中国科学院机构知识库网格系统: 检索

Luminosity distribution of fast radio bursts from CHIME/FRB Catalog 1 by means of the updated Macquart relation 期刊论文 OAI收割
Astrophysics and Space Science, 2022, 卷号: 367, 期号: 7, 页码: 66
作者: Cui, Xiang-Han; Zhang, Cheng-Min; Li, Di; Zhang, Jian-Wei; Peng, Bo

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收藏 | 浏览/下载：22/0 | 提交时间：2023/06/19

Transients Fast radio burst methods Statistical stars Magnetars flare sgr-1806-20 pulsar Astronomy & Astrophysics

Milliarcsecond Localization of the Repeating FRB 20201124A 期刊论文 OAI收割
Astrophysical Journal Letters, 2022, 卷号: 927, 期号: 1, 页码: 12L3
作者: Nimmo, K.; Hewitt, D. M.; Hessels, J. W. T.; Kirsten, F.; Marcote, B.

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收藏 | 浏览/下载：14/0 | 提交时间：2023/06/19

fast radio-burst environment classifier Astronomy & Astrophysics

The origin of the photospheric emission of GRB 220426A 期刊论文 OAI收割
Monthly Notices of the Royal Astronomical Society, 2022, 卷号: 517, 期号: 2, 页码: 2088-2102
作者: Song, Xin-Ying; Zhang, Shuang-Nan; Ge, Ming-Yu; Zhang, Shu

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收藏 | 浏览/下载：16/0 | 提交时间：2023/11/10

gamma-ray burst: individual radiation mechanisms: thermal radiative transfer scattering Astrophysics - High Energy Astrophysical Phenomena

Periodicity Search on X-Ray Bursts of SGR J1935+2154 Using 8.5 yr of Fermi/GBM Data 期刊论文 OAI收割
The Astrophysical Journal, 2021, 卷号: 923, 页码: L30
作者: HXMT

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收藏 | 浏览/下载：22/0 | 提交时间：2022/02/08

2008 1471 Astrophysics - High Energy Astrophysical Phenomena Abstract: We performed a systematic search for X-ray bursts of the SGR J1935+2154 using the Fermi Gamma-ray Burst Monitor continuous data dated from 2013 January to 2021 October. Eight bursting phases, which consist of a total of 353 individual bursts, are identified. We further analyze the periodic properties of our sample using the Lomb-Scargle periodogram. The result suggests that those bursts exhibit a period of ~238 days with a ~63.2% duty cycle. Based on our analysis, we further predict two upcoming active windows of the X-ray bursts. Since 2021 July, the beginning date of our first prediction has been confirmed by the ongoing X-ray activities of the SGR J1935+2154.

The Nearby Luminous Transient AT2018cow: A Magnetar Formed in a Subrelativistically Expanding Nonjetted Explosion 期刊论文 OAI收割
ASTROPHYSICAL JOURNAL LETTERS, 2020, 卷号: 888, 期号: 2, 页码: 9
作者: Mohan, P.; An, T.; Yang, J.

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收藏 | 浏览/下载：8/0 | 提交时间：2021/12/06

Transient sources High energy astrophysics Very long baseline interferometry Magnetars Burst astrophysics

No pulsed radio emission during a bursting phase of a Galactic magnetar 期刊论文 OAI收割
Nature, 2020, 卷号: 587, 页码: 63-65
作者: HXMT

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收藏 | 浏览/下载：44/0 | 提交时间：2022/02/08

Astrophysics - High Energy Astrophysical Phenomena Abstract: Fast radio bursts (FRBs) are millisecond-duration radio transients of unknown physical origin observed at extragalactic distances^1-3. It has long been speculated that magnetars are the engine powering repeating bursts from FRB sources^4-13, but no convincing evidence has been collected so far¹⁴. Recently, the Galactic magnetar SRG 1935+2154 entered an active phase by emitting intense soft íray bursts¹⁵. One FRB-like event with two peaks (FRB 200428) and a luminosity slightly lower than the faintest extragalactic FRBs was detected from the source, in association with a soft íray/hard-X-ray flare^18-21. Here we report an eight-hour targeted radio observational campaign comprising four sessions and assisted by multi-wavelength (optical and hard-X-ray) data. During the third session, 29 soft-íray repeater (SGR) bursts were detected in íray energies. Throughout the observing period, we detected no single dispersed pulsed emission coincident with the arrivals of SGR bursts, but unfortunately we were not observing when the FRB was detected. The non-detection places a fluence upper limit that is eight orders of magnitude lower than the fluence of FRB 200428. Our results suggest that FRB-SGR burst associations are rare. FRBs may be highly relativistic and geometrically beamed, or FRB-like events associated with SGR bursts may have narrow spectra and characteristic frequencies outside the observed band. It is also possible that the physical conditions required to achieve coherent radiation in SGR bursts are difficult to satisfy, and that only under extreme conditions could an FRB be associated with an SGR burst.

Constraining the X-Ray-Infrared Spectral Index of Second-timescale Flares from SGR 1935+2154 with Palomar Gattini-IR 期刊论文 OAI收割
The Astrophysical Journal, 2020, 卷号: 901, 页码: L7
作者: HXMT

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收藏 | 浏览/下载：24/0 | 提交时间：2022/02/08

Radio transient sources Magnetars Soft gamma-ray repeaters 2008 992 1471 Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Instrumentation and Methods for Astrophysics Abstract: The Galactic magnetar SGR 1935+2154 has been reported to produce the first example of a bright millisecond-duration radio burst (FRB 200428) similar to the cosmological population of fast radio bursts (FRBs). The detection of a coincident bright X-ray burst represents the first observed multiwavelength counterpart of an FRB. However, the search for similar emission at optical wavelengths has been hampered by the high inferred extinction on the line of sight. Here, we present results from the first search for second-timescale emission from the source at near-infrared (NIR) wavelengths using the Palomar Gattini-IR observing system in the J band, enabled by a novel detector readout mode that allows short exposure times of ?0.84 s with 99.9% observing efficiency. With a total observing time of ?12 hr (?47,728 images) during its 2020 outburst, we place median 3Ҡlimits on the second-timescale NIR fluence of ?18 Jy ms (13.1 AB mag). The corresponding extinction-corrected limit is ?125 Jy ms for an estimated extinction of A_J = 2.0 mag. Our observations were sensitive enough to easily detect an NIR counterpart of FRB 200428 if the NIR emission falls on the same power law as observed across its radio to X-ray spectrum. We report nondetection limits from epochs of four simultaneous X-ray bursts detected by the Insight-HXMT and NuSTAR telescopes during our observations. These limits provide the most stringent constraints to date on fluence of flares at 10¹⁴ Hz, and constrain the fluence ratio of the NIR emission to coincident X-ray bursts to R_NIR ? 0.025 (fluence index ?0.35).

Stellar reaction rate of Ni-55(p, gamma)Cu-56 in Type I X-ray bursts 期刊论文 OAI收割
NUCLEAR SCIENCE AND TECHNIQUES, 2019, 卷号: 30, 期号: 9, 页码: 9
作者: Ma, Shao-Bo; Zhang, Li-Yong; Hu, Jun

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收藏 | 浏览/下载：56/0 | 提交时间：2019/11/10

Nuclear astrophysics Reaction rate X-ray burst

GRB 111005A at z = 0.0133 and the Prospect of Establishing Long-Short GRB/GW Association 期刊论文 OAI收割
The Astrophysical Journal, 2017, 卷号: 851, 页码: L20
作者: Wang, Yuan-Zhu; Huang, Yong-Jia; Liang, Yun-Feng; Li, Xiang; Jin, Zhi-Ping

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收藏 | 浏览/下载：30/0 | 提交时间：2020/10/19

gamma-ray burst: general gamma-ray burst: individual: GRB 111005A gravitational waves Astrophysics - High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

Study of resonant scattering of Na-21+p relevant to astrophysical Ne-18(alpha, p)Na-21 reaction 会议论文 OAI收割
作者: He, J. J.; Zhang, L. Y.; Xu, S. W.; Chen, S. Z.; Hu, J.

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收藏 | 浏览/下载：19/0 | 提交时间：2018/08/20

Nuclear astrophysics x-ray burst reaction rate