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AS2020: Astronom ía Contemporánea Clase # 13 Cosmología

AS2020: Astronom ía Contemporánea Clase # 13 Cosmología. Profesor: Jos é Maza Sancho 10 Noviembre 2010. Distances of Galaxies. Radar ranging: Astronomical unit Stellar parallax Standard candles: Main-sequence fitting. Cepheid Variables.

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AS2020: Astronom ía Contemporánea Clase # 13 Cosmología

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  1. AS2020: Astronomía ContemporáneaClase # 13Cosmología • Profesor: José Maza Sancho • 10 Noviembre 2010

  2. Distances of Galaxies • Radar ranging: Astronomical unit • Stellar parallax • Standard candles: • Main-sequence fitting

  3. Cepheid Variables • In 1912 Miss Henrietta Leavitt discovered the period-luminosity relation.

  4. Type Ia Supernovae • MB(max) ~ -19.5 (L ~ 5x109 Lo) • MB(max) versus rate of decline

  5. Hubble’s Law.

  6. Distance Chain Summary • Radar ranging • Parallax • Main-sequence fitting • Cepheid variables • Type Ia supernovae • Hubble’s law

  7. How do distance measurements tell us the age of the universe. • Age 12 ~ 15 billion years • Age (CMB) ~ 13.7 billion years

  8. The Horizon of the Universe

  9. How did galaxies form?

  10. Galactic Collisions

  11. NGC 4038 + 4039

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