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Astron. Astrophys. 349, L69-L72 (1999)


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Letter to the Editor

Interstellar extinction towards the inner Galactic Bulge *

M. Schultheis 1, S. Ganesh 1,2, G. Simon 3, A. Omont 1, C. Alard 3,1, J. Borsenberger 1, E. Copet 4,1, N. Epchtein 6, P. Fouqué 5 and H. Habing 7

1 Institut d'Astrophysique de Paris, CNRS, 98bis Bd Arago, F-75014 Paris, France
2 Physical Research Laboratory, Navarangpura, Ahmedabad 380009, India
3 DASGAL CNRS UMR 8633, Observatoire de Paris, France
4 DESPA CNRS-UMR 8632, Observatoire de Paris, France
5 ESO, Santiago, Chile
6 O.C.A., Nice, France
7 Leiden Observatory, Leiden, The Netherlands

Received 22 June 1999 / Accepted 28 August 1999

Abstract

DENIS observations in the J (1.25 µm) and [FORMULA] (2.15 µm) bands together with isochrones calculated for the RGB and AGB phase are used to draw an extinction map of the inner Galactic Bulge. The uncertainty in this method is mainly limited by the optical depth of the Bulge itself. A comparison with fields of known extinction shows a very good agreement. We present an extinction map for the inner Galactic Bulge ([FORMULA])

Key words: stars: AGB and post-AGB – infrared: stars – ISM: dust, extinction

* Based on observations collected at the European Southern Observatory, La Silla Chile

Send offprint requests to: schulthe@iap.fr

© European Southern Observatory (ESO) 1999

Online publication: September 13, 1999

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