'Cepheid' diaporamas de présentation

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The Milky Way Galaxy

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The Milky Way Galaxy

The Milky Way Galaxy. The Milky Way. We see a band of faint light running around the entire sky. Galileo discovered it was composed of many stars. With unaided eye you can see light and dark patches. Measuring the Milky Way. William Herschel Star Counting Assumed all stars same brightness

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Revision of new diagnostics for TB

Revision of new diagnostics for TB. Churchyard GJ. Overview. Introduction Xpert MTB/RIF Line probe assays Urine LAM Diagnostics pipeline Conclusion. Introduction. The global burden of TB is declining slowly

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ASTRONOMY

ASTRONOMY. Chapter 26 Doubles, Variables, and Clusters. Binary Stars. Most stars that we see are actually contain two or more component stars. The terms binary stars and double stars are the same Binary stars are two (or more) stars held together by their gravitational attraction.

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A New Program of Multi-Year Continuous Phase Coverage Photometry of Alpha UMi

A New Program of Multi-Year Continuous Phase Coverage Photometry of Alpha UMi. by. J. Donald Cline and Michael W. Castelaz (Pisgah Astronomical Research Institute). and Mercedes Lopez-Morales (UNC-Chapel Hill). 202 nd Meeting of the American Astronomical Society

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A Message from the Cepheids?

ET: So Where Is He? Is there alien life in the universe? What are we looking for? How to find them (do they want to be found)? Why should we care about aliens?. A Message from the Cepheids?. John Learned Physics and Astronomy, UH Manoa

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A Message from the Cepheids?

ET: So Where Is He? Is there alien life in the universe? What are we looking for? How to find them (do they want to be found)? Why should we care about aliens?. A Message from the Cepheids?. John Learned Physics and Astronomy, UH Manoa

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Cepheid Variables

Cepheid Variables. Hydrostatic equilibrium . When a stars thermo nuclear fusion equals the pull of gravity the star is in equilibrium Like our sun. Pulsating variable stars .

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Notes 67 - Optional Topic E - Astrophysics

Notes 67 - Optional Topic E - Astrophysics - ------------------------------------------------------------------------------ E .3.9 Spectroscopic Parallax: Luminosity and Stellar Spectra E. 3.10 Stellar Distance with M and L E. 3.11 Spectroscopic Parallax (limited to 10 Mpc)

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The Distance Ladder

The Distance Ladder. Part II. Number of stars=N star *V Sphere: V=4?R 3 /3 Cylinder: V=?R 2 H. R. R. H. (a). (b). Cepheid Variable Stars (part III, IV). Special type of variable star that brightens & dims with a regular period P~L, recall F=L/4?d 2 , known P, F, derive d.

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ABSTRACT

Development & Optimization of a Sensitive & Specific Quantitative Real-Time PCR Assay for Borrelia lonestari HaoQi (Esther) Li Mentors: Allen Richards, Ph.D., Ju Jiang Rickettsial Diseases Department, Infectious Diseases Directorate U.S. NAVAL MEDICAL RESEARCH CENTER

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