利用韩国VLBI网络(KVN) 22-129 GHz观测对Blazar 3C 279喷流的研究

IF 0.6 Q4 ASTRONOMY & ASTROPHYSICS

Journal of Astronomy and Space Sciences Pub Date : 2021-12-01 DOI:10.5140/jass.2021.38.4.193

Sungmin Yoo, Sang-Sung Lee, Sang-Hyun Kim, H. An

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引用次数: 0

摘要

本文介绍了韩国VLBI网络(KVN)对高变量blazar 3C 279四波段数据的分析结果。我们使用5.6年的同期数据测量了22、43、86和129 GHz的通量密度和光谱指数。我们使用离散相关函数研究了射电发射特性与光学(2 × 1014 - 1.5 × 1015 Hz)、x射线(0.3-10 keV)和伽马射线(0.1-300 GeV)波段测量的发射特性之间的相关性。我们发现射电光谱指数和伽马射线通量之间存在显著的相关性，没有时间延迟，并使用扩展的喷流情景解释了这种相关性。

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Investigation of the Jets of the Blazar 3C 279 with Korean VLBI Network (KVN) 22–129 GHz Observations

We present analysis results of Korean VLBI Network (KVN) four-band data for the highly variable blazar 3C 279. We measured the 22, 43, 86, and 129 GHz flux densities and spectral indices of the source using contemporaneous data taken over 5.6 years. We used the discrete correlation function to investigate correlations between the radio emission properties and those measured in the optical (2 × 1014 – 1.5 × 1015 Hz), X-ray (0.3–10 keV), and gamma-ray (0.1–300 GeV) bands. We found a significant correlation between the radio spectral index and gamma-ray flux without a time delay and interpreted the correlation using an extended jet scenario for blazar emission.

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来源期刊

Journal of Astronomy and Space Sciences ASTRONOMY & ASTROPHYSICS-

CiteScore

1.30

自引率

20.00%

发文量

审稿时长

12 weeks

期刊介绍： JASS aims for the promotion of global awareness and understanding of space science and related applications. Unlike other journals that focus either on space science or on space technologies, it intends to bridge the two communities of space science and technologies, by providing opportunities to exchange ideas and viewpoints in a single journal. Topics suitable for publication in JASS include researches in the following fields: space astronomy, solar physics, magnetospheric and ionospheric physics, cosmic ray, space weather, and planetary sciences; space instrumentation, satellite dynamics, geodesy, spacecraft control, and spacecraft navigation. However, the topics covered by JASS are not restricted to those mentioned above as the journal also encourages submission of research results in all other branches related to space science and technologies. Even though JASS was established on the heritage and achievements of the Korean space science community, it is now open to the worldwide community, while maintaining a high standard as a leading international journal. Hence, it solicits papers from the international community with a vision of global collaboration in the fields of space science and technologies.