27 citations · 169 across the 17 of their papers we have counts for
17 papers
A Spectroscopic Hunt for Post-Red Supergiants in the Large Magellanic Cloud II: Turbulent Line Broadening in the Spectra of LMC Yellow Supergiants
Trevor Z. Dorn-Wallenstein, Kaitlyn M. Chen, Samantha C. Wu +4
Massive stars in the Hertzsprung gap are a mixed population of objects in short-lived evolutionary phases: yellow supergiants (YSGs) evolving towards the red supergiant (RSG) phase…
Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping
James R. A. Davenport, Francisca Chabour Barra, K. Azalee Bostroem +14
Here we present an automated method for obtaining wavelength calibrations for one-dimensional spectra, using Dynamic Time Warping (DTW). DTW is a flexible and well-understood algor…
Kalkayotl 2.0 Bayesian phase-space modelling of star-forming regions, stellar associations, and open clusters
J. Olivares, H. Bouy, Trevor Z. Dorn-Wallenstein +1
Context: Star-forming regions, stellar associations, and open clusters are fundamental stellar systems where predictions from star-formation theories can be robustly contrasted wit…
A Spectroscopic Hunt for Post-Red Supergiants in the Large Magellanic Cloud I: Preliminary Results
Kaitlyn M. Chen, Trevor Z. Dorn-Wallenstein
Yellow supergiants (YSGs) are rare and poorly understood, and studying them is critical to constraining massive star evolution. We obtained flux-calibrated Magellan Inamori Kyocera…
Physical Properties of 5,000 Cool LMC Supergiants with Gaia XP Spectra: A Detailed Portrait of the Upper HR Diagram Hints at Missing Supernova Progenitors
Trevor Z. Dorn-Wallenstein, Kathryn F. Neugent, Emily M. Levesque
Characterizing the physical properties of cool supergiants allows us to probe the final stages of a massive star's evolution before it undergoes core collapse. Despite their import…
Photometric detection of internal gravity waves in upper main-sequence stars. III. Comparison of amplitude spectrum fitting and Gaussian process regression using celerite2
Dominic M. Bowman, Trevor Z. Dorn-Wallenstein
Studies of massive stars using space photometry have revealed that they commonly exhibit stochastic low-frequency (SLF) variability. This has been interpreted as being caused by in…
The Properties of Fast Yellow Pulsating Supergiants: FYPS Point the Way to Missing Red Supergiants
Trevor Z. Dorn-Wallenstein, Emily M. Levesque, James R. A. Davenport +3
Fast yellow pulsating supergiants (FYPS) are a recently-discovered class of evolved massive pulsator. As candidate post-red supergiant objects, and one of the few classes of pulsat…
Testing Evolutionary Models with Red Supergiant and Wolf-Rayet Populations
Philip Massey, Kathryn F. Neugent, Trevor Z. Dorn-Wallenstein +3
Despite the many successes that modern massive star evolutionary theory has enjoyed, reproducing the apparent trend in the relative number of red supergiants (RSGs) and Wolf-Rayet…
Photometric Classifications of Evolved Massive Stars: Preparing for the Era of Webb and Roman with Machine Learning
Trevor Z. Dorn-Wallenstein, James R. A. Davenport, Daniela Huppenkothen +1
In the coming years, next-generation space-based infrared observatories will significantly increase our samples of rare massive stars, representing a tremendous opportunity to leve…
Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants
Trevor Z. Dorn-Wallenstein, Emily M. Levesque, Kathryn F. Neugent +3
Massive stars briefly pass through the yellow supergiant (YSG) phase as they evolve redward across the HR diagram and expand into red supergiants (RSGs). Higher-mass stars pass thr…
13 Years of P Cygni Spectropolarimetry: Investigating Mass-loss Through H, Periodicity, and Ellipticity
Keyan Gootkin, Trevor Dorn-Wallenstein, Jamie R. Lomax +7
We report on over 13 years of optical and near-ultraviolet spectropolarimetric observations of the famous Luminous Blue Variable (LBV), P Cygni. LBVs are a critical transitional ph…
A Comparison of Rotating and Binary Stellar Evolution Models: Effects on Massive Star Populations
Trevor Z. Dorn-Wallenstein, Emily M. Levesque
Both rotation and interactions with binary companions can significantly affect massive star evolution, altering interior and surface abundances, mass loss rates and mechanisms, obs…
Short Term Variability of Evolved Massive Stars with TESS
Trevor Z. Dorn-Wallenstein, Emily M. Levesque, James R. A. Davenport
We present the first results from a study of TESS Sector 1 and 2 light curves for eight evolved massive stars in the LMC: six yellow supergiants (YSGs) and two luminous blue variab…
Stellar Population Diagnostics of the Massive Star Binary Fraction
Trevor Z. Dorn-Wallenstein, Emily M. Levesque
Populations of massive stars are directly reflective of the physics of stellar evolution. Counting subtypes of massive stars and ratios of massive stars in different evolutionary s…
No Strong Geometric Beaming in the Ultraluminous Neutron Star Binary NGC 300 ULX-1 (SN 2010da) from Swift and Gemini
Breanna A. Binder, Emily M. Levesque, Trevor Dorn-Wallenstein
We have obtained near-simultaneous Swift/XRT imaging and Gemini GMOS spectroscopy for the ultraluminous X-ray source (ULX) NGC~300 ULX-1 (formerly designated SN~2010da). The observ…
A Mote in Andromeda's Disk: a Misidentified Periodic AGN Behind M31
Trevor Dorn-Wallenstein, Emily M. Levesque, John J. Ruan
We identify an object previously thought to be a star in the disk of M31, J0045+41, as a background AGN seen through a low-absorption region of M31. We present mode…
There Are (super)Giants in the Sky: Searching for Misidentified Massive Stars in Algorithmically-Selected Quasar Catalogs
Trevor Dorn-Wallenstein, Emily Levesque
Thanks to incredible advances in instrumentation, surveys like the Sloan Digital Sky Survey have been able to find and catalog billions of objects, ranging from local M dwarfs to d…