Red supergiant candidates for multimessenger monitoring of the next Galactic supernova
Monthly Notices of the Royal Astronomical Society Oxford University Press 529:4 (2024) 3630-3650
Abstract:
We compile a catalogue of 578 highly probable and 62 likely red supergiants (RSGs) of the Milky Way, which represents the largest list of Galactic RSG candidates designed for continuous follow-up efforts to date. We match distances measured by Gaia DR3, 2MASS photometry, and a 3D Galactic dust map to obtain luminous bright late-type stars. Determining the stars' bolometric luminosities and effective temperatures, we compare to Geneva stellar evolution tracks to determine likely RSG candidates, and quantify contamination using a catalogue of Galactic AGB in the same luminosity-temperature space. We add details for common or interesting characteristics of RSG, such as multistar system membership, variability, and classification as a runaway. As potential future core-collapse supernova progenitors, we study the ability of the catalogue to inform the Supernova Early Warning System (SNEWS) coincidence network made to automate pointing, and show that for 3D position estimates made possible by neutrinos, the number of progenitor candidates can be significantly reduced, improving our ability to observe the progenitor pre-explosion and the early phases of core-collapse supernovae.Evidence of antineutrinos from distant reactors using pure water at SNO
Physical Review Letters American Physical Society 130:9 (2023) 91801
Abstract:
The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. The nearest nuclear reactors are located 240 km away in Ontario, Canada. This analysis uses events with energies lower than in any previous analysis with a large water Cherenkov detector. Two analytical methods are used to distinguish reactor antineutrinos from background events in 190 days of data and yield consistent evidence for antineutrinos with a combined significance of 3.5σ.Collaborative experience between scientific software projects using Agile Scrum development
Software Practice and Experience Wiley 52:10 (2022) 2077-2096
Improved search for invisible modes of nucleon decay in water with the SNO+detector
Physical Review D American Physical Society (APS) 105:11 (2022) 112012
Neutrino echos following black hole formation in core-collapse supernovae
The Astrophysical Journal IOP Publishing 926:2 (2022) 212