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中微子事件IC220624A候选射电对应体J1458+4121的VLBI观测研究

曾艾玲杨小龙赵薇洪晓瑜

天文学进展2024，Vol.42Issue(2)：276-285,10.

天文学进展2024，Vol.42Issue(2)：276-285,10.DOI:10.3969/j.issn.1000-8349.2024.02.06

中微子事件IC220624A候选射电对应体J1458+4121的VLBI观测研究

VLBI Observations for J1458+4121 the Candidate of Radio Counterpart of the Neutrino Event IC220624A

曾艾玲 ¹杨小龙 ²赵薇 ²洪晓瑜¹

作者信息

1. 上海科技大学物质科学与技术学院,上海 201210||中国科学院上海天文台,上海 200030||中国科学院大学天文与空间科学学院,北京 100049
2. 中国科学院上海天文台,上海 200030||中国科学院大学天文与空间科学学院,北京 100049
折叠

摘要

Abstract

We have collected and analyzed the limited the Very Large Array(VLA)archival data of J1458+4121,which is a possible candidate of neutrino event IC-220624A,based on which we observed the source first time with the Very Long Baseline Array(VLBA)at L and C bands.Through data processing and analysis,we obtained the VLBA images of J1458+4121.In addition,its more precise coordinate(α=14∶58∶20.772,δ=41∶21∶01.911)was obtained by phase reference technique.The total flux density observed by VLA decreases from 1.4 to 8.4 GHz,so its radio spectrum may be power-law.However,the total flux density observed by VLBA shows an increasing trend from 1.5 to 5 GHz,which means an inversted spectrum in the GHz band.Therefore,it is highly likely that J1458+4121 is a young radio source,and its neutrino production may be caused by the emergence of a new jet component.The results of this paper are beneficial to the follow-up study of J1458+4121,and extend the focus on neutrino origin from bright blazars to other types of active galactic nuclei.

关键词

中微子/活动星系核/甚长基线干涉测量

Key words

neutrino/active galactic nuclei/very long baseline interferometry

分类

天文与地球科学

引用本文复制引用

曾艾玲,杨小龙,赵薇,洪晓瑜..中微子事件IC220624A候选射电对应体J1458+4121的VLBI观测研究[J].天文学进展,2024,42(2):276-285,10.

基金项目

国家重点研发专项(2018YFA0404602) （2018YFA0404602）

天文学进展

OA北大核心CSTPCD

ISSN：1000-8349

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