New simulations of stars roaming the disk of an active galactic nucleus suggest that stars with masses around 100 times the mass of the Sun accrete at a lower rate than previously thought.
New modeling of the F10.7 index — a measure of the Sun’s flux at a wavelength of 10.7 centimeters, which is correlated with its extreme-ultraviolet flux — outperforms existing models, aiding in space weather forecasting.
Researchers report the first measurement of the deuterium-to-hydrogen ratio in a substellar object outside the solar system; this measurement suggests a mass of less than 12 Jupiter masses for the object.
Using two decades of data from a variety of instruments, researchers examined the behavior of an X-ray binary system, finding a clear 244-day period as well as outbursts during certain orbital phases.
Two star clusters near the Orion star-forming complex have ages around 8.9 million years and appear to have formed via the coalescence of multiple subclusters from the same molecular cloud.
Simulations show that the gravity science experiment of the Venus Emissivity, Radio Science, InSAR, Topography and Spectroscopy (VERITAS) mission will be capable of achieving the mission’s stated science goals.