While gravitational microlensing by planetary systems can provide unique vistas on the properties of exoplanets, observations of such 2-body microlensing events can often be explained with multiple and distinct physical configurations, so-called …
The Ultraviolet Explorer (UVEX) will undertake a synoptic survey of the entire sky in near-UV (NUV) and far-UV (FUV) bands, probing the dynamic FUV and NUV universe, as well as perform a modern, all- sky imaging survey that reaches 50 times deeper …
Several thousand core-collapse supernovae (CCSNe) of different flavors have been discovered so far. However, identifying their progenitors has remained an outstanding open question in astrophysics. Studies of SN host galaxies have proven to be …
Whether supernovae are a significant source of dust has been a long- standing debate. The large quantities of dust observed in high- redshift galaxies raise a fundamental question as to the origin of dust in the Universe since stars cannot have …
We have obtained repeated images of six fields toward the Galactic bulge in five passbands (u, g, r, i, z) with the DECam imager on the Blanco 4 m telescope at CTIO. From more than 1.6 billion individual photometric measurements in the field centered …
We present year-long, near-infrared (NIR) Hubble Space Telescope (HST) WFC3 observations of Mira variables in the water megamaser host galaxy NGC 4258. Miras are asymptotic giant branch variables that can be divided into oxygen- (O-) and carbon- (C-) …
Merging neutron stars offer an excellent laboratory for simultaneously studying strong-field gravity and matter in extreme environments. We establish the physical association of an electromagnetic counterpart (EM170817) with gravitational waves …
We present the results of a Hubble Space Telescope WFC3/F160W Snapshot survey of the host galaxies of 39 long-duration gamma-ray bursts (LGRBs) at z < 3. We have non-detections of hosts at the locations of four bursts. Sufficient accuracy to …
We investigate the relationship between stellar and gas specific angular momentum j, stellar mass M$_*$ and optical morphology for a sample of 488 galaxies extracted from the Sydney-AAO Multi- object Integral field Galaxy Survey. We find that j, …