Extinction Map of Baade's Window
نویسنده
چکیده
Recently Wo zniak & Stanek (1996) proposed a new method to investigate interstellar extinction, based on two band photometry, which uses red clump stars as a means to construct the reddening curve. I apply this method to the color-magnitude diagrams obtained by the Optical Gravitational Lensing Experiment (OGLE) to construct an extinction map of (40 0) 2 region of Baade's Window, with resolution of 30 arcsec. Such a map should be useful for studies of this frequently observed region of the Galactic bulge. The map and software useful for its applications are available via anonymous ftp. The total extinction A V varies from 1:26 mag to 2:79 mag within the (40 0) 2 eld of view
منابع مشابه
ar X iv : a st ro - p h / 02 10 36 7 v 2 3 M ar 2 00 3 1 The Optical Gravitational Lensing Experiment . Is Interstellar Extinction Toward the Galactic Center
Photometry of the Galactic bulge, collected during the OGLE-II microlensing search, indicates high and non-uniform interstellar extinction toward the observed fields. We use the mean I-band magnitude and V −I color of red clump stars as a tracer of interstellar extinction toward four small regions of the Galactic bulge with highly variable reddening. Similar test is performed for the most redde...
متن کاملar X iv : a st ro - p h / 02 10 36 7 v 1 1 6 O ct 2 00 2 1 The Optical Gravitational Lensing Experiment . Is Interstellar Extinction Toward the Galactic
Photometry of the Galactic bulge, collected during the OGLE-II microlensing search, indicates high and non-uniform interstellar extinction toward the observed fields. We use the mean I-band magnitude and V −I color of red clump stars as a tracer of interstellar extinction toward four small regions of the Galactic bulge with highly variable reddening. Similar test is performed for the most redde...
متن کاملA Dynamical Model of the Inner
An extension of Schwarzschild's (1979) galaxy-building technique is presented that, for the rst time, enables one to build Schwarzschild models with known distribution functions (DFs). The new extension makes it possible to combine a DF that depends only on classical integrals with orbits that respect non-classical integrals. With such a combination Schwarzschild's orbits are used only to repre...
متن کاملar X iv : a st ro - p h / 96 07 13 5 v 1 2 5 Ju l 1 99 6 A Large Proper - Motion Survey in Plaut ’ s Low - Extinction
We present preliminary results from the deepest and largest photographic proper-motion survey ever undertaken of the Galactic bulge. Our first-epoch plate material (from 1972-3) goes deep enough (V lim ∼ 22) to reach below the bulge main-sequence turnoff. These plates cover an area of approximately 25 ′ ×25 ′ of the bulge in the low-extinction (A v ∼ 0.8 mag) Plaut field at l = 0 • , b = −8 • ,...
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 کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1996