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metallicity

This tag is associated with 27 posts

Relevance of magnetic dissipation on star formation

Magnetic fields are a crucial part of star formation. Read on whether and how the magnetic field strength dissipates during the early collapsing phase.

Trending Exoplanets

Are more massive stars more likely to have planets? Read on to find out…

Away From it All: Dwarf Galaxies in Voids

Nature vs. nurture in the evolution of galaxies is not completely understood. Where a galaxy is found, its environment, can play an important role in determining the properties of that galaxy. This may not always be true, however.

More hypervelocity stars are jetting out of the galaxy

Palladino et al. find 13 new hypervelocity star candidates in the galaxy and find they probably do not originate from the center of the galaxy.

The (not so) Sordid History of the Small Magellanic Cloud

The authors of today’s paper find out just what kind of star formation history lies in the Milky Way’s next meal: The Small Magellanic Cloud. After all, they say you are what you eat.

Unveiling the friend of a pulsar

What kind of star is orbiting around a millisecond pulsar and where did it come from?

Tracking the Chemical Evolution of Galaxies Over the Last 11 Billion Years

In this article, the authors measure the stellar mass-metallicity relation for star forming galaxies ranging to z~2.3. They find that mass-metallicity relationship for these galaxies evolves with time and also that it flattens at late times.

Evidence for two distinct populations of Type Ia Supernovae

Type Ia Supernovae are extensively used in astronomy research, but the progenitors of these massive explosions are still not well understood. This paper discusses new evidence that there are two distinct populations of type Ia supernovae, and that they originate from different stellar populations.

Using a Lens to Look Back in Time

Using massive gravitational lenses can help us study the evolution of galaxies over unprecedented time scales.

The galaxy’s red giant bones

“Galactic archaeology” is the term that has come to refer to using the motions and chemical compositions of stars of different ages to learn about the history of the Milky Way. It seems to me that “galactic paleontology” might be a bit more accurate. I hope to see galactic archaeology v. galactic paleontology fought out in the comments!

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