Cosmology and Astrophysics with Galaxy Clusters

ISAS astro seminar

Prof. Daisuke Nagai (Yale)
Thursday December 25, 11:00 am
1134 : Bldg-A 1F Nyusatsu room

Title:  Cosmology and Astrophysics with Galaxy Clusters

Abstract: 
Galaxy clusters are the most recently formed cosmological objects in
the universe, making them ideal for studying the interplay between
cosmology and baryonic physics in structure formation. Understanding
their formation and growth requires not only an understanding of the
baryonic physics behind gas cooling, star and black hole formation,
and feedback processes, but also the detailed dynamics of how gas
accretes from the cosmic filaments onto the virialization regions in
the outskirts of galaxy clusters throughout their lifetime. Recent
X-ray and microwave observations have revealed detailed thermodynamic
structure of the hot X-ray emitting plasma from their cores to the
virial radii, making comparisons of baryonic component in simulations
to observations a strong cosmological probe. In this talk, I will
review recent advances in our understanding of cluster astrophysics
and discuss future prospects, opportunities and challenges (including
upcoming measurement of turbulent gas motions with ASTRO-H) a for
the use of galaxy clusters as a precision cosmological probe.

http://physics.yale.edu/people/daisuke-nagai

Adamantia Paizis

My old friend in Italy.

http://www.iasf-milano.inaf.it/~ada/

Searches and constraints of sterile neutrino dark matter

Prof. Shunsaku Horiuchi (Virginia Tech)
Monday December 22, 11:00 am

Abstract: 
The cold dark matter cosmological paradigm has been extremely successful in explaining cosmic structure on large scales. Yet, it has constantly been challenged by observations that probe small-scale structures. I will first introduce these challenges, and discuss how warm dark matter provides an alternative that help resolve such small-scale issues whilst maintaing the successes on large scales. From the particle perspective, I will focus on sterile neutrinos, one of th leading warm dark matter candidates. Finally, anomalous 3.5 keV lines have recently been reported, which may be interpreted as sterile neutrino dark matter decay signals. I will discuss implications of this signal in the context of sterile neutrino cosmology. 

http://www.phys.vt.edu/~horiuchi/HOME.html

かみのけ座銀河団に見つかったサブハローの「すざく」による観測

天文学会年会
佐々木 亨　東京理科大学
2014年9月11日（木）午前（11:00-13:00） ［A会場］

Astropy

http://docs.astropy.org/en/stable/index.html

newer than pyfits

A&A paper, 2013

http://www.aanda.org/articles/aa/abs/2013/10/aa22068-13/aa22068-13.html

Linked: How Everything Is Connected to Everything Else and What It Means for Business, Science, and Everyday Life

新ネットワーク思考―世界のしくみを読み解く

Professor Albert-László Barabási

http://barabasilab.com/LinkedBook/

Contact: The Day After

http://www.scientificamerican.com/article/contact-the-day-after/

2011-01