AstroNu er en forskningsgruppe på Niels Bohr Institutet ved Københavns Universitet. Vi er tilknyttet Niels Bohr International Academy og DARK og arbejder i krydsfeltet mellem astrofysik og fundamental fysik. AstroNu er en forskningsgruppe på Niels Bohr Institutet ved Københavns Universitet. Vi er tilknyttet Niels Bohr International Academy og DARK og arbejder i krydsfeltet mellem astrofysik og fundamental fysik. AstroNu er en forskningsgruppe på Niels Bohr Institutet ved Københavns Universitet. Vi er tilknyttet Niels Bohr International Academy og DARK og arbejder i krydsfeltet mellem astrofysik og fundamental fysik. AstroNu er en forskningsgruppe på Niels Bohr Institutet ved Københavns Universitet. Vi er tilknyttet Niels Bohr International Academy og DARK og arbejder i krydsfeltet mellem astrofysik og fundamental fysik. AstroNu er en forskningsgruppe på Niels Bohr Institutet ved Københavns Universitet. Vi er tilknyttet Niels Bohr International Academy og DARK og arbejder i krydsfeltet mellem astrofysik og fundamental fysik.


The AstroNu team aims at unveiling the nature of fascinating weakly interacting elementary particles, such as the neutrino, and explores the role of these  particles in astrophysical sources, in the synthesis of new elements, and in the Early Universe. The AstroNu group also adopts neutrinos as probes of the inner workings of astrophysical transients together with photons, cosmic rays, and gravitational waves. 





























Current Group members

Irene Tamborra Irene Tamborra, Professor & Group Leader

Email: tamborra*

Publications: ADS, INSPHIRE-HEP

Rasmus S. L. Hansen

Rasmus S. L. Hansen, INTERACTIONS Postdoctoral Fellow
Email: rasmus.lundkvist*


Shashank Shalgar Shashank Shalgar, Postdoctoral Fellow

Email: shashank.shalgar*

Publications: ADS, INSPHIRE-HEP

Ersilia Guarini

Ersilia Guarini, PhD student
Email: ersilia.guarini*

Publications: ADS, INSPHIRE-HEP

Ian Padilla-Gay

Ian Padilla-Gay, PhD student
Email:  ian.padilla*

Publications: ADS, INSPHIRE-HEP 

Tetyana Pitik Tetyana Pitik, PhD student
Email: Tetyana.Pitik*

Publications: ADS, INSPHIRE-HEP
Jonathan Bödewadt

Jonathan Bödewadt, Exchange Student, University of Hamburg, Germany

Email: jonathan*

Publications: ADS, INSPHIRE-HEP

Arun Krishna Ganesan Arun Krishna Ganesan, Master Student

Email: wzc189*

Publications: ADS, INSPHIRE-HEP 

Garðar Sigurðarson Garðar Sigurðarson, Master Student

Email: jcs272*

Publications: ADS, INSPHIRE-HEP 

Affiliated scientists

Meng-Ru Wu Meng-Ru Wu, Assistant Research Fellow (Academia Sinica, Taiwan)

Email: mwu*

Publications: ADS, INSPHIRE-HEP


Former group members

Edoardo Vitagliano

Edoardo Vitagliano, Rosenfeld Visiting Fellow, University of California, Los Angeles 

Publications: ADS, INSPHIRE-HEP

Anna Suliga

Anna Suliga, PhD Student
(2018-2021 ---> Postdoctoral Fellow, UC Berkeley, US)

Publications: ADS, INSPHIRE-HEP 

Lila Sarfati

Lila Sarfati, Exchange Student, Ecole Normale Supérieure, Paris, France

Publications: ADS, INSPHIRE-HEP

Laurie Walk

Laurie Walk, PhD Student
(2017-2021 ---> Research & Development, Non-academic sector)

Publications: ADS, INSPHIRE-HEP

Rohan Kumar

Rohan Kumar,MSc Student

Publications: ADS, INSPHIRE-HEP

Daniel Abdulla Bobruk

Daniel Abdulla Bobruk, MSc Student

(2020 --> CERN Internship)


Mauricio Bustamante

Mauricio Bustamante, Postdoctoral Fellow
(2017-2020 ---> Villum Young Investigator, Niels Bohr Institute, Denmark)


Marie-Louise Riis

Marie-Louise Riis, MSc Student

Publications: ADS, INSPHIRE-HEP

Charlotte A. Rosenstrøm

Charlotte A. Rosenstrøm, MSc Student

Publications: ADS, INSPHIRE-HEP

Karen Macías Cárdenas

Karen Macías Cárdenas, Exchange Student, Autonomous University of Baja California, Mexico

(2019-2020 --> Graduate student, Queen's University, Canada)

Kilian Hersent

Kilian Hersent, Exchange Student, Ecole Nationale Supérieure de Techniques Avancées, Paris, France


Peter Denton Peter Denton,Postdoctoral Fellow

(2016-2018. ---> Assistant Physicist, Brookhaven National Laboratory, US)

Publications: ADS, INSPHIRE-HEP

Klaes Møller Klaes Møller, MSc Student


Publications: ADS, INSPHIRE-HEP

Anna Suliga Anna Suliga, MSc Student

(2017-2018 ---> PhD Student at Niels Bohr Institute, Denmark)

Publications:  ADS, INSPHIRE-HEP  

Veronica Sølund Kirsebom Veronica Sølund Kirsebom, MSc Student


(2016-2018. ---> PhD Student at École Polytechnique Fédérale de Lausanne, Switzerland)

Meng-Ru Wu Meng-Ru Wu, Postdoctoral Fellow

(2016-2017. ---> Assistant Research Fellow at Academia Sinica, Taiwan)

Publications: ADS, INSPHIRE-HEP 

Mia-Louise Nielsen Mia-Louise Nielsen, BSc Student



Bo Schmidt Bo Schmidt, Research Assistant





































































  • E. Guarini, I. Tamborra, R. Margutti, Looking at Luminous Fast Blue Optical Transients through Neutrino Glasses, arXiv: 2205.12282.
  • J. J. Ziegler, T. D. P. Edwards, A. M. Suliga, I. Tamborra, S. Horiuchi, S. Ando, K. Freese, Non-Universal Stellar Initial Mass Functions: Large Uncertainties in Star Formation Rates at z=2-4 and Other Astrophysical Probes, arXiv: 2205.07845.
  • R.S.L. Hansen, S. Shalgar, I. Tamborra, Collisional dilemma: Enhancement or damping of fast flavor conversion of neutrinos, arXiv: 2204.11873.
  • A. Caputo, G. Raffelt, E. Vitagliano, Radiative transfer in stars by feebly interacting bosons, arXiv: 2204.11862.
  • P. Sarmah, S. Chakraborty, I. Tamborra, K. Auchettl, High energy particles from young supernovae: gamma-ray and neutrino connections, arXiv: 2204.03663.
  • O. Just, S. Abbar, M.-R. Wu, I. Tamborra, H.-T. Janka, F. Capozzi, Fast Neutrino Conversion in Hydrodynamic Simulations of Neutrino-Cooled Accretion Disks, arXiv: 2203.16559


  • A.M. Suliga, J.F. Beacom, I. Tamborra, Towards Probing the Diffuse Supernova Neutrino Background in All Flavors, Phys. Rev. D 105 (2022) 043008 [arXiv: 2112.09168].
  • E. Guarini, I. Tamborra, D. Bégué, T. Pitik, J. Greiner, Multi-messenger detection prospects of gamma-ray burst afterglows with optical jumps, arXiv: 2112.07690.
  • R. Alves Batista et al., EuCAPT White Paper: Opportunities and Challenges for Theoretical Astroparticle Physics in the Next Decade, arXiv: 2110.10074.
  • T. Pitik, I. Tamborra, C. R. Angus, K. Auchettl, Is the high-energy neutrino event IceCube-200530A associated with a hydrogen rich superluminous supernova?, Astrophys. J. 929 (2022) no.2, 163 [arXiv: 2110.06944].
  • L. Sarfati, R. S. L. Hansen, I. Tamborra, Triangulating Black Hole Forming Collapses through Neutrinos, Phys. Rev. D 105 (2022) 02 [arXiv: 2110.02347].
  • I. Padilla-Gay, I. Tamborra, G. Raffelt, Neutrino flavor pendulum reloaded: The case of fast pairwise conversion, Phys. Rev. Lett. 128 (2022) 121102 [arXiv: 2109.14627].
  • I. Padilla-Gay, S. Shalgar, Fast flavor conversion of neutrinos in presence of matter bulk velocity, arXiv: 2108.00012.
  • S. Shalgar, I. Tamborra, Symmetry breaking induced by pairwise conversion of neutrinos in compact sources, Phys. Rev. D 105 (2022) 043018 [arXiv: 2106.15622].
  • D. Das et al., A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents, JHEP 11 (2021) 079 [arXiv: 2106.06425].
  • S. Shalgar, I. Tamborra, The three flavor revolution in fast pairwise neutrino conversion, Phys. Rev. D 104 (2021) 023011 [arXiv: 2103.12743].
  • T. Pitik, I. Tamborra, M. Petropoulou, Neutrino signal dependence on gamma-ray burst emission mechanism, JCAP 05 (2021) 034 [arXiv: 2102.02223].


  • N. Song et al., The Future of High-Energy Astrophysical Neutrino Flavor Measurements, JCAP 04 (2021) 054 [arXiv: 2012.12893].
  • A. M. Suliga, S. Shalgar, G. M. Fuller, A closer look at the pp-chain reaction in the Sun: Constraining the coupling of light mediators to protons, JCAP 07 (2021) 042 [arXiv: 2012.11620].
  • S. Abbar, F. Capozzi, R. Glas, H.-T. Janka, I. Tamborra, On the characteristics of fast neutrino flavor instabilities in three-dimensional core-collapse supernova models, Phys. Rev. D 103 (2021) no. 6, 063033 [arXiv: 2012.06594].
  • R. S. L. Hansen, S. Shalgar, I. Tamborra, Neutrino flavor mixing breaks isotropy in the early universe, JCAP 07 (2021) 017 [arXiv: 2012.03948].
  • I. Tamborra, S. Shalgar, New Developments in Flavor Evolution of a Dense Neutrino Gas, Ann. Rev. Nucl. Part. Sci. 71 (2021) 165-188 [arXiv: 2011.01948].
  • S. Shalgar, I. Tamborra, A change of direction in pairwise neutrino conversion physics: The effect of collisions, Phys. Rev. D 103 (2021) 063002 [arXiv: 2011.00004].
  • S. Al Kharusi et al., SNEWS 2.0: A Next-Generation SuperNova Early Warning System for Multi-Messenger Astronomy, New J. Phys. 23 (2021) 031201 [arXiv: 2011.00035].
  • A. M. Suliga, I. Tamborra, Astrophysical constraints on non-standard coherent neutrino-nucleus scattering, Phys. Rev. D 103 (2021) 083002 [arXiv: 2010.14545].
  • M. George, M.-R. Wu, I. Tamborra, R. Ardevol-Pulpillo, H.-T. Janka, Fast neutrino flavor conversion, ejecta properties, and nucleosynthesis in newly-formed hypermassive remnants of neutron-star mergers, Phys. Rev. D 102 (2020) no. 10 [arXiv: 2009.04046].
  • I. Padilla-Gay, S. Shalgar, I. Tamborra, Multi-Dimensional Solution of Fast Neutrino Conversions in Binary Neutron Star Merger Remnants, JCAP 01 (2021) 017 [arXiv: 2009.01843].
  • M. Ahlers, M. Bustamante, N. G. Nortvig Willesen, Flavors of Astrophysical Neutrinos with Active-Sterile Mixing, JCAP 07 (2021) 029 [arXiv: 2009.01253].
  • M. Bustamante, I. Tamborra, Using High-Energy Neutrinos as Cosmic Magnetometers, Phys. Rev. D 102 (2020) 12, 123008 [arXiv: 2009.01306].
  • S. Shalgar, I. Tamborra, Dispelling a myth on dense neutrino media: fast pairwise conversions depend on energy, JCAP 01 (2021) 014 [arXiv: 2007.07926].
  • A.M. Suliga, I. Tamborra, M.-R. Wu, Lifting the core-collapse supernova bounds on keV-mass sterile neutrinos, JCAP 08 (2020) 018 [arXiv: 2004.11389].
  • L. Pattavina, N. Ferreiro Iachellini, I. Tamborra, Neutrino observatory based on archeological lead, Phys. Rev. D 102 (2020) no. 6, 063001 [arXiv: 2004.06936].
  • M. Bustamante, New limits on neutrino decay from the Glashow resonance of high-energy cosmic neutrinos, arXiv: 2004.06844.
  • T. Hasegawa et al., MeV-scale reheating temperature and cosmological production of light sterile neutrinos, JCAP 08 (2020) 015 [arXiv: 2003.13302].
  • M. Bustamante, C. Rosenstroem, S. Shalgar, I. Tamborra, Bounds on secret neutrino interactions from high-energy astrophysical neutrinos, Phys. Rev. D 101 (2020) no.12, 123024 [arXiv: 2001.04994].


  • S. Shalgar, I. Tamborra, M. Bustamante, Core-collapse supernovae stymie secret neutrino interactions, Phys. Rev. D 103 (2021) 123008 [arXiv: 1912.09115].
  • S. Shalgar, I. Padilla-Gay, I. Tamborra, Neutrino propagation hinders fast pairwise flavor conversions, JCAP 06 (2020) 048 [arXiv: 1911.09110].
  • L. Walk, I. Tamborra, H.-T. Janka, A. Summa, D. Kresse, Neutrino emission characteristics of black hole formation in three-dimensional simulations of stellar collapse, Phys. Rev. D 101 (2020) no.12, 123013 [arXiv: 1910.12971].
  • E. Vitagliano, I. Tamborra, G. Raffelt, Grand Unified Neutrino Spectrum at Earth, Rev. Mod. Phys. 92 (2020) 045006 [arXiv: 1910.11878].
  • A. M. Suliga, I. Tamborra, M.-R. Wu, Tau lepton asymmetry by sterile neutrino emission -- Moving beyond one-zone models, JCAP 12 (2019) 019 [arXiv: 1908.11382].
  • J. R. Westernacher-Schneider, E. O'Connor, E. O'Sullivan, I. Tamborra, M.-R. Wu, S. M. Couch, F. Malmenbeck, Multimessenger Asteroseismology of Core-Collapse Supernovae, Phys. Rev. D 100 (2019) 12 [arXiv: 1907.01138].
  • M. Bustamante, Exact neutrino oscillation probabilities: a fast general-purpose computation method for two and three neutrino flavors, arXiv: 1904.12391.
  • S. Shalgar and I. Tamborra, On the Occurrence of Crossings Between the Angular Distributions of Electron Neutrinos and Antineutrinos in the Supernova Core, Astrophys. J. 883 (2019) 80 [arXiv: 1904.07236].
  • C. Fryer et al., Core-Collapse Supernovae and Multi-Messenger Astronomy, Bull. Am. Astron. Soc. 51 (2019) 122.
  • R. Alves Batista et al., Open Questions in Cosmic-Ray Research at Ultrahigh Energies, Front. Astron. Space Sci. 6 (2019) 23 [arXiv: 1903.06714].
  • M. Ackermann et al., Astrophysics Uniquely Enabled by Observations of High-Energy Cosmic Neutrinos, Bull. Am. Astron. Soc. 51 (2019) 185 [arXiv: 1903.04334].
  • M. Ackermann et al., Fundamental Physics with High-Energy Cosmic Neutrinos, Bull. Am. Astron. Soc. 51 (2019) 215 [arXiv: 1903.04333].
  • M. Bustamante and M. Ahlers, Inferring the flavor of high-energy astrophysical neutrinos at their sources, Phys. Rev. Lett. 122 (2019) no. 24, 241101  [arXiv: 1901.10087].
  • L. Walk, I. Tamborra, H.-T. Janka, A. Summa, Effects of SASI and LESA in the neutrino emission of rotating supernovae, Phys. Rev. D 100 (2019) no.6, 063018 [arXiv: 1901.06235].

More publications >>


























































  • Edoardo Vitagliano (UC, Los Angeles), Feb.-Apr. 2022


  • Masaru Shibata (AEI, Potsdam), Nov. 2019
  • George M. Fuller (UC, San Diego), Aug. 2019
  • Angela Olinto (U. of Chicago), Aug. 2019
  • Alessandro Mirizzi (Bari U.), June 2019
  • Francis Halzen (University Wisconsin-Madison), Jan. 2019


  • Kate Scholberg (Duke U.), July 2018
  • Samaya Nissanke (U. of Amsterdam), July 2018
  • Sera Markoff (U. of Amsterdam), July 2018
  • Sebastian Heinz (U. of Wisconsin), July 2018
  • Wick Haxton (UC, Berkeley), July 2018
  • Jonathan Gair (U. of Edinburg), July 2018
  •  Johan Samsing (Princeton), June 2018
  • Alexei Yu. Smirnov (MPIK, Heidelberg), Mar. 2018
  • Stephen Parke (Fermilab), Feb. 2018



  • Elisa Resconi (TUM, Munich), Dec. 2017
  • Anna Franckowiak (DESY Zeuthen), Nov. 2017
  • Eli Waxman (Weizmann Institute of Science), Nov. 2017
  • Fiorenza Donato (INFN & University of Turin), Oct. 2017
  • Jeremiah Murphy (Florida State University), July 2017
  • Manibrata Sen (TIFR, Mumbai), June 2017
  • Kohta Murase (Penn State University), June 2017
  • Shin'ichiro Ando (GRAPPA, Amsterdam), May 2017
  • Andreas Bauswein (HITS, Heidelberg), Feb. 2017



  • Pasquale Serpico (LAPTh, Annecy), Dec. 2016
  • Licia Verde (ICC, Barcelona), Nov. 2016
  • Christoph Weniger (GRAPPA, Amsterdam), Nov. 2016
  • Manuel Meyer (OKC, Stockholm), Nov. 2016
  • Martin Pohl (DESY Zeuthen & Potsdam University), Oct. 2016
  • Torsten Enßlin (MPA, Garching), Sep. 2016
  • Steen Hannestad (Aarhus U.), Aug. 2016
  • Eligio Lisi (INFN, Bari), Aug. 2016
  • Teresa Montaruli (U. of Geneva), Aug. 2016
  • Mauricio Bustamante (Ohio State University), May 2016






















In the Media



























Seminars and Meetings

  • Once a week we host an Astroparticle Physics Seminar on a broad range of topics of interest to particle astrophysics, astrophysics and cosmology. The seminars usually take place in Auditorium A on Mondays at 14:15.
  • Once every other week we host an informal astroparticle journal club, in which group members and visitors discuss recent research papers or other topics of interest. The journal club takes place on Thursdays at 12:30 in room Bk2.
  • Every other Tuesday at 13:15 at DARK we host an informal discussion on astrophysical transients.

PhD Schools

Conferences and Workshops



  • Fundaments of High-Energy Astrophysics and Particle Astrophysics [2019/2020 & 2018/2019, block 4]. 
  • Gravitational dynamics and galaxy formation [2016/2017, block 3 & 2017/2018, block 3]. 


















Our group is based at the Niels Bohr International Academy, Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen, Denmark.

Irene TamborraProfessor, Irene Tamborra
Phone: + 45 35 33 32 27
Email: tamborra*



Michelle VestergaardNBIA Research Academic Officer, Michelle Westergaard
Phone: +45 35327256
Email: michelle.westergaard*