10 citations · 38 across the 18 of their papers we have counts for
8 papers · 1 filter
Multi epoch spectroscopic variability of the B supergiant HD75149
J. Chamoun-Contreras, C. Arcos, N. Machuca +6
Massive stars continuously enrich the surrounding interstellar medium by supplying it with stellar material driven by their powerful winds. B supergiant stars (BSGs) in particular…
Application limit of the photocentre displacement to fundamental stellar parameters of fast rotators -- Illustration on the edge-on fast rotator Regulus
M. Hadjara, R. G. Petrov, S. Jankov +16
Differential Interferometry allows to obtain the differential visibility and phase, in addition to the spectrum. The differential phase contains important information about the str…
A CO-multilayer outer atmosphere for eight evolved stars revealed with VLTI/AMBER
M. Hadjara, P. Cruzalèbes, C. Nitschelm +3
We determine the physical parameters of the outer atmosphere of a sample of eight evolved stars, including the red supergiant α Scorpii, the red giant branch stars α Bootis and γ C…
Spatially resolving the atmosphere of the non-Mira-type AGB star SW Vir in near-infrared molecular and atomic lines with VLTI/AMBER
K. Ohnaka, M. Hadjara, M. Y. L. Maluenda Berna
We present a near-infrared spectro-interferometric observation of the non-Mira-type, semiregular asymptotic giant branch star SW Vir. Our aim is to probe the physical properties of…
Differential interferometry of the rapid rotator Regulus
M. Hadjara, R. G. Petrov, S. Jankov +3
We analyse interferometric data obtained for Regulus with AMBER (Astronomical Multi- BEam combineR) at high spectral resolution () across the Br spectral line…
Regulus observed with VLTI/AMBER
S. Jankov, M. Hadjara, R. G. Petrov +3
The rapidly rotating primary component of Regulus A system has been observed, for the first time, using the technique of differential interferometry at high spectral resolution. Th…
Observations et modélisations spectro-interférométriques longue base des étoiles et de leur environnement proche
M. Hadjara
With the construction of the VLTI (Very Large Telescope Interferometer of the European Observatory ESO for the southern hemisphere) it is now possible to make observations with res…
Etude et mise en oeuvre des techniques Temps-Distance en Heliosismologie
Massinissa Hadjara
In the same way that seismologists study the interior of the earth from the waves generated by earthquakes, heliosismology is the science that is interested in the study of oscilla…