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portfolio
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publications
The birth and early evolution of a low-mass protostar
Published in Astronomy & Astrophysics, 2023
This paper presents the highest-resolution 3D RHD simulations of protostellar interiors to date, revealing their internal turbulent structure.
Recommended citation: Adnan Ali Ahmad, Mathias González, Patrick Hennebelle, Benoît Commerçon, A&A 680, A23 (2023)
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Formation of low-mass protostars and their circumstellar disks
Published in Astronomy & Astrophysics, 2024
This paper studies the birth of circumstellar disks at sub-AU scales using 3D RHD simulations with unprecedented detail.
Recommended citation: Adnan Ali Ahmad, Mathias González, Patrick Hennebelle, Benoît Commerçon, A&A, 687, A90 (2024)
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Formation and evolution of a protoplanetary disk: Combining observations, simulations, and cosmochemical constraints
Published in Astronomy & Astrophysics, 2024
This review incorporates cosmochemical constraints into a coherent model for the formation and evolution of the protosolar disk.
Recommended citation: Morbidelli et al., A&A, 691, A147 (2024)
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Birth of magnetized low-mass protostars and circumstellar disks
Published in Astronomy & Astrophysics, 2025
This paper studies the birth of a magnetized protostar and circumstellar disk at sub-AU scales using 3D non-ideal MHD simulations.
Recommended citation: Adnan Ali Ahmad, Mathias González, Patrick Hennebelle, Ugo Lebreuilly, Benoît Commerçon, A&A, 696, A238 (2025)
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Brown Dwarf Formation through Gravitational Collapse: Insights from 3D Numerical Simulations
Published in The Astrophysical Journal Letters, 2025
This letter presents the first 3D self-consistent simulations of brown dwarf born through isolated gravitational collapse.
Recommended citation: Adnan Ali Ahmad, Benoît Commerçon, Gilles Chabrier, and Antonin Borderies, ApJL 991 L32 (2025)
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Turn up the light: Radiative efficiency of protostars at birth
Published in Astronomy & Astrophysics, 2025
This letter provides a self-consistent measurement of the radiative efficiency of protostellar shock fronts.
Recommended citation: Asmita Bhandare, Adnan Ali Ahmad, Benoît Commerçon, A&A, 702, L7 (2025)
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talks
French Astronomical Society Meeting (SF2A)
Published:
Conference link. I presented my 3D RHD simulations of protostellar and circumstellar disk birth.
Thesis defense
Published:
Video recording of the PhD defense. I defended my thesis on star formation in front of Romain Teyssier, Rolf Kuiper, Corinne Charbonnel and Evelyne Alecian.
French Astronomical Society Meeting (SF2A)
Published:
Conference link. I presented my 3D non-ideal MHD simulations of protostellar and circumstellar disk birth.
Brown Dwarfs Keep Their Cool
Published:
Conference link. I presented my work on Brown Dwarf formation through gravitational collapse.
Seminar at Collège de France
Published:
Video recording of the seminar. Invited by A. Morbidelli, I presented a seminar on star formation, focusing on gas dynamics within the innermost sub-AU region. My talk presented the mechanisms involved in transporting high-temperature condensates in the early Solar System.
teaching
University teaching assistant (128h)
Undergraduate course, Universtié Paris Cité, 2022
Python programming, signal processing, and fluid mechanics experiments (2022 & 2023).