Discovery of high-frequency quasi-periodic oscillation in short-duration gamma-ray bursts
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909501510123520 |
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| author | Yang, Xing Lü, Hou-Jun Rice, Jared Liang, En-Wei |
| author_facet | Yang, Xing Lü, Hou-Jun Rice, Jared Liang, En-Wei |
| contents | Rapidly rotating newborn magnetars, which originate from binary neutron star (NS) mergers and serve as the central engines of short gamma-ray bursts (GRBs), may leave some imprints on their prompt gamma-ray light curves even though they are far from their radiating fireballs. A high-frequency quasi-periodic oscillation (QPO) would be a unique feature for the magnetar central engine, especially a hypermassive magnetar. By conducting a systematic analysis of the prompt gamma-ray light curves from 605 short GRBs observed by {\em Fermi}/Gamma-ray Burst Monitor, we have identified such QPO signals in three GRBs (e.g. GRB 120323A, GRB 181222B, and GRB 190606A). The QPOs that peaked at $1258^{+6}_{-6}$ Hz for GRB 120323A, $623^{+4}_{-4}$ Hz for GRB 181222B, and $1410^{+4}_{-5}$ Hz for GRB 190606A are all with a confidence level above 5.2 $σ$. The high-frequency QPO signals of those three short GRBs may be caused by a hypermassive magnetar acting as the central engine in a binary NS merger of a binary NS. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_14207 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Discovery of high-frequency quasi-periodic oscillation in short-duration gamma-ray bursts Yang, Xing Lü, Hou-Jun Rice, Jared Liang, En-Wei High Energy Astrophysical Phenomena Rapidly rotating newborn magnetars, which originate from binary neutron star (NS) mergers and serve as the central engines of short gamma-ray bursts (GRBs), may leave some imprints on their prompt gamma-ray light curves even though they are far from their radiating fireballs. A high-frequency quasi-periodic oscillation (QPO) would be a unique feature for the magnetar central engine, especially a hypermassive magnetar. By conducting a systematic analysis of the prompt gamma-ray light curves from 605 short GRBs observed by {\em Fermi}/Gamma-ray Burst Monitor, we have identified such QPO signals in three GRBs (e.g. GRB 120323A, GRB 181222B, and GRB 190606A). The QPOs that peaked at $1258^{+6}_{-6}$ Hz for GRB 120323A, $623^{+4}_{-4}$ Hz for GRB 181222B, and $1410^{+4}_{-5}$ Hz for GRB 190606A are all with a confidence level above 5.2 $σ$. The high-frequency QPO signals of those three short GRBs may be caused by a hypermassive magnetar acting as the central engine in a binary NS merger of a binary NS. |
| title | Discovery of high-frequency quasi-periodic oscillation in short-duration gamma-ray bursts |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2501.14207 |