HerMES: SPIRE galaxy number counts at 250, 350 and 500 microns - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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Abstract: Emission at far-infrared wavelengths makes up a significant fraction of thetotal light detected from galaxies over the age of Universe. Herschel providesan opportunity for studying galaxies at the peak wavelength of their emission.Our aim is to provide a benchmark for models of galaxy population evolution andto test pre-existing models of galaxies. With the Herschel Multi-tieredExtra-galactic survey, HerMES, we have observed a number of fields of differentareas and sensitivity using the SPIRE instrument on Herschel. We havedetermined the number counts of galaxies down to ~20 mJy. Our constraints fromdirectly counting galaxies are consistent with, though more precise than,estimates from the BLAST fluctuation analysis. We have found a steep rise inthe Euclidean normalised counts at <100 mJy. We have directly resolved 15% ofthe infrared extra-galactic background at the wavelength near where it peaks.



Autor: S. J. Oliver Sussex, L. Wang, A. J. Smith, B. Altieri, A. Amblard, V. Arumugam, R. Auld, H. Aussel, T. Babbedge, A. Blain, J. Boc

Fuente: https://arxiv.org/







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