Paper 13093-17
Paper 13093-17
The UVIa 12U CubeSat concept: mission overview
16 June 2024 • 15:40 - 16:00 Japan Standard Time | Room G414/415, North - 4F
Abstract
Type Ia supernovae (SNe Ia) are a cornerstone of modern cosmology. Upcoming missions like the Nancy Grace Roman Telescope are pushing to high redshifts to measure cosmological parameters like the dark energy equation of state. Despite the impressive success of empirically standardizing their luminosities, the explosion mechanism of SNe Ia remains hotly debated; e.g., the mass of the white dwarf (WD) when it explodes and the state of the companion star (degenerate or non-degenerate) are all currently in question.
Early-time UV observations are sensitive to the outermost layers of the ejecta (and least affected by the explosion itself) and show the most diversity for SNe Ia. This makes the UV bandpass an excellent probe to solve these open questions about the nature of these cosmological distance indicators. To achieve this science, we present UVIa, a CubeSat that will be reactive and have simultaneous optical, Near-UV (NUV), and Far-UV (FUV) coverage, takes advantage of state-of-the-art UV coatings, UV-enhanced silicon detectors with whitelight rejection filter, and autonomous observing scheduling, updated regularly based on newly discovered SNe Ia from modern transient surveys.
Early-time UV observations are sensitive to the outermost layers of the ejecta (and least affected by the explosion itself) and show the most diversity for SNe Ia. This makes the UV bandpass an excellent probe to solve these open questions about the nature of these cosmological distance indicators. To achieve this science, we present UVIa, a CubeSat that will be reactive and have simultaneous optical, Near-UV (NUV), and Far-UV (FUV) coverage, takes advantage of state-of-the-art UV coatings, UV-enhanced silicon detectors with whitelight rejection filter, and autonomous observing scheduling, updated regularly based on newly discovered SNe Ia from modern transient surveys.
Presenter
Keri Hoadley
The Univ. of Iowa (United States)
Dr. Keri Hoadley is an Assistant Professor at the University of Iowa and a NASA Roman Technology Fellow. She is an expert in ultraviolet astronomy and instrumentation, having lead NASA suborbital missions like the Colorado High-resolution Echelle Stellar Spectrograph (CHESS) sounding rocket payload and the Faint Intergalactic Redshifted Emission Balloon (FIREBall-2) telescope. She is the Deputy PI for the SNOUT mission and PI of a NASA technology development effort to fabricate highly efficient reflection gratings for ultraviolet astrophysics applications and the CubeSat mission concept UVIA.