1. HELLO!
I am Shilpa Bhandari.
I am here for NAO-2016.

2. Multi wavelength
Astronomy

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!