Health Nutrition and Population Statistics

2017 ◽  
Author(s):  
Keyword(s):  
Population Statistics

The Long View of Planetary Systems

2018 ◽  
Author(s):  
Karel Schrijver
Keyword(s):  
Solar System ◽  
Milky Way ◽  
Planetary Systems ◽  
Giant Planets ◽  
Milky Way Galaxy ◽  
Population Statistics ◽  
The Past ◽  
General Terms ◽  
The Galaxy ◽  
The Universe

How many planetary systems formed before our’s did, and how many will form after? How old is the average exoplanet in the Galaxy? When did the earliest planets start forming? How different are the ages of terrestrial and giant planets? And, ultimately, what will the fate be of our Solar System, of the Milky Way Galaxy, and of the Universe around us? We cannot know the fate of individual exoplanets with great certainty, but based on population statistics this chapter sketches the past, present, and future of exoworlds and of our Earth in general terms.

scholarly journals A circular polarization survey for radio stars with the Australian SKA Pathfinder

2021 ◽  
Vol 502 (4) ◽  
pp. 5438-5454
Author(s):  
Joshua Pritchard ◽  
Tara Murphy ◽  
Andrew Zic ◽  
Christene Lynch ◽  
George Heald ◽  
...  
Keyword(s):  
Radio Emission ◽  
Brightness Temperature ◽  
Circular Polarization ◽  
Flux Density ◽  
Wide Band ◽  
M Dwarfs ◽  
Square Kilometre Array ◽  
Population Statistics ◽  
Chemically Peculiar ◽  
Radio Stars

ABSTRACT We present results from a circular polarization survey for radio stars in the Rapid ASKAP Continuum Survey (RACS). RACS is a survey of the entire sky south of δ = +41○ being conducted with the Australian Square Kilometre Array Pathfinder telescope (ASKAP) over a 288 MHz wide band centred on 887.5 MHz. The data we analyse include Stokes I and V polarization products to an RMS sensitivity of 250 μJy PSF−1. We searched RACS for sources with fractional circular polarization above 6 per cent, and after excluding imaging artefacts, polarization leakage, and known pulsars we identified radio emission coincident with 33 known stars. These range from M-dwarfs through to magnetic, chemically peculiar A- and B-type stars. Some of these are well-known radio stars such as YZ CMi and CU Vir, but 23 have no previous radio detections. We report the flux density and derived brightness temperature of these detections and discuss the nature of the radio emission. We also discuss the implications of our results for the population statistics of radio stars in the context of future ASKAP and Square Kilometre Array surveys.

scholarly journals U.K. Population Statistics

Nature ◽  
1960 ◽  
Vol 188 (4753) ◽  
pp. 783-783
Keyword(s):  
Population Statistics

scholarly journals Population Statistics and Biological Traits of Endangered Kiso Horse

2011 ◽  
Vol 22 (4) ◽  
pp. 67-72 ◽  
Author(s):  
Masaki TAKASU ◽  
Nana HIRAMATSU ◽  
Teruaki TOZAKI ◽  
Hironaga KAKOI ◽  
Telhisa HASEGAWA ◽  
...  
Keyword(s):  
Biological Traits ◽  
Population Statistics

Population statistics study of radio and gamma-ray pulsars in the Galactic plane

2007 ◽  
pp. 245-251
Author(s):  
Peter L. Gonthier ◽  
Sarah A. Story ◽  
Brian D. Clow ◽  
Alice K. Harding
Keyword(s):  
Gamma Ray ◽  
Galactic Plane ◽  
Population Statistics
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