Star Formation in Cosmic SMUDGes

Star Formation in Cosmic SMUDGes

What happens when you take a dwarf galaxy and stretch it out to the size of the Milky Way? And how do these strange galaxies shut down star formation? Today’s authors search for ultra-diffuse galaxies which have recently stopped forming stars to find an answer.

Zapping PAHs? Yee-haw!

Zapping PAHs? Yee-haw!

Polycyclic aromatic hydrocarbons (PAHs) are small molecules consisting of rings of carbons, ubiquitous in the interstellar medium. However, PAHs do not seem to be present in protoplanetary disks around the youngest stars. Today’s paper tries to understand why that is.