Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-20
Astronomy and Astrophysics
Astrophysics
33 pages, 24 figures, 8 tables, accepted for publication in the February 2002 issue of AJ. High resolution version: http://w
Scientific paper
10.1086/338430
We present a new technique based on multi-band near ultraviolet and optical photometry to measure both the stellar intrinsic properties, ie luminosity and effective temperature, and the interstellar dust extinction along the line of sight to hundreds of stars per square arcminute. The yield is twofold. On the one hand, the resulting reddening map has a very high spatial resolution, of the order of a few arcseconds, and can be quite effectively used in regions where the interstellar material is patchy, thus producing considerable differential extinction on small angular scales. On the other hand, combining the photometric information over a wide baseline in wavelength provides an accurate determination of temperature and luminosity for thousands of stars. As a test case, we present the results for the region around Supernova 1987A in the Large Magellanic Cloud imaged with the WFPC2 on board the Hubble Space Telescope.
Kirshner Robert P.
Panagia Nino
Romaniello Martino
Scuderi Salvatore
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