The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud

Joseph, T D; Filipović, M D; Crawford, E J; Bojičić, I; Alexander, E L; Wong, G F; Andernach, H; Leverenz, H; Norris, R P; Alsaberi, R Z E; Anderson, C; Barnes, L A; Bozzetto, L M; Bufano, F; Bunton, J D; Cavallaro, F; Collier, J D; Dénes, H; Fukui, Y; Galvin, T; Haberl, F; Ingallinera, A; Kapinska, A D; Koribalski, B S; Kothes, R; Li, D; Maggi, P; Maitra, C; Manojlović, P; Marvil, J; Maxted, N I; O’Brien, A N; Oliveira, J M; Pennock, C M; Riggi, S; Rowell, G; Rudnick, L; Sano, H; Sasaki, M; Seymour, N; Soria, R; Stupar, M; Tothill, N F H; Trigilio, C; Tsuge, K; Umana, G; Urošević, D; van Loon, J Th; Vardoulaki, E; Velović, V; Yew, M; Leahy, D; Chu, Y-H; Michałowski, M J; Kavanagh, P J; Grieve, K R

doi:10.1093/mnras/stz2650

The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud

Joseph, T D; Filipović, M D; Crawford, E J; Bojičić, I; Alexander, E L; Wong, G F; Andernach, H; Leverenz, H; Norris, R P; Alsaberi, R Z E; Anderson, C; Barnes, L A; Bozzetto, L M; Bufano, F; Bunton, J D; Cavallaro, F; Collier, J D; Dénes, H; Fukui, Y; Galvin, T; Haberl, F; Ingallinera, A; Kapinska, A D; Koribalski, B S; Kothes, R; Li, D; Maggi, P; Maitra, C; Manojlović, P; Marvil, J; Maxted, N I; O’Brien, A N; Oliveira, J M; Pennock, C M; Riggi, S; Rowell, G; Rudnick, L; Sano, H; Sasaki, M; Seymour, N; Soria, R; Stupar, M; Tothill, N F H; Trigilio, C; Tsuge, K; Umana, G; Urošević, D; van Loon, J Th; Vardoulaki, E; Velović, V; Yew, M; Leahy, D; Chu, Y-H; Michałowski, M J; Kavanagh, P J; Grieve, K R

Authors

T D Joseph

M D Filipović

E J Crawford

I Bojičić

E L Alexander

G F Wong

H Andernach

H Leverenz

R P Norris

R Z E Alsaberi

C Anderson

L A Barnes

L M Bozzetto

F Bufano

J D Bunton

F Cavallaro

J D Collier

H Dénes

Y Fukui

T Galvin

F Haberl

A Ingallinera

A D Kapinska

B S Koribalski

R Kothes

D Li

P Maggi

C Maitra

P Manojlović

J Marvil

N I Maxted

A N O’Brien

Joana Maria Oliveira j.oliveira@keele.ac.uk

C M Pennock

S Riggi

G Rowell

L Rudnick

H Sano

M Sasaki

N Seymour

R Soria

M Stupar

N F H Tothill

C Trigilio

K Tsuge

G Umana

D Urošević

Jacobus Van Loon j.t.van.loon@keele.ac.uk

E Vardoulaki

V Velović

M Yew

D Leahy

Y-H Chu

M J Michałowski

P J Kavanagh

K R Grieve

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” and 16.3”×15.1”, respectively. The median Root Mean Squared (RMS) noise values are 186 µJy beam-1 (960 MHz) and 165 µJy 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.

Citation

Joseph, T. D., Filipović, M. D., Crawford, E. J., Bojičić, I., Alexander, E. L., Wong, G. F., …Grieve, K. R. (2019). The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 490(1), 1202-1219. https://doi.org/10.1093/mnras/stz2650

Journal Article Type	Article
Acceptance Date	Sep 21, 2019
Online Publication Date	Sep 21, 2019
Publication Date	2019-11
Publicly Available Date	May 26, 2023
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Oxford University Press
Peer Reviewed	Peer Reviewed
Volume	490
Issue	1
Pages	1202-1219
DOI	https://doi.org/10.1093/mnras/stz2650
Keywords	catalogues – Magellanic Clouds.
Publisher URL	https://doi.org/10.1093/mnras/stz2650