منابع مشابه
Extinction Map of the Galactic center: OGLE-II Galactic bulge fields
We present the reddening (E(V −I)) and Extinction maps in V -band (AV ) and I-band (AI) for 48 Optical Gravitational Lensing Experiment II (OGLE-II) Galactic bulge (GB) fields, covering a range of −11 < l < 11, with the total area close to 11 square degrees. These measurements are based on two-band photometry of Red Clump Giant (RCG) stars in OGLE-II V I maps of GB. We confirm the anomalous val...
متن کاملGlobal dynamics of triaxial galactic models through frequency map analysis
In a previous article (Papaphilippou&Laskar 1996), we used the frequency map analysis for studying the dynamics of the axisymmetric softened version of the logarithmic potential. The method is now applied to its 3-dimensional generalisation in order to deepen our knowledge regarding the dynamics of triaxial power-law galactic models. The principal dynamical features of the system are reviewed w...
متن کاملA Galactic Plane Relative Extinction Map from 2MASS
We present three 14400 square degree relative extinction maps of the Galactic Plane (|b|< 20◦) obtained from 2MASS using accumulative star counts (Wolf diagrams). This method is independent of the colour of the stars and the variation of extinction with wavelength. Stars were counted in 3′ .5× 3′ .5 boxes, every 20′′. 1◦×1◦ surrounding fields were chosen for reference, hence the maps represent ...
متن کاملThe Large-Scale Extinction Map of the Galactic Bulge from the MACHO Project Photometry
We present a (V −R)-based reddening map of about 43 square degrees of the Galactic bulge/bar. The map is constructed using template image photometry from the MACHO microlensing survey, contains 9717 resolution elements, and is based on (V − R)–color averages of the entire color-magnitude diagrams (CMDs) in 4 by 4 arc-minute tiles. The conversion from the observed color to the reddening follows ...
متن کاملThe effect of FIR emission from SDSS galaxies on the SFD Galactic extinction map
We compare the most successful and widely used map of Galactic dust extinction, provided by Schlegel, Finkbeiner & Davis (1998; hereafter SFD), to the galaxy number counts in the Sloan Digital Sky Survey (SDSS) photometric/spectroscopic DR4 sample. We divide the SDSS survey area into 69 disjoint subregions according to the dust extinction provided by SFD and compare the surface number density o...
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ژورنال
عنوان ژورنال: Nature
سال: 1979
ISSN: 0028-0836,1476-4687
DOI: 10.1038/279195a0