The three micron 'ice' band in grain mantles

Details The three micron 'ice' band in grain mantles The three micron 'ice' band in grain mantles

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...117..132h&link_type=abstract

Astronomy and Astrophysics, vol. 117, no. 1, Jan. 1983, p. 132-140. Research supported by the Nederlandse Organisatie voor Zuiv

Astronomy and Astrophysics

Astrophysics

69

Infrared Absorption, Interstellar Extinction, Interstellar Matter, Late Stars, Polarization (Waves), Protostars, Absorption Spectra, Astronomical Spectroscopy, Stellar Mass Ejection, Water

Scientific paper

Attention is given to the influence of different mantle constituents on extinction and polarization due to H2O absorption in grain mantles, particularly the 3250/cm band. With respect to BN, the simultaneous reproduction of the extinction and polarization band shapes occurs by normal size particles containing mixtures of H2O with other molecules. As regards the 3-micron absorption in OH 231.8 plus 4.2, the data can be best fitted with pure amorphous H2O grains which have been heated to (or created at) about 80 K. The variation in grain mantle composition between young stellar objects and late-type stars loosing mass is attributed to a fundamental difference in grain formation and evolution.

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