Did stripped stars re-ionize the Universe?
We still lack a good understanding of the source of ionizing photons in the early Universe. Can envelope-stripping from a binary companion help stars to re-ionize the early universe?
HD 59686Ab: How Did It Get There?
The circumprimary planet HD 59686 raises many questions about formation and stability in binary systems.
One Magnified Starburst Galaxy
Astronomers study a gravitationally lensed emission line galaxy, with implications for the characteristics of early galaxy populations.
Imaged Companion Drives Spiral Arms in Disk
Using 14 years of high resolution near-infrared imaging, radio observations of molecular gas, and a hydrodynamic simulation the authors show that spiral arms seen in the protoplanetary disk around HD 100453 A are caused by its M-dwarf companion.
A (Non?)-Magnetic White Dwarf Binary
A white dwarf binary system that sometimes shows evidence of a magnetic field — but only some of the time.
How many stars have companions?
The fraction of binary stars has implications in many fields of astronomy. Yet, we still don’t know this number, and even less how it varies with properties such as metallicity. Today’s paper sheds some light on this open question.
Image credits: Palomar Observatory/STScI/WikiSky