Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Initial Look at the FIR-Radio Correlation within M51a using Spitzer   We present an initial look at the FIR-radio correlation within the
star-forming disk of M51a using {\it Spitzer} MIPS imaging, observed as part of
the {\it Spitzer} Infrared Nearby Galaxies Survey (SINGS), and WSRT radio
continuum data. At an estimated distance of 8.2 Mpc, we are able to probe the
variations in the 70$\micron$/22cm ratios across the disk of M51a at a linearly
projected scale of 0.75 kpc. We measure a dispersion of 0.191 dex, comparable
to the measured dispersion of the global FIR-radio correlation. Such little
scatter in the IR/radio ratios across the disk suggests that we have yet to
probe physical scales small enough to observe a breakdown in the correlation.
We also find that the global 70$\micron$/22cm ratio of M51a is 25% larger than
the median value of the disk, suggesting that the brighter disk regions drive
the globally measured ratio.

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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin