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  1. No Access

    Chapter and Conference Paper

    Observations of HCO+ in B335

    We present HCO+ observations of B335 by JCMT. They show that there is warm gas in the central region and a steep excitation gradient.

    T. I. Hasegawa, C. Rogers, S. S. Hayashi in Submillimetre Astronomy (1990)

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    Chapter and Conference Paper

    Carbon Grains in the Circumstellar Envelope of IRC +10 216

    We have made models of the spectral and spatial distribution of radiation from circumstellar grains in IRC +10 216, incorporating new opacity laws for graphite and amorphous carbon; graphite still seems less s...

    P. G. Martin, C. Rogers in Late Stages of Stellar Evolution (1987)