General relativity has been widely tested in weak gravitational fields but still stands largely
untested in the strong-field regime. According to the no-hair theorem, black holes in general …

The GRAVITY Collaboration achieved a remarkable detection of the orbital precession of the
S2 star around the Galactic Center supermassive black hole, providing yet another proof of …

In the cold dark matter cosmology, the baryonic components of galaxies—stars and gas—
are thought to be mixed with and embedded in non-baryonic and non-relativistic dark matter …

We combine optical, near-infrared, and mid-infrared spectra and photometry to construct
expanded spectral energy distributions for 145 field age (> 500 Myr) and 53 young (lower …

Isotope abundance ratios have an important role in astronomy and planetary sciences,
providing insights into the origin and evolution of the Solar System, interstellar chemistry and …

We present the results of 16 years of monitoring stellar orbits around the massive black hole
in the center of the Milky Way, using high-resolution near-infrared techniques. This work …

We present the" SINS/zC-SINF AO survey" of 35 star-forming galaxies, the largest sample
with deep adaptive optics (AO)–assisted near-infrared integral field spectroscopy at z∼ 2 …

Faint Lyα emitters become increasingly rarer toward the reionization epoch (z∼ 6–7).
However, observations from a very large (∼ 5 deg 2) Lyα narrow-band survey at z= 6.6 …

The highly elliptical, 16-year-period orbit of the star S2 around the massive black hole
candidate Sgr A✻ is a sensitive probe of the gravitational field in the Galactic centre. Near …

We have studied the properties of giant star-forming clumps in five z∼ 2 star-forming disks
with deep SINFONI AO spectroscopy at the ESO VLT. The clumps reside in disk regions …