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galaxy evolution

This tag is associated with 73 posts

Bulgeless galaxies with growing black holes

Mergers make bulges in galaxies and black holes generally live in bulges, so mergers must grow black holes – simple. That was until we found bulgeless galaxies containing growing black holes…

Two roads through the green valley

Large surveys of galaxies have revealed a bimodal color distribution: most galaxies tend to be red or blue, leaving a gap in the middle known as the green valley. The authors of this paper use morphologies provided by the Galaxy Zoo project to show that not all galaxies take the same quick path through the green valley.

Compact Galaxies in the Nearby Universe

Small and massive compact galaxies are some of the hardest galaxies to find, but they could potentially reveal how galaxies evolved in the early universe.

Young Stars in the Galactic Bulge- An Outcome of Internal Evolution

The recent discovery of young stars in the Milky Way’s galactic bulge have raised new questions about galaxy formation. In this paper, a new simulation shows that such stars could be an outcome of natural evolution in the disc over time.

Galaxy in a Bottle: Simulating Spiral Galaxy Formation

How do simulations of galaxy formation stack up against each other and against observations? Find out with the Aquila project, a comparo of many different codes in current use.

The Changing Faces of Active Galactic Nuclei

Has a multi-wavelength study of AGN across a large redshift range revealed that these energetic giants do not impact upon their host galaxy as significantly as previously thought?

Finding Relics of Galaxy Formation

Could the strange-looking irregular galaxies actually be remnants of the birth of galaxies? This paper demonstrates a method to find such galaxies.

Bars as Drivers of Galactic Evolution

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.

Unsolved Problems: Magnetic Field Evolution in 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 Most Distant Confirmed Galaxy

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.

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