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Precise Parameters for Two LISA Sources
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AI
DOI:10.3847/1538-4357/adf743.png)
摘要
En 中文
我们给出了两个致密双白矮星(DWD)双星系统的精确参数,分别是SDSS J232230.20+050942.0(J2322+0509)和SDSS J063449.92+380352.2(J0634+3803),它们的轨道周期分别为20分钟和26.5分钟。这些系统将作为激光干涉空间天线(LISA)的验证源。为显著提高这两个系统的电磁(EM)约束条件及LISA可探测性预测,我们使用哈勃空间望远镜/空间望远镜成像光谱仪(HST/STIS)、凯克I/LRIS和凯克II/高分辨率成像光谱仪(Keck II/Echellette Spectrograph and Imager)进行了光谱后续观测。我们的分析显著改进了J2322+0509的主星和次星在温度、表面重力和质量方面的约束条件,以及两个系统的径向速度和轨道周期等动力学性质。对于J2322+0509,我们得到一个更新的倾角i = 25°,而对于J0634+3803,我们得到i = 43°。我们使用LDASOFT评估了这些源的可探测性。结合倾角的EM先验信息显著增强了引力波信号的恢复,将振幅不确定性降低了2~4倍,并将检测时间缩短了数月。我们的结果强调了多信使观测在表征DWD双星系统以及最大化LISA早期科学能力方面的重要性。
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期刊
IF:
5.4
论文数:
8.3W
被引数:
32.0W
机构
H
N
nasa marshall space flight center, huntsville, al 35812, usa
学者数:
23
论文数: 12
被引数: 0
引用论文
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