Crater II is the fourth largest galaxy among the satellites of the Milky Way, only surpassed by the Magellanic Clouds, Sagittarius and the recently discovered Antlia II galaxy. This galaxy lies in the frontier between classical satellites and ultra-faint dwarf galaxies. We explore the stellar population of Crater II through both its variable star

Starting with its earliest Data Releases, the Sloan Digital Sky Survey (SDSS) has a long history of producing visually inspected quasar catalogs. Here, we report on the quasar catalog from the sixteenth SDSS Data Release, DR16Q. The catalog comprises more than 750,000 unique quasars, of which 225,000 are new (as compared to the fourteenth data

Our Galaxy is known to contain a central boxy/peanut-shaped bulge, yet the importance of a classical, pressure-supported component within the central part of the Milky Way is still being debated. It should be most visible at low metallicity, a regime that has not yet been studied in detail. Using metallicity-sensitive narrow-band photometry, the

We present an extensive study of the Sagittarius II (Sgr II) stellar system using MegaCam g and i photometry, narrow-band, metallicity-sensitive calcium H&K doublet photometry and Keck II/DEIMOS multiobject spectroscopy. We derive and refine the Sgr II structural and stellar properties inferred at the time of its discovery. The colour-magnitude

EL CVn is the prototype of a class of eclipsing binaries that consist of an A- or F-type main-sequence star and a hot, low-mass, pre-He white dwarf (pre-He WD), the stripped down remains of the former mass donor. Here we present the first direct detection and characterization of the spectrum of the pre-He WD in EL CVn that was made possible through

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 period P orb = 4.23 days). However only an upper limit was placed on the planet mass (<1.3 M Jup), and a highly uncertain planetary radius (0.7-1.7 R Jup) was determined. Aims: We aim to