1 / 22

High Energy Astrophysics in India : ASTROSAT and Future

High Energy Astrophysics in India : ASTROSAT and Future. X-ray Astronomy in India. PRESENT. BALLOON. IXAE. PAST. ROCKET. FUTURE. Black hole studies with IXAE. Rapid X-ray variability and quasi periodic oscillations. Possible evidence of black event horizon. Superluminal motion

diza
Download Presentation

High Energy Astrophysics in India : ASTROSAT and Future

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High Energy AstrophysicsinIndia :ASTROSAT and Future

  2. X-ray Astronomy in India PRESENT BALLOON IXAE PAST ROCKET FUTURE

  3. Black hole studies with IXAE Rapid X-ray variability and quasi periodic oscillations Possible evidence of black event horizon Superluminal motion in the Galactic microquasar GRS 1915+105 Rapid changes in the state of the black hole accretion disk Association between radio flare and X-ray activity

  4. Pulsar studies with the Indian X-ray Astronomy Experiment (IXAE) Energy dependence of the Crab pulsar profile Profile change in transient X-ray pulsar change in accretion mode!! Quasi periodic oscillations in X-ray Pulsar, a rare phenomenon Pulse period and profile evolution in transient X-ray Pulsars

  5. ASTROSAT (2005/2006)Indian Multi-wavelength Astronomy Satellite • Broad band X-ray spectroscopy • Black holes, Pulsars, AGNs etc • Isolating thermal and nonthermal • components, cyclotron lines etc. • X-ray Timing • Pulsars, Black holes, AGNs etc. • Periodic, quasiperiodic and aperiodic variabilities • Ultraviolet Imaging Telescope • Soft X-ray Telescope • X-ray Sky Monitor • Cadmium Zinc Telluride Array • Array of Large Area X-ray • Proportional Counters

  6. LAXPC LAXPC: Large-Area Xenon Proportional Counter

  7. High Energy Imager : CZTI: Cd-Zn-Te Imager

  8. Soft X-ray Telescope

  9. Scanning Sky Monitor SSM: Sky Survey Monitor

  10. LAXPC Sensitivity • Very Large Area (6,000 –7,500 cm2) • High Detection Efficiency • High Time Resolution • Good Energy Resolution • X-ray Polarisation

  11. Cyclotron Absorptionin Neutron Star

  12. Galactic Point Sources Accreting Millisecond Pulsar(s) • TransientSources

  13. Nonthermal Emission inClusters of GalaxiesMagnetic Field and Energy Density

  14. Black Hole Studies with the ASTROSAT • Galactic Point Sources • Active Galactic Nuclei

  15. Galactic BHCs • PersistentSources Black Hole Candidates (broad band spectroscopy)

  16. Transient Sources Aperiodic variabilities, high and low freq QPOs

  17. Galactic Point Sources Relation between spectral and temporal variations

  18. B The Elephand and the Ant

  19. Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs) • Continuum Spectra • (quasi) Periodic and Aperiodic Variabilities • Emission Line Variabilities

  20. Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs) • Broad band continuum spectra Order of magnitude improvement in sensitivity at hard X-rays with ASTROSAT

  21. Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs) • (quasi) Periodic Variabilities

  22. Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs) • andAperiodic Variabilities

More Related