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

Multi wavelength Astronomy

Uncovering the Universe!Let’s get started!

“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

Electromagnetic Spectrum

✘Collection of all elctromagnetic radiations.

✘Wavelength Variation

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

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

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

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

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.

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

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

Effects of Atmosphere

Astronomical Seeing Scattering Absorption

Astronomical Seeing Refraction by atmosphere Blurring of Objects

Scattering

Image Source: Universe Today

Atmosphere scatters light reflected by celestial bodies. Changes original appearance of the body.

Absorbing

Source: http://csep10.phys.utk.edu/astr162/lect/light/windows.html

Figure: The amount of absorption at different wavelengths in the atmosphere

THANKS!

Any questions?Let’s have a Q/A session!