Tootfinder

Signature of a magnetar central engine with precession motion in the X-ray emission of GRB 220711B
Ying-Ze Shan, Xing Yang, Hou-Jun L\"u, Jared Rice, Hao-Yu Yuan, Xue-Zhao Chang, Zhao Joseph Zhang, Le Zou, En-Wei Liang
https://arxiv.org/abs/2508.00284

Signature of a magnetar central engine with precession motion in the X-ray emission of GRB 220711B
The $γ$-ray light curve of long-duration GRB 220711B, is characterized by a multi-peaked structure with a duration lasting $\sim$105 seconds. More interestingly, the X-ray afterglow light curve is composed of a plateau emission smoothly connected with a $\sim t^{-2}$ segment overlapping some flares followed by an extremely steep decay. By analysing the light curves of both prompt emission and X-ray afterglow, no high-confidence-level quasi-periodic oscillation (QPO) signals are found in the li…

Magnetar Outburst Models with Cooling Simulations
D. De Grandis, N. Rea, K. Kovlakas, F. Coti Zelati, D. Vigan\`o, S. Ascenzi, J. A. Pons, R. Turolla, S. Zane
https://arxiv.org/abs/2509.01429

Magnetar Outburst Models with Cooling Simulations
Magnetar outbursts are among the most noteworthy manifestations of magnetism in neutron stars. They are episodes in which the X-ray luminosity of a strongly magnetised neutron star swiftly rises by several orders of magnitude to then decay over the course of several months. In this work, we present simulations of outbursts as a consequence of localised heat deposition in a magnetised neutron star crust, and the subsequent surface cooling. In particular, we employed a magnetothermal evolution co…

The axion signature of strange quark star in SGR 0501 4516
C. R. Das
https://arxiv.org/abs/2507.01373 https://arxiv.org/pdf/2507.0137…

The axion signature of strange quark star in SGR 0501+4516
We study the axion effects on quark matter and quark-matter cores in strange quark magnetars using a three-flavor Nambu-Jona-Lasinio model to represent the charge-parity violating effects through the axion field. Here, axions decay to gamma rays in a very strong magnetic field, which the Fermi Large Area Telescope (Fermi-LAT), Imaging X-ray Polarimetry Explorer (IXPE), and XMM-Newton will be able to detect.

H.E.S.S. programme searching for VHE gamma rays associated with FRBs
F. Aharonian, A. Archaryya, J. Aschersleben, H. Ashkar, M. Backes, V. Barbosa. Martins, R. Batzofin, Y. Becherini, D. Berge, K. Bernl\"ohr, M. B\"ottcher, C. Boisson, J. Bolmont, M. de. Bony. de. Lavergne, J. Borowska, F. Bradascio, R. Brose, A. Brown, F. Brun, B. Bruno, C. Burger-Scheidlin, S. Casanova, J. Celic, M. Cerruti, T. Chand, S. Chandra, A. Chen, J. Chibueze, O. Chibueze, J. Damascene. Mbarubucyeye…

H.E.S.S. programme searching for VHE gamma rays associated with FRBs
Fast Radio Bursts (FRBs) are highly energetic, extremely short-lived bursts of radio flashes. Despite extensive research, the exact cause of these outbursts remains speculative. The high luminosity, short duration, and high dispersion measure of these events suggest they result from extreme, high-energy extragalactic sources, such as highly magnetized and rapidly spinning neutron stars known as magnetars. The number of detected FRBs, including repeating ones, has grown rapidly in recent years. …

SN2022jli modeled with a $^{56}$Ni double-layer and a magnetar
Mariana Orellana, Melina C. Bersten, Claudia P. Guti\'errez
https://arxiv.org/abs/2507.21304 https://

SN2022jli modeled with a $^{56}$Ni double-layer and a magnetar
We study the bolometric evolution of the exceptional Type Ic Supernova (SN) 2022jli, aiming to understand the underlying mechanisms responsible for its distinctive double-peaked light curve morphology, extended timescales, and the rapid, steep decline in luminosity observed at around 270 days after the SN discovery. We present a quantitative assessment of two leading models through hydrodynamic radiative simulations: two shells enriched with nickel and a combination of nickel and magnetar power…

Lightcurve Features of Magnetar-Powered Superluminous Supernovae with Gravitational-Wave Emission and High-Energy Leakage
Jinghao Zhang, Yacheng Kang, Jiahang Zhong, Hong-Bo Li, Liang-Duan Liu, Yun-Wei Yu, Lijing Shao
https://arxiv.org/abs/2508.18940

Lightcurve Features of Magnetar-Powered Superluminous Supernovae with Gravitational-Wave Emission and High-Energy Leakage
Superluminous supernovae (SLSNe) are a distinct class of stellar explosions, exhibiting peak luminosities 10-100 times brighter than those of normal SNe. Their extreme luminosities cannot be explained by the radioactive decay of $^{56}\mathrm{Ni}$ and its daughter $^{56}\mathrm{Co}$ alone. Consequently, models invoking newly formed millisecond magnetars have been widely proposed, capable of supplying additional energy through magnetic dipole radiation. For these rapidly rotating magnetars, howe…

Magnetars in Binaries as the Engine of Actively Repeating Fast Radio Bursts
Bing Zhang (HKU,UNLV), Rui-Chong Hu (UNLV)
https://arxiv.org/abs/2508.12119 https://

Magnetars in Binaries as the Engine of Actively Repeating Fast Radio Bursts
The association between FRB 20200428D and the Galactic magnetar SGR J1935+2154 makes magnetars the leading engine of cosmological fast radio bursts (FRBs). However, there is a list of puzzles for this magnetar-for-all-FRBs scenario: known Galactic magnetars are all isolated and none of them are active repeaters; some cosmological repeaters have extremely high repetition rates but without any measurable spin-related periodicity; some show long-term periodic active windows; and some show diverse …

A period-increasing oscillation signal in a long gamma-ray burst
Tian-Ci Zheng, Stefano Covino, Yun Wang, Xiang-Dong Li, Da-Ming Wei, Zhi-Ping Jin
https://arxiv.org/abs/2507.00873

A period-increasing oscillation signal in a long gamma-ray burst
Gamma-ray bursts (GRBs), the brightest electromagnetic bursts in the universe, are believed to originate from ultra-relativistic jets launched by the rapidly rotating central engine, either a disk-surrounded newly formed black hole (BH) or a magnetar. Such a central engine potentially possesses rapidly evolving physical characteristics, as it is just born. The caught of time-increasing frequency in the gravitational wave signals is the evidence of upon opinion. Here we report a possible oscilla…

Crustal Quakes Spark Magnetospheric Blasts: Imprints of Realistic Magnetar Crust Oscillations on the Fast Radio Burst Signal
Louis Burnaz, Elias R. Most, Ashley Bransgrove
https://arxiv.org/abs/2508.18033

Crustal Quakes Spark Magnetospheric Blasts: Imprints of Realistic Magnetar Crust Oscillations on the Fast Radio Burst Signal
Many transients believed to originate from magnetars are thought to be triggered by crustal activity, which feeds back on the surrounding magnetosphere. These perturbations, through a variety of proposed mechanisms, can convert a fraction of the magnetic energy stored in the magnetosphere, as well as the energy injected by crustal activity itself into electromagnetic emission, including X-ray bursts and fast radio bursts. Here we provide a first glimpse of this process by coupling magneto-elast…

A Unified Volumetric Rate-Energy Relation from Magnetar Radio Bursts to Fast Radio Bursts
H. T. Lan (NJU), S. X. Yi (NJU), F. Y. Wang (NJU)
https://arxiv.org/abs/2507.16365

A Unified Volumetric Rate-Energy Relation from Magnetar Radio Bursts to Fast Radio Bursts
Fast radio bursts (FRBs) are millisecond radio pulses with extremely high bright temperature. Their physical origin is still a mystery. The discovery of FRB 20020428 supports the idea that at least a portion of FRBs is generated by magnetars. However, FRB 20200428 and other radio bursts of SGR 1935+2154 are much less energetic than that of extragalactic FRBs. Thus, whether the progenitors of extragalactic FRBs are magnetars is still in controversy. Here, we investigate the volumetric rates of r…