Saturday, November 5, 2011

Day 127

Saturday.  I'm going to work like it's Sunday (i.e., as if there is a deadline---Monday---looming).  ...but I keep on looking for tickets to Yaounde, carshare in Bonn, drivers license in Germany...  I'll be lucky if I'm at work by 11am.  [Sunday--I finished the reply to MNRAS referee report at 2am.]


1111.0631
Cosmic flows in the nearby universe from Type Ia supernovae
Turnbull, Hudson, Feldman, Hicken, Kirshner, Watkin


Present "minimal variance" bulk flow measurements based on the "First Amendment" compilation of 245 Type Ia SNe peculiar velocities and find a bulk flow of 249 pm 76 km/s in the direction l=319 pm 18 deg, b=7 pm 14 deg.  The SNe bulk flow is consistent with the expectations of LCDM, but also marginally consistent with the bulk flow of a larger compilation of non-SNe peculiar velocities (Watkins, Feldman, Hudson 2009).  Compare the SNe peculiar velocity to predictions of the PSCz galaxy density field, and find Omega_m^0.55 sigma_8 = 0.40 pm 0.07, which is in agreement with LCDM.  However, the PSCz density field fails to account for 150 pm 43 km/s of the SNe bulk motion.

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