منابع مشابه
Chromospherically Active Stars in the Galactic Bulge
We present the results from the discovery and study of ∼ 3000 chromospherically active giant and subgiant stars toward the Galactic bulge. We find that these stars are predominantly RS CVn binaries with rotation periods between 10 and 100 days. We discover that the average rotational period of these stars decreases with their distance from the Galactic plane. We find that the primary stars in t...
متن کاملCentral Stars of Planetary Nebulae in the Galactic Bulge
Context. Optical high-resolution spectra of five central stars of planetary nebulae (CSPN) in the Galactic bulge have been obtained with Keck/HIRES in order to derive their parameters. Since the distance of the objects is quite well known, such a method has the advantage that stellar luminosities and masses can in principle be determined without relying on theoretical relations between both qua...
متن کاملLensing of unresolved stars towards the Galactic Bulge
This paper presents an analysis of lensing of unresolved background stars. Previous calculations of the lensing rates and optical depths considered only resolved stars. However, if a faint unresolved star lens is close enough to a resolved star, the event will be seen by the microlensing experiments and attributted to the bighter star. The blending biases the duration, making the contribution o...
متن کاملChemodynamical analysis of bulge stars for simulated disc galaxies
We analyse the kinematics and chemistry of the bulge stars of two simulated disc galaxies using our chemodynamical galaxy evolution code GCD+. First we compare stars that are born inside the galaxy with those that are born outside the galaxy and are accreted into the centre of the galaxy. Stars that originate outside of the bulge are accreted into it early in its formation within 3 Gyrs so that...
متن کاملSpatial Diffusion of Stars in the Inner Galactic Bulge
Star formation in the inner few hundred pc of the Galactic bulge occurs in a flattened molecular layer called the central molecular zone (CMZ). Serabyn & Morris (1996) suggest that the star formation in the CMZ has been sustained for the lifetime of the Galaxy, and that the resulting agglomeration of stars formed in the CMZ has resulted in the prominent r−2 stellar density cusp at the Galactic ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1993
ISSN: 0074-1809
DOI: 10.1017/s0074180900123344