A high-energy study of the supernova remnant G296.5+10.0

被引：1

作者：

Eppens, L. K. ^{[1
,2
]}

Combi, J. A. ^{[2
,3
,4
]}

Reynoso, E. M. ^{[1
]}

Garcia, F. ^{[2
,3
]}

Mestre, E. ^{[4
,5
]}

Abaroa, L. ^{[2
,3
]}

Romero, G. E. ^{[2
,3
]}

Luque-Escamilla, P. L. ^{[4
]}

Marti, J. ^{[4
]}

机构：

[1] UBA, Inst Astron & Fis Espacio, CONICET, C1428ZAA, Buenos Aires, Argentina

[2] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, B1900FWA, La Plata, Buenos Aires, Argentina

[3] UNLP, Inst Argentino Radioastron, CONICET, CCT La Plata,CICPBA, AR-1894 Buenos Aires, Argentina

[4] Univ Jaen, Dept Fis EPS, Campus Lagunillas S-N A3, E-23071 Jaen, Spain

[5] Inst Space Sci, CSIC, ICE, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 528卷 / 02期

关键词：

radiation mechanisms: thermal; ISM: supernova remnants (G296.5+10.0); radio lines: ISM; X-rays: ISM; PHOTON IMAGING CAMERA; GAMMA-RAY EMISSION; NEUTRON-STAR; XMM-NEWTON; FERMI-LAT; EXTINCTION; DISCOVERY; DIRECTION; ROTATION; SEARCH;

D O I：

10.1093/mnras/stad3921

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report a detailed multi-wavelength study of the supernova remnant G296.5+10.0 using archival data from XMM-Newton and Fermi-LAT complemented with ATCA observations. In the X-ray band, we performed an adaptive smoothing on the double background subtracted images to construct an X-ray mosaic map with six individual observations. Below 2.0 keV, G296.5+10.0 is asymmetrical, with the south-east side of the radio shell brighter than the south-west one. The spatially resolved X-ray spectral study confirms the thermal origin of the plasma, with enhanced metal abundances, probably arising from ejecta material according to the H I and infrared (140 mu m) distributions. In the gamma-ray band, we analysed 14 years of accumulated Fermi observations below 500 GeV via different fitting processes. To discuss the origin of the gamma-ray emission, we compare the GeV results with H I structures probably associated with the SNR and with the radio spectral indices found at various positions towards the radio shell. Moreover, we identified diverse sources candidates to contribute gamma-ray emissions observed. Also, we calculated the lepto-hadronic spectral energy distribution of the remnant for synchrotron, inverse Compton, Bremsstrahlung, and proton-proton processes. The emission at low energies can be explained by electron-synchrotron radiation, with a weak magnetic field of B = 25 mu G, while the gamma-ray data can be explained by hadronic interactions. Employing the reddening-distance method, we computed a distance of 1.4 kpc for the SNR, implying an age of 14 000 yr.

引用

页码：2095 / 2111

页数：17

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