Jet-cocoon geometry in the optically dark, very high energy gamma-ray burst 201216C

Rhodes, L.; Horst, A. J. van der; Fender, R. P.; Aguilera-Dena, David R.; Bright, J. S.; Vergani, S. D.; Williams, D.

doi:10.1093/mnras/stac1057

Cited by 16 publications

(23 citation statements)

References 76 publications

(111 reference statements)

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“…We noticed that GRB 190829A has a considerable amount of dust and gas in the local environment of its host galaxy. The observed considerable amount of dust and gas might be related to the associated VHE emission from GRB 190829A, a similar dusty environment is also seen in the case of other VHE detected bursts such as GRB 190114C (de Ugarte Postigo et al, 2020) and GRB 201216C (Rhodes et al, 2022). However, due to the limited number of VHE detected GRBs, it is still an unsolved problem whether VHE detected GRBs require unique environments to emit the VHE emission or VHE emission is only due to the burst emission mechanisms such as Synchrotron Self Compton (MAGIC Collaboration et al, 2019;Abdalla et al, 2019;de Ugarte Postigo et al, 2020;Gupta et al, 2021b).…”

Section: Comparison With Known Sample Of Host Galaxiessupporting

confidence: 63%

“…We find that GRB 190829A has a considerable amount of dust and gas in the local environment of its host galaxy. A dusty environment is also seen in the case of other VHE detected bursts such as GRB 190114C (de Ugarte Postigo et al, 2020) and GRB 201216C (Rhodes et al, 2022). It suggests that VHE detected GRBs might require a unique local environment for VHE emission to occur.…”

Section: Discussionmentioning

confidence: 82%

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Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal Optical Telescope

Gupta,

Pandey,

Kumar

et al. 2022

Preprint

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In this article, we present multi-band photometric observations and analysis of the host galaxies for a sample of five interesting gamma-ray bursts (GRBs) observed using the 3.6m Devasthal Optical Telescope (DOT) and the back-end instruments. The host galaxy observations of GRBs provide unique opportunities to estimate the stellar mass, ages, star-formation rates, and other vital properties of the burst environments and hence progenitors. We performed a detailed spectral energy distribution modelling of the five host galaxies using an advanced tool called Prospector, a stellar population synthesis model. Furthermore, we compared the results with a larger sample of well-studied host galaxies of GRBs, supernovae, and normal star-forming galaxies. Our SED modelling suggests that GRB 130603B, GRB 140102A, GRB 190829A, and GRB 200826A have massive host galaxies with high star formation rates (SFRs). On the other hand, a supernovae-connected GRB 030329 has a rare low-mass galaxy with a low star formation rate. We also find that GRB 190829A has the highest (in our sample) amount of visual dust extinction and gas in its local environment of the host, suggesting that the observed high energy emission from this burst might have a unique local environment. Broadly, the five GRBs in our sample satisfy the typical correlations between host galaxies parameters and these physical parameters are more common to normal starforming galaxies at the high-redshift Universe. Our results also demonstrate the capabilities of 3.6m DOT and the back-end instruments for the deeper photometric studies of the host galaxies of energetic transients such as GRBs, supernovae, and other transients in the long run.

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Section: Comparison With Known Sample Of Host Galaxiessupporting

confidence: 63%

Section: Discussionmentioning

confidence: 82%

Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal Optical Telescope

Gupta,

Pandey,

Kumar

et al. 2022

Preprint

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“…Such dense molecular cloud environments are also expected to be extremely dusty, with high neutral hydrogen column densities, and may also be conducive to producing VHE emission in GRBs (e.g. Rhodes et al 2022). Given the measured N 𝐻 values in GRBs (Evans et al 2009), prevalence of optically-detected GRBs and rarity of VHE-detected events, qualitatively it appears as though the high densities inferred from our modelling are instead indicative of flaws in the model.…”

Section: Discussionmentioning

confidence: 78%

“…that long GRBs typically occur in either 'wind-like' environments, with an r −2 density profile as expected for stellar winds close to the progenitor, or constant-density environments, often attributed to the interstellar medium further out (e.g., Panaitescu & Kumar 2000;Harrison et al 2001;Panaitescu & Kumar 2001Yost et al 2002;Chevalier et al 2004;Chandra et al 2008;Cenko et al 2010Cenko et al , 2011Schulze et al 2011;Laskar et al 2014a;Gompertz et al 2018;Srinivasaragavan et al 2020;Salafia et al 2021). For example, lightcurves decline more rapidly in wind-like media pre-jet break, in the spectral regime 𝜈 𝑚 < 𝜈 < 𝜈 𝑐 (between the peak and cooling synchrotron break frequencies).…”

mentioning

confidence: 93%

Towards an understanding of long gamma-ray burst environments through circumstellar medium population synthesis predictions

Chrimes,

Gompertz,

Kann

et al. 2022

Preprint

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The temporal and spectral evolution of gamma-ray burst (GRB) afterglows can be used to infer the density and density profile of the medium through which the shock is propagating. In long-duration (core-collapse) GRBs, the circumstellar medium (CSM) is expected to resemble a wind-blown bubble, with a termination shock separating the stellar wind and the interstellar medium (ISM). A long standing problem is that flat density profiles, indicative of the ISM, are often found at lower radii than expected for a massive star progenitor. Furthermore, the presence of both wind-like environments at high radii and ISM-like environments at low radii remains a mystery. In this paper, we perform a 'CSM population synthesis' with long GRB progenitor stellar evolution models. Analytic results for the evolution of wind blown bubbles are adjusted through comparison with a grid of 2D hydrodynamical simulations. Predictions for the emission radii, ratio of ISM to wind-like environments, wind and ISM densities are compared with the largest sample of afterglow-derived parameters yet compiled, which we make available for the community. We find that high ISM densities of 𝑛 ∼ 1000 cm −3 best reproduce observations. If long GRBs instead occur in typical ISM densities of 𝑛 ∼ 1 cm −3 , then the discrepancy between theory and observations is shown to persist at a population level. We discuss possible explanations for the origin of variety in long GRB afterglows, and for the overall trend of CSM modelling to over-predict the termination shock radius.

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“…that long GRBs typically occur in either 'wind-like' environments, with an r −2 density profile as expected for stellar winds close to the progenitor, or constant-density environments, often attributed to the interstellar medium further out (e.g., Panaitescu & Kumar 2000;Harrison et al 2001;Panaitescu & Kumar 2001Yost et al 2002;Chevalier et al 2004;Chandra et al 2008;Cenko et al 2010Cenko et al , 2011Schulze et al 2011;Laskar et al 2014a;Gompertz et al 2018;Srinivasaragavan et al 2020;Salafia et al 2021). For example, lightcurves decline more rapidly in wind-like media pre-jet break, in the spectral regime < < (between the peak and cooling synchrotron break frequencies).…”

mentioning

confidence: 89%

Towards an understanding of long gamma-ray burst environments through circumstellar medium population synthesis predictions

Chrimes

Gompertz

Канн

et al. 2022

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

The temporal and spectral evolution of gamma-ray burst (GRB) afterglows can be used to infer the density and density profile of the medium through which the shock is propagating. In long-duration (core-collapse) GRBs, the circumstellar medium (CSM) is expected to resemble a wind-blown bubble, with a termination shock separating the stellar wind and the interstellar medium (ISM). A long standing problem is that flat density profiles, indicative of the ISM, are often found at lower radii than expected for a massive star progenitor. Furthermore, the presence of both wind-like environments at high radii and ISM-like environments at low radii remains a mystery. In this paper, we perform a ‘CSM population synthesis’ with long GRB progenitor stellar evolution models. Analytic results for the evolution of wind blown bubbles are adjusted through comparison with a grid of 2D hydrodynamical simulations. Predictions for the emission radii, ratio of ISM to wind-like environments, wind and ISM densities are compared with the largest sample of afterglow-derived parameters yet compiled, which we make available for the community. We find that high ISM densities of n ∼ 1000 cm−3 best reproduce observations. If long GRBs instead occur in typical ISM densities of n ∼ 1 cm−3, then the discrepancy between theory and observations is shown to persist at a population level. We discuss possible explanations for the origin of variety in long GRB afterglows, and for the overall trend of CSM modelling to over-predict the termination shock radius.

show abstract

Jet-cocoon geometry in the optically dark, very high energy gamma-ray burst 201216C

Cited by 16 publications

References 76 publications

Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal Optical Telescope

Photometric studies on the host galaxies of gamma-ray bursts using 3.6m Devasthal Optical Telescope

Towards an understanding of long gamma-ray burst environments through circumstellar medium population synthesis predictions

Towards an understanding of long gamma-ray burst environments through circumstellar medium population synthesis predictions

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