Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations

JQ Jiang, W Giare, S Gariazzo, MG Dainotti… - arXiv preprint arXiv …, 2024 - arxiv.org
The recent DESI Baryon Acoustic Oscillation measurements have led to tight upper limits on
the neutrino mass sum, potentially in tension with oscillation constraints requiring $\sum m …

Progenitors of Low-redshift Gamma-Ray Bursts

V Petrosian, MG Dainotti - The Astrophysical Journal Letters, 2024 - iopscience.iop.org
The bimodal distribution of the observed duration of gamma-ray bursts (GRBs) has led to the
identification of two distinct progenitors; compact star mergers, comprising either two neutron …

A Stochastic Approach to Reconstruct Gamma-Ray-burst Light Curves

MG Dainotti, R Sharma, A Narendra… - The Astrophysical …, 2023 - iopscience.iop.org
Abstract Gamma-ray bursts (GRBs), as they are observed at high redshift (z= 9.4), are vital to
cosmological studies and investigating Population III stars. To tackle these studies, we need …

Limit on supernova emission in the brightest gamma-ray burst, GRB 221009A

M Shrestha, DJ Sand, KD Alexander… - The Astrophysical …, 2023 - iopscience.iop.org
We present photometric and spectroscopic observations of the extraordinary gamma-ray
burst (GRB) 221009A in search of an associated supernova. Some past GRBs have shown …

GRB optical and X-ray plateau properties classifier using unsupervised machine learning

S Bhardwaj, MG Dainotti, S Venkatesh… - Monthly Notices of …, 2023 - academic.oup.com
The division of gamma-ray bursts (GRBs) into different classes, other than the 'short'and
'long', has been an active field of research. We investigate whether GRBs can be classified …

A Hubble Space Telescope Search for r-Process Nucleosynthesis in Gamma-ray Burst Supernovae

JC Rastinejad, W Fong, AJ Levan… - The Astrophysical …, 2024 - iopscience.iop.org
The existence of a secondary (in addition to compact object mergers) source of heavy
element (r-process) nucleosynthesis, the core-collapse of rapidly rotating and highly …

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

A Chakraborty, M Dainotti, O Cantrell… - Monthly Notices of …, 2023 - academic.oup.com
We analyse two distinct samples of gamma-ray bursts (GRBs), with and without radio
afterglow emission. We use an updated sample of 211 GRBs and find, in agreement with …

Magnetars as powering sources of gamma-ray burst associated supernovae, and unsupervized clustering of cosmic explosions

A Kumar, K Sharma, J Vinkó, D Steeghs… - Monthly Notices of …, 2024 - academic.oup.com
We present the semi-analytical light curve modelling of 13 supernovae associated with
gamma-ray bursts (GRB-SNe) along with two relativistic broad-lined (Ic-BL) SNe without …

Light Curve Properties of Gamma-Ray Burst Associated Supernovae

A Kumar, K Sharma - arXiv preprint arXiv:2411.13242, 2024 - arxiv.org
A rapidly spinning, millisecond magnetar is widely considered one of the most plausible
power sources for gamma-ray burst-associated supernovae (GRB-SNe). Recent studies …

Occurrence of gravitational collapse in the accreting neutron stars of binary-driven hypernovae

LM Becerra, F Cipolletta, CL Fryer… - The Astrophysical …, 2024 - iopscience.iop.org
The binary-driven hypernova (BdHN) model proposes long gamma-ray bursts (GRBs)
originate in binaries composed of a carbon–oxygen (CO) star and a neutron star (NS) …