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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 253 records · Page 14
All sourcesNASA NTRSDOE OSTI
DOE OSTI2017

Discovery of extreme [O iii]+hβ emitting galaxies tracing an overdensity at z ∼ 3.5 in CDF-south

Using deep multi-wavelength photometry of galaxies from zfourge, we group galaxies at 2.5 6. Many of the EELGs also exhibit Lyα emission. Additionally, we find that many of these sources are clustered in an overdensity in the Chandra Deep Field South, with five spectroscopically confirmed members at z=3.474±0.004. The spatial distribution and photometric redshifts of the zfourge population further confirm the overdensity highlighted by the EELGs.

79 ASTRONOMY AND ASTROPHYSICS↗
NASA NTRS2004

CDF and PDF Comparison Between Humacao, Puerto Rico and Florida

The knowledge of the atmospherics phenomenon is an important part in the communication system. The principal factor that contributes to the attenuation in a Ka band communication system is the rain attenuation. We have four years of tropical region observations. The data in the tropical region was taken in Humacao, Puerto Rico. Previous data had been collected at various climate regions such as desserts, template area and sub-tropical regions. Figure 1 shows the ITU-R rain zone map for North America. Rain rates are important to the rain attenuation prediction models. The models that predict attenuation generally are of two different kinds. The first one is the regression models. By using a data set these models provide an idea of the observed attenuation and rain rates distribution in the present, past and future. The second kinds of models are physical models which use the probability density functions (PDF).

Gonzalez-Rodriguez, Rosana↗
DOE OSTI2011

Status of the Upsilon Polarization Measurement at CDF

The angular distributions of {Upsilon}(1S) {yields} {mu}{sup +}{mu}{sup -} decays are analyzed using a sample of {Upsilon}(1S) mesons in 2.9 fb{sup -1} of data collected at {radical}s = 1.96 TeV. The results of the one-dimensional angular analysis suggest that {Upsilon}(1S) may be longitudinal polarized at high transverse momentum. This observation is largely inconsistent with NRQCD prediction that predicts transverse polarization at high p{sub T}.

43 PARTICLE ACCELERATORS↗