Micalyn Rowe
A5053581831- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
Texas A&M University
2022-2023
Mitchell Institute
2022
Abstract We present five far- and near-ultraviolet spectra of the Type II plateau supernova, SN 2022acko, obtained 5, 6, 7, 19, 21 days after explosion, all observed with Hubble Space Telescope/Space Telescope Imaging Spectrograph. The first three epochs are earlier than any supernova has been in far-ultraviolet revealing unprecedented characteristics. These dominated by strong lines, primarily from metals, which contrasts featureless early optical spectra. flux decreases over initial time...
We present three epochs of early-time ultraviolet (UV) and optical HST/STIS spectroscopy the young, nearby Type IIP supernova (SN) 2021yja. complement HST data with two earlier Swift UVOT spectroscopy. The spectra are consistent those other well-studied supernovae (SNe). UV exhibit rapid cooling at early times, while less dramatic changes seen in optical. also Lick/KAIT photometry up to late-time-tail phase, showing a very long plateau shallow decline compared SNe IIP. Our modeling spectrum...
We present five far- and near-ultraviolet spectra of the Type II plateau supernova, SN 2022acko, obtained 5, 6, 7, 19, 21 days after explosion, all observed with Hubble Space Telescope/Space Telescope Imaging Spectrograph. The first three epochs are earlier than any supernova has been in far-ultraviolet revealing unprecedented characteristics. These dominated by strong lines, primarily from metals, which contrasts relatively featureless early optical spectra. flux decreases over initial time...