Research interests
I am highly motivated to work on various problems in cosmology, neutrinos, axions, dark matter phenomenology, and astroparticle physics and explore other domains. Having research experience with my previous projects, I am currently seeking a PhD position to actively conduct research, collaborate and learn along the way. I look forward to understanding how different topics are connected and working on various problems.
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Active Collaborations: GNOME, APSERa
MeV Neutrinos from DM capture in the Sun
Working with Prof. Ranjan Laha (CHEP, IISc Bangalore)
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Working on my Master's thesis project with Prof. Ranjan Laha. We are working on solar DM capture and various interactions that would lead to MeV neutrino flux. We particularly consider leptophilic DM candidates. We look forward to constraining WIMP Dark Matter coupling parameter space
Reference image: Symmetry Magazine
APSERa - Statistical constraints on instrument systematics
Working with Prof. Mayuri S. Rao (RRI, Bangalore)
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APSERa is an upcoming ground-based experiment to detect cosmological recombination ripples in the 2-6 GHz range. The expected signal is shown in the image. I worked on the complete simulation pipeline. The simulation included modelling the sky in that frequency, antenna parameters, recovering the signal and analysing it.
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The instrument and the antenna systematics can distort the signal, reducing our confidence in detection. Sometimes, it can completely mask the signal. Understanding how various systematics influence signal detection is studied. We expect to publish the work soon.
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Manuscript submitted for Publication
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Dhashin Krishna, Mayuri S. Rao
Journal of Astrophysics and Astronomy
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Recombination signal template
Source: CosmoSpec (2015)
Axions from black hole superradiance -
Detection by GNOME
Working with Prof. Dmitry Budker (JGU, Mainz and UC Berkeley)
GNOME - Global Network of Optical Magnetometers for Exotic Physics searches is a network to detect ultralight bosonic dark matter. Self-interaction of axion clouds formed around a black hole due to black hole superradiance can lead to emission of axions to infinity which can potentially be detected by direct detection experiments like GNOME. I am working on the simulation and data analysis and then looking forward to setting constraints in the axion (ALPs) parameter space.
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Active: GNOME Collaboration
Perturbing Shear Flow and Stability Analysis
Worked with Prof. Banibrata Mukhopadhyay (IISc, Bangalore)
This project is related to the origin of linear instability and perturbation analysis in the accretion disc of a compact object. Without the assumption of incompressible flow in the Keplerian disc region, the background equilibrium solutions for the flow are established. Different velocity profiles are checked to see if they are consistent with the standard fluid mechanics. Now, the flow variables are linearly perturbed and checked for stability
