Cosmic reionization after Planck

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Cosmic Reionization Redux

We show that numerical simulations of reionization that resolve the Lyman Limit systems (and, thus, correctly count absorptions of ionizing photons) have converged to about 10% level for 5 < z < 6.2 and are in reasonable agreement (within 10%) with the SDSS data in this redshift interval. The SDSS data thus constraint the redshift of overlap of cosmic Hii regions to zOVL = 6.1 ± 0.15. At higher...

متن کامل

Physics of Cosmic Reionization

The study of cosmic reionization has acquired increasing significance over the last few years because of various reasons. On the observational front, we now have good quality data of different types at high redshifts (quasar absorption spectra, radiation backgrounds at different frequencies, cosmic microwave background polarization, Lyα emitters and so on). Theoretically, the importance of the ...

متن کامل

Simulating Cosmic Reionization

The first billion years of the history of the Universe, commonly referred to as the Cosmic Dark Ages and the Epoch of Reionization, constitute a crucial missing link in our understanding of the evolution of the intergalactic medium and the formation and evolution of galaxies. As gravity gradually amplified the small density contrasts in this darkmatter-dominated universe, structure arose hierar...

متن کامل

Planck intermediate results - XLVII. Planck constraints on reionization history

We investigate constraints on cosmic reionization extracted from the Planck cosmic microwave background (CMB) data. We combine the Planck CMB anisotropy data in temperature with the low-multipole polarization data to fit ΛCDM models with various parameterizations of the reionization history. We obtain a Thomson optical depth τ = 0.058±0.012 for the commonly adopted instantaneous reionization mo...

متن کامل

The infancy of cosmic reionization

We consider the early stages of cosmic hydrogen or helium reionization, when ionizing sources were still rare. We show that Poisson fluctuations in the galaxy distribution substantially affected the early bubble size distribution, although galaxy clustering was also an essential factor even at the earliest times. We find that even at high redshifts, a significant fraction of the ionized volume ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters

سال: 2015

ISSN: 1745-3933,1745-3925

DOI: 10.1093/mnrasl/slv134