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Normal stars - PowerPoint PPT Presentation

Chapter 17

Chapter 17. Quasars and Active Galaxies and Other Ultahigh Energy Sources. What are quasars?. Radio Astronomy began in 1936 when amateur astronomer Grote Reber built a crude radio telescope in his back yard. By 1944 Reber had detected 3 very strong radio sources Sagittarius A ( Sgr A )

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1.39k views • 116 slides

First Stars and Reionization

First Stars and Reionization. Five Answers for Five Questions. Andrea Ferrara. SISSA/International School for Advanced Studies Trieste, Italy. Where did the first stars form ?. First Question. Minimum Mass to Cool via H Ly? line. M inimum Mass for Self-Shielding. Minimum Mass

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The Interplay Between First Stars and Metal Enrichment

Japan-Italy meeting Niigata Dec 2-6 2003. The Interplay Between First Stars and Metal Enrichment. Raffaella Schneider Arcetri Astrophysical Observatory - Florence Enrico Fermi Center - Rome. Andrea Ferrara & Ruben Salvaterra SISSA-Trieste Kazuyuki Omukai NAO-Tokyo. Outline.

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259 views • 18 slides

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Normal stars - PowerPoint PPT Presentation

Chapter 17

First Stars and Reionization

The Interplay Between First Stars and Metal Enrichment