Niranjan Chandra Roy

Graduate Student

Physics

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Niranjan is a fourth-year grad at UConn Physics, working with Prof. Daniel Anglés-Alcázar on creating mock observations of galaxies from cosmological zoom-in and hyper-refinement FIRE (Feedback In Realistic Environments) simulations. Such mock observations in both line and continuum emissions are to be used as comparable templates for state-of-the-art telescopes, e.g., James Webb Space Telescope, Hubble Space Telescope, Atacama Large Millimeter Array; and will help to constrain the physics behind galaxy evolution. 

Ongoing projects (including collaborations):

• Synthetic emission lines tracing multi-phase interstellar medium and outflows in cosmological FIRE simulations.
• Degeneracy in broad line region observables and implications for the identification of accreting supermassive black holes in JWST deep fields.
• Little Red Dots on FIRE: Identifying potential LRD candidates among massive FIRE simulations.
• Capturing multi-phase ISM properties of the host galaxy of a massive merger system.
• Synthetic Emission Lines Tracing Rotational Support in FIRE Galaxies Across Redshifts (Undergraduate project led by Grace Farrell)
• Comparison of denoising methods for spectral cube data using mock IFU cubes from FIRE simulations (Collaboration led by Arnab Lahiry and Dr. Tanio Diaz-Santos)
• Inferring physical conditions from emission line IFU data cubes of FIRE galaxies using machine learning models (Collaboration led by Arnab Lahiry and Dr. Tanio Diaz-Santos)

He has also worked on the progenitor problem of type IA supernovae under the supervision of Prof. Robert Fisher, by simulating these high-energy astrophysical events in multi-dimensions with GPU-accelerated nuclear networks.

He completed his master’s in Physics from the University of Massachusetts Dartmouth, his second master’s in Physics from the University of Connecticut, and his baccalaureate in EEE from the Bangladesh University of Engineering and Technology.

Recent publications:

• Vayner, A., Diaz-Santos, T., Eisenhardt, P. R. M., Stern, D., Armus, L., Angles-Alcazar, D., Assef, R.J., Fernandez Aranda, R., Blain, A. W., Jun, H.D., Tsai, C.W., Roy, N.C., Brisbin, D., Ferkinhoff, C.D., Aravena, M., Gonzalez-Lopez, J., Li, G., Liao, M., Shobhana, D., Wu, J., and Zewdie, D., “Powerful nuclear outflows and circumgalactic medium shocks driven by the most luminous quasar in the Universe”, Submitted to the Astrophysical Journal, December 2024,  https://arxiv.org/pdf/2412.02862
• Roy, N.C., Tiwari, V., Bobrick, A., Kosakowski, D., Fisher, R., Perets, H, B., Kashyap, R., Lorén-Aguilar, P., García-Berro, E, “3D Hydrodynamical Simulations of Helium-Ignited Double-degenerate White Dwarf Mergers”, The Astrophysical Journal Letters, 932:L24 (7pp), 2022 June 20, https://doi.org/10.3847/2041-8213/ac75e7

News:

• Roy et al 2022 featured in a Quanta article, “What Lights the Universe’s Standard Candles?“

 

Recent talks:

• New England FOLIAGE (FIRE mOdeLIng & Galaxy Evolution Workshop), UConn, November 2024.
• Cosmic Odysseys 2024, Agios Nikolaos, Greece; June 2024.
• JWST-W2246 collaboration meeting, FORTH, Greece; June 2024.
• STScI-JHU Joint Galaxy Journal Club, Space Telescope Science Institute, Baltimore; March 2024.
• Physics Seminar Series, University of Massachusetts Dartmouth; February 2024.