Relevant bibliographies by topics / Magnetar powered GRB

Academic literature on the topic 'Magnetar powered GRB'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Magnetar powered GRB.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Magnetar powered GRB"

1

O'Brien, Paul T., and Antonia Rowlinson. "Are short GRBs powered by magnetars?" Proceedings of the International Astronomical Union 7, S279 (April 2011): 297–300. http://dx.doi.org/10.1017/s1743921312013087.

Full text
Abstract:
AbstractThe standard model for a short duration Gamma-Ray Burst (GRB) involves the merger of a neutron star binary system, resulting in a black hole which accretes for a brief period of time. However, some of the short-duration GRBs observed by the Swift satellite show features in their light curves which are difficult to explain in this model. As an alternative, we examine the light curves of the Swift short GRB sample to see if they can be explained by the presence of a highly magnetised, rapidly rotating pulsar, or magnetar. We find that magnetars may be present in a large fraction of short bursts, and discuss briefly how this model can be tested using the next generation of gravity-wave observatories.
APA, Harvard, Vancouver, ISO, and other styles
2

Zhang, Zhen-Dong, Yun-Wei Yu, and Liang-Duan Liu. "The Effects of a Magnetar Engine on the Gamma-Ray Burst-associated Supernovae: Application to Double-peaked SN 2006aj." Astrophysical Journal 936, no. 1 (August 30, 2022): 54. http://dx.doi.org/10.3847/1538-4357/ac8548.

Full text
Abstract:
Abstract A millisecond magnetar engine has been widely suggested to exist in gamma-ray burst (GRB) phenomena, in view of its substantial influences on the GRB afterglow emission. In this paper, we investigate the effects of the magnetar engine on the supernova (SN) emission, which is associated with long GRBs and, specifically, confront the model with the observational data of SN 2006aj/GRB 060218. SN 2006aj is featured by its remarkable double-peaked ultraviolet-optical (UV-opt) light curves. By fitting these light curves, we demonstrate that the first peak can be well accounted for by the breakout emission of the shock driven by the magnetar wind, while the primary supernova emission is also partly powered by the energy injection from the magnetar. The magnetic field strength of the magnetar is constrained to be ∼1015 G, which is in good agreement with the common results inferred from the afterglow emission of long GRBs. In more detail, it is further suggested that the UV excess in the late emission of the supernova could also be due to the leakage of the nonthermal emission of the pulsar wind nebula, if some ad hoc conditions can be satisfied. The consistency between the model and the SN 2006aj observation indicates that the magnetar engine is likely to be ubiquitous in the GRB phenomena and even further intensify their connection with the phenomena of superluminous supernovae.
APA, Harvard, Vancouver, ISO, and other styles
3

Bruni, G., B. O’Connor, T. Matsumoto, E. Troja, T. Piran, L. Piro, and R. Ricci. "Late-time radio observations of the short GRB 200522A: constraints on the magnetar model." Monthly Notices of the Royal Astronomical Society: Letters 505, no. 1 (May 7, 2021): L41—L45. http://dx.doi.org/10.1093/mnrasl/slab046.

Full text
Abstract:
ABSTRACT GRB 200522A is a short duration gamma-ray burst (GRB) at redshift z= 0.554 characterized by a bright infrared counterpart. A possible, although not unambiguous, interpretation of the observed emission is the onset of a luminous kilonova powered by a rapidly rotating and highly magnetized neutron star, known as magnetar. A bright radio flare, arising from the interaction of the kilonova ejecta with the surrounding medium, is a prediction of this model. Whereas the available data set remains open to multiple interpretations (e.g. afterglow, r-process kilonova, magnetar-powered kilonova), long-term radio monitoring of this burst may be key to discriminate between models. We present our late-time upper limit on the radio emission of GRB 200522A, carried out with the Karl G. Jansky Very Large Array at 288 d after the burst. For kilonova ejecta with energy Eej $\approx 10^{53}\, \rm erg$, as expected for a long-lived magnetar remnant, we can already rule out ejecta masses $M_{\rm ej}\lesssim 0.03\, \mathrm{M}_\odot$ for the most likely range of circumburst densities n ≳ 10−3 cm−3. Observations on timescales of ≈ 3–10 yr after the merger will probe larger ejecta masses up to Mej ∼ 0.1 M⊙, providing a robust test to the magnetar scenario.
APA, Harvard, Vancouver, ISO, and other styles
4

Kann, D. A., P. Schady, F. Olivares E., S. Klose, A. Rossi, D. A. Perley, T. Krühler, et al. "Highly luminous supernovae associated with gamma-ray bursts." Astronomy & Astrophysics 624 (April 2019): A143. http://dx.doi.org/10.1051/0004-6361/201629162.

Full text
Abstract:
Context. GRB 111209A, one of the longest gamma-ray bursts (GRBs) ever observed, is linked to SN 2011kl, which is the most luminous GRB supernova (SN) detected so far. Several lines of evidence indicate that this GRB-SN is powered by a magnetar central engine. Aims. We place SN 2011kl into the context of large samples of SNe, addressing in more detail the question of whether this GRB-SN could be radioactively powered, and whether it represents an extreme version of a GRB-SN or an underluminous superluminous SN (SLSN). Methods. We modelled SN 2011kl using SN 1998bw as a template and derived a bolometric light curve including near-infrared data. We compared the properties of SN 2011kl to literature results on stripped-envelope and SLSNe. Results. A comparison in the k, s context, i.e. comparing SN 2011kl to SN 1998bw templates in terms of luminosity and light-curve stretch, clearly shows SN 2011kl is the most luminous GRB-SN to date and is spectrally very dissimilar to other events because it is significantly bluer/hotter. Although SN 2011kl does not reach the classical luminosity threshold of SLSNe and evolves faster than any of these objects, it resembles SLSNe more than the classical GRB-associated broad-lined Type Ic SNe in several aspects. Conclusions. GRB 111209A was a very energetic event, both at early (prompt emission) and at very late (SN) times. We show in a companion publication that with the exception of the extreme duration, the GRB and afterglow parameters are in agreement with the known distributions for these parameters. SN 2011kl, on the other hand, is exceptional both in luminosity and spectral characteristics, indicating that GRB 111209A was likely not powered by a standard-model collapsar central engine, further supporting our earlier conclusions. Instead, it reveals the possibility of a direct link between GRBs and SLSNe.
APA, Harvard, Vancouver, ISO, and other styles
5

Gao, He, Xuan Ding, Xue-Feng Wu, Zi-Gao Dai, and Bing Zhang. "GRB 080503 LATE AFTERGLOW RE-BRIGHTENING: SIGNATURE OF A MAGNETAR-POWERED MERGER-NOVA." Astrophysical Journal 807, no. 2 (July 9, 2015): 163. http://dx.doi.org/10.1088/0004-637x/807/2/163.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Jordana-Mitjans, N., C. G. Mundell, C. Guidorzi, R. J. Smith, E. Ramírez-Ruiz, B. D. Metzger, S. Kobayashi, et al. "A Short Gamma-Ray Burst from a Protomagnetar Remnant." Astrophysical Journal 939, no. 2 (November 1, 2022): 106. http://dx.doi.org/10.3847/1538-4357/ac972b.

Full text
Abstract:
Abstract The contemporaneous detection of gravitational waves and gamma rays from GW170817/GRB 170817A, followed by kilonova emission a day after, confirmed compact binary neutron star mergers as progenitors of short-duration gamma-ray bursts (GRBs) and cosmic sources of heavy r-process nuclei. However, the nature (and life span) of the merger remnant and the energy reservoir powering these bright gamma-ray flashes remains debated, while the first minutes after the merger are unexplored at optical wavelengths. Here, we report the earliest discovery of bright thermal optical emission associated with short GRB 180618A with extended gamma-ray emission—with ultraviolet and optical multicolor observations starting as soon as 1.4 minutes post-burst. The spectrum is consistent with a fast-fading afterglow and emerging thermal optical emission 15 minutes post-burst, which fades abruptly and chromatically (flux density F ν ∝ t −α , α = 4.6 ± 0.3) just 35 minutes after the GRB. Our observations from gamma rays to optical wavelengths are consistent with a hot nebula expanding at relativistic speeds, powered by the plasma winds from a newborn, rapidly spinning and highly magnetized neutron star (i.e., a millisecond magnetar), whose rotational energy is released at a rate L th ∝ t −(2.22±0.14) to reheat the unbound merger-remnant material. These results suggest that such neutron stars can survive the collapse to a black hole on timescales much larger than a few hundred milliseconds after the merger and power the GRB itself through accretion. Bright thermal optical counterparts to binary merger gravitational wave sources may be common in future wide-field fast-cadence sky surveys.
APA, Harvard, Vancouver, ISO, and other styles
7

Gompertz, B. P., P. T. O'Brien, and G. A. Wynn. "Magnetar powered GRBs: explaining the extended emission and X-ray plateau of short GRB light curves." Monthly Notices of the Royal Astronomical Society 438, no. 1 (December 13, 2013): 240–50. http://dx.doi.org/10.1093/mnras/stt2165.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ma, Jing-Ze, and Bing Zhang. "Relativistic oblique shocks with ordered or random magnetic fields: tangential field governs." Monthly Notices of the Royal Astronomical Society 511, no. 1 (January 12, 2022): 925–37. http://dx.doi.org/10.1093/mnras/stac060.

Full text
Abstract:
ABSTRACT Relativistic magnetohydrodynamic shocks are efficient particle accelerators, often invoked in the models of gamma-ray bursts (GRBs) and shock-powered fast radio bursts (FRBs). Most theoretical studies assume a perpendicular shock with an ordered magnetic field perpendicular to the shock normal. However, the degree of magnetization σ and the magnetic field geometry in shock-powered GRB/FRB scenarios are still poorly constrained by observations. Analogous to the magnetization σ associated with the total field strength, we define a tangential magnetization σ⊥ associated with the tangential field component. We explore the jump conditions of magnetized relativistic shocks, either with an ordered field of arbitrary inclination angle or with a random field of arbitrary anisotropy. In either case, we find that the jump conditions of relativistic shocks are governed by the tangential magnetization σ⊥ instead of the total magnetization σ, insensitive to the inclination angles or the anisotropy of the pre-shock magnetic field. The approximated analytical solution developed in this work could serve as a quick check for numerical simulations and apply to theoretical studies of GRBs/FRBs with a more general field geometry.
APA, Harvard, Vancouver, ISO, and other styles
9

Gottlieb, Ore, Omer Bromberg, Amir Levinson, and Ehud Nakar. "Intermittent mildly magnetized jets as the source of GRBs." Monthly Notices of the Royal Astronomical Society 504, no. 3 (April 17, 2021): 3947–55. http://dx.doi.org/10.1093/mnras/stab1068.

Full text
Abstract:
ABSTRACT Gamma-ray bursts (GRBs) are powered by relativistic jets that exhibit intermittency over a broad range of time-scales – from ∼ ms to seconds. Previous numerical studies have shown that hydrodynamic (i.e. unmagnetized) jets that are expelled from a variable engine are subject to strong mixing of jet and cocoon material, which strongly inhibits the GRB emission. In this paper, we conduct 3D RMHD simulations of mildly magnetized jets with power modulation over durations of 0.1 s and 1 s, and a steady magnetic field at injection. We find that when the jet magnetization at the launching site is σ ∼ 0.1, the initial magnetization is amplified by shocks formed in the flow to the point where it strongly suppresses baryon loading. We estimate that a significant contamination can be avoided if the magnetic energy at injection constitutes at least a few per cent of the jet energy. The variability time-scales of the jet after it breaks out of the star are then governed by the injection cycles rather than by the mixing process, suggesting that in practice jet injection should fluctuate on timescales as short as ∼10 ms in order to account for the observed light curves. Better stability is found for jets with shorter modulations. We conclude that for sufficiently hot jets, the Lorentz factor near the photosphere can be high enough to allow efficient photospheric emission. Our results imply that jets with 10−2 < σ < 1 injected by a variable engine with ∼10 ms duty cycle are plausible sources of long GRBs.
APA, Harvard, Vancouver, ISO, and other styles
10

Gill, Ramandeep, and Jonathan Granot. "Gamma-Ray Bursts at TeV Energies: Theoretical Considerations." Galaxies 10, no. 3 (May 30, 2022): 74. http://dx.doi.org/10.3390/galaxies10030074.

Full text
Abstract:
Gamma-ray bursts (GRBs) are the most luminous explosions in the Universe and are powered by ultra-relativistic jets. Their prompt γ-ray emission briefly outshines the rest of the γ-ray sky, making them detectable from cosmological distances. A burst is followed by, and sometimes partially overlaps with, a similarly energetic but very broadband and longer-lasting afterglow emission. While most GRBs are detected below a few MeV, over 100 have been detected at high (≳0.1 GeV) energies, and several have now been observed up to tens of GeV with the Fermi Large Area Telescope (LAT). A new electromagnetic window in the very-high-energy (VHE) domain (≳0.1 TeV) was recently opened with the detection of an afterglow emission in the (0.1–1)TeV energy band by ground-based imaging atmospheric Cherenkov telescopes. The emission mechanism for the VHE spectral component is not fully understood, and its detection offers important constraints for GRB physics. This review provides a brief overview of the different leptonic and hadronic mechanisms capable of producing a VHE emission in GRBs. The same mechanisms possibly give rise to the high-energy spectral component seen during the prompt emission of many Fermi-LAT GRBs. Possible origins of its delayed onset and long duration well into the afterglow phase, with implications for the emission region and relativistic collisionless shock physics, are discussed. Key results for using GRBs as ideal probes for constraining models of extra-galactic background light and intergalactic magnetic fields, as well as for testing Lorentz invariance violation, are presented.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Magnetar powered GRB"

1

Jiang, Yang, Chenxi Liao, Shisheng Fu, Fan Zheng, Limin Wang, and Ming Li. "Research on Spatial Distribution in Power Frequency Magnetic Field Immunity Test." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2022. http://dx.doi.org/10.3233/faia220585.

Full text
Abstract:
At present, the automation level in the power frequency magnetic field immunity test is relatively low. The placement and rotation of the tested equipment are manually done, which has health implications on lab technicians caused by long-term exposure to magnetic fields. This paper uses finite element simulation software to study the spatial distribution of the power frequency magnetic field. We started by building a simulation model of the power frequency magnetic field, then set up the air region, copper coil material, and magnetic field parameters. As a result of the simulation, we obtained the magnetic flux density model and the magnetic field arrow diagram. We then deduced the safe operation distance of test by referencing GB 8702-2014 and the simulation result. The simulation model’s and algorithm’s effectiveness are then verified by real-world measurement results of the spatial distribution of power frequency magnetic field.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Magnetar powered GRB"

1

Cho, Benjamin, Dexter Johnson, Andrew Provenza, Carlos Morrison, and Gerald Montague. "Control Study for Five-Axis Dynamic Spin Rig Using Magnetic Bearings." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38912.

Full text
Abstract:
The NASA Glenn Research Center (GRC) has developed a magnetic bearing system for the Dynamic Spin Rig (DSR) with a fully suspended shaft that is used to perform vibration tests of turbomachinery blades and components under spinning conditions in a vacuum. Two heteroplolar radial magnetic bearings and a thrust magnetic bearing and the associated control system were integrated into the DSR to provide magnetic excitation as well as non-contact magnetic suspension of a 15.88 kg (35 lb) vertical rotor with blades to induce turbomachinery blade vibration. For rotor levitation, a proportional-integral-derivative (PID) controller with a special feature for multidirectional radial excitation worked well to both support and shake the shaft with blades. However, more advanced controllers were developed and successfully tested to determine the optimal controller in terms of sensor and processing noise reduction, smaller rotor orbits, more blade vibration amplitude, and energy savings for the system. The test results of a variety of controllers that were demonstrated up to 10,000 rpm are shown. Furthermore, rotor excitation operation andconceptual study of active blade vibration control are addressed.
APA, Harvard, Vancouver, ISO, and other styles
2

Choi, Benjamin, and Andrew Provenza. "Passive Fault Tolerance for a Magnetic Bearing Under PID Control." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0456.

Full text
Abstract:
NASA Glenn Research Center (GRC) has developed a Fault-Tolerant Magnetic Bearing Suspension rig to enhance the safety of the bearing system for multiple component failures. A simple proportional-integral-derivative (PID) controller with no fault detection mechanisms was tested in a passive way where the initial bias current and control gains for all the eight heteropolar poles were not changed for the remaining active poles in the fault situations. The action of the integral term in the controller generated autonomous corrective actions for the pole failures to return the rotor to the set point (middle position) after the failure transient. The system stability and control of the rotor position were maintained over the entire speed range, where the rotor passes through the rigid body critical speeds and other rotor disturbances, provided that there was sufficient position stiffness and damping at low speeds. As far as the summation of force vectors of two attracting forces and rotor weight is zero, the passive fault tolerance was successfully demonstrated by using as few as two active poles out of the eight independent poles from each radial bearing (that is simply, 12 out of 16 poles dead). The rotor was spun without losing stability or desired position up to the rig’s maximum allowable speed of 20,000 rpm.
APA, Harvard, Vancouver, ISO, and other styles
3

Sohn, H. S., N. K. Kim, J. J. Chae, C. H. Yeo, and J. H. Kim. "2D fully coupled analysis with magneto-thermal model for prediction of temperature distribution on UHV GIB." In 2013 2nd International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST). IEEE, 2013. http://dx.doi.org/10.1109/icepe-st.2013.6804387.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Provenza, Andrew J., and Carlos R. Morrison. "Control of Fan Blade Vibrations Using Piezoelectrics and Bi-Directional Telemetry." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-46714.

Full text
Abstract:
A novel wireless device which transfers supply power through induction to rotating operational amplifiers and transmits low voltage AC signals to and from a rotating body by way of radio telemetry has been successfully demonstrated in the NASA Glenn Research Center (GRC) Dynamic Spin Test Facility. In the demonstration described herein, a rotating operational amplifier provides controllable AC power to a piezoelectric patch epoxied to the surface of a rotating Ti plate. The amplitude and phase of the sinusoidal voltage command signal, transmitted wirelessly to the amplifier, was tuned to completely suppress the 3rd bending resonant vibration of the plate. The plate’s 3rd bending resonance was excited using rotating magnetic bearing excitation while it spun at slow speed in a vacuum chamber. A second patch on the opposite side of the plate was used as a sensor. This paper discusses the characteristics of this novel device, the details of a spin test, results from a preliminary demonstration, and future plans.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography