The mass of a substellar companion can help determine whether it’s a planet or a brown dwarf. But how can you measure the mass of a companion that you can’t detect directly? Look at the disk!
There’s a lot going on in the HD 142527 protoplanetary disk — accretion, gap opening, and a horseshoe-shaped dust ring. The authors of this paper used ALMA to take a closer look at the gas and dust in this busy disk.
The disk around 49 Ceti is known to show characteristics of both protoplanetary and debris disks. New observations with Herschel reveal that it is likely a debris disk with gas generated by evaporating comets.
Spectroscopy with Herschel can probe the dust in the heart of protoplanetary disks through the 69 micron feature of forsterite. Examining these features in detail reveals that the dust grains are small, iron poor, and confined to narrow rings.
This paper looks at the role a young star’s environment plays in forming planets around it.
A team of astronomers and geologists have teamed up to study the composition of a rocky super-Earth which likely contains a layer of carbon in the form of diamond and graphite.
Paper Title: Disruption of a Proto-Planetary Disk by the Black Hole at the Milky Way Centre Authors: Murray-Clay, R. A. and Loeb, A. Institution: Harvard-Smithsonian Center for Astrophysics (CfA) If our solar system lives in suburbia, the center of our galaxy is a sprawling metropolis shining bright for all to see. The center of our […]
Amid all of the swirling chaos during star formation, the universe finds a way to order its diffuse gas into shining young stars. ALMA Science Verification observations give new insight.
The authors report on a young, Sun-like star with a debris disk of dust and larger rocks that has had the dust particles mysteriously vanish from the disk in a span of less than two years.
AU Mic is a low mass star that undergoes unpredictable brightening events, called flares. It’s located just 10pc and has a circumstellar disk. In this paper, Wilner et al. report on observations of the disk at millimeter wavelengths and find evidence for a planetesimal ring.