Context. The transiting exoplanetary system WASP-174 was reported to be composed by a main-sequence F star (V = 11.8 mag) and a giant planet, WASP-174b (orbital...
The host galaxies of BL Lac objects in the near-infrared
We present the results of near-infrared H band (1.65 μm) imaging of 11 BL Lac objects with redshifts ranging from z = 0.05 to 0.9. We are able to clearly detect...
The host in blue compact galaxies.. Structural properties and scaling relations
Aims: We characterise the underlying stellar host in a sample of 20 blue compact galaxies (BCGs), by fitting their two-dimensional light distributions. Their...
The hot dayside and asymmetric transit of WASP-189 b seen by CHEOPS
The CHEOPS space mission dedicated to exoplanet follow-up was launched in December 2019, equipped with the capacity to perform photometric measurements at the...
The hottest horizontal-branch stars in ω Centauri. Late hot flasher vs. helium enrichment
Context: UV observations of some massive globular clusters have revealed a significant population of very hot stars below the hot end of the horizontal branch...
The HST/ACS star formation history of the Tucana dwarf spheroidal galaxy: clues from the horizontal branch
We report a new star formation history for the Tucana dwarf spheroidal galaxy, obtained from a new look at a deep HST/ACS colour-magnitude diagram. We combined...
Aims: Over its lifetime and despite not being a survey telescope, the Hubble Space Telescope (HST) has obtained multi-epoch observations by multiple, diverse...
The hydrodynamics and ionization structure of gaseous nebulae. I. The time-dependent solution
We present a one-dimensional numerical scheme that allows for the simultaneous solution of the hydrodynamic equations coupled with energy and ionization...