Multiwavelength astronomy
- 1. HELLO! I am Shilpa Bhandari. I am here for NAO-2016.
- 3. Uncovering the Universe! Let’s get started!
- 4. “Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious.” -Stephen Hawking
- 5. Electromagnetic Spectrum ✘Collection of all elctromagnetic radiations. ✘Wavelength Variation
- 6. Radio Astronomy Biggest Radio Telescope in China/Image Source: Universe Today “Astronomy based on radio wave” Wavelength range of radio wave: 1 mm-100km Sources: Quasars, Pulsars, Dust Clouds
- 7. Microwave Astronomy Baby Picture of the universe/Image Source: European Space Agency(ESA) “Astronomy based on microwave radiation” Wavelength range of microwave radiation: 1mm-100cm Sources : Cosmic Microwave Background Radiation, Supermassive Black Holes
- 8. Infrared Astronomy Near-Infrared View of Uranus/Keck Observatory, Hawaii “Astronomy based on infrared ” Wavelength range of infrared: 700 nm-1mm All bodies with temperature emit infrared radiations
- 9. Optical Astronomy Hubble Ultra Deep Field Image in visible range /NASA “Astronomy based on visible light” Wavelength range of visible light : 400nm-700nm Largely affected by light pollution
- 10. Ultraviolet Astronomy Image Source: NASA “Astronomy based on ultraviolet radiation” Wavelength range of ultraviolet radiation:10nm-320nm Sources : supernova remnants, very hot stars, and nova.
- 11. X-Ray Astronomy Aurora of Jupiter in X-Ray/Chandra X-Ray Observatory (NASA) “Astronomy based on X-Rays” Wavelength range of X-Rays: 1 Å -10 Å Sources : Pulsars, Galaxies, Moons, Super massive black holes
- 12. Gamma –ray Astronomy Solar flare of 2013- Fermi Gamma Ray Space Telescope (NASA) “Astronomy based on radio wave”“Astronomy based on radio wave” “Astronomy based on Gamma rays” Wavelength range of Gamma rays: <10 Pico meter Sources : Accretion disks, neutron stars ,pulsars, supernova explosions, radioactive decay
- 13. Effects of Atmosphere Astronomical Seeing Scattering Absorption
- 14. Astronomical Seeing Refraction by atmosphere Blurring of Objects
- 15. Scattering Image Source: Universe Today Atmosphere scatters light reflected by celestial bodies. Changes original appearance of the body.
- 16. Absorbing Source: http://csep10.phys.utk.edu/astr162/lect/light/windows.html Figure: The amount of absorption at different wavelengths in the atmosphere
- 17. THANKS! Any questions? Let’s have a Q/A session!