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Full-Text Articles in Physical Sciences and Mathematics
An Investigation Of The Dust Content In The Galaxy Pair Ngc 1512/1510 From Near-Infrared To Millimeter Wavelengths, Gl Liu, D Calzetti, Min Yun, Gw Wilson, Bt Draine, K Scott, J Austermann, T Perera, D Hughes, I Aretxaga, K Kohno, R Kawabe, H Ezawa
An Investigation Of The Dust Content In The Galaxy Pair Ngc 1512/1510 From Near-Infrared To Millimeter Wavelengths, Gl Liu, D Calzetti, Min Yun, Gw Wilson, Bt Draine, K Scott, J Austermann, T Perera, D Hughes, I Aretxaga, K Kohno, R Kawabe, H Ezawa
Astronomy Department Faculty Publication Series
We combine new ASTE/AzTEC 1.1 mm maps of the galaxy pair NGC 1512/1510 with archival Spitzer IRAC and MIPS images covering the wavelength range 3.6-160 μm from the SINGS project. The availability of the 1.1 mm map enables us to measure the long-wavelength tail of the dust emission in each galaxy, and in sub-galactic regions in NGC 1512, and to derive accurate dust masses. The two galaxies form a pair consisting of a large, high-metallicity spiral (NGC 1512) and a low-metallicity, blue compact dwarf (NGC 1510), which we use to compare similarities and contrast differences. Using the models of Draine …
Pacs And Spire Photometer Maps Of M 33: First Results Of The Herschel M 33 Extended Survey (Herm33es), C Kramer, C Buchbender, E Xilouris, M Boquien, J Braine, D Calzetti
Pacs And Spire Photometer Maps Of M 33: First Results Of The Herschel M 33 Extended Survey (Herm33es), C Kramer, C Buchbender, E Xilouris, M Boquien, J Braine, D Calzetti
Astronomy Department Faculty Publication Series
Context. Within the framework of the HERM33ES key program, we are studying the star forming interstellar medium in the nearby, metal-poor spiral galaxy M 33, exploiting the high resolution and sensitivity of Herschel. Aims. We use PACS and SPIRE maps at 100, 160, 250, 350, and 500 μm wavelength, to study the variation of the spectral energy distributions (SEDs) with galacto-centric distance. Methods. Detailed SED modeling is performed using azimuthally averaged fluxes in elliptical rings of 2 kpc width, out to 8 kpc galacto-centric distance. Simple isothermal and two-component grey body models, with fixed dust emissivity index, are fitted to …
Mapping Far-Ir Emission From The Central Kiloparsec Of Ngc 1097, K Sandstrom, O Krause, H Linz, E Schinnerer, G Dumas, S Meidt, H Rix, M Sauvage, F Walter, R Kennicutt, D Calzetti
Mapping Far-Ir Emission From The Central Kiloparsec Of Ngc 1097, K Sandstrom, O Krause, H Linz, E Schinnerer, G Dumas, S Meidt, H Rix, M Sauvage, F Walter, R Kennicutt, D Calzetti
Astronomy Department Faculty Publication Series
Using photometry of NGC 1097 from the Herschel PACS (Photodetector Array Camera and Spectrometer) instrument, we study the resolved properties of thermal dust continuum emission from a circumnuclear starburst ring with a radius ~900 pc. These observations are the first to resolve the structure of a circumnuclear ring at wavelengths that probe the peak (i.e. λ ~ 100 μm) of the dust spectral energy distribution. The ring dominates the far-infrared (far-IR) emission from the galaxy – the high angular resolution of PACS allows us to isolate the ring's contribution and we find it is responsible for 75, 60 and 55% …
Enhanced Dust Heating In The Bulges Of Early-Type Spiral Galaxies, C Engelbracht, L Hunt, R Skibba, J Hinz, D Calzetti
Enhanced Dust Heating In The Bulges Of Early-Type Spiral Galaxies, C Engelbracht, L Hunt, R Skibba, J Hinz, D Calzetti
Astronomy Department Faculty Publication Series
Stellar density and bar strength should affect the temperatures of the cool (T ~ 20–30 K) dust component in the inner regions of galaxies, which implies that the ratio of temperatures in the circumnuclear regions to the disk should depend on Hubble type. We investigate the differences between cool dust temperatures in the central 3 kpc and disk of 13 nearby galaxies by fitting models to measurements between 70 and 500 μm. We attempt to quantify temperature trends in nearby disk galaxies, with archival data from Spitzer/MIPS and new observations with Herschel/SPIRE, which were acquired during the first phases of …