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arXiv 2007.04998astro-ph.HE
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紧凑双星并合GW190814的光学和近红外对应物的研究

A search for optical and near-infrared counterparts of the compact binary merger GW190814

A. L. Thakur, S. Dichiara, E. Troja, E. A. Chase, R. Sanchez-Ramirez, L. Piro, C. L. Fryer, N. R. Butler, A. M. Watson, R. T. Wollaeger, E. Ambrosi, J. Becerra … 展开作者

A. L. Thakur, S. Dichiara, E. Troja, E. A. Chase, R. Sanchez-Ramirez, L. Piro, C. L. Fryer, N. R. Butler, A. M. Watson, R. T. Wollaeger, E. Ambrosi, J. Becerra González, R. L. Becerra, G. Bruni, S. B. Cenko, G. Cusumano, Antonino D'Aì, J. Durbak, C. J. Fontes, P. Gatkine, A. L. Hungerford, O. Korobkin, A. S. Kutyrev, W. H. Lee, S. Lotti, G. Minervini, G. Novara, V. La Parola, M. Pereyra, R. Ricci, A. Tiengo, S. Veilleux

摘要:

我们报告了我们对2019年8月14日由Advanced LIGO和Advanced Virgo探测器探测到的紧凑型双星合并GW190814的观测活动。这个信号是所有观测到的引力波(GW)源中定位最好的,90%概率区域为18.5度$^2$,估计距离约为240 Mpc。我们用十度光学瞬态成像仪(DDOTI)获得了宽视场观测,覆盖了88%的概率区域,直到极限星等$w$ = 19.9 AB。在高概率区域内的邻近星系被洛厄尔发现望远镜(LDT)瞄准,而有希望的候选对应物则通过再电离和瞬变红(RATIR)的多色测光和加那利群岛大望远镜(GTC)的光谱学来表征。我们使用我们的光学和近红外限制结合社区获得的上限,以限制可能的电磁对应合并。沿着其喷流轴观察到的伽马射线暴不受多波长数据集的青睐,而在较大视角下观察到的暴的存在并没有受到很好的约束。虽然我们的观测结果对类似于AT 2017 gfo的kilonova并不敏感,但我们可以排除高质量(> 0.1 M $_{\odot}$)快速移动(平均速度>= 0.3 c)的风喷出物,因为这可能是与这次合并有关的kilonova。

英文摘要:

We report on our observing campaign of the compact binary merger GW190814, detected by the Advanced LIGO and Advanced Virgo detectors on August 14th, 2019. This signal has the best localisation of any observed gravitational wave (GW) source, with a 90% probability area of 18.5 deg$^2$, and an estimated distance of ~ 240 Mpc. We obtained wide-field observations with the Deca-Degree Optical Transient Imager (DDOTI) covering 88% of the probability area down to a limiting magnitude of $w$ = 19.9 AB. Nearby galaxies within the high probability region were targeted with the Lowell Discovery Telescope (LDT), whereas promising candidate counterparts were characterized through multi-colour photometry with the Reionization and Transients InfraRed (RATIR) and spectroscopy with the Gran Telescopio de Canarias (GTC). We use our optical and near-infrared limits in conjunction with the upper limits obtained by the community to constrain the possible electromagnetic counterparts associated with the merger. A gamma-ray burst seen along its jet's axis is disfavoured by the multi-wavelength dataset, whereas the presence of a burst seen at larger viewing angles is not well constrained. Although our observations are not sensitive to a kilonova similar to AT2017gfo, we can rule out high-mass (> 0.1 M$_{\odot}$) fast-moving (mean velocity >= 0.3c) wind ejecta for a possible kilonova associated with this merger.

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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