Scattered Light Echoes From SN 1998bu

Details Scattered Light Echoes From SN 1998bu Scattered Light Echoes From SN 1998bu

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21341207l&link_type=abstract

American Astronomical Society, AAS Meeting #213, #412.07; Bulletin of the American Astronomical Society, Vol. 41, p.218

Astronomy and Astrophysics

Astronomy

Scientific paper

Scattered light echoes offer one of the most effective means to study the structure and make-up of circumstellar and interstellar dust and gas. These light echoes not only provide exact three-dimensional positions of scattering dust, but they can also be used to determine the dust's composition, size, and number density. However, they are very rare and have only been unambiguously resolved around a handful of sources. Here, we present new data and analyses of echoes previously discovered around SN 1998bu. Like SN 1991T (see poster by Thormann et al.), this supernova was a type Ia and has illuminated an hourglass-shaped circumstellar nebula up to 30 lt-yr in size. However SN 1998bu has also illuminated a plane of interstellar material 300-700 lt-yr in front of the supernova. We interpret this plane as a 100 lt-yr thick dust lane in the host-galaxy's (M96) disk.

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