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Model-independent bounds on the Hubble constant $H_0$ are important to shed light on cosmological tensions. We work out a model-independent analysis based on the sum rule, which is applied to late- and early-time data catalogs to determine…

宇宙学与河外天体物理 · 物理学 2025-09-17 Orlando Luongo , Marco Muccino

We present a new method aimed to handle long Gamma-Ray Burst (GRBs) as cosmic rulers. The recent discovery of a tight correlation between the collimation corrected GRB energy and the peak of the gamma-ray spectrum has opened the possibility…

天体物理学 · 物理学 2009-11-10 C. Firmani , G. Ghisellini , G. Ghirlanda , V. Avila-Reese

Machine learning offers an exciting opportunity to improve the calibration of nearly all reconstructed objects in high-energy physics detectors. However, machine learning approaches often depend on the spectra of examples used during…

高能物理 - 唯象学 · 物理学 2022-09-02 Rikab Gambhir , Benjamin Nachman , Jesse Thaler

Cosmological models and their parameters are widely debated, especially about whether the current discrepancy between the values of the Hubble constant, $H_{0}$, obtained by type Ia supernovae (SNe Ia), and the Planck data from the Cosmic…

This paper presents a systematic literature review focusing on the application of machine learning techniques for deriving observational constraints in cosmology. The goal is to evaluate and synthesize existing research to identify…

宇宙学与河外天体物理 · 物理学 2025-10-14 Luis Rojas , Sebastián Espinoza , Esteban González , Carlos Maldonado , Fei Luo

Thanks to their enormous energy release which allows to detect them up to very high redshift, Gamma Rays Bursts (GRBs) have recently attracted a lot of interest to probe the Hubble diagram (HD) deep into the matter dominated era and hence…

宇宙学与河外天体物理 · 物理学 2015-05-28 V. F. Cardone , M. Perillo , S. Capozziello

The use of mathematical models to make predictions about tumor growth and response to treatment has become increasingly more prevalent in the clinical setting. The level of complexity within these models ranges broadly, and the calibration…

定量方法 · 定量生物学 2021-12-28 Allison L. Lewis , Kathleen M. Storey , Heyrim Cho , Anna C. Zittle

The field of machine learning has drawn increasing interest from various other fields due to the success of its methods at solving a plethora of different problems. An application of these has been to train artificial neural networks to…

宇宙学与河外天体物理 · 物理学 2023-03-21 Augusto T. Chantada , Susana J. Landau , Pavlos Protopapas , Claudia G. Scóccola , Cecilia Garraffo

Gravitational microlensing of gamma-ray bursts (GRBs) provides a unique opportunity to probe compact dark matter and small-scale structures in the Universe. However, identifying such microlensed GRBs within large data sets is a significant…

高能天体物理现象 · 物理学 2025-10-20 Mohammad H. Zhoolideh Haghighi , Zeinab Kalantari , Sohrab Rahvar , Alaa Ibrahim

Gamma-ray bursts (GRBs), as a possible probe to extend the Hubble diagram to high redshifts, have attracted much attention recently. In this paper, we select two samples of GRBs that have a plateau phase in X-ray afterglow. One is short…

宇宙学与河外天体物理 · 物理学 2021-08-11 J. P. Hu , F. Y. Wang , Z. G. Dai

To fully take advantage of the data provided by large-scale structure surveys, we need to quantify the potential impact of baryonic effects, such as feedback from active galactic nuclei (AGN) and star formation, on cosmological observables.…

Calibration is a common experimental physics problem, whose goal is to infer the value and uncertainty of an unobservable quantity Z given a measured quantity X. Additionally, one would like to quantify the extent to which X and Z are…

高能物理 - 唯象学 · 物理学 2023-09-26 Rikab Gambhir , Benjamin Nachman , Jesse Thaler

An improved Amati correlation was constructed in (ApJ 931 (2022) 50) by us recently. In this paper, we further study constraints on the $\Lambda$CDM and $w$CDM models from the gamma ray bursts (GRBs) standardized with the standard and…

宇宙学与河外天体物理 · 物理学 2022-08-17 Yang Liu , Nan Liang , Xiaoyao Xie , Zunli Yuan , Hongwei Yu , Puxun Wu

A new method to constrain the cosmological equation of state is proposed by using combined samples of gamma-ray bursts (GRBs) and supernovae (SNeIa). The Chevallier-Polarski-Linder parameterization is adopted for the equation of state in…

宇宙学与河外天体物理 · 物理学 2010-01-09 L. Izzo , S. Capozziello , G. Covone , M. Capaccioli

Although Gaussian processes (GPs) with deep kernels have been successfully used for meta-learning in regression tasks, its uncertainty estimation performance can be poor. We propose a meta-learning method for calibrating deep kernel GPs for…

机器学习 · 统计学 2023-12-14 Tomoharu Iwata , Atsutoshi Kumagai

We use the measurement of gamma-ray burst (GRB) distances to constrain dark energy cosmological model parameters. We employ two methods for analyzing GRB data - fitting luminosity relation of GRBs in each cosmology and using distance…

宇宙学与河外天体物理 · 物理学 2010-04-30 Lado Samushia , Bharat Ratra

In this work, two different models, one with cosmological constant $\Lambda$, and baryonic and dark matter (with $\omega_{dm} \neq 0$), and the other with an $X$ dark energy (with $\omega_{de} \neq -1$), and baryonic and dark matter (with…

宇宙学与河外天体物理 · 物理学 2021-04-05 Emilio Elizalde , Janusz Gluza , Martiros Khurshudyan

In the context of cosmography approach and using the data of Hubble diagram for supernovae, quasars and gamma-ray bursts, we study some DE parametrizations and also the concordance $\Lambda$CDM universe. Using the different combinations of…

宇宙学与河外天体物理 · 物理学 2020-09-09 Mehdi Rezaei , Saeed Pour Ojaghi , Mohammad Malekjani

Linear mixed models (LMMs) are a popular class of methods for analyzing longitudinal and clustered data. However, such models can be sensitive to outliers, and this can lead to biased inference on model parameters and inaccurate prediction…

统计方法学 · 统计学 2025-03-28 Shonosuke Sugasawa , Francis K. C. Hui , Alan H. Welsh

We use Gamma Ray Bursts (GRBs) data from Y. Wang (2008) to put additional constraints on a set of cosmological dark energy models based on the holographic principle. GRBs are among the most complex and energetic astrophysical events known…

宇宙学与河外天体物理 · 物理学 2016-02-12 Alexander Bonilla Rivera , Jairo Ernesto Castillo Hernandez