Issue #6
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Chromospheric heating by acoustic shock waves
Harsh Mathur The chromosphere is the most dynamic layer of the solar atmosphere, located between the bright solar surface and the million-degree hot corona. It is the region above the photosphere where the plasma is not in radiative equilibrium, and hydrogen is predominantly neutral, resulting in the characteristic Hα spectral line. The non-thermal energy that…
Miles to Go to the Edge of the Cosmos
Professor Varun Sahni speaks about his exciting career, childhood days, PhD life in Moscow, and his views on the future of cosmology About the IntervieweeProfessor Varun Sahni is an Indian theoretical physicist, astrophysicist, and distinguished professor at the Inter-University Centre for Astronomy and Astrophysics (IUCAA), Pune. Known for his research in cosmology, Professor Sahni has…
First Light with UVIT Payload on ASTROSAT
Amit Kumar I would like to share the heart holding experience of my first Space Project, UVIT on ASTROSAT. It was 30th November 2015. We had finished all the major checks on UVIT payload when its doors were closed. Just to remind the readers, ASTROSAT was launched on 29th September 2015 from ISRO space centre…
Testing Theoretical Bar Formation Criterion
Sandeep Kataria Bars are ubiquitous features in the disk galaxies. Observations show that around 2/3 of the disk galaxies in the observable universe (optical and infrared) have a bar in their central region. Bars are thought to be formed as a result of global instability in the disk, which traps eccentric orbits of the stars…
“Errors are beautiful and Gaussian”-Really?
Soumya Sengupta Gaussian or Normal Distribution is the most common of all the probability distributions in the sense that the heights of the boys in a classroom, the errors in any experiments, or the probability of acceptance of your proposal (in your company or in love affairs) all follow the Gaussian distribution. De Moivre first reported…