We are undertaking an ambitious proper motion survey of massive stars in the 30 Doradus region of the Large Magellanic Cloud using the unique capabilities of...

Indirect evidence from detailed chemical evolution studies shows that infall of low metallicity gas appears to have proceeded at a rather constant rate during...

In the planning stage of extremely large telescopes, site testing and study of high performance adaptive optics systems plays very important roles. Site testing...

We present hydrodynamical simulations of multiple shell planetary nebulae (MSPN) formation using evolutionary models of 1, 1.5, 2, 2.5, 3.5 and 5 M_odot...

New spectra of A78 and A58 at different positions in the nebulae are presented. An abundance gradient is found in A78, extending quite close to the center...

One of the most outstanding astrochemistry problems, since the advent of the IRAS satellite, is the identification of the chemical carriers (structure and...

Not Available

Introduction The cosine* HyperScout-H (HS-H) instrument will fly aboard the ESA/Hera spacecraft. This mission [1], focused on planetary defense, aims to...

We identify candidate hypervelocity stars from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) G and K dwarf samples. Previous searches...