Field color magnitude diagram analysis along the bulge major axis
نویسندگان
چکیده
منابع مشابه
Color-magnitude Diagram Distribution of the Bulge Red Clump Stars – Evidence for the Galactic Bar
The color-magnitude diagrams of ∼ 5 × 10 stars obtained for 13 fields towards the Galactic bulge with the OGLE project reveal a well-defined population of bulge red clump stars. We find that the distributions of the extinction-adjusted apparent magnitudes of the red clump stars in fields lying at l = ±5 in galactic longitude differ by 0.37± 0.025 mag. Assuming that the intrinsic luminosity dist...
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Differential EV −I variations of up to ∼ 0.2 mag on a scale of arcminutes across NGC 3201 are presented in the form of an extinction map. This map, created by calculating average EV −I values for stars in small subregions of the field with respect to a fiducial region, greatly improves the appearance of the CMD of the cluster. We describe how we implemented this technique in detail with our dat...
متن کاملThe Color–magnitude Diagram in Baade’s Window Revisited
We have reanalyzed the OGLE V and I photometry of ∼ 500, 000 stars in Baade’s Window, and we confirm the extinction map published by Stanek (1996). However, we find that the interpretation of the OGLE color–magnitude diagram for the disk stars proposed by Paczyński et al. (1994) was incorrect: the dominant disk population in Baade’s Window is old, and we find no evidence for a large hole in the...
متن کاملThe Color-Magnitude Diagram of composite stellar populations
The theoretical relation between the number of post main sequence stars from stellar populations and their total mass is investigated. This is used to derive some basic relations between the stellar number counts of stellar populations with an age spread and the star formation history which produced them. The main purpose of this investigation is to offer a guideline for the construction of sim...
متن کاملIAC-star: a code for synthetic color-magnitude diagram computation
The code IAC-star is presented. It generates synthetic HR and colormagnitude diagrams (CMDs) and is mainly aimed to star formation history studies in nearby galaxies. Composite stellar populations are calculated on a star by star basis, by computing the luminosity, effective temperature and gravity of each star by direct bi-logarithmic interpolation in the metallicity and age grid of a library ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1993
ISSN: 0004-637X,1538-4357
DOI: 10.1086/186823