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Large non-Gaussianity from axion inflation
Inflaton interactions, such a the ones responsible for preheating after inflation, might lead to a strong non-Gaussianity in Cosmic Microwave Background.
Dynamics of space storm
A team from the U. of Alberta was able to observe a space storm in its full dynamics – at least during first minutes from its birth. For that, they used a network of cameras located in multiple places within Canada – you can see exact location of vertices of the grid on the video [...]
One step for a Man
Nature News has decided to start running a Twitter microblog devoted to the history of Apollo 11 mission – the first manned mission to the Moon. They will basically twit all the steps of the mission, to the Moon and back, day after day, event after event as if it was happening today, in 2009. [...]
LISA technology and instrumentation
Oliver Jennrich (European Space Agency) has prepared a large review on technical aspects of LISA (space laser interferometer) mission – the project is extremely complicated for realization, many technologies are not even yet fully developed, and various prototypes will have to be launched. Yet, possible payout is so huge – even including possible detection of [...]
A bit about climate change
Recently, an idea that sharp terrestrial climate change might be directly correlated to spiral arm passages of the Solar system became very popular. Namely, certain correlations of times of spiral arm passage with timing of ice ages and abundance of in fossils were claimed to be found (in the latter case, effective abundance of grows [...]
Susskind’s lectures on cosmology
Another amazing set of 8 lectures by Lenny Susskind – cosmology this time. Thanks for sharing this, Stanford! P.S. If you were unable to see embedded video, here is the link to the playlist I’ve created for you. Live Football
Other interesting things in ArXiv (12 Jun 2009)
Wayne Hu. Acceleration from modified gravity: lessons from worked examples. The main question Wayne Hu discusses in this minireview is “How can we distinguish dark energy from modified gravity theories if the former and the latter provide the same predictions for cosmological dynamics?” He is particularly focused on DGP and models. His answer is the [...]
Lithium problem
Apart from being a very nice review of Big Bang Nucleosynthesis (BBN), recent paper by Karsten Jedamzik and Maxim Pospelov discusses an important open problem in the physics of BBN. In short, the lithium problem in physics of Big Bang Nucleosynthesis is seeming underproduction of . What do we mean by that? Well, the lithium [...]
Rocky Kolb’s lecture on Dark Universe
… namely, about dark matter and dark energy as you may imagine. The lecture itself (2009 Buhl lecture at Carnegie Mellon U) is actually very clear and suitable for newcomers/non-scientists. So, if you want to know in some details (more or less technical) what the modern cosmology is all about, please check out this lecture.
Other interesting things in ArXiv (11 Jun 2009)
Basically, there were so many interesting and useful papers (or at least they were useful for me) – lecture notes, reviews – that it will give me hard time posting reviews of all of them here – since I am lazy, I’ll just try to list some of them. Umut Gursoy et al. “Thermal Transport [...]
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Large non-Gaussianity from axion inflation
January 31, 2012 14:01 -
On strong disorder renormalization
March 18, 2011 20:03 -
Relaunching NEQNET
January 20, 2011 21:01 -
Saturday’s photoguess: what does this monkey symbolize?
June 20, 2009 19:06 -
Dynamics of space storm
June 19, 2009 12:06
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Micro: Can 2 question provide a common solution? Black holes, information loss paradox and Ultra high energy cosmic rays. ...
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James Ph. Kotsybar: SAGITTARIUS A* -- James Ph. Kotsybar Mysteriously cloaked, obscure despite Interior illuminating glare, Long ...
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cad: The presentation can be found in several formats at http://pirsa.org/08110051/...
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Leo: Ok I have a question: if a black hole is supermassive, say 100 billion solar mass, let's suppose Alice fells int...
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superkuh: I am glad you are back! No more disapointing weekly refreshings of that monkey....
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Ariel Amir: Very interesting, thanks. It indeed seems to be very close to what we discuss here. I wonder whether the distributi...
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