Spitzer's View on Edge-On Spiral Disks

Details Spitzer's View on Edge-On Spiral Disks Spitzer's View on Edge-On Spiral Disks

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1805h&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #18.05; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

Scientific paper

Edge-on spiral galaxies offer a unique perspective on spiral galaxies; their vertical structure can be determined and their faint structure can be seen from line-of-sight integration.
We present the first result of our Spitzer/IRAC survey of 30 edge-on spiral disks. The 3.6 and 4.5 micron near-infrared channels allow a clear view of the stellar disk, almost unimpeded by dust extinction.
The 8 micron channel maps the emission of the smallest interstellar grains, the Polycyclic Aromatic Hydrocarbons (PAH). The observations of the PAH interstellar medium (ISM) and the old stellar disk
can be used to study the relative geometry of these components.
We fit two-dimensional models to the stellar and PAH light distributions to determine vertical and radial scales. We present our sample, and the results on the relative disk oblateness for the ISM and stellar disk and the implications on spiral disk stability.

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