Dust in the Small Magellanic Cloud

Details Dust in the Small Magellanic Cloud Dust in the Small Magellanic Cloud

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spub.rept.....m&link_type=abstract

Progress Report, 1 Nov. 1993 - 15 Apr. 1994 Sao Paulo Univ. (Brazil). Inst. Astronomico e Geofisico.

Other

Cosmic Dust, Interstellar Extinction, Interstellar Matter, Magellanic Clouds, Optical Polarization, Optical Properties, Particle Size Distribution, Polarimetry, Stellar Radiation, Ultraviolet Radiation

Scientific paper

Observations of reddened stars in the Small Magellanic Cloud (SMC) indicate that the interstellar grains in that galaxy may show distinct optical properties from those in the galaxy. The ultimate aim of this research is to determine the extinction law in the direction of these three objects, correlating the results with polarimetric data and building dust models that fit both extinction and polarization. UV extinction and optical polarization data suggest that stars with the 'typical' SMC extinction, i.e., with no bump at bluer wavelengths than the galaxy, have wavelengths of maximum polarization smaller than the galactic average. This shows that the carbon abundance is not the only parameter distinguishing the dust properties for the galaxy and the SMC, the grain size distribution being another distinguishing factor.

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