activity
19992023
most citedA new calibration of stellar parameters of Galactic O stars

1.1k citations · 9.1k across the 131 of their papers we have counts for

collaborators

133 papers

astro-ph.HE2023

Ground-based and JWST Observations of SN 2022pul: I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova

Matthew R. Siebert, Lindsey A. Kwok, Joel Johansson +79

Nebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more…

astro-ph.HE2023★ 25 cited

Ground-based and JWST Observations of SN 2022pul: II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type-Ia Supernova

Lindsey A. Kwok, Matthew R. Siebert, Joel Johansson +78

We present an analysis of ground-based and JWST observations of SN~2022pul, a peculiar "03fg-like" (or "super-Chandrasekhar") Type Ia supernova (SN Ia), in the nebular phase at 338…

astro-ph.SR2023★ 25 cited

Modeling of the nebular-phase spectral evolution of stripped-envelope supernovae. New grids from 100 to 450 days

Luc Dessart, D. John Hillier, S. E. Woosley +1

We present an extended grid of multi-epoch 1D nonlocal thermodynamic equilibrium radiative transfer calculations for nebular-phase Type Ibc supernovae (SNe) from He-star explosions…

astro-ph.HE2023★ 23 cited

Nebular spectra from Type Ia supernova explosion models compared to JWST observations of SN 2021aefx

Stéphane Blondin, Luc Dessart, D. John Hillier +2

Recent JWST observations of the Type Ia supernova (SN Ia) 2021aefx in the nebular phase have paved the way for late-time studies covering the full optical to mid-infrared (MIR) wav…

astro-ph.SR2023★ 61 cited

X-Shooting ULLYSES: massive stars at low metallicity. I. Project Description

Jorick S. Vink, A. Mehner, P. A. Crowther +78

Observations of individual massive stars, super-luminous supernovae, gamma-ray bursts, and gravitational-wave events involving spectacular black-hole mergers, indicate that the low…

astro-ph.SR2023

Eta Carinae: the dissipating occulter is an extended structure

Theodore R. Gull, Henrik Hartman, Mairan Teodoro +10

Previous STIS long-slit observations of Eta Carinae identified numerous absorption features in both the stellar spectrum, and in the adjacent nebular spectra, along our line-of-sig…