Interstellar medium in the M 43 nebula

Details Interstellar medium in the M 43 nebula Interstellar medium in the M 43 nebula

2008-12-31

arxiv.org/abs/0901.0092v3

Acta Astron.59:325,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Scientific paper

We present a list of interstellar absorption lines in the direction of HD 37061 in the M 43 nebula. Some of the absorption lines arise from atomic excited levels that are uncommon in interstellar clouds. The excited levels of Fe II 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.

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