Type Ia supernovae (SNe Ia) are important distance indicators, element factories, cosmic-ray
accelerators, kinetic-energy sources in galaxy evolution, and end points of stellar binary …

The identity of the progenitor systems of type-Ia supernovae (SNe Ia) is a major unsolved
problem in astrophysics. SN Ia rates are providing some striking clues. We review the basics …

Gamma-ray bursts (GRBs) come in two classes: long (> 2 s), soft-spectrum bursts and short,
hard events. Most progress has been made on understanding the long GRBs, which are …

The mathematical simplicity of black holes, combined with their links to some of the most
energetic events in the universe, means that black holes are key objects for fundamental …

Today's sensitive X-ray observations allow the study of populations of X-ray binaries in
galaxies as distant as 20–30 Mpc. Photometric diagrams and luminosity functions applied to …

We have derived bias-corrected X-ray luminosity functions (XLFs) of sources detected in a
uniformly selected sample of 14 E and S0 galaxies observed with Chandra ACIS-S3. The …

Over the past decade, observations of relativistic outflows from outbursting X-ray binaries in
the Galactic field have grown significantly. In this work, we present the first detection of …

A large fraction of X-ray sources in our Galaxy are low-mass X-ray binaries, containing a
black hole or a neutron star accreting from a gravitationally bound low-mass (≲ 1 M⊙) …

Globular clusters host a variety of lower-luminosity (LX< 10 35 erg s− 1) X-ray sources,
including accreting neutron stars (NSs) and black holes (BHs), millisecond pulsars (MSPs) …

We present results from a mosaic of nine Chandra observations of M86 and the surrounding
field. We detect three main diffuse components: the Virgo intracluster medium (ICM), the …