Author

J. Kolb

2 papers indexed here

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Open access Aug 2026

Discovery of a star sensitive to the spin of Sagittarius A*

Residing in the centre of the Milky Way, Sagittarius A* (Sgr A*) is the closest massive black hole1 (MBH). Its vicinity has allowed measuring individual stellar orbits around it2, 3–4. The stars act as test particles and probe the gravitational potential around the 4.3 × 106M⊙ MBH. These observations have determined th...

K. A. El Dayem, R. Abuter, N. Aimar et al. · Nature · 1 citation

Aug 2026

Diagnosing spatial-coherence outer scale, seeing, and dome-induced turbulence from simultaneous multi-wavelength imaging of point-like sources

Atmospheric turbulence causes refractive-index fluctuations that distort the wavefront of light from astronomi cal sources. As starlight propagates through multiple turbulent layers, the cumulative effect sets the achievable image quality (IQ) of observations obtained with ground-based telescopes. Global parameters suc...

B. García-Lorenzo, J. Castro-Almazán, D. Esparza-Arredondo et al. · Astronomical Telescopes + In... · 1 citation