'Active galaxies' diaporamas de présentation

Chapter 19

Chapter 19. In the Beginning. Introduction. B y itself, the expansion of the Universe does not prove that there was a big bang; indeed, one could postulate that the Universe had no beginning in time and will have no end.

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An insight into the life of a Cosmologist

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Chapter 31 Galaxies & the Universe

Chapter 31 Galaxies & the Universe. Review & Recap. The Hubble Space Telescope measures black holes that cannot be seen. It does this by precisely measuring the speed of gas and stars around a black hole. This provides clues for the existence of a black hole.

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The Life History of Galaxies and Black Holes

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Quasars and Other Active Galaxies

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Active Galaxies and Quasars!

Active Galaxies and Quasars!. Types of Galaxies. Normal Galaxy and Active Galaxy Normal Galaxy Just a normal galaxy Emits mostly visible radiation Active Galaxy Thousands of times brighter than Normal Galaxy Emit different radiation; more energy, but it is less visible.

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Discovering the Universe Ninth Edition

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What Wavelength Was That?

What Wavelength Was That?. Examining the Electromagnetic Spectrum with Hands-On Activities. Electromagnetic Spectrum. The full range of frequencies , from radio waves to gamma rays, that characterizes light

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INTEGRAL 20 - 40 keV AGN Survey and Luminosity Function

Volker Beckmann NASA Goddard Space Flight Center, Exploration of the Universe Division & Joint Center for Astrophysics, University of Maryland, Baltimore County & C. R. Shrader, N. Gehrels, S. Soldi, N. Produit Extragalactic Surveys Workshop, November 6, 2006.

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Normal and Active Galaxies

Normal and Active Galaxies. Three different types of Galaxies. Spirals. Hubble devised a classification scheme to describe different shapes. Spirals typically have a center of older stars, and spiral arms which are sites of star formation. . Ellipticals.

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Announcements

Announcements. Grades for third exam are now available on WebCT Observing next week counts on the third exam. Quasars and Active Galactic Nuclei. Quasi-stellar objects Redshifts Variability Supermassive black holes Active Galaxies Reading 24.1-24.2, 23.2. Quasars.

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Announcements

Announcements. Test solutions are posted Pick up graded work Homework 13 is due a week from today. A spreadsheet of the data is posted on the web. No class this Friday (Happy Thanksgiving) Project 2 is due a week from Friday, December 1 No planetarium shows or star party tonight

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Active Galactic Nuclei

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*Electromagnetic Radiation

*Electromagnetic Radiation. E l ectromagnetic radiation can be described in terms of a stream of photons. Each photon is traveling in a wave-like pattern, moving at the speed of light and carrying some amount of energy.

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Black Hole Jets

Black Hole Jets. Acceleration of jets Collimation of jets Superluminal motion Evolution of jets. A black hole is observed at a luminosity of 60,000 solar luminosities. The black hole mass must be. at least 2 solar masses less than 2 solar masses exactly 2 solar masses

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AST103 Astronomy 2: The Milky Way University Elective Unit

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Cosmology with the extragalactic gamma-ray background

Cosmology with the extragalactic gamma-ray background. Vasiliki Pavlidou University of Chicago. Outline. EGRB vs CMB: information content Cosmology with the EGRB: constraining the Cosmic Star Formation Rate The future. EGRB vs CMB. CMB EGRB

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