Spirou often runs into fantastic adventures with his courageous, and sharp pet squirrel Spip. Their next adventure: a radial velocity spectrograph. What sophisticated technology is this? How does it work? What can it help us find?
On using photometric data from Kepler to study starspots, and to measure differential rotation rates.
Our current best radial velocities are precise to about 1m/s. How do we make the step towards achieving 10cm/s precision?
Much of what we know today about exoplanets is due to the success of the radial velocity method. Where does it stand now? What is its future?
While the Sun is an excellent starting point in a quest to understand magnetism, the authors of today’s paper want more. They take advantage of something only relatively cool stars can have in their atmospheres to study magnetic fields: molecules in starspots.
Stars: steady-burning nuclear flames that pierce the darkness of space. Except when they’re not. The star known as HD 181068 is bright, but it’s no standard candle. On closer inspection, this well-studied system is actually home to three stars locked in a complex cosmic dance.