Stellar content, planetary nebulae, and globular clusters of [KKS2000]04 (NGC 1052-DF2)
[KKS2000]04 (NGC 1052-DF2) has become a controversial and well-studied galaxy after the claims suggesting a lack of dark matter and the presence of an...
Stellar dynamics and dark matter in Local Group dwarf galaxies
When interpreted within the standard framework of Newtonian gravity and dynamics, the kinematics of stars and gas in dwarf galaxies reveals that most of these...
Aims: We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein. Methods...
Stellar mergers as the origin of the blue main-sequence band in young star clusters
Recent high-quality Hubble Space Telescope photometry shows that the main-sequence stars of young star clusters form two discrete components in the colour...
Stellar metallicity gradients of Local Group dwarf galaxies
Aims: We explore correlations between the strength of metallicity gradients in Local Group dwarf galaxies and their stellar mass, star formation history...
We study the presence and importance of stellar migration in the evolution of 17 Milky-Way like disc galaxies with stellar mass 10 < log(M */M ⊙) < 11 from the...
Stellar Wind Variations during the X-Ray High and Low States of Cygnus X-1
We present results from Hubble Space Telescope ultraviolet spectroscopy of the massive X-ray and black hole binary system, HD 226868 = Cyg X-1. The spectra were...
StraKLIP: A Novel Pipeline for Detection and Characterization of Close-in Faint Companions through the Karhunen-Loéve Image Processing Algorithm
We present a new pipeline developed to detect and characterize faint astronomical companions at small angular separation from the host star using sets of wide...