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Learning the Fundamental MIR Spectral Components of Galaxies with Non-Negative Matrix Factorisation
P. D. Hurley, S. Oliver, D. Farrah +2
The mid-infrared (MIR) spectra observed with the \textit{Spitzer} Infrared Spectrograph (IRS) provide a valuable dataset for untangling the physical processes and conditions within…
Herschel observations and a model for IRAS 08572+3915: a candidate for the most luminous infrared galaxy in the local (z < 0.2) Universe
A. Efstathiou, C. Pearson, D. Farrah +17
We present Herschel photometry and spectroscopy, carried out as part of the Herschel ULIRG survey (HERUS), and a model for the infrared to submillimetre emission of the ultralumino…
Cold dust but warm gas in the unusual elliptical galaxy NGC 4125
C. D. Wilson, A. Cridland, K. Foyle +19
Data from the Herschel Space Observatory have revealed an unusual elliptical galaxy, NGC 4125, which has strong and extended submillimeter emission from cold dust but only very str…
Revealing the cold dust in low-metallicity environments: I - Photometry analysis of the Dwarf Galaxy Survey with Herschel
A. Rémy-Ruyer, S. C. Madden, F. Galliano +22
We present new photometric data from our Herschel Key Programme, the Dwarf Galaxy Survey (DGS), dedicated to the observation of the gas and dust in 48 low-metallicity environments.…
Far-infrared Fine-Structure Line Diagnostics of Ultraluminous Infrared Galaxies
Duncan Farrah, Vianney Lebouteiller, Henrik Spoon +16
We present Herschel observations of six fine-structure lines in 25 Ultraluminous Infrared Galaxies at z<0.27. The lines, [O III]52, [N III]57, [O I]63, [N II]122, [O I]145, and [C…
Regional variations in the dense gas heating and cooling in M51 from Herschel far-infrared spectroscopy
T. J. Parkin, C. D. Wilson, M. R. P. Schirm +13
We present Herschel PACS and SPIRE spectroscopy of the most important far-infrared cooling lines in M51, [CII](158 μm), [NII](122 & 205 μm), [OI](63 and 145 μm) and [OIII](88 μm).…