185 citations · 1k across the 29 of their papers we have counts for
30 papers
A JWST/MIRI Study of Dust in a Sample of Normal Type IIP Core Collapse Supernovae
Bhagya M. Subrayan, David J. Sand, Olivia Culbert +24
Core collapse supernovae (CCSNe) are invoked as major dust producers in the early Universe, yet the amount of dust they form, the timescale over which it grows, and the physical co…
First Results from the LSST Shadow Survey: The Restless Luminous Blue Variable AT2017des in the Virgo-Cluster Galaxy, NGC4532
Conor L. Ransome, Bhagya M. Subrayan, David J. Sand +66
The Legacy Survey of Space and Time (LSST) will start in late-summer 2026, revolutionizing transient astronomy. Here, we present the Dark Energy Camera (DECam) Shadow Survey, which…
JWST spectroscopy of SN 2010da/NGC 300 ULX-1: a surviving star hidden by dust
Emma R. Beasor, Ryan Lau, Nathan Smith +3
We present new James Webb Space Telescope () NIRSpec and MIRI integral-field spectroscopy of the remarkable system SN~2010da / NGC~300 ULX-1, the only known ultraluminous X-r…
The fate of the failed supernova candidate M31-2014-DS1
Emma R. Beasor, Nathan Smith, Jeniveve Pearson +4
The fate of massive stars above 20M remains uncertain. Debate persists about whether they die as supernovae (SNe), or if they collapse directly into black holes (BHs) wit…
Multiwavelength Modeling of the Luminous Fast Blue Optical Transient AT2024wpp
Conor M. B. Omand, Nikhil Sarin, Gavin P. Lamb +14
Luminous fast blue optical transients (LFBOTs) are a growing class of enigmatic energetic transients. They show fast rises and declines, high temperatures throughout their evolutio…
Quantifying Systematic Age Discrepancies in Very Young Star Clusters
Joseph Guzman, Jeremiah Murphy, Emma Beasor +5
We infer the ages of three young stellar clusters, NGC 2004, NGC 7419, and NGC 2100, using Stellar Ages, a statistical algorithm designed to infer stellar population properties fro…
Mid-Infrared Dust Evolution and Late-time Circumstellar Medium Interaction in SN 2017eaw
Jeniveve Pearson, Bhagya Subrayan, David J. Sand +24
We present JWST/MIRI and complementary ground-based near-infrared observations of the Type II SN 2017eaw taken 6 years post-explosion. SN 2017eaw is still detected out to 25 m a…
The red supergiant progenitor luminosity problem
Emma R. Beasor, Nathan Smith, Jacob E. Jencson
Analysis of pre-explosion imaging has confirmed red supergiants (RSGs) as the progenitors to Type II-P supernovae (SNe). However, extracting the RSG's luminosity requires assumptio…
One Year of SN 2023ixf: Breaking Through the Degenerate Parameter Space in Light-Curve Models with Pulsating Progenitors
Brian Hsu, Nathan Smith, Jared A. Goldberg +21
We present and analyze the extensive optical broadband photometry of the Type II SN 2023ixf up to one year after explosion. We find that, when compared to two pre-existing model gr…
JWST reveals a luminous infrared source at the position of the failed supernova candidate N6946-BH1
Emma R. Beasor, Griffin Hosseinzadeh, Nathan Smith +4
N6946-BH1 is the first plausible candidate for a failed supernova (SN), a peculiar event in which a massive star disappears without the expected bright SN, accompanied by collapse…
A Luminous Red Supergiant and Dusty Long-period Variable Progenitor for SN 2023ixf
Jacob E. Jencson, Jeniveve Pearson, Emma R. Beasor +23
We analyze pre-explosion near- and mid-infrared (IR) imaging of the site of SN 2023ixf in the nearby spiral galaxy M101 and characterize the candidate progenitor star. The star dis…
Don't believe the hype(r): The Yellow Supergiants of Westerlund 1
Emma R. Beasor, Nathan Smith, Jennifer E. Andrews
Yellow hypergiants (YHGs) are often presumed to represent a transitional post-red supergiant (RSG) phase for stars 30-40 \msun. Here we present visual-wavelength echelle spec…
The extreme scarcity of dust-enshrouded red supergiants: consequences for producing stripped stars via winds
Emma R. Beasor, Nathan Smith
Quiescent mass-loss during the red supergiant (RSG) phase has been shown to be far lower than prescriptions typically employed in single-star evolutionary models. Importantly, RSG…
Red Supergiants in M31: The Humphreys-Davidson limit at high metallicity
Sarah L. E. McDonald, Ben Davies, Emma R. Beasor
The empirical upper limit to Red Supergiant (RSG) luminosity, known as the Humphreys-Davidson (HD) limit, has been commonly explained as being caused by the stripping of stellar en…
An Exceptional Dimming Event for a Massive, Cool Supergiant in M51
Jacob E. Jencson, David J. Sand, Jennifer E. Andrews +6
We present the discovery of an exceptional dimming event in a cool supergiant star in the Local Volume spiral M51. The star, dubbed M51-DS1, was found as part of a Hubble Space Tel…
The impact of realistic red supergiant mass-loss on stellar evolution
Emma R. Beasor, Ben Davies, Nathan Smith
Accurate mass-loss rates are essential for meaningful stellar evolutionary models. For massive single stars with initial masses between 8 - 30\msun the implementation of cool super…
The Age of Westerlund 1 Revisited
Emma R. Beasor, Ben Davies, Nathan Smith +2
The cluster Westerlund~1 (Wd1) is host to a large variety of post main-sequence (MS) massive stars. The simultaneous presence of these stars can only be explained by stellar models…
On `On the Red Supergiant Problem': a rebuttal, and a consensus on the upper mass cutoff for II-P progenitors
Ben Davies, Emma Beasor
The `Red Supergiant Problem' describes the claim that the brightest Red Supergiant (RSG) progenitors to type II-P supernovae are significantly fainter than RSGs in the field. This…
On aging star clusters using red supergiants independent of the fraction of interacting binary stars
J. J. Eldridge, Emma R. Beasor, N. Britavskiy
We use the Binary Population and Spectral Synthesis (BPASS) models to test the recent suggestion that red supergiants can provide an accurate age estimate of a co-eval stellar popu…
A new mass-loss rate prescription for red supergiants
Emma R. Beasor, Ben Davies, Nathan Smith +3
Evolutionary models have shown the substantial effect that strong mass-loss rates () can have on the fate of massive stars. Red supergiant (RSG) mass-loss is poorly unders…
The `Red Supergiant Problem': the upper luminosity boundary of type-II supernova progenitors
Ben Davies, Emma R. Beasor
By comparing the properties of Red Supergiant (RSG) supernova progenitors to those of field RSGs, it has been claimed that there is an absence of progenitors with luminosities …
The distances to star-clusters hosting Red Supergiants: Per, NGC 7419, and Westerlund 1
Ben Davies, Emma Beasor
Galactic, young massive star clusters are approximately coeval aggregates of stars, close enough to resolve the individual stars, massive enough to have produced large numbers of m…
Discrepancies in the ages of young star clusters; evidence for mergers?
Emma R. Beasor, Ben Davies, Nathan Smith +1
There is growing evidence that star clusters can no longer be considered simple stellar populations (SSPs). Intermediate and old age clusters are often found to have extended main…
A critical re-evaluation of the Thorne-Żytkow object candidate HV 2112
Emma R. Beasor, Ben Davies, Ivan Cabrera-Ziri +1
It has been argued in the literature that the star HV~2112 in the Small Magellanic Cloud is the first known example of a TŻO, a Red Supergiant with a degenerate neutron core. This…