Discovery of PAHs in the Halo of NGC 5907

Details Discovery of PAHs in the Halo of NGC 5907 Discovery of PAHs in the Halo of NGC 5907

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99..130i&link_type=abstract

Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.130

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Scientific paper

We report the discovery of mid-IR aromatic hydrocarbon spectral features in the halo of the edge-on galaxy, NGC 5907. This galaxy has a low star formation rate and previous searches for high latitude ionized gas and optically absorbing dust produced only upper limits. We have used archival ISO data in the LW2, LW5, LW6, LW7, LW8, and LW10 bands of ISOCAM and find high latitude emission in the 7.7 and 11.3 micron features as well as the combined 6.2, 7.7, and 8.6 micron features of LW2. The high latitude emission is highly structured, similar to that seen in other galaxies in different wavebands, and have characteristic scale heights of 3 to 5 kpc. Note that there is some controversy about using the term PAH for the mid-IR spectral features, but we use it here for consistency with most of the literature.

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