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Title: On the Relation of Silicates and SiO Maser in Evolved Stars

Abstract

The SiO molecule is one of the candidates for the seed of silicate dust in the circumstellar envelope of evolved stars, but this opinion is challenged. In this work we investigate the relation of the SiO maser emission power and the silicate dust emission power. With both our own observation by using the PMO/Delingha 13.7 m telescope and archive data, a sample is assembled of 21 SiO v  = 1, J  = 2 − 1 sources and 28 SiO v  = 1, J  = 1 − 0 sources that exhibit silicate emission features in the ISO /SWS spectrum as well. The analysis of their SiO maser and silicate emission power indicates a clear correlation, which is not against the hypothesis that the SiO molecules are the seed nuclei of silicate dust. On the other hand, no correlation is found between SiO maser and silicate crystallinity, which may imply that silicate crystallinity does not correlate with mass-loss rate.

Authors:
;  [1]
  1. Department of Astronomy, Beijing Normal University, Beijing 100875 (China)
Publication Date:
OSTI Identifier:
22663724
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 153; Journal Issue: 4; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CORRELATIONS; COSMIC DUST; EMISSION; MASERS; MASS TRANSFER; MOLECULES; SILICON OXIDES; STAR EVOLUTION; STARS; STELLAR WINDS; TELESCOPES

Citation Formats

Liu, Jiaming, and Jiang, Biwei, E-mail: bjiang@bnu.edu.cn. On the Relation of Silicates and SiO Maser in Evolved Stars. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA6334.
Liu, Jiaming, & Jiang, Biwei, E-mail: bjiang@bnu.edu.cn. On the Relation of Silicates and SiO Maser in Evolved Stars. United States. doi:10.3847/1538-3881/AA6334.
Liu, Jiaming, and Jiang, Biwei, E-mail: bjiang@bnu.edu.cn. Sat . "On the Relation of Silicates and SiO Maser in Evolved Stars". United States. doi:10.3847/1538-3881/AA6334.
@article{osti_22663724,
title = {On the Relation of Silicates and SiO Maser in Evolved Stars},
author = {Liu, Jiaming and Jiang, Biwei, E-mail: bjiang@bnu.edu.cn},
abstractNote = {The SiO molecule is one of the candidates for the seed of silicate dust in the circumstellar envelope of evolved stars, but this opinion is challenged. In this work we investigate the relation of the SiO maser emission power and the silicate dust emission power. With both our own observation by using the PMO/Delingha 13.7 m telescope and archive data, a sample is assembled of 21 SiO v  = 1, J  = 2 − 1 sources and 28 SiO v  = 1, J  = 1 − 0 sources that exhibit silicate emission features in the ISO /SWS spectrum as well. The analysis of their SiO maser and silicate emission power indicates a clear correlation, which is not against the hypothesis that the SiO molecules are the seed nuclei of silicate dust. On the other hand, no correlation is found between SiO maser and silicate crystallinity, which may imply that silicate crystallinity does not correlate with mass-loss rate.},
doi = {10.3847/1538-3881/AA6334},
journal = {Astronomical Journal (Online)},
number = 4,
volume = 153,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}