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Radio Observations at 232 MHz and Multifrequency Spectral Studies of the SNR HB21
TLLandecker1; Zhang Xizhen2; Wu Xinji3; L A Higgs1; Qian Shanjie2
2001
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume1Issue:5Pages:443
AbstractRadio observational results at 232 MHz and multifrequency studies of the supernova remnant (SNR) HB21 are presented. Its integrated flux density at 232 MHz is about 390 +/- 30 Jy. Both the integrated spectral index and the spatial variations of spectral index of the remnant were calculated by combining the new map at 232 MHz with previously published maps made at 408, 1420, 2695, and 4750 MHz. The SNR has an integrated spectral index of about alpha = -0.43 (S-v proportional to v(alpha)) between 232 and 4750 MHz. In general the spectral index varies from -0.5 in southeast and west regions of the remnant to -0.3 in the central region and near the northwest edge. The new data of 232 MHz reveal that there is interaction between the remnant and the surrounding gas along the east edge of the remnant which causes the spectrum flattening at low frequency, while the very good agreement between the structure of X-ray emission and the central flat spectrum area suggests that the existence of thermal emission is the reason of spectrum flattening in the area.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/43189
Collection中国科学院国家天文台
Affiliation1.Dominion Radio Astrophysical Observatory
2.中国科学院国家天文台
3.北京大学
Recommended Citation
GB/T 7714
TLLandecker,Zhang Xizhen,Wu Xinji,et al. Radio Observations at 232 MHz and Multifrequency Spectral Studies of the SNR HB21[J]. Chinese Journal of Astronomy and Astrophysics,2001,1(5):443.
APA TLLandecker,Zhang Xizhen,Wu Xinji,L A Higgs,&Qian Shanjie.(2001).Radio Observations at 232 MHz and Multifrequency Spectral Studies of the SNR HB21.Chinese Journal of Astronomy and Astrophysics,1(5),443.
MLA TLLandecker,et al."Radio Observations at 232 MHz and Multifrequency Spectral Studies of the SNR HB21".Chinese Journal of Astronomy and Astrophysics 1.5(2001):443.
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