Research

I work on physics, astrophysics and data analysis aspects of gravitational waves. I also try to dabble in scientific computing now and then. My most updated CV can be found here.

If you have questions/comments about my work or the field in general, please do not hesitate to contact me at avijaykumar [at] uchicago [dot] edu.

The most updated list of my papers can be found on NASA ADS, arXiv. They are also pasted below. I have done a twitter thread accessible to non-experts for some of my released papers, linked below.

Short Authorlist Papers

• Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia, Sourav Chatterjee Identifying and characterizing extragalactic circum-CBC exoplanets with future gravitational-wave detectors arXiv, Astrobites Article.

• Avinash Tiwari, Shasvath J. Kapadia, Aditya Vijaykumar, Sourav Chatterjee Periodic line-of-sight velocity-driven modulations to gravitational waves emitted by compact binaries in Keplerian outer orbits arXiv.

• Aditya Vijaykumar, Reed Essick Semianalytic Sensitivity Estimates for Out-of-Bank Gravitational-Wave Signals arXiv.

• Maya Fishbach et al. (including Aditya Vijaykumar) Implications of Low Neutron Star Merger Rates for Gamma-Ray Bursts, r-process Production, and Galactic Double Neutron Stars arXiv, ApJL.

• Neha Sharma, Aditya Vijaykumar, Prayush Kumar Rapid inference of gravitational-wave signals in the time domain using a heterodyned likelihood arXiv, Phys. Rev. D.

• Aditya Vijaykumar, Amanda M. Farah, Maya Fishbach The maximum mass ratio of hierarchical binary black hole mergers may cause the q-χ_eff correlation arXiv, ApJL.

• Amanda M. Farah, Aditya Vijaykumar, Maya Fishbach The steep redshift evolution of the hierarchical binary black hole merger rate may cause the z-χ_eff correlation arXiv, ApJL.

• N.V. Krishnendu, Tamara Evstafyeva, Aditya Vijaykumar, William E. East, et al. Implications of GW241011 for rotating exotic compact objects arXiv, Phys. Rev. Lett..

• Madison VanWyngarden, Maya Fishbach, Aditya Vijaykumar, Alexandra G. Guerrero, Daniel E. Holz How Low Can You Go: Constraining the Effects of Catalog Incompleteness on Dark Siren Cosmology arXiv, ApJ.

• Hui Tong et al. (including Aditya Vijaykumar) Evidence of the pair instability gap in the distribution of black hole masses arXiv, Nature.

• Colm Talbot et al. (including Aditya Vijaykumar) Inference with finite time series II: the window strikes back arXiv, CQG.

• Avinash Tiwari, Prolay Chanda, Shasvath J. Kapadia, Susmita Adhikari, Aditya Vijaykumar, Basudeb Dasgupta Profiling Dark Matter Spikes with Gravitational Waves from Accelerated Binaries arXiv. Submitted to CQG.

• Andris Doroszmai, Isobel Romero-Shaw, Aditya Vijaykumar, Silvia Toonen, et al. Hierarchical Triples vs. Globular Clusters: Binary black hole merger eccentricity distributions compete and evolve with redshift arXiv, MNRAS.

• Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia, Shrobana Ghosh, Alex B. Nielsen A pipeline to search for signatures of line-of-sight acceleration in gravitational wave signals produced by compact binary coalescences arXiv, Phys. Rev. D.

• Kanchan Soni, Aditya Vijaykumar, Sanjit Mitra Assessing the potential of LIGO-India in resolving the Hubble Tension arXiv, CQG.

• Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia, Sourav Chatterjee, Giacomo Fragione Profiling stellar environments of gravitational wave sources arXiv, Phys. Rev. D.

• Alexandra G. Hanselman, Aditya Vijaykumar, Maya Fishbach, Daniel E. Holz
  Gravitational-wave dark siren cosmology systematics from galaxy weighting.
  arXiv, ApJ.

• Sreejith Nair, Aditya Vijaykumar, Sudipta Sarkar
  Bounds on the charge of the graviton using gravitational wave observations.
  arXiv, JCAP.

• Mukesh Kumar Singh, Shasvath J. Kapadia, Aditya Vijaykumar, Parameswaran Ajith
  Impact of higher harmonics of gravitational radiation on the population inference of binary black holes.
  arXiv, ApJ.

• Kruthi Krishna, Aditya Vijaykumar, Apratim Ganguly, et al
  Accelerated parameter estimation in Bilby with relative binning.
  arXiv.

• Aditya Vijaykumar, Maya Fishbach, Susmita Adhikari, Daniel E. Holz
  Inferring host galaxy properties of LIGO-Virgo-KAGRA’s black holes.
  arXiv, ApJ.

• Divyajyoti, N.V. Krishnendu, Muhammed Saleem, Marta Colleoni, Aditya Vijaykumar, K.G. Arun, Chandra Kant Mishra
  Effect of double spin-precession and higher harmonics on spin-induced quadrupole moment measurements.
  Phys. Rev. D, arXiv.

• Avinash Tiwari, Aditya Vijaykumar, Shasvath J. Kapadia, Giacomo Fragione, Sourav Chatterjee
  Accelerated binary black holes in globular clusters: forecasts and detectability in the era of space-based gravitational-wave detectors.
  arXiv, MNRAS.

• Aditya Vijaykumar, Avinash Tiwari, Shasvath J. Kapadia, K.G. Arun, Parameswaran Ajith
  Waltzing binaries: Probing line-of-sight acceleration of merging compact objects with gravitational waves.
  arXiv, ApJ, Astrobites Article.

• Adhrit Ravichandran, Aditya Vijaykumar, Shasvath J. Kapadia, Prayush Kumar
  Rapid Identification and Classification of Eccentric Gravitational Wave Inspirals with Machine Learning.
  arXiv. Submitted to PRD.

• Srashti Goyal, Aditya Vijaykumar, Jose María Ezquiaga, Miguel Zumalacárregui
  Probing lens-induced gravitational-wave birefringence as a test of general relativity.
  arXiv, Phys. Rev. D, Astrobites Article.

• Bikram Keshari Pradhan, Aditya Vijaykumar, Debarati Chatterjee
  Impact of updated Multipole Love and f-Love Universal Relations in context of Binary Neutron Stars.
  arXiv, Phys. Rev. D.

• Aditya Vijaykumar, Shasvath J. Kapadia, Parameswaran Ajith
  Can a binary neutron star merger in the vicinity of a supermassive black hole enable a detection of a post-merger gravitational wave signal?.
  arXiv, MNRAS.

• Aditya Vijaykumar, Ajit Kumar Mehta, Apratim Ganguly Detection and parameter estimation challenges of Type-II lensed binary black hole signals.
  arXiv, Phys. Rev. D.

• Sumit Kumar, Aditya Vijaykumar, Alexander H. Nitz
  Detecting Baryon Acoustic Oscillations with third generation gravitational wave observatories.
  arXiv, ApJ.

• M. Saleem et al. (including Aditya Vijaykumar)
  The Science Case for LIGO-India
  arXiv, Class. Quantum Grav., Twitter Thread.

• Aditya Vijaykumar, MV Saketh, Sumit Kumar, Parameswaran Ajith, Tirthankar Roy Choudhury
  Probing the large scale structure using gravitational-wave observations of binary black holes.
  Phys. Rev. D, arXiv, Twitter Thread, Astrobites Article.

• Aditya Vijaykumar, Shasvath J. Kapadia, Parameswaran Ajith
  Constraints on the time variation of the gravitational constant using gravitational wave observations of binary neutron stars.
  arXiv, Phys. Rev. Lett., Twitter Thread, phys.org Article.

Long Authorlist Papers with Direct and Substantial Contribution

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  GWTC-5.0: Population Properties of Merging Compact Binaries.
  arXiv.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  GWTC-5.0: Observations from the Second Part of the Fourth LIGO-Virgo-KAGRA Observing Run and Updates to the Gravitational-Wave Transient Catalog.
  arXiv.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  GW241011 and GW241110: Exploring Binary Formation and Fundamental Physics with Asymmetric, High-spin Black Hole Coalescences.
  arXiv, ApJL.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  Upper Limits on the Isotropic Gravitational-Wave Background from the first part of LIGO, Virgo, and KAGRA’s fourth Observing Run.
  arXiv, Phys. Rev. D.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar as Paper Writing Team Lead)
  GWTC-4.0: Population Properties of Merging Compact Binaries.
  arXiv, ApJL.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  GWTC-4.0: Updating the Gravitational-Wave Transient Catalog with Observations from the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run.
  arXiv, ApJL.

• Abac et al. (LIGO Scientific, Virgo, and KAGRA Collaborations, including Aditya Vijaykumar)
  GW231123: a Binary Black Hole Merger with Total Mass 190-265 M_⊙.
  arXiv, ApJL.

• Abbott et al. (LIGO Scientific and Virgo Collaborations, including Aditya Vijaykumar)
  Tests of General Relativity with GWTC-3.
  arXiv, Phys. Rev. D.

• Abbott et al. (LIGO Scientific and Virgo Collaborations, including Aditya Vijaykumar)
  GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run.
  arXiv, Phys. Rev. X..

• Abbott et al. (LIGO Scientific and Virgo Collaborations, including Aditya Vijaykumar)
  Tests of General Relativity with Binary Black Holes from the second LIGO-Virgo Gravitational-Wave Transient Catalog.
  arXiv, Phys. Rev. D..

Other Papers

• P. Virtanen et al. (including Aditya Vijaykumar as SciPy 1.0 Contributor)
  SciPy 1.0–Fundamental Algorithms for Scientific Computing in Python.
  arXiv, Nat. Methods.