Massive stars have strong stellar winds that direct their evolution through the upper
Hertzsprung–Russell diagram and determine the black hole mass function. Furthermore …

All ten LIGO/Virgo binary black hole (BH-BH) coalescences reported following the O1/O2
runs have near-zero effective spins. There are only three potential explanations for this. If the …

Context. The star cluster R136 inside the Large Magellanic Cloud hosts a rich population of
massive stars, including the most massive stars known. The strong stellar winds of these …

All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is
accreting onto the black hole from a companion star. These systems are all binaries with a …

We describe the discovery of a solar neighborhood (d= 468 pc) binary system with a main-
sequence sunlike star and a massive noninteracting black hole candidate. The spectral …

Dusty star-forming galaxies at high redshift (1< z< 3) represent the most intense star-forming
regions in the universe. Key aspects to these processes are the gas heating and cooling …

We present an optical analysis of 55 members of R136, the central cluster in the Tarantula
Nebula of the Large Magellanic Cloud. Our sample was observed with STIS aboard the …

Binary black holes (BBHs) are thought to form in different environments, including the
galactic field and (globular, nuclear, young, and open) star clusters. Here, we propose a …

We model the strong lensing effect in the galaxy cluster PSZ1 G311. 65-18.48 (z= 0.443)
with an improved version of the hybrid method WSLAP+. We extend the number of …

As some of the only Lyman continuum (LyC) emitters at z∼ 0, Green Pea (GP) galaxies are
possible analogs of the sources that reionized the universe. We present HST COS spectra of …