A first glimpse at the Galactic plane with the ASKAP: the SCORPIO field
Date Issued
2021
Author(s)
•
•
•
•
•
Marvil, J.
•
Norris, R. P.
•
Hopkins, A. M.
•
•
•
•
•
Bordiu, C.
•
Bunton, J. D.
•
Collier, J. D.
•
Filipovic, M.
•
Franzen, T. M. O.
•
Thompson, M. A.
•
Andernach, H.
•
•
Dai, S.
•
Kapińska, A.
•
Koribalski, B. S.
•
Kothes, R.
•
Leahy, D.
•
Mcconnell, D.
•
Tothill, N.
•
Michałowski, M. J.
Abstract
In the broad context of the Australian Square Kilometer Array Pathfinder (ASKAP) early-science phase and preparation for the related surveys, we report the first radio observations towards the Galactic plane. The targeted field was chosen to encompass the entire SCORPIO survey, one of the several pathfinder projects for the Evolutionary Map of the Universe survey planned with the ASKAP. The observations were carried out in 2018 January at a central frequency of 912 MHz, with 15 operational antennas, and covered a total area of about 40 square degrees in three different pointings. The final image has a resolution of 24.1 × 21.1 arcsec2 and a median rms of $541\ \mu \mathrm{Jy\ beam}^{-1}$. We were able to extract 3545 candidate sources, 75 per cent of them point sources. For a preliminary validation, a comparison with the 843 MHz Molonglo Galactic Plane Survey is presented. Although the present observations were obtained with the ASKAP only partially deployed, its unique capability to map complex sources, such as those inhabiting the Galactic plane, at different angular scales, is highlighted. Within the SCORPIO field all the previously classified H II regions, Planetary Nebulae (PNe), and supernovae remnants (SNRs), previously known to be radio sources, were detected. We also report new radio detections from several H II regions previously classified as 'candidates' or 'radio quiet' and from half of all the PNe in the SCORPIO field with robust classification. Most notably, we find numerous unclassified, extended sources which constitute a promising sample of candidates H II regions and SNRs.
Volume
506
Issue
2
Start page
2232
Issn Identifier
0035-8711
Ads BibCode
2021MNRAS.506.2232U
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
2_stab1279.pdf
Description
PDF editoriale pt. 2
Size
9.39 MB
Format
Adobe PDF
Checksum (MD5)
41a84a87995908ada66ed98e98f75967
Loading...
Name
1_stab1279.pdf
Description
PDF editoriale pt. 1
Size
5.37 MB
Format
Adobe PDF
Checksum (MD5)
fc153d2dbc576af7c31f18f88be7bef7