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White Dwarfs as Probes of the Evolution of Planets, Stars, the Milky Way and the Expanding Universe
This program is motivated by the recent observational insights concerning white dwarfs as individuals and as a population, based on the astrometry from Gaia and large photometric (e.g. Kepler,TESS, ZTF) and spectroscopic...
White Dwarfs from Physics to Astrophysics
Astrometric, photometric and spectroscopic all-sky surveys provide the first complete, unbiased view of the Galactic population of the most abundant type of stellar remnants: white dwarfs.
Fundamentals of Gaseous Halos
Gas in the halos of galaxies dominates the universe's baryon budget, traces its dark-matter potential wells, and supplies the fuel for star formation. Circumgalactic gas has also long been suspected to regulate galaxy...
Multiwavelength Probes of Galactic Atmospheres
The circumgalactic medium (CGM) can be viewed as an atmosphere that surrounds a galaxy and sustains star formation within it. Much of what we know about the CGM has come from absorption-line spectroscopy, mainly in the...