Silicate Feature Variation in Long-Period Variable Stars. I. Initial Observations

Details Silicate Feature Variation in Long-Period Variable Stars. I. Initial Observations Silicate Feature Variation in Long-Period Variable Stars. I. Initial Observations

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...477..825c&link_type=abstract

Astrophysical Journal v.477, p.825

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11

Stars: Circumstellar Matter, Ism: Dust, Extinction, Infrared: Stars, Stars: Variables: Other Long-Period Variables

Scientific paper

We report new mid-infrared spectra of five bright, long-period variable (LPV) stars, as well as related objects, obtained at the Wyoming Infrared Observatory with Denver University's medium-resolution CAESR instrument. The data, when combined with low-resolution spectrometer spectra from IRAS, show variation of the silicate feature with phase of the LPV. We perform a calculation for impingement time of the shock on the circumstellar dust shell to demonstrate that this variation could be the result of a shock-shell interaction.

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