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On the Clustering of Sub-millimeter Galaxies by Williams, Christina C.; Giavalisco, Mauro; Porciani, Cristiano; Yun, Min S.; Pope, Alexandra; Scott, Kimberly S.; Austermann, Jason E.; Aretxaga, Itziar; Hatsukade, Bunyo; Lee, Kyoung-Soo; Wilson, Grant W.; Cybulski, J. Ryan; Hughes, David H.; Kawabe, Ryo; Kohno, Kotaro; Perera, Thushara; Schloerb, F. Peter is a scholarly article available to read on EtoBox.

What is On the Clustering of Sub-millimeter Galaxies about?

We measure the angular two-point correlation function of sub-millimeter galaxies (SMGs) from 1.1-millimeter imaging of the COSMOS field with the AzTEC camera and ASTE 10-meter telescope. These data yields one of the largest contiguous samples of SMGs to date, covering an area of 0.72 degrees^2 down to a 1.26 mJy/beam (1-sigma) limit, including 189 (328) sources with S/N greater than 3.5 (3). We can only set upper limits to the correlation length r_0, modeling the correlation function as a power-law with pre-assigned slope. Assuming existing redshift distributions, we derive 68.3% confidence level upper limits of r_0 < 6-8 h^-1 Mpc at 3.7 mJy, and r_0 < 11-12 h^-1 Mpc at 4.2 mJy. Although consistent with most previous estimates, these upper limits imply that the real r_0 is likely smaller. This casts doubts on the robustness of claims that SMGs are characterized by significantly stronger spatial clustering, (and thus larger mass), than differently selected galaxies at high-redshift. Using Monte Carlo simulations we show that even strongly clustered distributions of galaxies can appear unclustered when sampled with limited sensitivity and coarse angular resolution common to current s

Author

Williams, Christina C.; Giavalisco, Mauro; Porciani, Cristiano; Yun, Min S.; Pope, Alexandra; Scott, Kimberly S.; Austermann, Jason E.; Aretxaga, Itziar; Hatsukade, Bunyo; Lee, Kyoung-Soo; Wilson, Grant W.; Cybulski, J. Ryan; Hughes, David H.; Kawabe, Ryo; Kohno, Kotaro; Perera, Thushara; Schloerb, F. Peter

Published

2011

Language

EN