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Astron. Astrophys. 337, L1-L4 (1998)

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Letter to the Editor

Very cold dust in the peculiar dwarf elliptical galaxy NGC 205 *

Martin Haas

Max-Planck-Institut für Astronomie (MPIA), Königstuhl 17, D-69117 Heidelberg, Germany

Received 16 June 1998 / Accepted 27 June 1998


ISO observations of NGC 205 between 120 and 200 µm resolve the emission from 20-24 K cold dust. It is extended to about 7[FORMULA]5[FORMULA]7[FORMULA]5 with bright concentrations in a 1[FORMULA]5 north-south elongated area, similar to the that seen in HI. Supplemented by IRAS and mm literature data, the photometry of the total galaxy and the central region is disentangled. It indicates the presence of very cold dust below 10 K which would be the first such detection in an elliptical galaxy.

Key words: infrared: galaxies – galaxies: elliptical, peculiar, photometry – fundamental parameters – individual: NGC 205

* Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

Send offprint requests to: M. Haas (e-mail: haas@mpia-hd.mpg.de)

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© European Southern Observatory (ESO) 1998

Online publication: August 6, 1998