Letter to the Editor
The temperature of non-spherical interstellar grains
N.V. Voshchinnikov 1,
D.A. Semenov 1 and
Th. Henning 2
Received 5 July 1999 / Accepted 11 August 1999
A model of spheroidal particles is used to calculate the steady-state temperature of dust grains immersed in the interstellar radiation field. It is found that the temperature of non-spherical grains with the aspect ratios deviates from that of spheres less than 10 %. More elongated or flattened particles are usually cooler than spheres of the same mass and in some cases the temperatures may differ by even about a factor of 2. The shape effects increase with the infrared absorptivity of the grain material and seem to be more important in dark interstellar clouds.
Key words: radiation mechanisms: thermal ISM: dust, extinction infrared: ISM: continuum
Send offprint requests to: N.V. Voshchinnikov (firstname.lastname@example.org)
This article contains no SIMBAD objects.
© European Southern Observatory (ESO) 1999
Online publication: August 25, 1999