Halim Ashkar
Also known as: Halim El Achkar
Institute of Space Sciences, Laboratoire Leprince-Ringuet, Université Paris-Saclay, Université Paris Sciences et Lettres, Notre Dame University – Louaize
Research areas: Physics and Astronomy · Astronomy and Astrophysics · Astrophysics and Cosmic Phenomena · Gamma-ray bursts and supernovae · Astrophysical Phenomena and Observations
0000-0002-2153-1818
About
I hold a Ph.D. in Astroparticle Physics and Cosmology from Paris-Saclay University. As an early-career scientist with three years of postdoctoral experience, I specialize in multi-wavelength and multi-messenger observations of transient astrophysical sources. My research focuses on deciphering the physical processes within compact astrophysical objects that rapidly accelerate particles to high energies. I also contribute to the technical and developmental aspects of time domain and high-energy astrophysics.
Furthermore, I am a self-published author, with my book "Space 101, Astronomy in Simple Words" available worldwide.
Employment
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Institute of Space Sciences Research Fellow2025 - Present
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Leprince-Ringuet Laboratory Postdoc2021 - 2025
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Commissariat a l'energie atomique et aux energies alternatives Centre de Saclay PhD Researcher2018 - 2021
Education
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University of Paris-Saclay Ph.D. in Astroparticle Physics and Cosmology2018 - 2021
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Université Paris Sciences et Lettres Master's in Astrophysics2016 - 2018
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Notre Dame University – Louaize BE in Mechanical Engineering & minor in Physics2011 - 2016
Projects & Funding
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ACME - Astrophysics Centre for Multi-messenger studies in Europe EU2024 - Present
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Multi-messeger Astrophysics École Polytechnique2023 - 2024
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MOTS - Multi-messenger Observations of the Transient Sky Agence Nationale de la Recherche2021 - 2026
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Beatiru de Pinós AGAUR
Publications (241)
- Evidence of a spectral steepening of the gamma-ray emission from the Galactic center ridge Save
- Scrutinizing the 2020 multiwavelength outburst of PKS 0903 - 57 through observations with H.E.S.S․ Save
- H.E.S.S. observations of composite Seyfert–starburst galaxies Save
- H.E.S.S. detection of the PSR J0855−4644 nebula Save
- The second H.E.S.S. gamma-ray burst catalogue: 15 years of observations with the H.E.S.S. telescopes Save
- Constraining the nature of the most extreme Galactic particle accelerator Save
- A MeerKAT search for persistent radio sources towards twenty-five localised Fast Radio Bursts Save
- A MeerKAT search for persistent radio sources towards twenty-five localized fast radio bursts Save
- tilepy: A Flexible Open-Source Scheduling Engine for Time-Domain and Multi-Messenger Astronomy Save
- The H.E.S.S. extragalactic sky survey with the first decade of observations Save
- Constraining the nature of the most extreme Galactic particle accelerator. H.E.S.S. observations of the microquasar V4641 Sgr Save
- Detection of very high-energy gamma-ray emission from Eta Carinae during its 2020 periastron passage Save
- Detection of very-high-energy gamma-ray emission from Eta Carinae during its 2020 periastron passage Save
- H.E.S.S. programme searching for VHE gamma rays associated with FRBs Save
- H.E.S.S. programme searching for VHE gamma rays associated with FRBs Save
- Investigating Fast Radio Bursts with H.E.S.S.: Multi-Wavelength Follow-Up and Constraints on Gamma-Ray Emission Save
- Prompt Searches for Very-High-Energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts Save
- Revisiting Two Decades of GRB Observations: Assessing Missed Very High-Energy Detections and Future Prospects Save
- Revisiting Two Decades of GRB Observations: Assessing Missed Very High-Energy Detections and Future Prospects Save
- The H.E.S.S. Gravitational Wave and Gamma-Ray Burst Follow-Up Programs Save