Updated 34-band Photometry for the SINGS/KINGFISH Samples of Nearby Galaxies

Abstract

We present an update to the ultraviolet-to-radio database of global broadband photometry for the 79 nearby galaxies that comprise the union of the KINGFISH (Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel) and SINGS (Spitzer Infrared Nearby Galaxies Survey) samples. The 34-band data set presented here includes contributions from observational work carried out with a variety of facilities including GALEX, SDSS, Pan-STARRS1, NOAO, 2MASS, Wide-Field Infrared Survey Explorer, Spitzer, Herschel, Planck, JCMT, and the VLA. Improvements of note include recalibrations of previously published SINGS BVR C I C and KINGFISH farinfrared/submillimeter photometry. Similar to previous results in the literature, an excess of submillimeter emission above model predictions is seen primarily for low-metallicity dwarf or irregular galaxies. This 33-band photometric data set for the combined KINGFISH+SINGS sample serves as an important multiwavelength reference for the variety of galaxies observed at low redshift. A thorough analysis of the observed spectral energy distributions is carried out in a companion paper.

Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: The KINGFISH Sample

“…With a small number of adjustable parameters, the DL07 model reproduces the observed spectral energy distribution (SED) of the dust emission for a variety of astrophysical systems, giving some confidence in the reliability of dust masses estimated using the model. The DL07 model has been found to be consistent with the 3.6µm-500µm emission from the dust in the star-forming galaxies NGC 628 and NGC 6946 , the dust across M31 (Draine et al 2014), the emission from annular rings in the KINGFISH galaxy sample (Hunt et al 2015), and the overall dust SEDs from KINGFISH galaxies (Dale et al 2017).…”

Spatially Resolved Dust, Gas, and Star Formation in the Dwarf Magellanic Irregular NGC 4449*

“…Interpolation between the two Planck bands at 850 and 1380μm predicts a flux of 0.53Jy at 1100μm for this galaxy, implying that our recovered flux of ∼0.4Jy (Table 2) is a little over 70% of the total. Although the Planck data may suffer from a modest flux increase owing to potential foreground and background source contamination (Dale et al 2017), our AzTEC observations are below the Planck interpolated flux, although not significantly when uncertainties are included. Some of the discrepancy may be due to the fact that we do not recover all the extended millimeter emission from the galaxy.…”

“…The flux of 0.47Jy is about 10% lower than the value of 0.53Jy from the interpolation of the Planck photometry. As already stated in Section 2.3, this small discrepancy could be due to contamination from foreground and background sources in the Planck data (Dale et al 2017). …”

“…The KINGFISH sample and its parent SINGS sample are representative of starforming galaxies within the local 30Mpc (Kennicutt et al 2003) and are therefore reasonable templates against which to compare our spatially resolved results. Measurements at 850μm obtained with SCUBA are available for 27 of the 79 galaxies in Dale et al (2017); an additional 14 galaxies have Planck photometry. Of these 41 galaxies, 38 were observed with both the SST and HSO, and the remaining 3 (MRK 33, NGC 5033, and NGC 7552) were observed with SST only.…”

“…The black triangle with error bars is the mean value of the central region of NGC 4449, as shown in Figure 4, as well. The infrared to millimeter color-color integrated data of 41 nearby galaxies from Dale et al (2017) are shown as blue and red symbols, together with 1σ error bars. The 1100μm data of the galaxies are obtained from either the interpolation of the Planck data (red) or the extrapolation of the SCUBA 850μm measurements (blue).…”