HerMES: Herschel-SPIRE observations of Lyman Break Galaxies
Abstract
We present first results of a study of the submillimetre (rest frame far-infrared) properties of z~3 Lyman Break Galaxies (LBGs) and their lower-redshift counterparts BX/BM galaxies, based on Herschel-SPIRE observations of the Northern field of the Great Observatories Origins Deep Survey (GOODS-N). We use stacking analysis to determine the properties of LBGs well below the current limit of the survey. Although LBGs are not detected individually, stacking the infrared luminous LBGs (those detected with Spitzer at 24 microns yields a statistically significant submm detection with mean flux <S_{250}>= 5.9+/-1.4 mJy confirming the power of SPIRE in detecting UV-selected high-redshift galaxies at submillimetre wavelengths. In comparison, the Spitzer 24 microns detected BX/BM galaxies appear fainter with a stacked value of <S_{250}> = 2.7 +/-0.8 mJy. By fitting the Spectral Energy Distributions (SEDs) we derive median infrared luminosities, L_{IR}, of 2.8x10^{12} Lsun and 1.5x10^{11} Lsun for z~3 LBGs and BX/BMs, respectively. We find that L_{IR}. Although sample selection effects may influence this result we suggest that differences in physical properties (such as morphologies, dust distribution and extent of star-forming regions) between z ~3 LBGs and z~2 BX/BMs may also play a significant role.
Keywords
Cite
@article{arxiv.1009.2715,
title = {HerMES: Herschel-SPIRE observations of Lyman Break Galaxies},
author = {D. Rigopoulou and G. E. Magdis and R. J. Ivison and A. Amblard and V. Arumugam and H. Aussel and A. Blain and J. Bock and A. Boselli and V. Buat and D. Burgarella and N. Castro-Rodriguez and A. Cava and P. Chanial and D. L. Clements and A. Conley and L. Conversi and A. Cooray and C. D. Dowell and E. Dwek and S. Eales and D. Elbaz and D. Farrah and A. Franceschini and J. Glenn and M. Griffin and M. Halpern and E. Hatziminaoglou and J. -S. Huang and E. Ibar and K. Isaak and G. Lagache and L. Levenson and N. Lu and S. Madden and B. Maffei and G. Mainetti and L. Marchetti and H. T. Nguyen and B. O'Halloran and S. J. Oliver and A. Omont and M. J. Page and P. Panuzzo and A. Papageorgiou and C. P. Pearson and I. Perez-Fournon and M. Pohlen and D. Rizzo and I. G. Roseboom},
journal= {arXiv preprint arXiv:1009.2715},
year = {2015}
}
Comments
6 pages, 5 figures, accepted for publication in MNRAS HERSCHEL issue