Multi-wavelength observation of MAXI J1348–630 during the outburst in 2019

IF 1.8 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Manoj Mandal, Debasish Saha, Sabyasachi Pal, Arijit Manna
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引用次数: 0

Abstract

We study the multi-wavelength spectral properties of the black hole X-ray binary MAXI J1348–630 using quasi-simultaneous ALMA, NICER, and Swift observations during the decay phase of the January 2019 outburst. In millimeter wavelengths, radio continuum emissions in the frequency range of 89.56–351.44 GHz are measured. We found that the flux densities at millimeter wavelength varied between 12.18 mJy and 18.47 mJy with spectral index (\(\alpha \)) of \(0.28\pm 0.02\). The broadband spectrum suggests that the source was accompanied by weak synchrotron emission from the compact jets. Broadband spectral study indicates that MAXI J1348–630 falls in the regime of “radio-quiet” during the decay phase of the outburst. The NICER spectrum is fitted by a combined model of disk blackbody component (diskbb) along with a comptonization component (simpl) which explains the power-law continuum caused by the thermal Comptonisation of soft disk photons in a hot gas of electrons. The NICER spectrum is dominated by the comptonised components during the decay phase of the outburst close to the hard state of the source. We have investigated the correlation between X-ray and radio luminosity using quasi-simultaneous ALMA and NICER data to understand the source nature by locating the source in the \(L_{X}\)-\(L_{R}\) diagram. The correlation study of radio/X-ray luminosity suggests that MAXI J1348–630 did not follow the well-known track for black holes and it is a new member of a restricted group of sources.

Abstract Image

2019年爆发期间对MAXI J1348-630的多波长观测
我们在2019年1月爆发的衰变阶段利用准同步ALMA、NICER和Swift观测数据研究了黑洞X射线双星MAXI J1348-630的多波长光谱特性。在毫米波长上,测量了频率范围为 89.56-351.44 GHz 的射电连续辐射。我们发现毫米波长的通量密度在12.18 mJy和18.47 mJy之间变化,光谱指数(\(\alpha \))为(0.28\pm 0.02\)。宽带光谱表明,该源伴随着来自紧凑喷流的微弱同步辐射。宽带光谱研究表明,MAXI J1348-630在爆发的衰减阶段处于 "无线电安静 "状态。NICER的光谱是由一个磁盘黑体成分(diskbb)和一个彗星化成分(simpl)的组合模型拟合的,该模型解释了软磁盘光子在电子热气体中的热彗星化引起的幂律连续波。在爆发的衰变阶段,NICER 的光谱主要由接近光源硬态的彗星化成分构成。我们利用准同步的ALMA和NICER数据研究了X射线和射电光度之间的相关性,通过在\(L_{X}\)-\(L_{R}\)图中定位源来了解源的性质。射电/X射线光度的相关研究表明,MAXI J1348-630并没有遵循众所周知的黑洞轨迹,它是一个受限源群的新成员。
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来源期刊
Astrophysics and Space Science
Astrophysics and Space Science 地学天文-天文与天体物理
CiteScore
3.40
自引率
5.30%
发文量
106
审稿时长
2-4 weeks
期刊介绍: Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.
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