Improving sampling and calibration of GRBs as distance indicators

Montiel, Ariadna; Cabrera, J.; Hidalgo, Juan Carlos

doi:10.1093/mnras/staa3926

Cited by 25 publications

(26 citation statements)

References 66 publications

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“…Calibrating the above correlations permits us to use GRBs as distance indicators (Wang & Wang 2019;Montiel et al 2020;Wei & Melia 2020). Clearly, we cannot consider GRBs as standard candles, although we aim to alleviate the circularity problem by adopting model-independent calibrations by means of data set that is independent enough of H(z), for which the luminosity distance d L is not computed by assuming an a priori cosmological model.…”

Section: Calibration Of Grb Correlationsmentioning

confidence: 99%

Kinematic constraints beyond z ≃ 0 using calibrated GRB correlations

Luongo

Muccino

2020

A&A

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Context. The dynamics of the Universe are revised using high-redshift data from gamma-ray bursts to constrain cosmographic parameters by means of model-independent techniques. Aims. Considering samples from four gamma-ray burst correlations and two hierarchies up to j0 and s0, respectively, we derived limits over the expansion history of the Universe. Since cosmic data span outside z ≃ 0, we investigated additional cosmographic methods such as auxiliary variables and Padé approximations Methods. Beziér polynomials were employed to calibrate our correlations and heal the circularity problem. Several Markov chain Monte Carlo simulations were performed on the model-independently calibrated Amati, Ghirlanda, Yonetoku, and combo correlations to obtain 1 − σ and 2 − σ confidence levels and to test the standard cosmological model. Results. Reasonable results are found up to j0 and s0 hierarchies, respectively, only partially alleviating the tension on local H0 measurements as j0 hierarchy is considered. Discussions on systematic errors have been extensively reported here. Conclusions. Our findings show that the ΛCDM model is not fully confirmed using gamma-ray bursts. Indications against a genuine cosmological constant are summarized and commented on in detail.

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Section: Calibration Of Grb Correlationsmentioning

confidence: 99%

Kinematic constraints beyond z ≃ 0 using calibrated GRB correlations

Luongo

Muccino

2020

A&A

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“…These GRB luminosity indicators have been widely used as standard candles for cosmology research (Schaefer 2007;Wang et al 2007;Amati et al 2008;Amati & Della Valle 2013;Wei et al 2013;Wang et al 2017;Amati et al 2019;Muccino et al 2021;Montiel et al 2021), and it has been shown that when combined with other probes, GRBs can indeed extend the Hubble diagram to higher redshifts and help to make better constraints on cosmological parameters (Amati & Della Valle 2013;Wang et al 2015, for a review). However, since the observed GRB rate falls off rapidly at low redshifts, it is very difficult to make a robust calibration for those GRB correlations.…”

Section: Introductionmentioning

confidence: 99%

Redshift evolution of the Amati relation: Calibrated results from the Hubble diagram of quasars at high redshifts

Dai

Zheng

et al. 2021

A&A

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Gamma-ray bursts (GRBs) have long been proposed as a complementary probe to type Ia supernovae (SNe Ia) and the cosmic microwave background to explore the expansion history of the high-redshift universe, mainly because they are bright enough to be detected at greater distances. Although they lack definite physical explanations, many empirical correlations between GRB isotropic energy or luminosity and some directly detectable spectral or temporal properties have been proposed to make GRBs standard candles. Since the observed GRB rate falls off rapidly at low redshifts, this thus prevents a cosmology independent calibration of these correlations. In order to avoid the circularity problem, SN Ia data are usually used to calibrate the luminosity relations of GRBs in the low redshift region (limited by the redshift range for SN Ia sample), and then they are extrapolate the luminosity relations to the high redshift region. This approach is based on the assumption of no redshift evolution for GRB luminosity relations. In this work, we suggest the use of a complete quasar sample in the redshift range of 0.5 < z < 5.5 to test such an assumption. We divided the quasar sample into several subsamples with different redshift bins, and used each subsample to calibrate the isotropic γ-ray equivalent energy of GRBs in relevant redshift bins. By fitting the newly calibrated data, we find strong evidence that the most commonly used Amati relation between spectral peak energy and isotropic-equivalent radiated energy shows no, or marginal, evolution with redshift. Indeed, at different redshifts, the coefficients in the Amati relation could have a maximum variation of 0.93% at different redshifts, and there could be no coincidence in the range of 1σ.

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“…In Ref. [221], the E p -E iso correlation, calibrated with the latest OHD data set, has been jointly fit with CMB, BAO, and SNe Ia data in a search for cosmological parameter constraints within the standard cosmological model, as well as in dynamical dark energy parametrizations, finding no evidence in favor of the alternatives to the ΛCDM model. Finally, by using the Combo correlation with 174 GRBs calibrated in a semi-model independent way, in Ref.…”

Section: Numerical Results Using Correlationsmentioning

confidence: 99%

“…Inferred from the interpolation of the OHD data by using Bézier polynomials. b Inferred from the interpolation of the OHD data with additional systematic errors[221] by using Bézier polynomials. c Value from Ref.…”

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confidence: 99%

A Roadmap to Gamma-Ray Bursts: New Developments and Applications to Cosmology

Luongo

Muccino

2021

Galaxies

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Gamma-ray bursts are the most powerful explosions in the universe and are mainly placed at very large redshifts, up to z≃9. In this short review, we first discuss gamma-ray burst classification and morphological properties. We then report the likely relations between gamma-ray bursts and other astronomical objects, such as black holes, supernovae, neutron stars, etc., discussing in detail gamma-ray burst progenitors. We classify long and short gamma-ray bursts, working out their timescales, and introduce the standard fireball model. Afterwards, we focus on direct applications of gamma-ray bursts to cosmology and underline under which conditions such sources would act as perfect standard candles if correlations between photometric and spectroscopic properties were not jeopardized by the circularity problem. In this respect, we underline how the shortage of low-z gamma-ray bursts prevents anchor gamma-ray bursts with primary distance indicators. Moreover, we analyze in detail the most adopted gamma-ray burst correlations, highlighting their main differences. We therefore show calibration techniques, comparing such treatments with non-calibration scenarios. For completeness, we discuss the physical properties of the correlation scatters and systematics occurring during experimental computations. Finally, we develop the most recent statistical methods, star formation rate, and high-redshift gamma-ray burst excess and show the most recent constraints obtained from experimental analyses.

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Improving sampling and calibration of GRBs as distance indicators

Cited by 25 publications

References 66 publications

Kinematic constraints beyond z ≃ 0 using calibrated GRB correlations

Kinematic constraints beyond z ≃ 0 using calibrated GRB correlations

Redshift evolution of the Amati relation: Calibrated results from the Hubble diagram of quasars at high redshifts

A Roadmap to Gamma-Ray Bursts: New Developments and Applications to Cosmology

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