astrobites
star formation
Enhanced star formation in interacting galaxies: how far does it reach?
Star formation is enhanced when two galaxies interact or merge. But what is the orbital extent of enhanced star formation in interacting galaxies? At which projected separation of the two galaxies does it disappear?
Blowing Bubbles from Our Galaxy
What causes the giant radio and gamma-ray bubbles inflated from our galactic center? This paper provides another good argument for star formation as the culprit.
Seeing Galaxy formation before reionization: baryon-dark matter relative velocity helps!
Relative velocity in the early Universe between regular matter (baryons) and dark matter enhances an otherwise hard-to-detect signal and makes it likely we can look back even farther into the past.
Evidence for a Universal IMF from a Dwarf Galaxy
Hubble observations of a nearby galaxy show evidence for a universal initial mass function.
Mapping star formation in galaxies using slitless spectroscopy
A team of astronomers working on the 3D-HST survey make use of the Hubble Space Telescope’s grism to observe star formation as a function of radius in a large sample of galaxies at intermediate redshift.
The effect of magnetic fields on star formation
Boss & Keiser examine how magnetic fields with varying initial conditions affect star formation.
Reconstructing the histories of our nearest galactic neighbors
TITLE: Comparing the Ancient Star Formation Histories of the Magellanic Clouds AUTHORS: Daniel R. Weisz, Andrew E. Dolphin, Evan D. Skillman, Jon Holtzman, Julianne J. Dalcanton, Andrew A. Cole, Kyle Neary AUTHORS’ INSTITUTION: University of Washington The evolution of galaxies can be investigated in two ways: we can observe galaxies at farther distances to get a picture of [...]
No jets in the Galactic center?
Carretti and collaborators have found new evidence that the gigantic bubbles of emission emanating from the center of our Milky Way are the result of winds from supernova explosions, not jets from our supermassive black hole.
First discovery of X-ray emission from young stars in the Small Magellanic Cloud
For the first time, diffuse X-ray emission from young stars is identified in the Small Magellanic Cloud (SMC), using data from Chandra.
The constant X-factor, why is it constant?
There is a long standing debate on whether the X-factor, the conversion factor between molecular hydrogen and carbon monoxide in molecular clouds, is constant in our Galaxy. This is a very important assumption we usually make when studying star formation! In this post, we explore state-of-the-art simulations by Narayanan & Hopkins that attempt to settle this debate.
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