Probing the progenitor of high-$z$ short-duration GRB 201221D and its possible bulk acceleration in prompt emission

Abstract

The growing observed evidence shows that the long- and short-duration gamma-ray bursts (GRBs) originate from massive star core-collapse and the merger of compact stars, respectively. GRB 201221D is a short-duration GRB lasting $\sim 0.1$ s without extended emission (EE) at high redshift $z=1.046$. By analyzing data observed with the Swift/BAT and Fermi/GBM, we find that a cutoff power-law model can adequately fit the spectrum with a soft $E_{\mathrm{p}}=113_{-7}^{+9}$ keV, and isotropic energy $E_{\gamma ,iso}=1.36_{-0.14}^{+0.17}\times 10^{51}\mathrm{erg}$. In order to reveal the possible physical origin of GRB 201221D, we adopted multi-wavelength criteria (e.g., Amati relation, $\epsilon$-parameter, amplitude parameter, local event rate density, luminosity function, and properties of the host galaxy), and find that most of the observations of GRB 201221D favor a compact star merger origin. Moreover, we find that $\hat{\alpha }$ is larger than $2+\hat{\beta }$ in the prompt emission phase which suggests that the emission region is possibly undergoing acceleration during the prompt emission phase with a Poynting-flux-dominated jet.

15 pages, 3 tables, 11 Figures. Accepted for published in RAA

References in corpus (27)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
• Long gamma-ray bursts and core-collapse supernovae have different environments
• The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
• Discerning the physical origins of cosmological Gamma-ray bursts based on multiple observational criteria: the cases of z=6.7 GRB 080913, z=8.3 GRB 090423, and some short/hard GRBs
• Magnetic acceleration of ultra-relativistic jets in gamma-ray burst sources
• The Fourth Fermi-GBM Gamma-Ray Burst Catalog: A Decade of Data
• The rate, luminosity function and time delay of non-Collapsar short GRBs
• A Comprehensive Analysis of Fermi Gamma-Ray Burst Data. I. Spectral Components and Their Possible Physical Origins of LAT/GBM GRBs
• The Millisecond Magnetar Central Engine in short GRBs
• The First Swift BAT Gamma-Ray Burst Catalog
• A comprehensive analysis of Swift/XRT data: I. Apparent spectral evolution of GRB X-ray tails
• Hyper-accreting black hole as GRB central engine. I: Baryon loading in GRB jets
• Low-Luminosity Gamma-Ray Bursts as a Distinct GRB Population:A Firmer Case from Multiple Criteria Constraints
• Photosphere emission from a hybrid relativistic outflow with arbitrary dimensionless entropy and magnetization in GRBs
• Astrophysics: A burst of new ideas
• A Peculiarly Short-duration Gamma-Ray Burst from Massive Star Core Collapse
• A novel paradigm for short gamma-ray bursts with extended X-ray emission
• A Comparative Study of Long and Short GRBs. I. Overlapping Properties
• A comparative study of host galaxy properties between Fast Radio Bursts and stellar transients
• Signature of a New-Born Black Hole from the Collapse of a Supra-massive Millisecond Magnetar
• Testing High-latitude Curvature Effect of Gamma-Ray Bursts with {\it Fermi} Data: Evidence of Bulk Acceleration in Prompt Emission
• Evidence of extended emission in GRB 181123B and other high-redshift short GRBs
• Short Gamma-Ray Bursts following mergers of an ONeMg with a CO white dwarf
• {\em Fermi}/GBM Short Gamma-ray Burst Catalog and Case Study for GRB 170817A/GW 170817

Cited by in corpus (2)

• GRB 221009A: An ordinary nearby GRB with extraordinary observational properties
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