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Draft:Hagai Perets

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  • Comment: There has been no serious attempt to rewrite the page. In addition to the LLM, it contains a vast amount of promo material which we do not want. If it is submitted yet again without a major rewrite I recommend a permanent rejection. Ldm1954 (talk) 04:18, 12 July 2026 (UTC)
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Hagai Perets
חגי פרץ
Born (1977-04-22) 22 April 1977 (age 49)
Yodfat, Israel
Alma materWeizmann Institute of Science
Known forResearch on star and planet formation, stellar dynamics, and the Galactic center
Scientific career
FieldsAstrophysics, Astronomy
InstitutionsTechnion – Israel Institute of Technology
Hagai B. Perets
חגי פרץ
Alma materOpen University of Israel (BA); Hebrew University of Jerusalem (MSc); Weizmann Institute of Science (PhD)
Known forCalcium-rich supernovae; Type Iax partial-deflagration models; analytic/statistical treatment of chaotic three-body encounters; AGN-disc channel for gravitational-wave mergers; multiple-impact Moon hypothesis; quantum walks in waveguide lattices
Scientific career
FieldsAstrophysics; Planetary science
InstitutionsTechnion – Israel Institute of Technology
Websitehagaiperets.wixsite.com/perets-group

Hagai Binyamin Perets (Hebrew: חגי פרץ) is an Israeli theoretical astrophysicist and professor of physics at the Technion - Israel Institute of Technology. His research includes stellar and planetary dynamics, thermonuclear supernovae, gravitational-wave source channels, and statistical approaches to chaotic few-body dynamics. He is a recipient of a European Research Council Consolidator Grant (SNeX) and is listed as a Rothschild Fellow. Since 2023 he has served as chair of the Technion Faculty Association, and he is a member of several ULTRASAT science working groups.[1][2][3][4]

Education and career

[edit]

Perets earned a BA in mathematics and science at the Open University of Israel, an MSc in physics at the Hebrew University of Jerusalem, and a PhD in physics at the Weizmann Institute of Science (2009). After prize-fellow postdoctoral appointments at the Harvard-Smithsonian Center for Astrophysics (2009–2012), he joined the Technion faculty in 2012, where he is a professor in the Department of Physics.[5]

In 2019 he was awarded an ERC Consolidator Grant (SNeX: The origins of thermonuclear supernova explosions).[6] He is listed as a Rothschild Fellow by Yad Hanadiv.[7]

Since 2023, Perets has served as chair of the Technion Faculty Association.[8] He is listed among the science working groups of the ULTRASAT mission.[9]

Research

[edit]

Thermonuclear supernovae

[edit]

Perets led the discovery and characterization of a class of faint, fast thermonuclear transients with strong calcium features (calcium-rich supernovae), reporting SN 2005E and its properties in Nature (2010).[10] Subsequent work from his group provided a physical progenitor framework: Zenati, Perets and Dessart (2023) showed that disruptions of low-mass carbon-oxygen white dwarfs by hybrid helium-carbon-oxygen white dwarfs during mergers, reproduce the luminosities and nebular calcium dominance of Ca-rich events.[11]

He co-authored early models for Type Iax supernovae as partial-deflagration (failed-detonation) explosions of near-Chandrasekhar carbon-oxygen white dwarfs, predicting bound remnants and low-velocity ejecta.[12]

Technion-led work including Perets and collaborators has connected hypervelocity white dwarfs to double-detonation outcomes; these results were covered by Technion and science-news outlets in 2025.[13][14]

Gravitational-wave source channels

[edit]

Perets co-authored the proposal that compact objects embedded in active galactic nucleus (AGN) accretion discs can migrate, interact and merge efficiently - producing gravitational-wave sources and fostering intermediate-mass black-hole growth.[15] Related work predicted mergers from compact binaries perturbed by massive black holes in galactic nuclei.[16] His group has also developed gas-assisted binary capture and hardening in gas-rich environments.[17]

Perets and co-authors derived a one-point (non-Gaussian) probability-distribution framework for the astrophysical stochastic gravitational-wave background.[18]

Three-body dynamics and triple evolution

[edit]

Perets and his student Ginat presented an analytical, statistical description of outcome distributions in chaotic binary-single stellar encounters (dissipative and non-dissipative), published in Physical Review X.[19] Earlier, Perets and Kratter introduced the Triple-Evolution Dynamical Instability (TEDI), showing that mass-loss-driven destabilization in evolving triples can produce high collision rates and exotic binaries in the field.[20]

Planet formation and Solar-System dynamics

[edit]

Perets’ research spans a wide range of problems in planetary formation and dynamics, with a particular focus on the early evolution of planetary systems. Working with E. Rufu and O. Aharonson, he put forward an alternative view of the Moon's origin, suggesting it assembled from a succession of smaller “moonlets” produced by multiple large impacts, rather than a single event.[21] In collaboration with A. Mastrobuono-Battisti and S. Raymond, he further demonstrated that the striking compositional similarity between Earth and the Moon can emerge naturally from the statistics of late-stage planetary accretion.[22] His group has also contributed to broader questions in planetary dynamics, including how free-floating (“rogue”) planets may be captured within stellar clusters.[23]

Galactic-Centre dynamics

[edit]

During his PhD studies, in the group of T. Alexander, he quantified how massive perturbers (e.g. giant molecular clouds and clusters) refill the loss cone of the Galactic Centre massive black hole, enhancing captures, tidal disruptions and binary separation/ejection near Sgr A*.[24]

Quantum and optical physics

[edit]

Beyond astrophysics, Perets has studied several fields of physics. Specifically, Perets co-authored an experimental realization of quantum walks in photonic waveguide lattices, enabling large-scale, low-decoherence experiments that bridged the quantum-information and waveguide-lattice communities.[25]

Media and outreach

[edit]

Perets’ research has been covered by general-audience and science-news outlets, including:

  • BBC News on lunar-origin work and open questions regarding the Moon's formation.[26]
  • ScienceDaily coverage of the multiple-impact origin for the Moon.[27]
  • Phys.org on capture of rogue planets in clusters.[28]
  • Technion and Phys.org coverage of hypervelocity white dwarfs linked to double-detonation outcomes.[29][30]

Literary career

[edit]

Perets is a published poet and short-story writer. His poems have appeared in venues such as Gluya (גלויה) and BARD - Israel Association of Writers in English; a 2022 collection (הָרוּחַ מְשַׂחֶקֶת עַכְשָׁו, “The Wind Is Playing Now”) is listed by Hebrew literary outlets.[31][32][33] He received an honorary mention (Accésit) for Hebrew in the VII International Micro-Story Contest of the César Egido Serrano Foundation (Museum of the Word).[34]

Awards and honors

[edit]
  • European Research Council Consolidator Grant, SNeX (2019).[35]
  • Rothschild Fellowship (listed in Yad Hanadiv roll).[36]
  • The Cooper Award for Excellence in Research (Technion, 2021).[37]
  • Dan David Prize - graduate scholars program (listed among scholars).[38]

Selected publications

[edit]
  • H. B. Perets et al., “A faint type of supernova from a white dwarf with a helium-rich companion,” Nature 465 (2010) 322–325.[39]
  • G. C. Jordan IV; H. B. Perets; R. T. Fisher; D. R. van Rossum, “Failed-Detonation Supernovae: Sub-Luminous Low-Velocity Ia Supernovae and Their Kicked Remnant White Dwarfs with Iron-Rich Cores,” The Astrophysical Journal Letters 761 (2012) L23.[40]
  • Y. Zenati; H. B. Perets; L. Dessart, “The Origins of Calcium-rich Supernovae From Disruptions of Carbon-oxygen White Dwarfs by Hybrid Helium-carbon-oxygen White Dwarfs,” The Astrophysical Journal 944 (2023) 22.[41]
  • B. McKernan; K. E. S. Ford; W. Lyra; H. B. Perets, “Intermediate mass black holes in AGN discs,” Monthly Notices of the Royal Astronomical Society 425 (2012) 460–469.[42]
  • F. Antonini; H. B. Perets, “Secular Evolution of Compact Binaries near Massive Black Holes: Gravitational Wave Sources and Other Exotica,” The Astrophysical Journal 757 (2012) 27.[43]
  • Y. B. Ginat; H. B. Perets, “Analytical, Statistical Approximate Solution of Dissipative and Nondissipative Binary-Single Stellar Encounters,” Physical Review X 11 (2021) 031020.[44]
  • Y. B. Ginat; V. Desjacques; R. Reischke; H. B. Perets, “The Probability Distribution of Astrophysical Gravitational-Wave Background Fluctuations,” Physical Review D 102 (2020) 083501.[45]
  • E. Rufu; O. Aharonson; H. B. Perets, “A multiple-impact origin for the Moon,” Nature Geoscience 10 (2017) 89–94.[46]
  • M. Mastrobuono-Battisti; H. B. Perets; S. N. Raymond, “A primordial origin for the compositional similarity between the Earth and the Moon,” Nature 520 (2015) 212–215.[47]
  • H. B. Perets et al., “Realization of Quantum Walks with Negligible Decoherence in Waveguide Lattices,” Physical Review Letters 100 (2008) 170506.[48]

See also

[edit]

References

[edit]
  1. ↑ "ERC Consolidator Grants 2019: List of Principal Investigators" (PDF). European Research Council. 1 April 2020. Retrieved 6 October 2025.
  2. ↑ "Rothschild Fellows 1979–2023" (PDF) (in Hebrew). Yad Hanadiv. Retrieved 6 October 2025.
  3. ↑ "הודעות ועדכונים – אגודת הסגל האקדמי בטכניון" (in Hebrew). Technion Faculty Association. Retrieved 6 October 2025.
  4. ↑ "ULTRASAT Working Groups". Weizmann Institute of Science. Retrieved 6 October 2025.
  5. ↑ "Hagai Perets – Faculty profile". Technion Faculty of Physics. Retrieved 6 October 2025.
  6. ↑ "ERC Consolidator Grants 2019: List of Principal Investigators" (PDF). European Research Council. 1 April 2020. Retrieved 6 October 2025.
  7. ↑ "Rothschild Fellows 1979–2023" (PDF) (in Hebrew). Yad Hanadiv. Retrieved 6 October 2025.
  8. ↑ "הודעות ועדכונים – אגודת הסגל האקדמי בטכניון" (in Hebrew). Technion Faculty Association. Retrieved 6 October 2025.
  9. ↑ "ULTRASAT Working Groups". Weizmann Institute of Science. Retrieved 6 October 2025.
  10. ↑ Perets, H. B.; Gal-Yam, A.; Neill, J. D.; et al. (2010). "A faint type of supernova from a white dwarf with a helium-rich companion". Nature. 465 (7296): 322–325. arXiv:0906.2003. Bibcode:2010Natur.465..322P. doi:10.1038/nature09056. PMID 20485429.
  11. ↑ Zenati, Y.; Perets, H. B.; Dessart, L. (2023). "The Origins of Calcium-rich Supernovae From Disruptions of Carbon-oxygen White Dwarfs by Hybrid Helium–carbon-oxygen White Dwarfs". The Astrophysical Journal. 944 (1): 22. Bibcode:2023ApJ...944...22Z. doi:10.3847/1538-4357/acacc0 (inactive 20 July 2026).{{cite journal}}: CS1 maint: DOI inactive as of July 2026 (link)
  12. ↑ Jordan, G. C.; Perets, H. B.; Fisher, R. T.; van Rossum, D. R. (2012). "Failed-Detonation Supernovae: Sub-Luminous Low-Velocity Ia Supernovae and Their Kicked Remnant White Dwarfs with Iron-Rich Cores". The Astrophysical Journal Letters. 761 (2): L23. arXiv:1208.5069. Bibcode:2012ApJ...761L..23J. doi:10.1088/2041-8205/761/2/L23.
  13. ↑ "New study reveals origin of the fastest white dwarfs in the Galaxy". Technion. 31 August 2025. Retrieved 6 October 2025.
  14. ↑ "Fastest white dwarfs in the Galaxy linked to new class of stellar explosions". Phys.org. 2 September 2025. Retrieved 6 October 2025.
  15. ↑ McKernan, B.; Ford, K. E. S.; Lyra, W.; Perets, H. B. (2012). "Intermediate mass black holes in AGN discs". Monthly Notices of the Royal Astronomical Society. 425 (1): 460–469. doi:10.1111/j.1365-2966.2012.21560.x.
  16. ↑ Antonini, F.; Perets, H. B. (2012). "Secular Evolution of Compact Binaries near Massive Black Holes: Gravitational Wave Sources and Other Exotica". The Astrophysical Journal. 757 (1): 27. Bibcode:2012ApJ...757...27A. doi:10.1088/0004-637X/757/1/27.
  17. ↑ Rozner, M.; Generozov, A.; Perets, H. B. (2023). "Binary formation through gas-assisted capture and its implications". Monthly Notices of the Royal Astronomical Society. 521: 866–880. doi:10.1093/mnras/stad465.
  18. ↑ Ginat, Y. B.; Desjacques, V.; Reischke, R.; Perets, H. B. (2020). "The Probability Distribution of Astrophysical Gravitational-Wave Background Fluctuations". Physical Review D. 102 (8) 083501. arXiv:1910.04587. Bibcode:2020PhRvD.102h3501G. doi:10.1103/PhysRevD.102.083501.
  19. ↑ Ginat, Y. B.; Perets, H. B. (2021). "Analytical, Statistical Approximate Solution of Dissipative and Nondissipative Binary–Single Stellar Encounters". Physical Review X. 11 (3) 031020. arXiv:2011.00010. Bibcode:2021PhRvX..11c1020G. doi:10.1103/PhysRevX.11.031020.
  20. ↑ Perets, H. B.; Kratter, K. M. (2012). "On the Triple Evolution Dynamical Instability (TEDI)". The Astrophysical Journal. 760 (2): 99. doi:10.1088/0004-637X/760/2/99.
  21. ↑ Rufu, E.; Aharonson, O.; Perets, H. B. (2017). "A multiple-impact origin for the Moon". Nature Geoscience. 10 (2): 89–94. arXiv:1903.02525. Bibcode:2017NatGe..10...89R. doi:10.1038/ngeo2866.
  22. ↑ Mastrobuono-Battisti, M.; Perets, H. B.; Raymond, S. N. (2015). "A primordial origin for the compositional similarity between the Earth and the Moon". Nature. 520 (7546): 212–215. arXiv:1502.07346. Bibcode:2015Natur.520..212M. doi:10.1038/nature14333. PMID 25855458.
  23. ↑ Perets, H. B.; Kouwenhoven, M. B. N. (2012). "On the possibility of capturing free-floating planets". The Astrophysical Journal. 750 (1): 83. doi:10.1088/0004-637X/750/1/83.
  24. ↑ Perets, H. B.; Hopman, C.; Alexander, T. (2007). "Massive perturbers and the efficient growth of massive black holes". The Astrophysical Journal. 656: 709–720. doi:10.1086/510377.
  25. ↑ Perets, H. B.; Lahini, Y.; Poem, E.; et al. (2008). "Realization of Quantum Walks with Negligible Decoherence in Waveguide Lattices". Physical Review Letters. 100 (17) 170506. arXiv:0707.0741. Bibcode:2008PhRvL.100q0506P. doi:10.1103/PhysRevLett.100.170506. PMID 18518267.
  26. ↑ "Why the Moon's origins are still a mystery". BBC News. 9 April 2015. Retrieved 6 October 2025.
  27. ↑ "Multiple impacts may have formed the Moon". ScienceDaily. 9 January 2017. Retrieved 6 October 2025.
  28. ↑ "How stars capture rogue planets". Phys.org. 17 April 2012. Retrieved 6 October 2025.
  29. ↑ "New study reveals origin of the fastest white dwarfs in the Galaxy". Technion. 31 August 2025. Retrieved 6 October 2025.
  30. ↑ "Fastest white dwarfs in the Galaxy linked to new class of stellar explosions". Phys.org. 2 September 2025. Retrieved 6 October 2025.
  31. ↑ "Grief — Hagai Perets". BARD Poetry. 2023. Retrieved 6 October 2025.
  32. ↑ כהן, דפנה (2022). "Salonet – literary item". Salonet (in Hebrew). Retrieved 6 October 2025.
  33. ↑ "Haaretz – literature coverage (Hebrew)". Haaretz (in Hebrew). 7 September 2022. Retrieved 6 October 2025.
  34. ↑ "Foro Integración" (in Spanish). Fundación César Egido Serrano. Retrieved 6 October 2025.
  35. ↑ "ERC Consolidator Grants 2019: List of Principal Investigators" (PDF). European Research Council. 1 April 2020. Retrieved 6 October 2025.
  36. ↑ "Rothschild Fellows 1979–2023" (PDF) (in Hebrew). Yad Hanadiv. Retrieved 6 October 2025.
  37. ↑ "Hagai Perets won The Cooper Award for Excellence in Research". Technion. 28 June 2021. Retrieved 6 October 2025.
  38. ↑ "Dan David Prize – Scholars". Dan David Prize. Retrieved 6 October 2025.
  39. ↑ Perets, H. B.; Gal-Yam, A.; Neill, J. D.; et al. (2010). "A faint type of supernova from a white dwarf with a helium-rich companion". Nature. 465 (7296): 322–325. arXiv:0906.2003. Bibcode:2010Natur.465..322P. doi:10.1038/nature09056. PMID 20485429.
  40. ↑ Jordan, G. C.; Perets, H. B.; Fisher, R. T.; van Rossum, D. R. (2012). "Failed-Detonation Supernovae: Sub-Luminous Low-Velocity Ia Supernovae and Their Kicked Remnant White Dwarfs with Iron-Rich Cores". The Astrophysical Journal Letters. 761 (2): L23. arXiv:1208.5069. Bibcode:2012ApJ...761L..23J. doi:10.1088/2041-8205/761/2/L23.
  41. ↑ Zenati, Y.; Perets, H. B.; Dessart, L. (2023). "The Origins of Calcium-rich Supernovae From Disruptions of Carbon-oxygen White Dwarfs by Hybrid Helium–carbon-oxygen White Dwarfs". The Astrophysical Journal. 944 (1): 22. doi:10.3847/1538-4357/acacc0 (inactive 20 July 2026).{{cite journal}}: CS1 maint: DOI inactive as of July 2026 (link)
  42. ↑ McKernan, B.; Ford, K. E. S.; Lyra, W.; Perets, H. B. (2012). "Intermediate mass black holes in AGN discs". Monthly Notices of the Royal Astronomical Society. 425 (1): 460–469. doi:10.1111/j.1365-2966.2012.21560.x.
  43. ↑ Antonini, F.; Perets, H. B. (2012). "Secular Evolution of Compact Binaries near Massive Black Holes: Gravitational Wave Sources and Other Exotica". The Astrophysical Journal. 757 (1): 27. Bibcode:2012ApJ...757...27A. doi:10.1088/0004-637X/757/1/27.
  44. ↑ Ginat, Y. B.; Perets, H. B. (2021). "Analytical, Statistical Approximate Solution of Dissipative and Nondissipative Binary–Single Stellar Encounters". Physical Review X. 11 (3) 031020. arXiv:2011.00010. Bibcode:2021PhRvX..11c1020G. doi:10.1103/PhysRevX.11.031020.
  45. ↑ Ginat, Y. B.; Desjacques, V.; Reischke, R.; Perets, H. B. (2020). "The Probability Distribution of Astrophysical Gravitational-Wave Background Fluctuations". Physical Review D. 102 (8) 083501. arXiv:1910.04587. Bibcode:2020PhRvD.102h3501G. doi:10.1103/PhysRevD.102.083501.
  46. ↑ Rufu, E.; Aharonson, O.; Perets, H. B. (2017). "A multiple-impact origin for the Moon". Nature Geoscience. 10 (2): 89–94. arXiv:1903.02525. Bibcode:2017NatGe..10...89R. doi:10.1038/ngeo2866.
  47. ↑ Mastrobuono-Battisti, M.; Perets, H. B.; Raymond, S. N. (2015). "A primordial origin for the compositional similarity between the Earth and the Moon". Nature. 520 (7546): 212–215. arXiv:1502.07346. Bibcode:2015Natur.520..212M. doi:10.1038/nature14333. PMID 25855458.
  48. ↑ Perets, H. B.; Lahini, Y.; Poem, E.; et al. (2008). "Realization of Quantum Walks with Negligible Decoherence in Waveguide Lattices". Physical Review Letters. 100 (17) 170506. arXiv:0707.0741. Bibcode:2008PhRvL.100q0506P. doi:10.1103/PhysRevLett.100.170506. PMID 18518267.
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