Accueil > Séminaires d’Astrophysique > Automne 2006 > Atlas and Catalog of Dark Clouds Based on Digitized Sky Survey I


Atlas and Catalog of Dark Clouds Based on Digitized Sky Survey I

Kazuhito DOBASHI (Tokyo Gakugei University)

Par Stephane Charpinet - 8/01/2007


Séminaires d’Astrophysique


l’Observatoire Midi-Pyrénées

Séminaire de

Kazuhito DOBASHI

(Tokyo Gakugei University)

Jeudi 5 Octobre 2006 à 11h

LATT - Salle Coriolis

Atlas and Catalog of Dark Clouds Based on Digitized Sky Survey I

In this talk, I will introduce a quantitative atlas and catalog of dark clouds derived by using the optical database Digitized Sky Survey. Applying a traditional star-count technique to 1043 plates contained in the database, we produced an Av map covering the entire region in the galactic latitude range |b|<40 deg. Based on the Av map drawn at the two different angular resolutions 6 and 18, we identified 2448 dark clouds and 2840 clumps located inside them. Some physical parameters, such as the position, extent, and optical extinction, were measured for each of the clouds and clumps. We also searched for counterparts among already known dark clouds in the literature. The Av map and a list of the identified clouds and clumps were summarized as an atlas and catalog of dark clouds. Printed version of the data was published last year in a special issue of the Publications of the Astronomical Society of Japan (Dobashi et al. 2005, PASJ, Vol. 57, No. SP1, pp. S1-S386). Digital version of the data, i.e., a FITS file for the Av map and an ASCII file for the catalog, is now available at our home page ( tenmon/Atlas/index.html). I hope that our data will be helpful for various studies of the interstellar medium in the future.



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