multiwavelength astronomy
TRANSCRIPT
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!