scholarly journals An analysis of the FIR/RADIO continuum correlation in the small Magellanic cloud

2012 ◽  
Vol 343 (1) ◽  
pp. 301-317 ◽  
Author(s):  
Howard Leverenz ◽  
Miroslav D. Filipović
Keyword(s):  
Magellanic Cloud ◽  
Radio Continuum ◽  
Small Magellanic Cloud

scholarly journals The ASKAP EMU Early Science Project: radio continuum survey of the Small Magellanic Cloud

2019 ◽  
Vol 490 (1) ◽  
pp. 1202-1219 ◽  
Author(s):  
T D Joseph ◽  
M D Filipović ◽  
E J Crawford ◽  
I Bojičić ◽  
E L Alexander ◽  
...  
Keyword(s):  
Point Source ◽  
High Sensitivity ◽  
Magellanic Cloud ◽  
Point Sources ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Small Magellanic Cloud ◽  
Science Project ◽  
New Radio ◽  
Low Surface Brightness

ABSTRACT We present two new radio continuum images from the Australian Square Kilometre Array Pathfinder (ASKAP) survey in the direction of the Small Magellanic Cloud (SMC). These images are part of the Evolutionary Map of the Universe (EMU) Early Science Project (ESP) survey of the Small and Large Magellanic Clouds. The two new source lists produced from these images contain radio continuum sources observed at 960 MHz (4489 sources) and 1320 MHz (5954 sources) with a bandwidth of 192 MHz and beam sizes of 30.0 × 30.0 arcsec2 and 16.3 × 15.1 arcsec2, respectively. The median root mean square (RMS) noise values are 186 $\mu$Jy beam−1 (960 MHz) and 165 $\mu$Jy beam−1 (1320 MHz). To create point source catalogues, we use these two source lists, together with the previously published Molonglo Observatory Synthesis Telescope (MOST) and the Australia Telescope Compact Array (ATCA) point source catalogues to estimate spectral indices for the whole population of radio point sources found in the survey region. Combining our ASKAP catalogues with these radio continuum surveys, we found 7736 point-like sources in common over an area of 30 deg2. In addition, we report the detection of two new, low surface brightness supernova remnant candidates in the SMC. The high sensitivity of the new ASKAP ESP survey also enabled us to detect the bright end of the SMC planetary nebula sample, with 22 out of 102 optically known planetary nebulae showing point-like radio continuum emission. Lastly, we present several morphologically interesting background radio galaxies.

scholarly journals New 20-cm radio-continuum study of the small Magellanic cloud - part III: Compact Hii regions

2012 ◽  
pp. 53-64 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
N.F.H. Tothill ◽  
Horta de ◽  
...  
Keyword(s):  
Hii Regions ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Spectral Indices ◽  
Emission Mechanism ◽  
Small Magellanic Cloud ◽  
Southwestern Part ◽  
Continuum Image ◽  
Compact Array ◽  
Compact Hii Regions

We present and discuss a new catalogue of 48 compact Hii regions in the Small Magellanic Cloud (SMC) and a newly created deep 1420 MHz (?=20 cm) radio-continuum image of the N19 region located in the southwestern part of the SMC. The new images were created by merging 1420 MHz radiocontinuum archival data from the Australian Telescope Compact Array. The majority of these detected radio compact Hii regions have rather flat spectral indices which indicates, as expected, that the dominant emission mechanism is of thermal nature.

scholarly journals New 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud, Part I: The maps

2011 ◽  
pp. 95-102 ◽  
Author(s):  
E. Crawford ◽  
M.D. Filipovic ◽  
Horta de ◽  
G.F. Wong ◽  
N.F.H. Tothill ◽  
...  
Keyword(s):  
Radio Source ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Source Population ◽  
Small Magellanic Cloud ◽  
Extended Structure ◽  
Future Studies

We present new 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud (SMC), created with the "peeling" technique and a joint deconvolution. The maps have resolutions of 3000 and 2000 and r.m.s., noise of 0.7 and 0.8 mJy/beam at 6 and 3 cm, respectively. These maps will be used for future studies of the SMC's radio source population and overall extended structure.

scholarly journals New 20-cm radio-continuum study of the Small Magellanic Cloud, part II: Point sources

2011 ◽  
pp. 103-106 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
N.F.H. Tothill ◽  
Horta de ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Magellanic Cloud ◽  
Point Sources ◽  
Radio Continuum ◽  
Small Magellanic Cloud

We present a new catalogue of radio-continuum sources in the field of the Small Magellanic Cloud (SMC). This catalogue contains sources previously not found in 2370 MHz (?=13 cm) with sources found at 1400 MHz (?=20 cm) and 843 MHz (?=36 cm). 45 sources have been detected at 13 cm, with 1560 sources at 20 cm created from new high sensitivity and resolution radio-continuum images of the SMC at 20 cm from paper I. We also created a 36 cm catalogue to which we listed 1689 radio-continuum sources.

scholarly journals An ATCA radio-continuum study of the Small Magellanic Cloud - IV. A multifrequency analysis of the N 66 region

2006 ◽  
Vol 367 (4) ◽  
pp. 1379-1393 ◽  
Author(s):  
W. A. Reid ◽  
J. L. Payne ◽  
M. D. Filipovic ◽  
C. W. Danforth ◽  
P. A. Jones ◽  
...  
Keyword(s):  
Magellanic Cloud ◽  
Radio Continuum ◽  
Small Magellanic Cloud

scholarly journals Radio Continuum of the Small Magellanie Cloud at Wavelengths 6 and 3·4 cm

1976 ◽  
Vol 29 (4) ◽  
pp. 329 ◽  
Author(s):  
RX McGee ◽  
Lynette M Newton ◽  
PW Butler
Keyword(s):  
Neutral Hydrogen ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Radio Sources ◽  
Spectral Indices ◽  
Small Magellanic Cloud ◽  
Ionized Gas

The radio continuum at wavelength 6 cm has been surveyed in the direction of the Small Magellanic Cloud with a telescope beam of 4'�1 arc. Only 27 radio sources have been delineated in this galaxy, and details of their positions, flux densities and spectral indices are given. Some supporting observations were made of the stronger sources at 3�4 cm wavelength. The distribution of the 6 cm emission is compared with the distributions of the ionized gas and neutral hydrogen.

scholarly journals New 20-cm radio-continuum study of the small Magellanic cloud: Part I. Images

2011 ◽  
pp. 43-52 ◽  
Author(s):  
G.F. Wong ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
Horta de ◽  
T. Galvin ◽  
...  
Keyword(s):  
Radio Telescope ◽  
High Sensitivity ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Archival Data ◽  
Small Magellanic Cloud ◽  
Extended Structure ◽  
Future Studies ◽  
Compact Array

We present and discuss new high-sensitivity and resolution radiocontinuum images of the Small Magellanic Cloud (SMC) at ?=20 cm (?=1.4 GHz). The new images were created by merging 20-cm radio-continuum archival data, from the Australian Telescope Compact Array and the Parkes radio-telescope. Our images span from ?10"to ?150" in resolution and sensitivity of r.m.s.?0.5 mJy/beam. These images will be used in future studies of the SMC?s intrinsic sources and its overall extended structure.

scholarly journals An ATCA radio-continuum study of the Small Magellanic Cloud - II. Source identification and classification

2004 ◽  
Vol 355 (1) ◽  
pp. 44-50 ◽  
Author(s):  
J. L. Payne ◽  
M. D. Filipović ◽  
W. Reid ◽  
P. A. Jones ◽  
L. Staveley-Smith ◽  
...  
Keyword(s):  
Source Identification ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Small Magellanic Cloud

scholarly journals The supernova remnant population of the Small Magellanic Cloud

2019 ◽  
Vol 631 ◽  
pp. A127 ◽  
Author(s):  
Pierre Maggi ◽  
Miroslav D. Filipović ◽  
Branislav Vukotić ◽  
Jean Ballet ◽  
Frank Haberl ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Ambient Medium ◽  
Line Emission ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Radio Continuum ◽  
Core Collapse ◽  
Small Magellanic Cloud ◽  
X Ray ◽  
The Difference

Aims. We present a comprehensive study on the supernova remnant (SNR) population of the Small Magellanic Cloud (SMC). We measured multiwavelength properties of the SMC SNRs and compare them to those of the Large Magellanic Cloud (LMC) population. Methods. This study combines the large dataset of XMM-Newton observations of the SMC, archival and recent radio continuum observations, an optical line emission survey, and new optical spectroscopic observations. We were therefore able to build a complete and clean sample of 19 confirmed and four candidate SNRs. The homogeneous X-ray spectral analysis allowed us to search for SN ejecta and Fe K line emission, and to measure interstellar medium abundances. We estimated the ratio of core-collapse to type Ia supernova rates of the SMC based on the X-ray properties and the local stellar environment of each SNR. Results. After the removal of unconfirmed or misclassified objects, and the addition of two newly confirmed SNRs based on multi-wavelength features, we present a final list of 21 confirmed SNRs and two candidates. While no Fe K line is detected even for the brightest and youngest SNR, we find X-ray evidence of SN ejecta in 11 SNRs. We estimate a fraction of 0.62–0.92 core-collapse supernova for every supernova (90% confidence interval), higher than in the LMC. The difference can be ascribed to the absence of the enhanced star-formation episode in the SMC, which occurred in the LMC 0.5–1.5 Gyr ago. The hot-gas abundances of O, Ne, Mg, and Fe are 0.1–0.2 times solar. Their ratios, with respect to SMC stellar abundances, reflect the effects of dust depletion and partial dust destruction in SNR shocks. We find evidence that the ambient medium probed by SMC SNRs is less disturbed and less dense on average than in the LMC, consistent with the different morphologies of the two galaxies.

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