Transient surveys are discovering increasingly complex supernovae; one such example transitioned from being Type IIb–like to resembling a stripped-envelope supernova during a dramatic second peak.
Tyrone N. O’Doherty et al 2024 AJ 168 44
New research suggests that astronomers should proceed carefully with identifying black holes via ellipsoidal variations; a closer look at a black hole candidate revealed a likely contact binary instead.
The existence of Martian “tadpole craters” with rims broken by outflowing liquid but no inflowing liquid may imply the past presence of hundreds of meters of surface ice, modeling suggests.
A survey has discovered 34 giant radio sources — active galactic nuclei with projected linear sizes larger than about 2.2 million light-years — and reported on their multi-wavelength properties.
Active galactic nucleus hosts that have outflows tend to have higher star formation rates, later morphological types, and no evidence of quenching of star formation, among other characteristics.
A proposed future version of the Event Horizon Telescope may be able to detect the polarization reversal indicative of the presence of a black hole photon ring at a signal-to-noise ratio of 2–3.