Islam Khan

Islam Khan
Washington State University | WSU · Department of Physics and Astronomy

Doctor of Philosophy

About

4
Publications
74
Reads
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8
Citations
Introduction
I am currently in a Ph.D. candidate in Physics at Washington State University. My research interests are in the fields of early universe cosmology and astroparticle physics. I am currently working on a research project which is based on investigating inflation models that can provide a source for dark energy density. I have experience studying string theory motivated inflation models and using lattice simulations to make various cosmological predictions.

Publications

Publications (4)
Preprint
Full-text available
We investigate reheating in the string-theory-motivated Kähler Moduli Inflation I (KMII) potential, coupled to a light scalar field and produce constraints and forecasts based on Cosmic Microwave Background (CMB) and gravitational wave observables. We implement a Markov Chain Monte Carlo (MCMC) sampling method to compute the adopted model's paramet...
Preprint
Full-text available
In this talk, I discuss the effects, viability, and predictions of the string-theory-motivated K\"ahler Moduli Inflation I (KMII) potential, coupled to a light scalar field $\chi$, which can provide a possible source for today's dark energy density due to the potential's non-vanishing minimum. Although the model is consistent with the current measu...
Article
Context. Libraries of stellar spectra find many uses in astrophysics, from photometric calibration to stellar population synthesis. Aims. We present low resolution spectra of 40 stars from 0.2 μ m (ultraviolet) to 1.0 μ m (near infrared) with excellent fluxing. The stars include normal O-type stars, helium-burning stars, and post-asymptotic giant b...
Article
Solid oxide fuel cells (SOFCs) are devices that directly convert chemical into electrical energy through oxidation of a fuel. Currently, there is intense interest in developing new kinds of SOFCs that can reduce the typical 800 °C to 1000 °C operating temperature of existing cells to the more manageable 400 °C to 600 °C range, which can be achieved...

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Projects

Projects (2)
Project
I am currently pursuing project on modeling of scattered light in STIS grating G230LB on board of Hubble Space Telescope (HST) and applying the corrections to all the spectra of Next Generation Spectral Library (NGSL). This will correct for unwanted UV flux in low wavelength regime of the spectra (1600Å to 3000Å. Also correlation between equivalent width of Mg doublet and chromosphere activity will be investigated.
Project
Inflation theory has been one of the most important paradigms in modern cosmology, while investigating dark energy's nature remains one of its main challenges. The main idea behind this project is to study the viability, effects, and predictions of inflation models that have a small non-zero minima to provide a source for the cosmological constant's energy density. Our study used MCMC sampling analysis to estimate the inflation model parameter ranges, and bounds on the inflaton mass and reheating temperature. We use numerical lattice simulations to compute the GW spectra sourced during the reheating epoch. We investigate inflation models with a variety of interactions, particularly quadratic and trilinear. Our analysis makes predictions of the reheating temperatures, gravitational wave spectra, abundances of primordial black holes and microhalos, etc.