Radio-bright versus radio-dark gamma-ray bursts – more evidence for distinct progenitors

Chakraborty, Angana; Dainotti, Maria Giovanna; Cantrell, Olivia; Lloyd-Ronning, Nicole M.

doi:10.1093/mnras/stad438

Cited by 4 publications

(6 citation statements)

References 75 publications

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“…Lloyd-Ronning et al (2019b) confirmed this in a subsample of radio-bright GRBs with isotropic equivalent energies above 10 52 erg. Recently Chakraborty et al (2023) further confirmed this trend, employing different techniques to account for data selection effects that could have artificially produced this intrinsic duration-redshift anticorrelation.…”

Section: Introductionmentioning

confidence: 79%

“…In their radio-bright subsample consisting of 79 GRBs, they found a ∼5σ correlation (p-value ∼ 5 × 10 −5 ), with T int ∝ (1 + z) −1.4±0.3 . Recently, Chakraborty et al (2023) reanalyzed this correlation with an updated, larger sample of radio-bright and radio-dark GRBs, using a variety of approaches to account for selection effects. Even with fairly stringent and conservative assumptions about the biases, they found the correlation still exists, with T int ∝ (1 + z) −1.3±0.3 (p-value of 10 −6 ) for the radio-bright GRB sample and T int ∝ (1 + z) −1.2±0.4 (p-value of 10 −3 ) for the radio-dark sample.…”

Section: Lloydmentioning

confidence: 99%

“…One key approach to answering this question is to examine the evolution of GRB properties over cosmic time, and attempt to understand that evolution in the context of particular progenitor systems. For example, the evolution of GRB jet opening angle with redshift (Lü et al 2012;Laskar et al 2014Laskar et al , 2018aLaskar et al , 2018bLloyd-Ronning et al 2019b;Chakraborty et al 2023) connects GRBs with massive stars in a unique way. Lloyd-Ronning et al (2020) showed that the smaller jet opening angles at higher redshifts can be quantitatively explained by a massive star's envelope collimating the jet, and this is consistent with evolving models for the initial mass function reported in the literature (e.g., Davé 2008).…”

Section: Introductionmentioning

confidence: 99%

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On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts

Lloyd-Ronning

Johnson

Cheng

et al. 2023

ApJ

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For gamma-ray bursts (GRBs) with durations greater than two seconds (so-called long GRBs), the intrinsic prompt gamma-ray emission appears, on average, to last longer for bursts at lower redshifts. We explore the nature of this duration–redshift anticorrelation, describing systems and conditions in which this cosmological evolution could arise. In particular, we explore its dependence on the metallicity of a massive star progenitor, because we can securely count on the average stellar metallicity to increase with decreasing redshift. Although stars with higher metallicity/lower redshift lose mass and angular momentum through line-driven winds, in some cases these stars are able to form more extended accretion disks when they collapse, potentially leading to longer-duration GRBs. We also examine how this duration–redshift trend may show up in interacting binary models composed of a massive star and compact object companion, recently suggested to be the progenitors of radio-bright GRBs. Under certain conditions, mass loss and equation-of-state effects from massive stars with higher metallicity and lower redshift can decrease the binary separation. This can then lead to spin-up of the massive star and allow for a longer-duration GRB upon the massive star’s collapse. Finally, the duration–redshift trend may also be supported by a relatively larger population of small-separation binaries born in situ at low redshift.

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Section: Introductionmentioning

confidence: 79%

Section: Lloydmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts

Lloyd-Ronning

Johnson

Cheng

et al. 2023

ApJ

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“…This will provide a The previous studies have found that E iso , L iso , and θ jet are affected by redshift evolution and selection biases (Lloyd-Ronning et al 2002;Wei & Gao 2003;Yonetoku et al 2004;Zhang et al 2014;Lloyd-Ronning et al 2019;Guo et al 2020;Liu et al 2021;Chakraborty et al 2023). A nonparametric τ statistical technique has been widely used to resolve this problem (Lynden-Bell 1971;Lloyd-Ronning et al 2002;Wei & Gao 2003;Yonetoku et al 2004;Dainotti et al 2013;Zhang et al 2014;Lloyd-Ronning et al 2019;Dainotti et al 2021;Liu et al 2021;Chakraborty et al 2023). In order to separate the…”

Section: Three-parameter Correlationsmentioning

confidence: 99%

“…The values E iso,c ≡ E iso /g k (z), L iso,c ≡ L iso /g k (z), and θ jet,c ≡ θ jet /g k (z) represent the isotropic energy, peak luminosity, and opening angle after removing the evolution effect, respectively. For the SGRB sample, we take k E = 5.79 (Liu et al 2021), k L = 4.78 (Guo et al 2020), and k θ = 1.45 (Chakraborty et al 2023). Because the data of the LGRB sample are mainly from the Konus-Wind instrument, we take k E = 1.73 and k L = 3.24 from Xue et al (2019) for LGRBs.…”

Section: Three-parameter Correlationsmentioning

confidence: 99%

The Intrinsic Statistical Properties and Correlations of Short Gamma-Ray Bursts

Zhu

Liu

Shi

et al. 2023

ApJ

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The intrinsic statistical properties and correlations of short gamma-ray bursts (SGRBs) have not been fully determined, due to the limitations of observations. In this paper, we compile a more extensive sample of 82 SGRBs with measured redshifts and present a comprehensive study of their intrinsic characteristics. We obtain the median values of the intrinsic duration (T 90,z), peak energy (E p,z), isotropic energy (E iso), and peak luminosity (L iso) as 0.47 s, 466 keV, 8.21 ×1050 erg, and 3.22 × 1051 erg s−1, respectively. We update the spectrum–energy correlations, and report E p , z ∝ E iso 0.36 ± 0.05 and E p , z ∝ L iso 0.33 ± 0.04 , which further confirm the previous results that the E p,z–E iso correlations of SGRBs and long gamma-ray bursts (LGRBs) are different and that this correlation can be used to distinguish GRB types. We report for the first time that there is a tighter correlation between the isotropic energy of the prompt emission of SGRBs and the star formation rate of their host galaxies, which reads sSFR ∝ E iso 0.38 ± 0.11 . Using the measured jet break time (t jet) of 11 SGRBs, we tentatively investigate the E iso–E p,z–t jet,z and L iso–E p,z–t jet,z correlations of SGRBs and find that three-parameter correlations of SGRBs also exist and are different from those of LGRBs. Based on the E iso–E p,z–t jet,z correlation, we estimate the t jet,z values of other SGRBs and calculate the opening angles of SGRBs. We find that the median value of the SGRB opening angle is 7.°5, which is larger than that of LGRBs.

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White dwarf–black hole binary progenitors of low-redshift gamma-ray bursts

Lloyd-Ronning,

Johnson,

Upton Sanderbeck

et al. 2024

Monthly Notices of the Royal Astronomical Society

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Although there is strong evidence that many long GRBs are associated with the collapse of a massive star, tantalizing results in recent years have upended the direct association of all long GRBs with massive stars. In particular, kilonova signals in some long GRB light curves as well as a suggested uptick in the rate density of long GRBs at low redshifts (deviating significantly from the star formation rate) suggest that compact object mergers may be a non-negligible fraction of the long GRB population. Here we investigate the contribution of white dwarf-black hole mergers to the long GRB population. We present evidence for the deviation of the long GRB rate density from the star formation rate at low redshifts, and provide analytic and numerical arguments for why a white dwarf-black hole merger system may be a viable progenitor to explain this deviation. We show the range of parameter space in which the durations, energetics, and rates of these systems can account for a significant sub-population of low-redshift long GRBs.

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Radio-bright versus radio-dark gamma-ray bursts – more evidence for distinct progenitors

Cited by 4 publications

References 75 publications

On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts

On the Anticorrelation between Duration and Redshift in Gamma-Ray Bursts

The Intrinsic Statistical Properties and Correlations of Short Gamma-Ray Bursts

White dwarf–black hole binary progenitors of low-redshift gamma-ray bursts

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