This is my old site (outdated long back). Please visit here for my current site.

Hello and Namaste !!!! I am a crazy guy with a deep love to study the universe. Currently, I am a final year integrated BS-MS student at IISER Kolkata, majoring in Physics. I am doing my Master's thesis at Indian Institute of Science (IISc.) Bangalore under the supervision of Prof. Banibrata Mukhopadhyay.

I intend to continue my research in the field of compact objects, exoplanets, gravitational waves, and galaxy evolution.

CV is available on request. (sb19ms136@iiserkol.ac.in, surendra.bhattarai.physics@gmail.com)

Things I Can Do

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  • Write all the code
  • Stack small boxes
  • Read books and stuff
  • Drink much coffee
  • Lightning bolt
  • Shadow clone technique

Projects

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Summer intern (2022) at IUCAA.

Inter-University Centre for Astronomy and Astrophysics (IUCAA) Pune, India
July, 2022 - Present

Comparison between Eccentric GW signals & micro-lensed GW signals.

  • In this project, I got an exposure to work with PyCBC, which is a software package used to explore astrophysical sources of gravitational waves.
  • I studied about micro-lensing, which is basically frequency-dependent modulations in the Gravitational Wave (GW) signal caused by substructures in the form of stars and stellar remnants of the lensing galaxy.
  • Worked with TaylorF2Ecc waveform, which is a TaylorF2 post-Newtonian (PN) waveform model with eccentric corrections that incorporates the effects of eccentricity only in the phase and not in the amplitude.
  • Obtained a parameter space (y vs. Mlens) where the match between the eccentric and the micro-lensed waveform was significant.
  • Presentation link

    IAstro Summer Internship (2022) at Instituto de Astrofísica e Ciências do Espaço (IA).

    Porto, Portugal
    July, 2022

    Passive, but not resigned.

  • This was a remote internship where we studied about blue star forming galaxies and red passive galaxies where the star formation is quite low or even absent, and a new type of galaxies migrating from the blue star-forming cloud to the red passive zone.
  • The goal of this project was to compare the outcome from different selection methods applied to a very well-known field, COSMOS.
  • From the observations, we understood that finding a better selection method for identifying passive galaxies is important to make use of telescope time effectively.
  • Detecting exoplanets using Statistical Tools.

    Apr 2022 - Present
    This was a remote internship where we studied about blue star forming galaxies and red passive galaxies where the star formation is quite low or even absent, and a new type of galaxies migrating from the blue star-forming cloud to the red passive zone.

    Radio Astronomy Winter School 2021.

    Dec, 2021 - Jan, 2022
    In this winter school, organised by NCRA-IUCAA, we analysed the effect of radio waves from WiFi signal in different experiments. We were also provided with data from Ooty radio telescope (ORT), where we detected pulse profile of the Vela pulsar. We also detected radio frequency interference (RFI) in GMRT data, and determined HI line parameters.
    Report and presentation can be found here.

    Classical Mechanics Semester Projects.

    Aug - Dec, 2021
  • Project 1: Mathematical analysis of motion of a bead in a hoop and a charge moving in a static magnetic field. Report
  • Project 2: Dynamics of a rocket in a uniform gravitational field. Report
  • International Asteroid Search Campaign.

    June - July, 2021
    My team, consisting of me and 3 other members, discovered 1 main belt asteroid: 2021 LH10, by working as a Citizen Scientist in the International Asteroid Search Campaign organized jointly by the International Astronomical Search Collaboration (IASC), Hardin-Simmons University and NASA, where we used the data collected from Pan-STARRS and analyzed it using a software "Astrometrica".
    More information can be found here.

    Effect of AGN Accretion Discs on regulation of Star Formation.

    Feb - Mar, 2021
    Mentor: Sundar MN
    Organised by SSERD (Society for Space Education Research and Development).

    I examined AGN feedback mechanisms, studied various physical and characteristics that promote/inhibit star formation in galaxies such as viscosity, opacity, luminosity, magnetohydrodynamics, mass, pressure, fragmentation etc. and also worked on the far-infrared luminosity and the X-ray luminosity of AGNs via a semi-analytical model to investigate the trends of star formation against AGN accretion activity.
    Report can be found here.

    Publications

    VaTEST I: Validation of Sub-Saturn Exoplanet TOI-181b in Narrow Orbit from its Host Star.

    Preprint: https://doi.org/10.48550/arXiv.2211.07957

    We have recently submitted this manuscript in MNRAS which is currently under 2nd review. This was an independent project undertaken by 5 students including me, where we detect exoplanets using statistical tools like VESPA, triceratops, lightkurve, etc.

    Scholastic Acievements


    • INSPIRE scholar
    • All Assam Rank 18 in class 12.
    • Anundoram Borooah Award.
    • All Assam Rank 15 in class 10.

    Contact Me

    Feel free to contact me.

    sb19ms136@iiserkol.ac.in
    sachinbhattarai54321@gmail.com