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Author

A. M'erand

3 papers indexed here

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Open access Sep 2026

Interstellar extinction of classical Cepheids from neighboring stars. I. Methodology and application to 16 Galactic Cepheids

Galactic Cepheid variable stars are fundamental calibrators of the cosmic distance scale through their period-luminosity (PL) relation. The high-precision parallaxes expected from Gaia Data Release 4 (DR4) will enable a calibration of the Milky Way PL relation with unprecedented precision. This will place stringent req...

W. Kiviaho, P. Kervella, M. Juvela et al. · 0 citations
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. · 1 citation
Aug 2026

PLANETES: a technology demonstrator for dual-field interferometry in the J-Band at the VLTI

We present PLANETES, a technology development project that aims at demonstrating GRAVITY-style dualfield interferometry into the J band. Building on PIONIER’s legacy in short-wavelength interferometry and GRAVITY’s breakthroughs in dual-field operation, this demonstrator integrates dual-field injection, integratedoptic...

M. Nowak, Sylvestre Lacour, R. Abuter et al. · 0 citations

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