2022ApJ...925..165H

Query : 2022ApJ...925..165H

2022ApJ...925..165H - Astrophys. J., 925, 165-165 (2022/February-1)

The 1.28 GHz MeerKAT Galactic Center Mosaic.

HEYWOOD I., RAMMALA I., CAMILO F., COTTON W.D., YUSEF-ZADEH F., ABBOTT T.D., ADAM R.M., ADAMS G., ALDERA M.A., ASAD K.M.B., BAUERMEISTER E.F., BENNETT T.G.H., BESTER H.L., BODE W.A., BOTHA D.H., BOTHA A.G., BREDERODE L.R.S., BUCHNER S., BURGER J.P., CHEETHAM T., DE VILLIERS D.I.L., DIKGALE-MAHLAKOANA M.A., DU TOIT L.J., ESTERHUYSE S.W.P., FANAROFF B.L., FEBRUARY S., FOURIE D.J., FRANK B.S., GAMATHAM R.R.G., GEYER M., GOEDHART S., GOUWS M., GUMEDE S.C., HLAKOLA M.J., HOKWANA A., HOOSEN S.W., HORRELL J.M.G., HUGO B., ISAACSON A.I., JOZSA G.I.G., JONAS J.L., JOUBERT A.F., JULIE R.P.M., KAPP F.B., KENYON J.S., KOTZE P.P.A., KRIEK N., KRIEL H., KRISHNAN V.K., LEHMENSIEK R., LIEBENBERG D., LORD R.T., LUNSKY B.M., MADISA K., MAGNUS L.G., MAHGOUB O., MAKHABA A., MAKHATHINI S., MALAN J.A., MANLEY J.R., MARAIS S.J., MARTENS A., MAUCH T., MERRY B.C., MILLENAAR R.P., MNYANDU N., MOKONE O.J., MONAMA T.E., MPHEGO M.C., NEW W.S., NGCEBETSHA B., NGOASHENG K.J., OCKARDS M.T., OOZEER N., OTTO A.J., PASSMOOR S.S., PATEL A.A., PEENS-HOUGH A., PERKINS S.J., RAMAILA A.J.T., RAMANUJAM N.M.R., RAMUDZULI Z.R., RATCLIFFE S.M., ROBYNTJIES A., SALIE S., SAMBU N., SCHOLLAR C.T.G., SCHWARDT L.C., SCHWARTZ R.L., SERYLAK M., SIEBRITS R., SIROTHIA S.K., SLABBER M., SMIRNOV O.M., SOFEYA L., TALJAARD B., TASSE C., TIPLADY A.J., TORUVANDA O., TWUM S.N., VAN BALLA T.J., VAN DER BYL A., VAN DER MERWE C., VAN TONDER V., VAN WYK R., VENTER A.J., VENTER M., WALLACE B.H., WELZ M.G., WILLIAMS L.P. and XAIA B.

Abstract (from CDS):

The inner ∼200 pc region of the Galaxy contains a 4 million M☉ supermassive black hole (SMBH), significant quantities of molecular gas, and star formation and cosmic-ray energy densities that are roughly two orders of magnitude higher than the corresponding levels in the Galactic disk. At a distance of only 8.2 kpc, the region presents astronomers with a unique opportunity to study a diverse range of energetic astrophysical phenomena, from stellar objects in extreme environments, to the SMBH and star-formation-driven feedback processes that are known to influence the evolution of galaxies as a whole. We present a new survey of the Galactic center conducted with the South African MeerKAT radio telescope. Radio imaging offers a view that is unaffected by the large quantities of dust that obscure the region at other wavelengths, and a scene of striking complexity is revealed. We produce total-intensity and spectral-index mosaics of the region from 20 pointings (144 hr on-target in total), covering 6.5 square degrees with an angular resolution of 4'' at a central frequency of 1.28 GHz. Many new features are revealed for the first time due to a combination of MeerKAT's high sensitivity, exceptional u, v-plane coverage, and geographical vantage point. We highlight some initial survey results, including new supernova remnant candidates, many new nonthermal filament complexes, and enhanced views of the Radio Arc bubble, Sagittarius A, and Sagittarius B regions. This project is a South African Radio Astronomy Observatory public legacy survey, and the image products are made available with this article.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galactic center - Galactic radio sources - Radio interferometry

Simbad objects: 39

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Number of rows : 39
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
2 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
3 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1407 1
4 PN A66 39 PN 16 27 33.7199223168 +27 54 33.471380376   15.27 15.60     DAO.70 132 0
5 GAL 358.7+00.8 SR? 17 39 -29.6           ~ 1 0
6 GLOSTAR G359.172+00.264 SR? 17 42 36.1 -29 30 12           ~ 2 0
7 NAME the Ripple Filament Rad 17 43 52.0 -29 13 47           ~ 52 1
8 2E 3938 HXB 17 43 54.7 -29 44 44           ~ 693 1
9 NAME Gal Center Snake Rad 17 44 17.9 -29 46 00           ~ 62 1
10 NAME Sgr C Filament ? 17 44.5 -29 26           ~ 6 0
11 NAME Sgr C MoC 17 44 36.3 -29 28 13           ~ 400 0
12 NAME NTFs PoC 17 45 -29.           ~ 51 2
13 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 955 0
14 NAME Fermi Bubbles bub 17 45 -29.0           ~ 525 0
15 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
16 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
17 NAME Sgr A East SNR 17 45 41 -29 00.8           ~ 523 2
18 [NHS93] 22 WR* 17 46 05.625 -28 51 31.92           WN5b 27 0
19 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 561 0
20 SNR G000.3+00.0 SNR 17 46 15 -28 38.0           ~ 40 1
21 NAME Sickle HII 17 46 15.2 -28 49 49           ~ 128 0
22 [FMM95] 3 s*b 17 46 15.240 -28 50 03.58           LBV 151 1
23 NAME Galactic Center Radio Arc Rad 17 46 16.9 -28 48 52           ~ 132 0
24 NAME Sgr B1 MoC 17 47 02.0 -28 31 57           ~ 177 0
25 NAME Sgr B MoC 17 47 02 -28 25.4           ~ 241 0
26 NAME Mouse Rad 17 47 15.78 -29 58 01.0           ~ 120 1
27 SNR G000.9+00.1 SNR 17 47.3 -28 09           ~ 222 1
28 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2443 1
29 [ABB2014] WISE G000.834-00.457 bub 17 49 20.7 -28 27 12           ~ 3 0
30 PKS 1827-36 rG 18 30 58.9044114912 -36 02 30.801933924           ~ 85 1
31 SS 433 HXB 19 11 49.5647697480 +04 58 57.827127648   16.854 14.643     A7Ib 2253 4
32 SNR G039.7-02.0 SNR 19 12 20 +04 55.0           ~ 378 1
33 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
34 IC 5070 HII 20 51.0 +44 22           ~ 218 1
35 [YHC2004] G359.79+0.17 Rad ~ ~           ~ 5 0
36 [YHC2004] G359.62+0.28 Rad ~ ~           ~ 2 0
37 [YHC2004] G359.44+0.14 Rad ~ ~           ~ 2 0
38 [YHC2004] G359.64+0.30 Rad ~ ~           ~ 2 0
39 [YHC2004] G359.42+0.13 Rad ~ ~           ~ 2 0

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