Could the strange-looking irregular galaxies actually be remnants of the birth of galaxies? This paper demonstrates a method to find such galaxies.
Galactic bars have long been associated with many processes affecting galactic evolution. This paper studies how bars affect the star formation rate, mass and structure of a large sample of morphologically classified galaxies.
Magnetic fields are ubiquitous in the Universe. Everything including stars, solar systems, galaxies, galaxy clusters, and even large scale voids have magnetic fields. We know magnetic fields exist in the Universe, but have had a challenging time uncovering both their origin and evolution. Today’s astrobite discusses a recent paper exploring how magnetic fields evolved in young galaxies through computational simulations. It is one step further in unlocking the history of magnetic fields in our Universe.
The authors of this work report the discovery of the most distant, spectroscopically-confirmed galaxy found to date, which presently lies about 30 billion light years from Earth. The galaxy is being observed as it was at a time just 700 million years after the Big Bang, which is a mere 5% of the universe’s current age of 13.8 billion years.
The densest galaxy in the local Universe may have been found. M60-UCD1 is most likely a tidally-stripped remnant of a more massive progenitor galaxy. Strader et al. predicts that the progenitor of M60-UCD1 was ~ 50-200 times more massive, suggesting that it was once an elliptical galaxy that has been stripped of most of its mass.
Galaxies have more than doubled in size since they first formed, but why?
A team of researchers present multiwavelength observations of a rare merger between two massive, gas-rich starburst galaxies at a redshift of 2.3. This kind of merger could help explain the presence of the most massive elliptical galaxies at high redshift.
Huang et al. dig up evidence that distant “red nugget” galaxies grew into the massive ellipticals we see today by consuming smaller, gas-poor galaxies.
Moving mesh code AREPO looks like it will help astronomers understand the physics of galaxy formation and evolution better than its predecessors, due to an innovative new method of solving the fluid dynamics equations in astrophysical settings. This paper discusses the differences between AREPO and another code called GADGET in the case of gas accretion onto galaxies.