Relativistic Supernova Ejecta Colliding with a Circumstellar Medium: An Application to the Low-luminosity GRB 171205A

Suzuki, Akihiro; Maeda, Keiichi; Shigeyama, Toshikazu

doi:10.3847/1538-4357/aaef85

Cited by 25 publications

(11 citation statements)

References 96 publications

(108 reference statements)

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“…We argue the GRB 171205A/SN 2017iuk event occurred in a stellar wind environment induced by the progenitor prior to its core-collapse (see also Suzuki et al 2019). The radio spectral evolution in the first five epochs, in particular, the emergence of the 𝛼 = 1/3 slope in the fourth and fifth SED, was due to the passage of the self-absorption frequency, 𝜈 sa , across the gigahertz frequency range.…”

Section: Grb 171205a/sn 2017iuk Interpretationmentioning

confidence: 76%

A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder

Leung,

Murphy,

Ghirlanda

et al. 2021

Preprint

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We present a search for radio afterglows from long gamma-ray bursts using the Australian Square Kilometre Array Pathfinder (ASKAP). Our search used the Rapid ASKAP Continuum Survey, covering the entire celestial sphere south of declination +41 • , and three epochs of the Variables and Slow Transients Pilot Survey (Phase 1), covering ∼ 5, 000 square degrees per epoch. The observations we used from these surveys spanned a nine-month period from 2019 April 21 to 2020 January 11. We crossmatched radio sources found in these surveys with 779 well-localised (to ≤ 15 ) long gamma-ray bursts occurring after 2004 and determined whether the associations were more likely afterglow-or host-related through the analysis of optical images. In our search, we detected one radio afterglow candidate associated with GRB 171205A, a local low-luminosity gamma-ray burst with a supernova counterpart SN 2017iuk, in an ASKAP observation 511 days post-burst. We confirmed this detection with further observations of the radio afterglow using the Australia Telescope Compact Array at 859 days and 884 days post-burst. Combining this data with archival data from early-time radio observations, we showed the evolution of the radio spectral energy distribution alone could reveal clear signatures of a wind-like circumburst medium for the burst. Finally, we derived semi-analytical estimates for the microphysical shock parameters of the burst: electron power-law index 𝑝 = 2.84, normalised wind-density parameter 𝐴 * = 3, fractional energy in electrons 𝜖 𝑒 = 0.3, and fractional energy in magnetic fields 𝜖 𝐵 = 0.0002.

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Section: Grb 171205a/sn 2017iuk Interpretationmentioning

confidence: 76%

A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder

Leung,

Murphy,

Ghirlanda

et al. 2021

Preprint

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“…The physical origin of LLGRBs is still unresolved. Unlike previous attempts, which involve a special change of the GRB jet radiation or dynamics (e.g., models involving a chocked jet, Bromberg et al 2012;Nakar 2015; a long-lived central engine powering a mildly relativistic jet, Irwin & Chevalier 2016; or the collision between the relativistic ejecta and circumstellar medium, Suzuki et al 2019), our model, by 1 0 4 8 1 0 5 0 1 0 5 2 1 0 5 4 0 . 0 1 only introducing the stellar companion's reflection effect, can naturally reproduce the observed LLGRBs.…”

Section: Case IImentioning

confidence: 99%

Gamma-Ray Burst in a Binary System

Zou,

Zhang,

Huang

et al. 2021

Preprint

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Typical models of gamma-ray bursts (GRBs) assume that they happen in isolated central engine systems, with little attention being paid to the fact that most stars (including those evolving as GRB progenitors) are in binary or multi-body systems. This paper will study in detail the observational effects when a GRB occurs in a binary system. We show that the blockage by the companion star becomes nonnegligible when it is located within a typical GRB jet opening angle (e.g., 10 degrees) and at an orbit of 67 au, assuming the GRB emission site is at 10 15 cm radius. In such a case, an on-axis observer will see a GRB with a similar temporal behavior but 25% dimmer. On the other hand, an off-axis observer outside the jet opening angle (hence missed the original GRB) can see a delayed "reflected" GRB, which is much fainter in brightness, much wider in the temporal profile and slightly softer in energy. Our study can naturally explain the origin of some low-luminosity GRBs. Moreover, we also point out that the companion star may be shocked if it is located inside the GRB emission site, which can give rise to an X-ray transient or a GRB followed by a delayed X-ray bump on top of X-ray afterglows.

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“…Recently proposed models for GRB 060218 include a low-power jet (Irwin & Chevalier 2016) as well as mildly relativistic shock breakout powered by a jet that is choked in an extended stellar envelope (Nakar 2015). In the case of GRB 171205A, Izzo et al (2019) interpret the blackbody component as emission from a cocoon, while Suzuki et al (2019) propose that the full multiwavelength emission is due to interaction between relativistic ejecta and the circumstellar medium.…”

Section: Peculiar and Unclear Casesmentioning

confidence: 99%

A comprehensive view of blackbody components in the X-ray spectra of GRBs

Valan,

Larsson

2021

Preprint

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A small fraction of gamma-ray bursts (GRBs) exhibit blackbody emission in the X-ray spectra, the origin of which is debated. In order to gain a more complete understanding of this phenomenon, we present a search for blackbody components in 116 GRBs with known redshifts observed by Swift XRT. A time-resolved spectral analysis is carried out and the significance of the blackbody is assessed with respect to an absorbed power-law model. We report nine new detections and confirm the previously reported blackbody in GRB 171205A. Together with our previous results, there are a total of 19 GRBs with significant blackbody emission in a sample of 199 GRBs observed by Swift over 13 years. The detections include one short GRB and two low-luminosity GRBs. We estimate fireball parameters from the blackbody components and note that the blackbody luminosity is correlated with the temperature and inferred Lorentz factor. There is a large spread in the properties of the blackbody components and the light curves, which points to different origins for the emission. In about a third of the GRBs, the blackbody is clearly associated with late prompt emission from the jet. The rest of the sample includes cases that are fully consistent with the expectations from a cocoon, as well cases that may be explained by high-latitude emission or more energetic cocoons. These results indicate that thermal emission is associated with all parts of the jet.

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Relativistic Supernova Ejecta Colliding with a Circumstellar Medium: An Application to the Low-luminosity GRB 171205A

Cited by 25 publications

References 96 publications

A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder

A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder

Gamma-Ray Burst in a Binary System

A comprehensive view of blackbody components in the X-ray spectra of GRBs

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