Interstellar Medium in the M43 Nebula
DOI: 10.48550/arXiv.0901.0092
Bibcode: 2009AcA....59..325G
Gnaciñski, P.
Poland
Abstract
We present a list of interstellar absorption lines in the direction of HD 37061 in the M43 nebula. Some of the absorption lines arise from atomic excited levels that are uncommon in interstellar clouds. The excited levels of FeII are populated by fluorescence. We found a large number of H2 molecular absorption lines arising from vibrationally excited levels. The ortho/para H2 ratio is equal to 2.7. The H2 rotational temperature of vibrational levels 1--5 exceeds 2000 K.
2009
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Acta Astronomica
eHST
5