FLASH Talks: Aaron Meisner (NOIRLab) & Izumi Endo (University of Tokyo)
Friday, 21 October 2022 1 p.m. — 2 p.m. MST
NOIRLab Headquarters | 950 North Cherry Ave., Tucson, AZ 85719
Aaron Meisner, NOIRLab
unTimely: an infrared, time-domain, full-sky catalog
I will present a deep, time-domain catalog based on all-sky 3-5 micron WISE/NEOWISE observations and “unWISE” coadds. This new catalog, referred to as “unTimely”, pushes > 3x deeper than individual WISE exposures and includes ~45 billion detections. unTimely is publicly available and will enable a variety of science related to faint moving/variable objects, including: searches for planetary mass brown dwarfs, exoasteroid disruptions around white dwarfs, and all-sky studies of quasar variability at infrared wavelengths over a decade-long time baseline.
Izumi Endo, University of Tokyo
Experimental and observational approaches to investigate the properties of organics around evolved stars
Interstellar organics, as the carriers of the Unidentified Infrared (UIR) bands observed in various astrophysical environments, are prevalent throughout the universe. However, their detailed chemical composition and formation/evolution process are still unclear. Since interstellar organics cannot be easily caught in hand, these questions have to be tackled with combined approaches between observational and experimental studies. In this talk, we will report the results of an experimental study of Quenched Nitrogen-included Carbonaceous Composite (QNCC), which is at present the best laboratory analog of organics formed in dusty classical novae. In addition, we will also present the results of mid-infrared observations of a dusty Wolf-Rayet (WR) star, which is potentially a significant source of organics in the early universe.