The authors present the discovery of a new hot carbon-atmosphere white dwarf with a strong magnetic field. This discovery might help illuminate the origins of a recently found class of white dwarfs.
In the sun, subsurface flows are 20-100 times slower than what is predicted in widely used theoretical models.
Title: SDSS J184037.78+642312.3: The First Pulsating Extremely Low Mass White Dwarf Authors: J. J. Hermes, M. H. Montgomery, D. E. Winget, Warren R. Brown, Mukremin Kilic, Scott J. Kenyon First Author’s Institution: UT Austin, TX 97% of all stars — those with initial masses less than about 8 solar masses — end their lives as […]
Just as seismologists determine the structure of the Earth through surface vibrations, so asteroseismologists do the same for stars
In this paper, techniques from helioseismology – using waves to learn about the interior of the Sun – are applied to yet another object: Jupiter. Because Jupiter is largely a fluid, like the Sun, astronomers have expected it to show global seismic behavior since the mid-1970s; the signal was even theorized to be about the same magnitude as solar oscillations. However, attempts to detect Jupiter’s global oscillations in the 80s and 90s were largely unsuccessful.
Previously, it was impossible to find out the inner source behind a red giant’s light – hydrogen fusion in a shell, or helium fusion in the core? Using Kepler, the authors of this paper show how to do this observationally using asteroseismology.