Closure relations during the plateau emission of Swift GRBs and the fundamental plane

Abstract

The Neil Gehrels Swift observatory observe Gamma-Ray bursts (GRBs) plateaus in X-rays. We test the reliability of the closure relations through the fireball model when dealing with the GRB plateau emission. We analyze 455 X-ray lightcurves (LCs) collected by \emph{Swift} from 2005 (January) until 2019 (August) for which the redshift is both known and unknown using the phenomenological Willingale 2007 model. Using these fits, we analyze the emission mechanisms and astrophysical environments of these GRBs through the closure relations within the time interval of the plateau emission. Finally, we test the 3D fundamental plane relation (Dainotti relation) which connects the prompt peak luminosity, the time at the end of the plateau (rest-frame), and the luminosity at that time, on the GRBs with redshift, concerning groups determined by the closure relations. This allows us to check if the intrinsic scatter σ_{int} of any of these groups is reduced compared to previous literature. The most fulfilled environments for the electron spectral distribution, p>2, are Wind Slow Cooling (SC) and ISM Slow Cooling for cases in which the parameter q, which indicates the flatness of the plateau emission and accounts for the energy injection, is =0 and =0.5, respectively, both in the cases with known and unknown redshifts. We also find that for the sGRBs All ISM Environments with $q=0$ have the smallest σ_{int}=0.04 \pm 0.15 in terms of the fundamental plane relation holding a probability of occurring by chance of p=0.005. We have shown that the majority of GRBs presenting the plateau emission fulfil the closure relations, including the energy injection, with a particular preference for the Wind SC environment. The subsample of GRBs that fulfil given relations can be used as possible standard candles and can suggest a way to reduce the intrinsic scatter of these studied relationships.

44 pages, 23 figures; Accepted to the PASJ to be published soon

References in corpus (23)

• The Physics of Gamma-Ray Bursts and Relativistic Jets
• GRB Radiative Efficiencies Derived from the Swift Data: GRBs vs. XRFs, Long vs. Short
• A Comprehensive Analysis of the Swift/XRT Data: II. Diverse Physical Origins of the Shallow Decay Segment
• 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
• A time - luminosity correlation for Gamma Ray Bursts in the X - rays
• Klein-Nishina Effects on Optically Thin Synchrotron and Synchrotron Self-Compton Spectrum
• Constraining properties of GRB magnetar central engines using the observed plateau luminosity and duration correlation
• Properties of Gamma-Ray Burst Progenitor Stars
• Deceleration of arbitrarily magnetized GRB ejecta: the complete evolution
• A New Paradigm for Gamma Ray Bursts: Long Term Accretion Rate Modulation by an External Accretion Disk
• The X-ray fundamental plane of the Platinum Sample, the Kilonovae and the SNe Ib/c associated with GRBs
• Study of possible systematics in the L*X - Ta* correlation of Gamma Ray Bursts
• Evidence of Exponential Decay Emission in the Swift Gamma-ray Bursts
• Selection effects in Gamma Ray Bursts correlations: consequences on the ratio between GRB and star formation rates
• A case of mistaken identity? GRB 060912A and the nature of the long -- short GRB divide
• Constraints on millisecond magnetars as the engines of prompt emission in gamma-ray bursts
• Signature of a New-Born Black Hole from the Collapse of a Supra-massive Millisecond Magnetar
• Spectral and Polarization Properties of Photospheric Emission From Stratified Jets
• What can we learn from "internal plateaus"? The peculiar afterglow of GRB 070110
• Nonlinear particle acceleration and thermal particles in GRB afterglows
• GRB 110731A: Early afterglow in stellar wind powered by a magnetized outflow
• The Second Plateau in X-ray Afterglow Providing Additional Evidence for Rapidly Spinning Magnetars as the GRB Central Engine

Cited by in corpus (3)

• Standardizing Platinum Dainotti-correlated gamma-ray bursts, and using them with standardized Amati-correlated gamma-ray bursts to constrain cosmological model parameters
• $E_{\mathrm{iso}}$-$E_{\mathrm{p}}$ correlation of gamma ray bursts: calibration and cosmological applications
• The closure relations in optical afterglow of Gamma-Ray Bursts