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Welcome to my page!
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I am an astronomer and an educator. I have been working in various aspects of observational astronomy and cosmology over the last 20 years. ​I am an Adjunct Faculty at the Centre for Space Studies, American Public University System, where I teach graduate and undergraduate astronomy courses. I am actively involved in the establishment of Bangladesh's first research Center for Astronomy, Space Science and Astrophysics (CASSA).
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My research is focused on supernova cosmology, cosmic distance scales, and transient astronomy. I have led an extensive study, in collaboration with the Carnegie Supernova Project (CSP), on the current expansion rate of the Universe using multiple distance calibrators. This study is available as an open access article from The Astrophysical Journal. Our team is also pursuing a campaign Precision Observation of Infant Supernova Explosions (POISE), where we are making photometric and spectroscopic follow-ups of Type Ia Supernovae starting closer from their occurrence. An uptodate list of our publications is here.
​Recently, I have been involved in a collaboration to solve the so called Hubble Tension. Our recent meeting What's under the H0od? Towards Consensus on the Local Value of the Hubble Constant was held at the International Space Science Institute, Switzerland. We plan to prepare our study by the end of July 2025.
Besides distance scales, I also study astrophysical systematics than may help improving our understanding about the nature of Dark Energy. One such avenue is a correlation between supernovae and their hosts. An extensive study on this from my doctoral study can be found here, and another similar study from CSP collaboration is here. An ADS link to my publications is here.
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I have pursued PhD in Supernova Cosmology at the Centre for Astrophysics and Supercomputing, Swinburne University of Technology, in Melbourne, Australia under supervision of Jeremy Mould and Chris Lidman. I wrote my dissertation on The Influence of Host Galaxies in Supernova Cosmology. During this time, I joined the Dark Energy Survey collaboration through OzDES and took part in transient follow-ups with the 4 meter Anglo-Australian Telescope.
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According to my astronomy genealogy, I am a descendent from some of the well known astronomers, such as, Henry Russell, Arthur Eddington, Lyman Spitzer, Jan Oort, and Maarten Schmidt among others. Prior to my doctoral study, I have completed an M.Sc. in Physics from University of Kentucky, and another M.Sc. in Advanced Techniques in Radio Astronomy and Space Science that was designed jointly by then Radio and Space Science department and Onsala Space Observatory of Chalmers University of Technology, Gothenburg, Sweden.
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Towards the end of my PhD, I was awarded a fellowship from the Chinese Academy of Science under the President's International Fellowship Initiative program. With this fellowship, I joined the Purple Mountain Observatory, Nanjing, China, primarily to work in an Antarctic Astronomy project. During my tenure there I was active in spectroscopic follow-ups of astronomical transients using the Wide Field Spectrograph of the 2.3m ANU telescope located at the Siding Spring observatory in Australia.
I was a Postdoctoral Research Associate at the Department of Physics and Astronomy at the Texas A&M University. Prior to that, a Postdoctoral Fellow at the Observatories of the Carnegie Institution for Science, located at Pasadena, California. I served as an Astronomer at the US Naval Observatory at level GS-13 federal employee. I also served as a Resident Astronomer for the Hobby-Eberly Telescope at the McDonald Observatory, Fort Davis, TX.
(More information is coming.)​
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