et al , 1997.…”

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

149

205

View full text Add to dashboard Cite

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.

show abstract

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

149

205

View full text Add to dashboard Cite

show abstract

“…For the 36 cm Molonglo Synthesis Telescope (MOST) flux density measurement given in Table 2 we used unpublished images as described by Mills et al (1984), and for the 20 cm we used image from Hughes et al (2007). The Australia Telescope Compact Array (ATCA) project C634 (at 6/3 cm) observations were combined with mosaic observations from project C918 (Dickel et al 2005).…”

Section: Radio-continuum Datamentioning

confidence: 99%

“…For the final image (Stokes parameter I) we excluded baselines created with the 6th ATCA antenna, leaving Notes. The flux density was estimated using images from Mills et al (1984) at λ = 36 cm and from Hughes et al (2007) at λ = 20 cm.…”

Section: Radio-continuum Datamentioning

confidence: 99%

Multi-frequency study of DEM L299 in the Large Magellanic Cloud

Warth

Sasaki

Kavanagh

et al. 2014

A&A

View full text Add to dashboard Cite

Aims. We have studied the H ii region DEM L299 in the Large Magellanic Cloud (LMC) to understand its physical characteristics and morphology in different wavelengths. Methods. We performed a spectral analysis of archived XMM-Newton EPIC data and studied the morphology of DEM L299 in X-ray, optical, and radio wavelengths. We used Hα, [S ii], and [O iii] data from the Magellanic Cloud Emission Line Survey (MCELS) and radio 21 cm line data from the Australia Telescope Compact Array (ATCA) and the Parkes Telescope as well as radio continuum data (3 cm, 6 cm, 20 cm, 36 cm) from ATCA and from the Molonglo Synthesis Telescope (MOST). Results. Our morphological studies imply that, in addition to the supernova remnant SNR B0543-68.9 reported in previous studies, a superbubble also overlaps the SNR in projection. The position of the SNR is clearly defined through the [S ii]/Hα flux ratio image.Moreover, the optical images show a shell-like structure that is located farther to the north and is filled with diffuse X-ray emission, which again indicates the superbubble. Radio 21 cm line data show a shell around both objects. Radio continuum data show diffuse emission at the position of DEM L299, which appears clearly distinguished from the H ii region LHA 120-N 164 that lies south-west of it. We determined the spectral index of SNR B0543-68.9 to be α = −0.34, which indicates the dominance of thermal emission and therefore a rather mature remnant. We determined the basic properties of the diffuse X-ray emission for the SNR, the superbubble, and a possible blowout region of the bubble, as suggested by the optical and X-ray data. We obtained an age of (8.9 +9.2 −5.4 ) kyr for the SNR and a temperature of (0.64 +0.73 −0.20 ) keV for the hot gas inside the SNR, as well as a thermal energy content and temperature of the hot gas inside the superbubble of (4.3 +8.1 −2.6 ) × 10 50 φ 0.5 erg and (0.74 +0.36 −0.30 ) keV, with φ being the gas-filling factor. Conclusions. We conclude that DEM L299 consists of a superposition of SNR B0543-68.9 and a superbubble, which we identified based on optical data.

show abstract

“…The 36 cm (843 MHz) measurements come from the Molonglo Synthesis Telescope (MOST; as described in Mills et al 1984) and Sydney University Molonglo Sky Survey (SUMMS; Mauch et al 2008) mosaic images. These 36 cm surveys are from two different sets of observations and we point that the MOST data comes with somewhat better uv coverage and sensitivity.…”

Section: Observations and Reductionmentioning

confidence: 99%

“…Mathewson et al (1983) find an optical size of 162 ′′ ×129 ′′ and an X-ray size of ∼120 ′′ , an integrated flux density at 408 MHz of 130 mJy and a radio spectral index of α = −0.53. Mills et al (1984) recorded an integrated flux density measurement at 843 MHz of 850 mJy, updating the spectral index to α = −0.52. They also note a horseshoe morphology for which they state that approximately one third of SNRs greater than 30 ′′ are.…”

Section: Introductionmentioning

confidence: 99%

Radio-continuum study of MCSNR J0536–7038 (DEM L249)

Bozzetto¹,

Filipović²

2014

Astrophys Space Sci

View full text Add to dashboard Cite

We present a detailed radio-continuum study on Australia Telescope Compact Array (ATCA) observations of Large Magellanic Cloud (LMC) supernova remnant (SNR), MCSNR J0536-7038. This Type Ia SNR follows a horseshoe morphology, with a size 32 pc × 32 pc (1-pc uncertainty in each direction). It exhibits a radio spectrum α = −0.52 ± 0.07 between λ = 73 and 6 cm. We report detections of regions showing moderately high fractional polarisation at 6 cm, with a peak value of 71±25% and a mean fractional polarisation of 35±8%. We also estimate an average rotation measure across the remnant of -237 rad m −2 . The intrinsic magnetic field appears to be uniformly distributed, extending in the direction of the two brightened limbs of the remnant.

show abstract

A New Look at Radio Supernova Remnants

Cited by 114 publications

References 3 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 DEM L299 in the Large Magellanic Cloud

Radio-continuum study of MCSNR J0536–7038 (DEM L249)

Contact Info

Product

Resources

About