scholarly journals PISCO: the Parallel Imager for Southern Cosmology Observations

2014 ◽  
Author(s):  
Brian Stalder ◽  
Antony A. Stark ◽  
Stephen M. Amato ◽  
John Geary ◽  
Stephen A. Shectman ◽  
...  
Keyword(s):  
Cosmology Observations

scholarly journals Influence from cosmological uncertainties on galaxy number count at faint limit

2015 ◽  
Vol 30 (28) ◽  
pp. 1550139
Author(s):  
Keji Shen ◽  
Qiang Zhang ◽  
Xin-He Meng
Keyword(s):  
Galaxy Evolution ◽  
Number Density ◽  
Number Count ◽  
Density Prediction ◽  
Evolution Pattern ◽  
Wide Range ◽  
Different Types ◽  
Physical Cosmology ◽  
Cosmology Observations ◽  
Near Future

Counting galaxy number density with wide range sky surveys has been well adopted in researches focusing on revealing evolution pattern of different types of galaxies. As understood intuitively the astrophysics environment physics is intimately affected by cosmology priors with theoretical estimation or vice versa, or simply stating that the astrophysics effect couples the corresponding cosmology observations or the way backwards. In this paper, we try to quantify the influence on galaxy number density prediction at faint luminosity limit from the uncertainties in cosmology, and how much the uncertainties blur the detection of galaxy evolution, with the hope that this trying may indeed help for precise and physical cosmology study in near future or vice versa.

Workshop III — Cosmology: Observations versus theories

Pramana ◽  
2000 ◽  
Vol 55 (4) ◽  
pp. 599-601
Author(s):  
T R Seshadri
Keyword(s):  
Cosmology Observations

scholarly journals The Galactic Evolution of Beryllium

2000 ◽  
Vol 198 ◽  
pp. 389-396 ◽  
Author(s):  
Ann Merchant Boesgaard
Keyword(s):  
Chemical Evolution ◽  
Cosmic Ray ◽  
High Spectral Resolution ◽  
High Signal ◽  
Galactic Chemical Evolution ◽  
Ray Theory ◽  
Signal To Noise ◽  
Metal Abundances ◽  
Cosmology Observations ◽  
The Relationship

The abundance of beryllium has been determined in unevolved stars over a range metal abundances in order to enhance our understanding of the chemical evolution of our Galaxy, cosmic-ray theory, and cosmology. Observations of 27 stars have been made with Keck I with HIRES at high spectral resolution (45,000) and high signal-to-noise ratios (60 - 110 typically). We find a remarkably linear relationship between log N(Be/H) and [Fe/H] with a slope of 0.96 (±0.04). Similarly, the relationship between log N(Be/H) and [O/H] is linear with a slope of 1.45 (±0.04). Beryllium increases at the same rate as Fe, but much faster than O. This provides constraints for and insights into models of Galactic chemical evolution. There is some evidence for an intrinsic spread in Be at a given [O/H] or [Fe/H]. There is no evidence of a plateau in Be at the lowest metallicities down to log N(Be/H) = —13.5.

scholarly journals FOUR FUNDAMENTAL FOREGROUND POWER SPECTRUM SHAPES FOR 21 cm COSMOLOGY OBSERVATIONS

2012 ◽  
Vol 752 (2) ◽  
pp. 137 ◽  
Author(s):  
Miguel F. Morales ◽  
Bryna Hazelton ◽  
Ian Sullivan ◽  
Adam Beardsley
Keyword(s):  
Power Spectrum ◽  
Cosmology Observations
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