activity
20002023
most citedDetection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole

947 citations · 6.1k across the 61 of their papers we have counts for

collaborators

61 papers

astro-ph.IM2023★ 21 cited

The GRAVITY+ Project: Towards All-sky, Faint-Science, High-Contrast Near-Infrared Interferometry at the VLTI

GRAVITY+ Collaboration, :, Roberto Abuter +134

The GRAVITY instrument has been revolutionary for near-infrared interferometry by pushing sensitivity and precision to previously unknown limits. With the upgrade of GRAVITY and th…

astro-ph.HE2023★ 19 cited

General relativistic effects and the near-infrared and X-ray variability of Sgr A* I

Sebastiano D. von Fellenberg, Gunther Witzel, Michi Bauböck +17

The near-infrared (NIR) and X-ray emission of Sagittarius A* shows occasional bright flares that are assumed to originate from the innermost region of the accretion flow. We identi…

gr-qc2022★ 60 cited

Observational signatures of hot spots orbiting horizonless objects

João Luís Rosa, Paulo Garcia, Frédéric H. Vincent +1

Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our univer…

astro-ph.HE2022★ 34 cited

Observational properties of puffy disks: radiative GRMHD spectra of mildly sub-Eddington accretion

Maciek Wielgus, Debora Lancova, Odele Straub +7

Numerical general relativistic radiative magnetohydrodynamic simulations of accretion disks around a stellar mass black hole with a luminosity above 0.5 of the Eddington value reve…

astro-ph.GA2021★ 48 cited

The dark mass signature in the orbit of S2

Gernot Heißel, Thibaut Paumard, Guy Perrin +1

Aims. We explore a strategy for how the Schwarzschild and mass precessions can be separated from each other despite their secular interference, by pinpointing their signatures with…

astro-ph.SR2021★ 4 cited

MOLsphere and pulsations of the Galactic Center's red supergiant GCIRS 7 from VLTI/GRAVITY

GRAVITY Collaboration, G. Rodríguez-Coira, T. Paumard +55

GCIRS 7, the brightest star in the Galactic central parsec, formed Myr ago together with dozens of massive stars in a disk orbiting the central black-hole. It has been argu…