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arXiv 2006.02469astro-ph.SRastro-ph.HE
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用LWA观测100 MHz以下的耀斑星

Observing Flare Stars Below 100 MHz with the LWA

Ivey Davis, Greg Taylor, Jayce Dowell

摘要:

我们观测了狮子座AD、沃尔夫424、飞马座EQ、蝎虎座EV和鲸鱼座UV等耀斑星近135小时。这些恒星是在63和83 MHz之间使用长波阵列的干涉测量模式观测到的。由于耀斑星的辐射通常是圆偏振的,我们使用的条件是,斯托克斯I中存在的任何重要检测必须同时存在于斯托克斯V中,以便我们将其视为可能的耀斑。在此之后,我们对飞马座EQ星进行了一次边缘耀斑探测。这个耀斑在斯托克斯I和斯托克斯V中的通量密度分别为5.91 Jy和5.13 Jy,对应于亮度温度$1.75 \times 10^{16}(r/r_*)^{-2}$ K。

英文摘要:

We observed the flare stars AD Leonis, Wolf 424, EQ Pegasi, EV Lacertae, and UV Ceti for nearly 135 hours. These stars were observed between 63 and 83 MHz using the interferometry mode of the Long Wavelength Array. Given that emission from flare stars is typically circularly polarized, we used the condition that any significant detection present in Stokes I must also be present in Stokes V at the same time in order for us to consider it a possible flare. Following this, we made one marginal flare detection for the star EQ Pegasi. This flare had a flux density of 5.91 Jy in Stokes I and 5.13 Jy in Stokes V, corresponding to a brightness temperature $1.75 \times 10^{16}(r/r_*)^{-2}$ K.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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