Steve submits the following for best paper title ever, astro-ph/0509039: “Local Pancake Defeats Axis of Evil” by Chris Vale. I wonder if Chris has informed North Korea, Iraq, and Iran that they have been defeated by a local pancake (is it better to be defeated by a nonlocal pancake?)
Actually this paper is about a very interesting subject. One can learn all sorts of interesting things about the cosmological history of our universe from the angular spectrum of the cosmic background radiation. I remember as a graduate student, when I thought I might go into astrophysics, taking a class in which we calculated this spectrum for all sorts of different cosmological models. The bumps in the spectrum across different spherical harmonics were distinctly different for many different models. Well now, thanks to experiments like WMAP, we have exceedingly good information about this spectrum (the music of the univerese, in poetic language.) This allows us to very nicely rule out all sorts of models about the early history of our universe. Interestingly, however, there is a possible unexplained feature in the spectrum. This is that the l=2 and l=3 components appear to be correlated. One explanation of this effect is simply that this is a statistical fluke. This explanation is commonly refered to as the “axis of evil” theory! The “local pancake” in the title of the paper refers to the authors theory about this l=2,l=3 anomoly: he postulates that it is the effect of gravitational lensing due to the structure of mass in our local neighborhood (bet you didn’t know we lived in a pancake did you?) This lensing, the author claims, will have a consequence for the l=1 (dipole) term. But why does this change the l=2, l=3 components? Because the l=1 dipole term is usually subtracted out from the data because it has large components due to our proper motion with respect to the cosmic background radiation. The author claims that the lensing effect causes this l=1 dipole term to be subtracted incorrectly. Any good astrophysicists out there slumming on a quantum blog care to comment?
I was just given a ride in a car that used to belong to Chris, and the (entirely reasonable) nickname that has been proposed for said car makes his proposed defeat of the axis of evil with pancakes seem entirely within character.
Anomalous octopole still at large…