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The mid- and far-infrared colours of AGB and post-AGB stars
M. A. T. Groenewegen
With the advent of space missions, like SPITZER and ASTRO-F, with sensitive detectors in the near- and mid-infra red covering a reasonable field-of-view and having a good spatial r…
A spectroscopic study of southern (candidate) gamma Doradus stars. I. Time series analysis
P. De Cat, L. Eyer, J. Cuypers +9
We present results of a spectroscopic study of 37 southern (candidate) gamma Doradus stars based on echelle spectra. The observed spectra were cross-correlated with the standard te…
The Metallicity Dependence of the Cepheid Period-Luminosity Relation
M. Romaniello, M. Mottini, F. Primas +3
We have assessed the influence of the stellar iron content on the Cepheid Period-Luminosity (PL) relation by relating the V band residuals from the Freedman et al (2001) PL relatio…
ESO-VLT and Spitzer spectroscopy of IRAS05328-6827: a massive young stellar object in the Large Magellanic Cloud
Jacco Th. van Loon, J. M. Oliveira, P. R. Wood +10
We present the first thermal-infrared spectra of an extra-galactic Young Stellar Object (YSO), IRAS05328-6827 in the HII region LHA 120-N148 in the Large Magellanic Cloud. The obse…
Populations of AGB stars and LPVs in the Galaxy and Local Group
M. A. T. Groenewegen
In this review I will discuss recent developments on the topic of resolved Asymptotic Giant Branch (AGB) stars and Long Period Variables (LPVs) in our Galaxy, the Magellanic Clouds…
Mira Variables in the OGLE Bulge fields
M. A. T. Groenewegen, J. A. D. L. Blommaert
(abridged) The 222000 I-band light curves of variable stars detected by the OGLE-II survey in the direction of the Galactic Bulge have been fitted and have also been correlated wit…
Eclipsing binaries in the Galactic Bulge: candidates for distance estimates
M. A. T. Groenewegen
The 222~000 I-band light curves of variable stars detected by the OGLE-II survey in the direction of the Galactic Bulge have been searched for eclipsing binaries (EBs). A previousl…
Oxygen-rich disk in the V778 Cyg system resolved
R. Szczerba, M. Szymczak, N. Babkovskaia +3
Various scenarios have been proposed to explain the presence of silicate features associated with carbon stars, such as V778 Cyg. We have attempted to constrain these theories by m…