Discovery of the supernova remnant G351.0-5.4

被引：7

作者：

de Gasperin, F. ^{[1
]}

Evoli, C. ^{[2
]}

Brueggen, M. ^{[1
]}

Hektor, A. ^{[3
]}

Cardillo, M. ^{[4
]}

Thorman, P. ^{[5
]}

Dawson, W. A. ^{[5
,6
]}

Morrison, C. B. ^{[5
,7
]}

机构：

[1] Univ Hamburg, Hamburger Sternwarte, D-21029 Hamburg, Germany

[2] Univ Hamburg, Inst Theoret Phys, D-22761 Hamburg, Germany

[3] NICPB, EE-10143 Tallinn, Estonia

[4] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy

[5] Univ Calif Davis, Davis, CA 95616 USA

[6] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[7] Univ Bonn, Argelander Inst Astron, D-53121 Bonn, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2014年 / 568卷

关键词：

ISM: supernova remnants; radio continuum: ISM; gamma rays: ISM; LARGE-AREA TELESCOPE; COSMIC-RAY ACCELERATION; SKY SURVEY; CATALOG; NRAO; CALIBRATION; CHALLENGES; EMISSION; MHZ;

D O I：

10.1051/0004-6361/201424191

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

While searching the NRAO VLA Sky Survey (NVSS) for diffuse radio emission, we have serendipitously discovered extended radio emission close to the Galactic plane. The radio morphology suggests the presence of a previously unknown Galactic supernova remnant. An unclassified gamma-ray source detected by EGRET (3EG J1744-3934) is present in the same location and may stem from the interaction between high-speed particles escaping the remnant and the surrounding interstellar medium. Our aim is to confirm the presence of a previously unknown supernova remnant and to determine a possible association with the gamma-ray emission 3EG 317443934. We have conducted optical and radio follow-ups of the target using the Dark Energy Camera (DECam) on the Blanco telescope at Cerro Tololo Inter-American Observatory (CTIO) and the Giant Meterwave Radio Telescope (GMRT). We then combined these data with archival radio and gamma-ray observations. While we detected the extended emission in four different radio bands (325, 1400, 2417, and 4850 MHz), no optical counterpart has been identified. Given its morphology and brightness, it is likely that the radio mission is caused by an old supernova remnant no longer visible in the optical band. Although an unclassified EGRET source is co located with the supernova remnant, Fermi-LAT data do not show a significant gamma-ray excess that is correlated with the radio emission. However, in the radial distribution of the gamma-ray events, a spatially extended feature is related to supernova remnant at a confidence level of similar to 1.5 sigma. We classify the newly discovered extended emission in the radio band as the old remnant of a previously unknown Galactic supernova: SNR G351.0-5.4,

引用

页数：5

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