Tanmay Singh

Fourth Year Ph.D. Candidate | Astrophysics

Hi! I am Tanmay, currently a PhD student in the School of Earth and Space Exploration at Arizona State University, advised by Prof. Sanchayeeta Borthakur. My research interests lie broadly in galaxy formation and processes that impact their evolution.

Research Publications Download CV

tsingh65@asu.edu Google Scholar GitHub LinkedIn

Plate I T. Singh · ASU SESE · 2026

Background and current focus.

Prior to coming to ASU, I completed my B.Tech in Engineering Physics from the Indian Institute of Technology Delhi in July 2023. I also worked as a visiting student at the Raman Research Institute in Bangalore from May to July 2022. I was born and brought up in Lucknow, India.

My current research uses cosmological simulations and synthetic quasar absorption spectra to study gas associated with galaxies and galaxy groups. I also work on probabilistic spectral classification of AGN and supernovae using Bayesian logic. You can read more about the current projects in the research section, and about non-academic interests under Personal Interests.

Current role: Ph.D. Student in Astrophysics
Institution: Arizona State University
School: School of Earth and Space Exploration
Undergraduate: B.Tech, Engineering Physics, IIT Delhi

Ongoing research projects.

Investigating the IGM and CGM

The intergalactic medium and circumgalactic medium play crucial roles in the formation and evolution of galaxies. One primary research goal is to understand how Mg II absorbers observed in the spectra of background quasars are connected to galaxies.

By analyzing mock quasar absorption spectra generated from cosmological simulations such as IllustrisTNG and SIMBA, this work asks whether absorbers originate from outflowing material expelled by star-forming galaxies or from large rotating disks accreting material onto galaxies.

O VI in the Intra-group Medium

Compares O VI absorption in synthetic spectra from SIMBA and TNG50 galaxy groups against COS-IGrM observations. The analysis uses matched group samples and observation-like synthetic spectroscopy to study absorber distributions, kinematics, covering fractions, and galaxy associations.

Spectral Classification of AGN and Supernovae

Distinguishing between spectral signatures of Active Galactic Nuclei and Supernovae is essential for characterizing transient astrophysical events. This work uses Bayesian logic (BLOG) to develop automated methods for spectral classification.

Kinematics of the Outer Circumgalactic Medium

Investigating co-rotation and counter-rotation of outer CGM gas around L-star galaxies using sightline-based synthetic spectroscopy in TNG50-1.

Interactive

TNG50 Sightline Explorer

Mock quasar spectra (O VI, H I Lyβ, C III) through the CGM of a Milky-Way-mass TNG50-1 galaxy, degraded to any spectrograph resolution and S/N. Pick from 672 precomputed sightlines or request a new geometry, and a Trident ray is cast on demand.

Open explorer Detect & resolve explainer

Earlier research.

Past work spanning submillimeter astronomy, solar physics, quantum communication, image processing, and atomic collisions.

Preliminary site quality analysis for an Indian sub-millimeter telescope

Raman Research Institute

Evaluated prospective sites in the Ladakh region using global PWV and other datasets from NASA and ECMWF. The work used pandas, NumPy, SciPy, matplotlib, and QGIS for site-quality analysis.

Magnetic field topology and properties of solar coronal lines

Senior thesis

Cleaned and aligned images from the Total Solar Eclipse (2017), retrieved magnetic field lines using RHT and ACF, and compared the topology with Magneto-Hydrodynamics equations.

Post-processing and applications in quantum secure communication

SURA project

Developed optimized software for post-processing in entanglement-based Quantum Key Distribution, including reconciliation, cascade variants, privacy amplification, networking, and lab-data verification.

Identifying acoustic wave sources on the Sun

Solar data

Studied acoustic waves on the solar surface using simulated MURAM data and image-processing techniques such as azimuthal averaging with OpenCV, NumPy, and matplotlib.

Angular dependence of Fano profile in ultra-cold atomic collisions

Atomic collisions

Studied Fano profiles in cold atomic collisions such as H-Kr and analyzed how Fano parameters depend on scattering angle using Python and Code Ocean.

Publications and abstracts.

Selected entries from Google Scholar and the current CV.

Google Scholar

Analysis of synthetic OVI absorption associated with galaxy groups in SIMBA and TNG50 simulations

2026arXiv preprint arXiv:2604.18808

T Singh, S Borthakur, D Nelson, R Davé, T McCabe

Scholar arXiv

Site Quality Analysis for an Indian Submillimeter Telescope: A Reanalysis-Based Approach

2026arXiv preprint arXiv:2604.13487

T Singh, MS Rao, RB Thakur

Scholar arXiv

Scattering angle dependence of Fano resonance profiles in cold atomic collisions analyzed with the complex valued w parameter: T Singh et al.

2026Indian Journal of Physics

T Singh, RA Singh, F Koike, M Iizawa, Y Azuma

Scholar arXiv

Analysis of synthetic O VI absorption in galaxy groups of SIMBA and IllustrisTNG simulations

2026American Astronomical Society Meeting Abstracts 247, 174.05

T Singh, S Borthakur, D Nelson, T McCabe

Scholar

Education

Aug 2023 - Present

Ph.D. in Astrophysics

Arizona State University | School of Earth and Space Exploration

Current graduate research includes O VI in the intra-group medium, spectral classification of AGN and supernovae, and kinematics of the outer circumgalactic medium.

May 2022 - July 2022

Visiting Research Intern

Raman Research Institute | Astronomy and Astrophysics Department

Worked on preliminary site-quality analysis for an Indian sub-millimeter telescope.

July 2019 - July 2023

B.Tech. in Engineering Physics

Indian Institute of Technology Delhi

Undergraduate training in engineering physics, with research spanning solar physics, quantum secure communication, atomic collisions, and submillimeter astronomy.

AST 112 Lab

Course: AST 112 Lab, Lab Lead (3 Sections)

Institution: Arizona State University | Department: School of Earth and Space Exploration (SESE)

Semester: Spring 2024

This lab course focused on the practical aspects of introductory astronomy, where students conducted hands-on experiments and observations to reinforce the concepts learned in lectures.

Personal Interests

Chess Books Geography Music Astrophotography

Outside of my academic life, I have a diverse range of interests that keep me engaged and inspired. One of my favorite pastimes is playing chess. I would be happy to connect if you also play on chess.com; my username is Voyager972. Reading books is another passion of mine, particularly pop-science and non-fiction.

I have a keen interest in geopolitics and geography. Music and singing also play a significant role in my life; I particularly enjoy ghazals, Sufi music, and old Hindi songs.

I am also interested in astrophotography and aspire to capture the beauty of the night sky. Although I have not had the chance to pursue it as actively as I would like, it remains a goal I look forward to developing in the future.

Thank you for visiting my page. Feel free to reach out if you share similar interests or just want to connect.

Get in touch.

Tanmay Singh

Astrophysics PhD Student at Arizona State University, Tempe, AZ.

Emailtsingh65@asu.edu Google ScholarSfeb8fMAAAAJ GitHubtanmay-starslab LinkedIntanmay-singh-21574a1aa