When galactic bars form rapidly, the galaxy’s dark matter halo spin appears to have little impact, but when the process takes longer, halo spin can hasten or delay bar formation, depending on the direction of the halo’s spin.
Long-term observations and modeling of a transient likely associated with a a star–planet merger suggest that the star was on the brink of joining the main sequence and the planet was at least several times as massive as Jupiter.
Researchers have applied a new Python-based spectral fitting tool to JWST spectra of the young protostar NGC 1333 IRAS 2A, identifying previously noted and new ice species and complex organic molecules.
If Uranus’s oscillations are comparable to Saturn’s, a low-flying orbiter could detect modes with low angular degree after only a few close passes, while higher-degree modes would require at least eight passes.
A deep search for high-redshift galaxies in some of the richest JWST imaging to date emphasizes the importance of medium-band filters in excluding low-redshift interlopers and maximizing completeness.
In simulations featuring an inner disk tilted by 30 degrees, the outer disk develops a thermally driven warp due to launching of bending waves, which drives a tilting response in the outer disk.