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Spectroscopic study of Of^+^ supergiants
The transition from early Of stars to WN-type objects is poorly understood. O-type supergiants with emission lines (OIf^+^) are considered to be intermediate between these two... -
BVRJHK photometry of M31 red supergiants
We have surveyed M31 for its most luminous red stars; 300 candidates were found distributed across the face of the galaxy. JHK infrared photometry was observed for 57 of the... -
Evolved Massive Stars at Low Metallicity. VI. Mass loss
Mass loss is a crucial process that affects the observational properties, evolution path, and fate of highly evolved stars. However, the mechanism of mass loss is still unclear,... -
OB and Supergiants stars in LMC
Two regions in the Large Magellanic Cloud, centered at 05:11-66:08 (34B) and 05:27-72:15 (47B) have been searched for OB and supergiant stars. A catalogue of 312 stars is... -
Reddenings of FGK supergiants & Cepheids
Accurate and homogeneous atmospheric parameters (Teff, logg, Vt, [Fe/H]) are derived for 74 FGK non-variable supergiants from high-resolution, high signal-to-noise ratio,... -
CRIRES NIR-DIBs
A high spectral resolution investigation of diffuse interstellar bands (DIBs) in the near-infrared (YJ band) is conducted to test new methods, to confirm and improve existing... -
VLTI/PIONIER observations of CE Tauri
Red supergiant stars represent one of the latest stages of the evolution of massive stars. Their photospheric convection may play an important role in the launching mechanism of... -
DIRECT lightcurves of 21 luminous YSGs in M33
The evolution of massive stars surviving the red supergiant (RSG) stage remains unexplored due to the rarity of such objects. The yellow hypergiants (YHGs) appear to be the warm... -
VLT-FLAMES Tarantula Survey: B supergiants
Model atmosphere analyses have been previously undertaken for both Galactic and extragalactic B-type supergiants. By contrast, little attention has been given to a comparison of... -
Aperture-synthesis imaging of Antares
We present aperture-synthesis imaging of the red supergiant Antares (alpha Sco) in the CO first overtone lines. Our goal is to probe the structure and dynamics of the outer... -
Modelling of Magellanic Cloud C/O stars
Mass loss is one of the fundamental properties of Asymptotic Giant Branch (AGB) stars, and through the enrichment of the interstellar medium, AGB stars are key players in the... -
V810 Cen Geneva photometry
The light curve of the yellow supergiant V810 Centauri in the Geneva photometric system has been analysed with Date Compensate Fourier Transform and Weighted Wavelet... -
Chemical composition of six K supergiants in the SMC
A sample of six SMC cool stars (K supergiants) are analysed by high resolution spectroscopy in order to investigate their chemical content, which should reflect that of the... -
uvby-Hbeta photometry of Eta Car 1992-94
We present and analyze two seasons of intense photometric monitoring in the Stroemgren uvbyH{beta} system of {eta} Carinae (October 1992-August 1994). The luminous blue variable... -
Radio emission from stars at 250GHz
We have used the IRAM 30 m-telescope together with the Max Planck Institute for Radio Astronomy (MPIfR) bolometer to survey nearly 270 stars of different types for 250GHz... -
BVRIJHK photometry of red LMC supergiants
(BV)J(RI)C observations for 185 and additional JHK observations for 53 red supergiant candidates in the Large Magellanic Cloud (LMC) are presented. The data have been reduced... -
Classification of Late Type Stars
Energy distributions for 33 galactic (super)giants situated mostly in the southern Milky Way in the range from 4800 to 7700 Angstroems with an effective resolution of 10... -
Period-luminosity relations of RSGs in M33 & M31
Based on previously selected preliminary samples of red supergiants (RSGs) in M33 and M31, the foreground stars and luminous asymptotic giant branch stars are further excluded,...
