Evidence of Gradients of Density and Magnetic Field in the Remnant of Tycho's Supernova

被引：3
|
作者：
Petruk, Oleh [1 ,2 ]
Kuzyo, Taras [2 ]
Patrii, Mariana [3 ]
Chomiuk, Laura [4 ]
Arias, Maria [5 ]
Miceli, Marco [1 ,6 ]
Orlando, Salvatore [1 ]
Bocchino, Fabrizio [1 ]
机构：
[1] INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy
[2] Inst Appl Problems Mech & Math, Naukova St 3-b, UA-79060 Lvov, Ukraine
[3] Ivan Franko Natl Univ Lviv, Fac Phys, Kyryla & Methodia 8, UA-79005 Lvov, Ukraine
[4] Michigan State Univ, Ctr Data Intens & Time Domain Astron, Dept Phys & Astron, E Lansing, MI 48824 USA
[5] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
[6] Univ Palermo, Dipartimento Fis & Chim E Segre, Piazza Parlamento 1, I-90134 Palermo, Italy
来源：
ASTROPHYSICAL JOURNAL | 2024年 / 972卷 / 01期
基金：
美国国家科学基金会;
关键词：
X-RAY-EMISSION; SYNCHROTRON EMISSION; EXPANSION; EJECTA; ACCELERATION; SHOCKS; RADIO; CONSTRAINTS; ENVIRONMENT; ASYMMETRIES;
D O I：
10.3847/1538-4357/ad62ff
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
By using surface brightness maps of Tycho's supernova remnant (SNR) in radio and X-rays, along with the properties of thermal and synchrotron emission, we have derived the postshock density and magnetic field (MF) strength distributions over the projection of this remnant. Our analysis reveals a density gradient oriented toward the northwest, while the MF strength gradient aligns with the Galactic plane, pointing eastward. Additionally, utilizing this MF map, we have derived the spatial distributions of the cutoff frequency and maximum energy of electrons in Tycho's SNR. We further comment on the implications of these findings for interpreting the gamma-ray emission from Tycho's SNR.
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页数：8
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