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Warm Molecular Gas in M51: Mapping the Excitation Temperature and Mass of H_2 with the Spitzer Infrared Spectrograph
G. Brunner, K. Sheth, L. Armus +7
We have mapped the warm molecular gas traced by the H_2 S(0) - H_2 S(5) pure rotational mid-infrared emission lines over a radial strip across the nucleus and disk of M51 (NGC 5194…
Spectral Mapping Reconstruction of Extended Sources
J. D. T. Smith, L. Armus, D. A. Dale +6
Three dimensional spectroscopy of extended sources is typically performed with dedicated integral field spectrographs. We describe a method of reconstructing full spectral cubes, w…
Star Formation in NGC 5194 (M51a). II. The Spatially-Resolved Star Formation Law
Robert C. Kennicutt, Daniela Calzetti, Fabian Walter +20
We have studied the relationship between the star formation rate (SFR) surface density and gas surface density in the spiral galaxy M51a (NGC 5194), using multi-wavelength data obt…
Scaling Relations of Spiral Galaxies
S. Courteau, A. A. Dutton, F. van den Bosch +4
We construct a large data set of global structural parameters for 1300 field and cluster spiral galaxies and explore the joint distribution of luminosity L, optical rotation veloci…
Gaps in the cloud cover? Comparing extinction measures in spiral disks
B. W. Holwerda, M. Meyer, M. Regan +11
Dust in galaxies can be mapped by either the FIR/sub-mm emission, the optical or infrared reddening of starlight, or the extinction of a known background source. We compare two dus…
Warm molecular hydrogen in the Spitzer SINGS galaxy sample
H. Roussel, G. Helou, D. J. Hollenbach +12
(simplified) Results on the properties of warm H2 in 57 normal galaxies are derived from H2 rotational transitions, obtained as part of SINGS. This study extends previous extragala…