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Technetium and the third dredge up in AGB stars II. Bulge stars
Stefan Uttenthaler, Josef Hron, Thomas Lebzelter +3
We searched for Technetium (Tc) in a sample of bright oxygen-rich asymptotic giant branch (AGB) stars located in the outer galactic bulge. Tc is an unstable element synthesised via…
Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs
C. Reyle, R. -D. Scholz, M. Schultheis +2
We present spectra of 59 nearby stars candidates, M dwarfs and white dwarfs, previously identified using high proper motion catalogues and the DENIS database. We review the existin…
ISO Mid-Infrared Spectroscopy of Galactic Bulge AGB Stars
Joris A. D. L. Blommaert, Martin A. T. Groenewegen, Koryo Okumura +8
To study the nature of Bulge AGB stars and in particular their circumstellar dust, we have analysed mid-infrared spectra obtained with the ISOCAM CVF spectrometer in three Bulge fi…
Near-IR spectroscopy of OH/IR stars in the Galactic Centre
E. Vanhollebeke, J. A. D. L. Blommaert, M. Schultheis +2
Context. Galactic Centre (GC) OH/IR stars can be, based on the expansion velocities of their circumstellar shells, divided into two groups which are kinematically different and the…
Modelling the Galactic Interstellar Extinction Distribution in Three Dimensions
D. J. Marshall, A. C. Robin, C. Reyle +2
The Two Micron All Sky Survey, along with the Stellar Population Synthesis Model of the Galaxy, developed in Besancon, is used to calculate the extinction distribution along differ…
Recent star formation in the inner Galactic Bulge seen by ISOGAL. I - Classification of bright mid-IR sources in a test field
F. Schuller, A. Omont, I. S. Glass +3
Context: The stellar populations in the central region of the Galaxy are poorly known because of the high visual extinction and very great source density in this direction. Aims: T…