A first glimpse at the Galactic plane with the ASKAP: the SCORPIO field

被引：11

作者：

Umana, G. ^{[1
]}

Trigilio, C. ^{[1
]}

Ingallinera, A. ^{[1
]}

Riggi, S. ^{[1
]}

Cavallaro, F. ^{[1
,2
]}

Marvil, J. ^{[3
]}

Norris, R. P. ^{[4
,5
]}

Hopkins, A. M. ^{[6
]}

Buemi, C. S. ^{[1
]}

Bufano, F. ^{[1
]}

Leto, P. ^{[1
]}

Loru, S. ^{[1
]}

Bordiu, C. ^{[1
]}

Bunton, J. D. ^{[4
]}

Collier, J. D. ^{[2
,5
]}

Filipovic, M. ^{[5
]}

Franzen, T. M. O. ^{[7
]}

Thompson, M. A. ^{[8
]}

Andernach, H. ^{[9
]}

Carretti, E. ^{[10
]}

Dai, S. ^{[5
]}

Kapinska, A. ^{[3
]}

Koribalski, B. S. ^{[4
,5
]}

Kothes, R. ^{[11
]}

Leahy, D. ^{[12
]}

Mcconnell, D. ^{[4
]}

Tothill, N. ^{[5
]}

Michalowski, M. J. ^{[13
]}

机构：

[1] INAF, Osservaiorio Astrofis Catania, Via Santa Sofia 78, I-95123 Catania, Italy

[2] Univ Cape Town, Dept Astron, Interuniv Inst Data Intens Astron IDIA, Private Bag X3, ZA-7701 Rondebosch, South Africa

[3] Domen Sci Operat Ctr, Natl Radio Astron Observ, 1003 Lopezville Rd, Socorro, NM 87801 USA

[4] CSIRO Astron & Space Sci, POf Box 76, Epping, NSW 1710, Australia

[5] Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia

[6] Macquarie Univ, Australian Astron Opt, 105 Delhi Rd, N Ryde, NSW 2113, Australia

[7] ASTRON Netherlands Inst Radio Astron, POB 2, NL-7990 AA Dwingeloo, Netherlands

[8] Univ Hertfordshire, Ctr Astrophys Res, Dept Phys Astron & Math, Coll Lane, Hatfield AL10 9AB, Herts, England

[9] Univ Guanajuato, Dept Astron, DCNE, Callejon Jalisco S-N, Guanajuato, Mexico

[10] INAF, Ist Radioastron, Via Gobetti 101, Bologna, Italy

[11] Natl Res Council Canada, Dominion Radio Astrophys Observ, Herzberg Astron & Astrophys, POB 248, Penticton, BC V2A 6J9, Canada

[12] Univ Calgary, Dept Phys & Astron, 2500 Univ DrNW, Calgary, AB T2N 1N4, Canada

[13] Adam Mickiewicz Univ, Astron Observ Inst, Fac Phys, Ul Sloneczna 36, PL-60286 Poznan, Poland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 506卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

techniques: image processing; techniques: interferometric; surveys; stars: evolution; stars: formation; radio continuum: general; MASS STAR-FORMATION; INFRARED SURVEY; SUPERNOVA-REMNANTS; COORDINATED RADIO; EVOLUTIONARY MAP; HI-GAL; CATALOG; NEBULAE; MIPSGAL; SKY;

D O I：

10.1093/mnras/stab1279

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 x 21.1 arcsec(2) and a median rms of 541 mu 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.

引用

页码：2232 / 2246

页数：15

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