中国科学院机构知识库网格系统: 检索

A criterion for magnetars producing giant flares 期刊论文 OAI收割
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2025, 卷号: 540, 期号: 1, 页码: 319-330
作者: Meng Y(蒙盈); Zhang QS(张钱生); Lin J(林隽)

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收藏 | 浏览/下载：1/0 | 提交时间：2025/05/26

instabilities magnetic reconnection stars: flare stars: individual: SGR 1806-20 stars: magnetic fields stars: neutron

Spin Evolution of the Magnetar SGR J1935+2154 期刊论文 OAI收割
RESEARCH IN ASTRONOMY AND ASTROPHYSICS, 2024, 卷号: 24, 期号: 1
作者: Ge, Ming-Yu; Yang, Yuan-Pei; Lu, Fang-Jun; Zhou, Shi-Qi; Ji, Long

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收藏 | 浏览/下载：37/0 | 提交时间：2024/03/29

(stars:) pulsars: general (stars:) pulsars: individual (SGR J1935+2154) X-rays: bursts

Long-term photometric behavior and orbital period variations in the supersoft X-ray source V617 Sgr 期刊论文 OAI收割
NEW ASTRONOMY, 2023, 卷号: 103
作者: Zang L(臧蕾); Zhao EG(赵二刚); Fernández-Lajús, Eduardo; Zubairi, Ahmed Waqas; Sarotsakulchai, Nopphadon

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Binaries Close - binaries Eclipsing - stars Evolution - stars Individual (V617 sgr)

Discovery of non-metastable ammonia masers in Sagittarius B2 期刊论文 OAI收割
ASTRONOMY & ASTROPHYSICS, 2022, 卷号: 666, 页码: 16
作者: Yan, Y. T.; Henkel, C.; Menten, K. M.; Gong, Y.; Nguyen, H.

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收藏 | 浏览/下载：44/0 | 提交时间：2023/03/01

masers ISM: clouds ISM: individual objects: Sgr B2 HII regions radio lines: ISM

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：26/0 | 提交时间：2023/06/19

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

Study on the variation of orbital period, quasi-periodic oscillations and negative superhumps in V729 Sgr 期刊论文 OAI收割
NEW ASTRONOMY, 2022, 卷号: 93
作者: Sun, Qi-Bin; Qian SB(钱声帮); Dong, Ai-Jun; Zhi, Qi-Jun; Han ZT(韩忠涛)

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收藏 | 浏览/下载：50/0 | 提交时间：2022/07/18

Stars Binaries Eclipsing stars Dwarf novae stars Evolution stars Individual V729 sgr

双磁偶极子模型和磁星制动指数的研究 学位论文 OAI收割
北京: 中国科学院大学, 2021
作者: 闫方洲

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收藏 | 浏览/下载：67/0 | 提交时间：2022/06/30

双磁偶极子模型磁星的制动指数 SGR0501+4516 1E2259+586

Explaining high braking indices of magnetars SGR 0501+4516 and 1E 2259+586 using the double magnetic-dipole model 期刊论文 OAI收割
ASTRONOMISCHE NACHRICHTEN, 2021, 卷号: 342, 期号: 1-2, 页码: 7
作者: Yan, Fang-Zhou; Gao, Zhi-Fu; Yang, Wen-Shen; Dong, Ai-Jun

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收藏 | 浏览/下载：25/0 | 提交时间：2021/04/01

1E 2259+586 double magnetic-dipole model magnetar braking index SGR 0501+4516

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：25/0 | 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.

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：49/0 | 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.