Astrophysics

I will present the cosmological weak lensing results from the Dark Energy Survey (DES) using its first three years of data, taken on the 4m Blanco telescope at CTIO. This analysis spans the full DES footprint, more than 4000 sq. deg. of sky, with...

Over last six years, the LIGO-Virgo detections of gravitational waves from compact binary mergers have underlined their promise as an independent and powerful tool to explore the Universe. Nevertheless, the electromagnetic observations of the...

Abstract 1: The time delay measured between the images of gravitationally lensed quasars probes a combination of angular diameter distances and the mass profile of the lens. Observational campaigns to measure such systems have reported a...

We present a catalog of stellar companions to host stars of TESS Objects of Interest identified from a marginalized likelihood ratio test that incorporates astrometric data from the Gaia Early Data Release 3 catalog (EDR3). The likelihood ratio is...

Each week, we hold a relatively informal seminar/discussion series with an emphasis on extra-galactic and large-scale structure astrophysics.

During Galread a leader/visitor presents a recent paper to the discussion group. The PDF of the paper is...

The magnetorotational instability (MRI) is a fundamental process occurring in astrophysical accretion disks. The MRI promotes accretion by driving turbulence on macroscopic scales. In the process, magnetic reconnection and other collective plasma...

Thermally-pulsing Asymptotic Giant Branch (TP-AGB) stars dominate the IR flux in star-forming galaxies (up to 70%). This dominance has a significant impact on model-dependent derived galaxy properties like the star-formation rate and stellar mass...

Spectral Energy Distribution (SED) modeling is essential for galaxy evolution and cosmology to derive physical properties of galaxies, such as their stellar mass, star formation history, and chemical enrichment history, from observations. State-of...

The orbital evolution of binary systems perturbed by external tidal forces represents one of the oldest problems in celestial mechanics.   Interest in this class of problems has resurged recently due to the discovery of various exotic astrophysical...