Can a planet change the measured age of its parent star?
If you know a star’s rotation, you can find its age. Today’s authors look at stars for which this isn’t the case.
If you know a star’s rotation, you can find its age. Today’s authors look at stars for which this isn’t the case.
Nothing is easy when you have two stars instead of one. Under the right circumstances, it can be especially hard to hold on to your atmosphere.
When the stars align, you just might catch a planet, a black hole, or a binary star—but it’s hard to measure its mass! What does it take to do so?
Scientists propose way in which we could observe the envelope being ejected from binaries going through a common envelope phase. And their predictions match a class of objects which have already been observed.
What happens to a low-mass companion when a star evolves off the main sequence to become a white dwarf?
Globular clusters are some of the most massive and densest star clusters observed. What are the progenitors of old globular clusters that we see orbiting the Milky Way and other galaxies? What evolutionary and dynamical effects have these clusters experienced? What determines the physical properties of old globular clusters? Why are there two “distinct” classes of globular clusters and what properties determine these physical states? These are the questions the authors aim to answer.