GRAPPA Colloquia

GRAPPA Colloquia are usually held on second and fourth Mondays of each month, but occasionally some talks do not follow this rule.

  • Time: 11:00−12:00 (unless otherwise noted)
  • Venue: C4.174 (unless otherwise noted)

See the calendar for all GRAPPA-related events.

See also the schedules for the Nikhef Theory SeminarsNikhef Colloquia, and API Colloquia.

Summer/Fall term 2021

13 Sep Sam Witte (UvA) Hunting for Axions near Neutron Stars C4.174 & Zoom
27 Sep Andrew Pontzen (UCL) Towards a welfare-focused work environment Zoom
25 Oct Auke-Pieter Colijn (Nikhef/UvA) Relic Neutrino Detection with PTOLEMY C4.174 & Zoom
1 Nov Alba Domi (Nikhef, INFN Genoa) Time delay estimation in unresolved lensed quasars C4.174 & Zoom
13 Dec Richard Anantua (Harvard) C4.174 & Zoom

Winter/Spring term 2022

24 Jan Francesca Calore (LAPTh) C4.174
14 Feb Roberta Zanin (Univ. Barcelona) C4.174
28 Feb Oscar Macias (UvA) C4.174
28 Mar Sascha Philippov (Flatiron) C4.174

Winter/spring term 2021

11 Jan Bangalore Sathyaprakash (Penn State) A Panorama of Gravitational-Wave Astronomy Zoom (15:00-16:00)
25 Jan Stephen Smartt (Queen’s University Belfast) Mergers, magnetars and multi-messengers Zoom
3 Feb Joseph Silk (IAP, JHU, Oxford) The Future of Cosmology Zoom
8 Feb Suvodip Mukherjee (GRAPPA, Leiden University, D-ITP) Mapping the Cosmos Using Multi-Messenger Observations Zoom
22 Feb Michele Vallisneri (Jet Propulsion Laboratory) The logic of detection: statistics and systematics in the search for gravitational waves with pulsar-timing arrays Zoom (16:00-17:00)
8 Mar Shin’ichiro Ando (GRAPPA) Formation and evolution of dark matter substructure: Semi-analytic approach Zoom
22 Mar Jérôme Guilet (CEA Saclay) Magnetar birth and the engine of extreme stellar explosions Zoom
12 Apr Ben Safdi (LBL) The Search for the QCD Axion Zoom (16:00-17:00)
10 May Benjamin Wandelt (IAP) A New Way of Doing Cosmology Zoom
31 May Jens Chluba (Manchester) Challenges and opportunities with CMB spectral distortions Zoom
14 June Adam Coogan (UvA) New inference techniques for unveiling dark matter substructure in strong gravitational lenses Zoom
28 June Asimina Arvanitaki (Perimeter Institute) Dark Matter halos from parametric resonance and their signatures Zoom (15:00-16:00)

Summer/Fall term 2020

14 Sep Tina Pollmann (Nikhef) Using Monte Carlo simulation to study the impact of digital contact tracing on the SARS-CoV-2 pandemic Zoom
17 Sep Karan Jani (Vanderbilt University) Discovery of a Lite-Intermediate Mass Black Hole Zoom (15:00-16:00)
23 Sep Fabian Schüssler (Irfu/CEA-Saclay) The transient high-energy sky Zoom
28 Sep Cora Dvorkin (Harvard) Unveiling the Nature of Dark Matter with Cosmological Observables Zoom (15:00-16:00)
12 Oct Miles Cranmer (Princeton) Interpretable Machine Learning for Astrophysics, using Symbolic Regression and Graph Neural Networks Zoom (15:00-16:00)
26 Oct Eleonora Troja (University of Maryland) Angle matters: studying neutron star mergers from a new perspective Zoom (15:00-16:00)
9 Nov Kenta Kiuchi (Max-Planck-Institut for Gravitational Physics) Theoretical modeling of binary neutron star mergers; Recent progress and future prospect Zoom
23 Nov Kumiko Kotera (IAP) Going further with high-energy multi-messenger astronomy Zoom
14 Dec Kalliopi Petraki (LAPTH) Dark matter: dynamics in old and new frontiers Zoom (14:00-15:00)

Winter/spring term 2020

13 Jan Henk Hoekstra (Leiden University) Weak lensing by large-scale structure as an accurate probe of cosmology and much more C4.174
27 Jan Julia Even (University of Groningen) The production of star dust in the laboratory C4.174
6 Feb Damiano Fiorillo (University of Napoli) Decaying Dark Matter at IceCube and its signature on High-Energy gamma experiments C4.174 (15:00-16:00)
10 Feb Francesca Day (Cambridge University/DAMTP) Axion superradiance in rotating neutron stars C4.174
12 Feb Philip Ruehl (University of Siegen) Follow-up Searches for UHE Photons and Neutrinos from Gravitational Wave Sources with the Pierre Auger Observatory C4.278 (15:00-16:00)
24 Feb Tom Broadhurst (UPV/EHU) The Origin of Lensed Binary Black Holes and the Influence of Wave Dark Matter C4.174
25 Feb Irvin Martinez (University of Capetown) Effective Field Theory for Astrophysics C4.174 (13:00-14:00)
28 Feb Roland Crocker (Australian National University) Cosmic ray feedback in star-formation and implications for gamma-ray emission from starbursts C4.174 (14:00-15:00)
4 Mar Masato Shirasaki (JPL/Caltech) Hunting gamma rays from dark matter and galaxy clusters C4.278 (15:00-16:00)
5 Mar Matthias Hanauske (ITP & FIAS, Frankfurt) Post-merger gravitational-wave signatures of phase transitions in binary mergers C4.124
6 Apr Béatrice Bonga (RU) Tidal resonance in Extreme Mass-Ratio Inspirals Zoom
11 May Siddarth Mishra-Sharma (NYU) Statistical inference of dark matter substructure using gravitational lensing Zoom (16:00-17:00)
25 May Archisman Ghosh (Leiden/GRAPPA/DITP) Bells Sirens & Beyond Zoom (14:00-15:00)
8 Jun Camila Correa (GRAPPA) Constraining Velocity-dependent Self-Interacting Dark Matter on small scales Zoom (14:00-15:00)
22 Jun Shirley Ho (Flatiron Institute) What can Deep Learning help in addressing Astrophysical Challenges Zoom (16:00-17:00)
6 Jul Flavia de Almeida Dias (IHEF) Dark Matter Searches at the LHC Zoom (14:00-15:00)

Summer/Fall term 2019

9 Jul Antonella Garzilli (Niels Borh Institute) Constraining the nature of dark matter with the Lyman-alpha forest C4.174
19 Jul Bernardita Ried (Universidad de Chile) Introduction to the Zig-Zag Process D1.113
13 Sep Doug Finkbeiner (Harvard University) Towards more robust and explainable neural nets: Beyond the black box C4.174
16 Sep Luca Visinelli (GRAPPA/UvA) Probing the Early Universe with Axion Physics C4.174
23 Sep Manuela Vecchi (KVI-University of Groningen) Spectral features in galactic cosmic rays C4.174
25 Sep Katy Clough (Oxford) Searching for light particles in strong gravity environments C4.174 (15:30-16.30)
30 Sep Christopher Tully (Princeton) How to be a lensmaker for the PTOLEMY cosmic neutrino telescope? C4.174
14 Oct Kenny Ng (GRAPPA) High-energy Gamma Rays and Neutrinos from the Sun C4.174
25 Oct Doug Lin (UCSC) Stellar rejuvenation and gravitational waves in AGN disks: Analog of planetary systems around massive black holes C4.174
28 Oct Gordon Baym (Illinois) Neutron stars and the properties of matter under extreme conditions C4.174
5 Nov Adam Pound (U. of Southampton) Accurately modelling extreme-mass-ratio inspirals: beyond the geodesic approximation C4.278 (14:00-15:00)
11 Nov Subodh Patil (NBI) Primordial black holes, inflation, and scale invariance C4.174
19 Nov Gilles Louppe (University of Liege) Neural likelihood-free inference C1.112 (10:00-11:00)
25 Nov Dan Scolnic (Duke) New Excitement In Measurements of Dark Energy and The Hubble Constant C4.174
9 Dec Enrico Morgante (DESY) Relaxion fragmentation C4.174
13 Dec Shri Kulkarni (Caltech) The Galactic Cosmic Ray Ionization C4.174 (15h-16h)

Winter/spring term 2019

9 Jan Karelle Siellez (UCSC) Gravitational waves, kilonovae & nearby low-luminous short gamma-ray bursts C1.174
14 Jan Katharine Kelley (ICRAR) Axion Dark Matter: Opportunities and Challenges with the SKA D1.112
21 Jan Simona Vegetti (MPA Garching) Strong gravitational lensing as a clean observational probe of dark matter C1.112
28 Jan Alex Geringer-Sameth (Imperial College London) Astrophysical vs. dark matter interpretations of gamma-ray observations in dwarf galaxies C4.174
31 Jan Patricia Schmidt (Birmingham University) GWTC-1: Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs C4.174
13th Feb Brad Cenko (NASA Goddard) Recent Observational Puzzles from Tidal Disruption Flares: Towards Viable Probes in the LSST Era C4.174
25 Feb Tetyana Galatyuk (TU Darmstadt) Exploring baryon rich QCD matter with HADES C4.174
11 Mar Francois Foucart (University of New Hampshire) Modeling Neutron Star Mergers: A numerical perspective C4.174
14 Mar Martin Hewitson (Max-Planck-Institut Hannover) LISA: Space-based Gravitational Wave Astronomy C4.174
25 Mar Anastasia Fialkov (Sussex University) Evaluating Cosmic Dawn G3.02
1 Apr Elisabeth Krause (University of Arizona) Cosmology with the Dark Energy Survey, and Beyond C4.174
8 Apr Mairi Sakellariadou (King’s College, UK) Stochastic gravitational waves background and its anisotropies C4.124
2nd May Valarie Domcke (DESY, Hamburg) Particle production in the early Universe C4.174 (10:30 – 11:30)
14 May Eugene Lim (King’s College, UK) What I talk about when I talk about Inflation C4.124
21 May Thomas Helfer (King’s College, UK) Gravitational waves from exotic compact objects C4.124
27 May Matthew Baring (Rice University) Magnetars as Neutron Star Speelplaatsen for Exotic Physics C4.174
29 May Michael Coughlin (Caltech) Before and after merger: Multi-messenger searches for compact binaries C4.124
4 Jun Sarah Gossan (Caltech) Wave heating from proto-neutron star convection and the core-collapse supernova explosion mechanism C0.110
24 Jun Mark Vogelsberger (MIT) Simulating Galaxy Formation: Illustris, IllustrisTNG and beyond C4.174

Summer/Fall term 2018

21 Jun Barbara Patricelli (SNS Pisa) Searching for Gamma-Ray counterparts to Gravitational Waves from merging binary neutron stars with the Cherenkov Telescope Array C4.174
27 Jun Jennifer Barnes (Columbia University) Nuclear Physics with Multi-Messenger Astronomy C4.174
30 July Fiona Panther (Australian National University) Antimatter in the Milky Way: a theoretical perspective C4.174
10 Sept Felicia Krauss (Grappa/API) TXS 0506+056, IC 170922A, and multimessenger observations of blazers C4.174
12 Sep Gregg Hallinan (Caltech) Imaging All the Sky All the Time in Search of Radio Exoplanets C4.174
17 Sept Kenta Hotokezaka (Princeton) GW170817: Kilonova and r-process origin C4.174
18 Sept JJ Eldridge (University of Aukland) Discussion on Gender diversity in Science and the inclusion of LGBTIQ students C4.176
18 Sept JJ Eldridge (University of Aukland) New BPASS results on Gravitational Wave events, X-ray binaries and Supernovae C4.176
8 Oct Daniel Mortlock (Imperial College) Unbiased estimation of the Hubble constant from binary neutron star mergers C4.174
22 Oct Sebastian Baum (Stockholm University) Paleo Detectors C4.174
6 Nov Andrea Bertoldi (IOA) MIGA and Atom Interferometry for low frequency Gravitational Wave detection GRAPPA/Nikhef special seminar 14:00-15:00 C4.174
12 Nov Jane Dai (Niels Bohr Institute, Copenhagen) Lessons on Super-Eddington Accretion Learnt from Tidal Disruption Events 12:00-13:00 C4.174
26 Nov David Kaplan (University of Wisconsin) C4.174
6 Dec Claire Guepin (IAP) GRAPPA special seminar 10:30-11:30 C4.174
10 Dec Ernazar Abdikamalov (Nazarbayev University) Core-Collapse Supernovae and Gravitational Waves C4.174
13 Dec Sarah Gossan (Caltech) Core-collapse supernova physics in the multi-messenger era C4.174

Summer term 2018

14 May Mauricio Bustamante (Niels Bohr Institute, University of Copenhagen) Distilling fundamental high-energy neutrino physics from the sky C4.174
28 May Dima Maliyshev (Friedrich-Alexander-Universität Erlangen-Nürnberg) C4.174
11 June Dario Grasso (Pisa INFN and Pisa University) Cosmic rays shining in the Galactic center C4.174
26 June Igor Irastorza (University of Saragoza) Search for axions with the International Axion Observatory C4.174

Winter/spring term 2017

23rd Jan Manuel Meyer (Oskar Klein Centre)  Astrophysical searches for axions and axionlike particles at gamma-ray energies C4.278
13 Feb Noam Libeskind (AIP Postdam)  Satellite Galaxies, Local Groups and the Cosmic Web
27 Feb Aart Heijboer (Nikhef) KM3NeT: The next generation neutrino telescope
13 Mar Jesus Zavala (Reykjavik University)  Towards an Effective THeory Of Structure formation (ETHOS)
27 Mar Mauro Valli (SISSA) Hints for New Physics from b to s transitions
10th April Stephen West (Royal Holloway University of London) Nuclear Dark Matter
19th April Alexander Tchekhovskoy (UC Berkeley) Simulations of Black Holes the Astrophysical Laboratories API/GRAPPA – 11:00am
24th April Felix Kahlhoefer (DESY) Phenomenology of self-interacting WIMPs
8 May Andrew Pontzen (UCL) Towards robust predictions of dark matter distributions around galaxies
22nd May Tanguy Pierog (Karlsruhe Institute for Technology) LHC and Cosmic Rays: The chicken or the egg?
29th May Jonathan Cornell (McGill University)
7th July Tracy Slayter (MIT) When Do Dark Bound States Matter? Special Seminar: C4.278 (11:00)

Summer/fall term 2016

5 Sept Ranjan Laha (Kavli/SLAC/Stanford) Two new avenues in dark matter indirect detection 11.00-12.00
9 Sept Wei Xue (MIT) Explore QCD splitting function with CMS open data Special Seminar A1.10
26 Sept Alfredo Urbano (CERN) The last gasp of dark matter effective field theory  C4.278
10 Oct Bradley Kavanagh (Paris VI) Dark Matter Particle Astronomy  C4.278
24 Oct Matthew Malek (University of Sheffield) Are Neutrinos Responsible for our Matter-Dominated Universe? C4.278
14 Nov Matteo Biagetti (UvA)  The peaks approach to halo clustering: theory and applications C4.278
28 Nov Valerie Domcke (APC, Paris Diderot) C4.278
12 Dec Paul McMillan (Lund University) Mass modelling the Milky Way with the parallaxes of 10^2 or 10^9 objects C4.278

Winter/spring term 2016

11 Jan Yudai Suwa (MPA/Kyoto) Neutrino acceleration: analogy with Fermi acceleration and Comptonization
25 Jan Alistar Currie (Imperial London) Updated results from the 2013 LUX dataset
8 Feb Valentina Vacca (Cagliari Observatory) Revealing the gamma-ray sky with the D3PO algorithm
22 Feb Fiorenza Donato (Turin University) Dark matter in the cosmic radiation: weak signals, great opportunities
14 Mar Franco Vazza (Hamburg Observatory) Constraining non-thermal energy in galaxy clusters
25 Apr Joerg Jaeckel (Heidelberg University) WISPy Dark Matter
2 May Elena Pian (Scuola Normale Superiore di Pisa) Relativistic jets: an overview of recent progress Special time: 15:00-16:00
9 May Brian Reville (Queen’s University Belfast) Shocks, particle acceleration and magnetic fields
23 May Alessandra Silvestri (Leiden) Unveiling dark energy from the large scale structure: challenges and progress
13 Jun Alberto Dominguez (Madrid) All the Light There Ever Was
27 Jun Jacobo Lopez Pavo Cosmological constraints on the seesaw scale

Summer/fall term 2015

14 Sep Chanda Prescod-Weinstein (MIT) Bose-Einstein Condensates in Space!
28 Sep Massimo Viola (Leiden) The Kilo Degree Survey: early lensing results
12 Oct Emma Storm (GRAPPA) Predictions for Dark Matter in Galaxy Clusters from Future Radio Surveys
26 Oct Daisuke Kawata (UCL) Spiral Arm Paradigm in Disk Galaxies Special time: 11:00-12:00
9 Nov Erik Verlinde (ITFA) Emergent Gravity and the Dark Universe Special time: 13:30-14:30
23 Nov Sergio Palomares Ruiz (Valencia) On the flavor composition of the IceCube neutrinos
14 Dec Stephan Zimmer (OKC) Observations of nearby Galaxy Clusters with the Fermi Large Area Telescope – Towards the first Gamma Rays from Galaxy Clusters

Winter/spring term 2015

12 Jan Alvise Raccanelli (JHU) Testing cosmological models with future galaxy surveys
26 Jan Francesca Vidotto (Nijmegen) Planck Stars
9 Feb Andrew Taylor-Castillo (DIAS) Cosmic Rays, Galactic Outflow, and Non-Thermal Emission
23 Feb Christopher McCabe (GRAPPA) Are WIMPs in trouble?
9 Mar Daniele Gaggero (SISSA) Connections between cosmic-ray physics, gamma-ray data analysis and Dark Matter detection
23 Mar Alexander Westphal (DESY) Large-field inflation – strings & pheno
13 Apr Kaustuv Basu (AIfA) A new look on diffuse radio emissions in galaxy clusters
11 May Torsten Bringmann (Oslo) Dark Matter with Long-Range Interactions: From cosmological opportunities to model-building considerations

Summer/fall term 2014

22 Sep Mustafa Amin (Cambridge) After Inflation
13 Oct Thomas Schwetz (Stockholm) On the neutrino mass spectrum
27 Oct Enrico Pajer (Utrecht) The Effective Field Theory of Large Scale Structures
10 Nov Alessandro Mirizzi (DESY) What Next on Axion-like Particles: Current Bounds and Discovery Opportunities
24 Nov Nassim Bozorgnia (GRAPPA) Probability that Dark Matter have been observed in direct detection experiments
8 Dec Nicolao Fornengo (Turin) Particle dark matter searches in the anisotropic sky

Winter/spring term 2014

Date Speaker Title Note
13 Jan Roberto Franceschini (Maryland) Post-LHC R-Parity Violating Supersymmetry
27 Jan Alexandre Marcowith (LUPM) Young supernova remnants as galactic PeVatrons:prospect for the Cerenkov Telescope Array
10 Feb Emilio Bellini (Heidelberg) Non-linearities in cosmology: the Dark Matter bispectrum
24 Feb Anders Pinzke (Stockholm) Cosmic rays in galaxy clusters and their non-thermal emission
10 Mar Irene Tamborra (GRAPPA) Neutrinos and supernova hydrodynamics
24 Mar Basudeb Dasgupta (ICTP) Neutrinos, Dark Matter, and New Interactions
14 Apr David Marsh (Oxford) On the cosmology of string theory axions, and their observational signatures
28 Apr Fabian Schmidt (MPA) Probing the Primordial Universe with Galaxy Clustering and Shapes
12 May Aaron Vincent (Valencia) Dark matter in the Sun: beyond standard models

Summer/fall term 2013

Date Speaker Title Note
26 Jun Germani Nardini MSSM, Strong Phase Transition and Baryogenesis versus LHC Constraints D1.112
8 Jul Toshifumi Futamase (Tohoku U) Subaru weak-lensing survey of dark matter subhalos in Coma cluster D1.112
12 Aug Takeshi Kobayashi (CITA) Large Tensor-to-Scalar Ratio in Small-Field Inflation
23 Sep Christoph Pfrommer (HITS) The Physics and Cosmology of TeV Blazars C4.278
30 Sep Justin Read (Surrey U) The Local Dark Matter Density 
7 Oct Kohta Murase (IAS, Princeton) Unveiling the Origin of High-Energy Neutrinos Observed by IceCube C4.278
21 Oct Miguel Pato (Munich) The way forward in dark matter searches C4.278
25 Oct Surjeet Rajendran (Stanford) CASPEr: the Cosmic Axion Spin Precession Experiment Friday 10:00–11:00, C4.278
28 Oct Enrico Borrielo (DESY) Probing Lorentz Invariance Violation with high-energy astrophysical neutrinos
11 Nov Till Eifert (SLAC) Searches for the supersymmetric partner of the top quark with the ATLAS Detector
18 Nov Ted Jacobson (Maryland) Spacetime approach to force-free magnetospheres  C4.278
25 Nov Wessel Valkenburg (Leiden) A Cosmic Skeleton from Fluid Dynamics
9 Dec Mark E. Dieckmann (Linkoeping University) Electrostatic shocks in the laboratory, in particle-in-cell simulations and in astrophysics C4.278
13 Dec Jacques Delabrouille (APC) CMB observations from space: Planck and beyond Friday 15:00–16:00

Winter/spring term 2013

Date Speaker Title Note
14 Jan Gary Shiu (UW, Madison) Primordial Fluctuations as a Probe of Fundamental Physics Special venue: A1.10
28 Jan Kumiko Kotera (IAP, Paris) Ultrahigh energy cosmic rays, pulsars, and supernovae Special venue: B0.207
4 Feb Toyokazu Sekiguchi (Nagoya U) Non-Gaussianity in isocurvature perturbations Special venue: A1.14
11 Feb Enzo Branchini (Rome) Galaxy Redshift Surveys: How Distortions Can Yield a Sharper View of the Universe Special venue: A1.14
18 Feb Raphael Bousso (LBL) The Cosmological Constant Problem and the Multiverse: Implications for Dark Energy and Dark Matter Special time & venue: 15:30-16:30 in A1.04
25 Feb Matthew Kleban (NYU) Testing the Multiverse with Observational Cosmology Special venue: A1.14
4 Mar Mark Lovell (Durham) A study of warm dark matter
11 Mar Matia Fornasa (Nottingham) What can we learn from gamma-ray anisotropies? Special venue: A1.14
13 Mar Javier Redondo (MPP, Munich) Axion (and WISPy) cold dark matter
8 Apr Daisuke Nagai (Yale U) Cosmology with CMB vs. Galaxy Clusters in the Planck Era Special venue: A1.06
12 Apr David G. Cerdeño (Madrid) Target complementarity for direct dark matter detection Special venue: A1.04
15 Apr Douglas Spolyar (IAP) Super cool Inflation-TeV scales Special venue: A1.14
22 Apr Michel Tytgat (Université Libre de Bruxelles) On Dark Matter creation through a Portal Special venue: A1.06
8 May Nana Cabo Bizet Heterotic mini-landscape in blow-up Special venue: D1.110
21 May Daan Meerburg (Princeton) In search of hints of resonance in the CMB power spectrum Special venue: D1.112

Summer/fall term 2012

Date Speaker Title
10 Sep Donghui Jeong (Johns Hopkins) Probing initial conditions with the large scale structure of the Universe
24 Sep Aaron Manalaysay (Zurich) Beyond the WIMP: the first direct detection limits on sub-GeV dark matter
8 Oct I-Sheng Yang (UvA) Stochastic Gravitational Wave Background and Binary Motion
22 Oct Donnino Anderhalden (Zurich) Can CDM survive without WDM?
29 Oct Sofia Sivertsson (KTH) WIMP diffusion in the Solar System and the neutrino signal from the Sun and the Earth
5 Nov Sara Rydbeck (DESY) Long-lived higgsinos as probes of gravitino dark matter at the LHC
12 Nov Cristiano Galbiati (Princeton) A Walk on the Dark Side
26 Nov Alejandro Ibarra (TUM, Munich) Higher order effects in dark matter annihilations
10 Dec Carsten Rott (Ohio State) Low-energy neutrinos as a novel signal for Dark Matter captured in the Sun