Constraints on Galaxy Formation from Cosmic Background Radiations

We review mechanisms for producing temperature and polarization anisotropies in the microwave background radiation, and summarize their relation to the large-scale distribution of matter and to theories of galaxy formation. We also review possible sources of ambiguity in interpreting data, in particular the unknown opacity of the pregalactic gas and the possible contribution of discrete sources of radiation. Strategies for removing these ambiguities are discussed.

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Cosmic Background Radiations

Data Analysis in Astronomy III ◽

10.1007/978-1-4684-5646-2_31 ◽

1989 ◽

pp. 291-318

Author(s):

George F. Smoot

Keyword(s):

Background Radiations ◽

Cosmic Background

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4. Galaxy formation

Transactions of the International Astronomical Union ◽

10.1017/s0251107x00006751 ◽

1985 ◽

Vol 19 (1) ◽

pp. 668-677

Author(s):

Bernard J. T. Jones

Keyword(s):

Galaxy Formation ◽

Large Scale ◽

Background Radiation ◽

Mass Density ◽

Cosmic Background Radiation ◽

Cosmic Background ◽

Scant Attention ◽

The Subject ◽

The Universe

This article surveys the literature from July 1981 to June 1984. It is neither possible nor desirable to refer to all papers on the subject, and accordingly only papers that are generally representative of some particular idea are explicitly mentioned. Galaxy Formation by its very nature has considerable overlap with other areas of cosmology such as the anisotropy of the cosmic background radiation, the question of the mass density of the universe, the nature of the large scale clustering, and detailed observations of galaxies. These are all topics covered by other reports to Commission 47 and the reader will therefore find only scant attention paid here to these important subjects.

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Disturbance of the CBR by Isothermal Perturbations

Symposium - International Astronomical Union ◽

10.1017/s0074180900150570 ◽

1987 ◽

Vol 117 ◽

pp. 393-393

Author(s):

Hideo Kodama ◽

Yasushi Suto ◽

Katsuhiko Sato

Keyword(s):

Galaxy Formation ◽

Background Radiation ◽

Cosmic Background Radiation ◽

Density Fluctuations ◽

Clusters Of Galaxies ◽

Recombination Time ◽

Cosmic Background ◽

Standard Scenario

Following the standard scenario of galaxy formation, density fluctuations with amplitude δ∼10−3 should have been present at the recombination time tR in order that galaxies and clusters of galaxies can be formed. Recent observations of the anisotropy of the cosmic background radiation(CBR), however, indicate that δ is less than 10−4 at tR for adiabatic perturbations in the baryon-dominated universe.

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Ultra High Energy Cosmic Rays from Engine-driven Relativistic Supernovae

Proceedings of the International Astronomical Union ◽

10.1017/s1743921312012707 ◽

2011 ◽

Vol 7 (S279) ◽

pp. 67-70

Author(s):

Sayan Chakraborti

Keyword(s):

Cosmic Rays ◽

High Energy ◽

New Physics ◽

Ultra High Energy ◽

Local Universe ◽

Crucial Step ◽

X Ray ◽

Background Radiations ◽

High Energy Cosmic Rays ◽

Cosmic Background

AbstractThe sources of the highest energy cosmic rays remain an enigma half a century after their discovery. Understanding their origin is a crucial step in probing new physics at energies unattainable by terrestrial accelerators. They must be accelerated in the local universe as otherwise interaction with cosmic background radiations would severely deplete the flux of protons and nuclei at energies above the Greisen-Zatsepin-Kuzmin (GZK) limit. Hypernovae, nearby GRBs, AGNs and their flares have all been suggested and debated in the literature as possible sources. Type Ibc supernovae have a local sub-population with mildly relativistic ejecta which are known to be sub-energetic GRBs or X-Ray Flashes for sometime and more recently as those with radio afterglows but without detected GRB counterparts, such as SN 2009bb. In this talk we present the size-magnetic field evolution, baryon loading and energetics of SN 2009bb using its radio spectra obtained with VLA and GMRT. We show that the engine-driven SNe lie above the Hillas line and they can explain the characteristics of post-GZK UHECRs.

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