With my group at API, I study neutron star physics, accretion flows, jets and winds using radio, infrared, optical, UV and X-ray observations from various Earth-based and space-based telescopes. The prime instruments we work with are the James Webb Space Telescope, Hubble Space Telescope, NuSTAR, Chandra, XMM-Newton, Swift, NICER and XRISM satellites, the Isaac Newton Telescope, Magellan, Gemini, and Very Large Telescope observatories, as well as the Very Large Array and Australia Telescope Compact Array radio facilities.

Current team members:
Postdocs
Eli Pattie: multi-wavelength jet studies of X-ray binaries (2025-present).
Julia Speichler: numerical simulations of accreting neutron stars (2025-present).

PhD candidates
Eleonora Caruso: high-resolution X-ray spectroscopy of X-ray binaries with XRISM (co-supervised with Elisa Costantini and Maria Diaz Trigo; 2023-present).
Chuanyu Wei: multi-wavelength jet studies of X-ray binaries (co-supervised with Jakob van den Eijnden; 2025-present).
Sara Peluso: PhD candidate at ESO Garching, high-resolution X-ray spectroscopy of X-ray binaries with XRISM (main advisor Maria Diaz Trigo; 2025-present).
Simo van de Vosse: GR-MHD simulations of accreting neutron stars (co-supervised with Oliver Porth and Jakob van den Eijnden; 2026-present).

Master students
Qianhang Chen: high-resolution X-ray observations of the accretion disk atmosphere in a neutron star X-ray binary (co-advised with Elisa Costantini).
Ylvie Gerritsma: reproducing astrophysical jets in the lab (co-advised with Oliver Porth, Oscar Versolato and John Sheil).
Daan Meuwissen: depositing thermonuclear burst ashes in the interstellar medium (co-advised with Steven Rieder and Daniela Huppenkothen).

Undergraduate (bachelor) students
Projects for 2025 being advertised soon!

Previous team members (since 2016):
Postdocs
Tom Russell: Independent NWO-Veni fellow, multi-wavelength jet studies of X-ray binaries (2016-2020). Now INAF fellow at the University of Palermo, Italy.
Aastha Parikh: X-ray and UV observations of accreting black holes and neutron stars (2019-2020).
Juan Hernández Santisteban: UV/optical/nIR observations of accreting black holes, neutron stars and white dwarfs (2016-2019).

PhD candidates
Stefanie Fijma: PhD candidate, binary evolution through multi-wavelength observations of binaries with compact objects (2021-2025). Now ESO fellow in Garching, Germany.
Jakob van den Eijnden: PhD candidate, X-ray/nIR/radio observations of accreting neutron stars (2016-2020). Now Marie Skłodowska-Curie fellow at the University of Amsterdam.
Khaled Alizai: PhD candidate at the Technical University of Denmark supervised by Jerome Chenevez, multi-observatory observations of thermonuclear X-ray bursts (2019).

Post-master students
Osman Ahmed: X-ray observations of very-faint X-ray transients (2019-2024).
Jari van Opijnen: X-ray/nIR correlation of X-ray binaries (2020-2021).
Elena López Navas: on ERASMUS+ program, X-ray/UV observations of accreting neutron stars and black holes (2018).

Master students
2024-2025
Divyanshi Agrawal: high-resolution X-ray observations of the accretion disk atmosphere in a neutron star X-ray binary (co-advised with Elisa Costantini).
Siddarth Gandini: crust cooling of accretion-heated neutron stars (main advisor Rudy Wijnands).
Corinna Olsen: high-resolution X-ray observations of the accretion disk atmosphere in a neutron star X-ray binary (main adviser Sascha Zeegers).
Simo van de Vosse: simulating the impact of thermonuclear bursts on the accretion flow (main adviser Oliver Porth).
Qianhang Chen: Astrovaria, searching for radio nebulae around X-ray binaries.

2023-2024
Noud Hover: new search algorithms for narrow lines in X-ray binary spectra.
Karla Rojas Martinez: high-resolution X-ray observations of the accretion disk atmosphere in a neutron star X-ray binary (co-advised with Elisa Costantini).

2022-2023
Iris Reitsma: the origin of the nIR emission in X-ray binaries.
Simon van Eeden: a new search search algorithm for narrow lines in X-ray binary spectra.
Eleonora Caruso: high-resolution X-ray observations of the accretion disk atmosphere in a neutron star X-ray binary (co-advised with Elisa Costantini).
Vysakh Puthusseril Anilkumar: Astrovaria, developing an algorithm to characterize the shapes of lines in UV/optical/nIR spectra of X-ray binaries.

2021-2022
Giorgos Zervas Koukogias: connecting the X-ray spectrum of neutron star X-ray binaries to their radio properties.
Konstantinos Zafeiropoulos: high-resolution X-ray observations of accretion disk atmospheres and winds in neutron star X-ray binaries (co-advised with Elisa Costantini).
Eleonora Caruso: Astrovaria, the thermonuclear bursts of the neutron star X-ray binary MXB 1659-28.

2020-2021
Luna van Haastere: H-alpha nebulae around X-ray binaries.

2019-2020
Mitchell Stoop: X-ray/UV/nIR/radio observations of an accreting black hole candidate.

2018-2019
Maria Georganti: X-ray/UV/nIR observations of a quiescent black hole candidate.
Alessio Marino: on ERASMUS+ program, neutron star mass/radius constraints from X-ray observations of quiescent X-ray binaries.

Undergraduate (bachelor) students
2024
Mats Bannink: the multi-wavelength outburst evolution of a very-faint X-ray binary.

2023
Rosa Verpoort: a white dwarf X-ray transient in the Galactic center?
Amber van Wijck: probing the evolution of X-ray binaries through their UV spectra.

2022
Daan de Rijk: very-faint X-ray transients in the Galactic center.
Sophie Schot: Undergraduate student technical physics at Fontys University of Applied Sciences, the accretion flow of a low-luminosity black hole X-ray binary.

2021
Mees Petrus: the nature of very-faint X-ray transients from their spectra.
Simon van Eeden: the nature of very-faint X-ray transients from their light curves.

2019
Alexis Andres: on ASPIRE program, X-ray flares from the supermassive black hole Sgr A*.
Jelle Groot: fast transient X-ray events in the center of the Milky Way.
Marieke van Etten: transient X-ray binaries in the Galactic center region.
Stefanie Fijma: X-ray/radio correlation of neutron star X-ray binaries.
Jorinde Kleverlaan: X-ray/radio correlation of neutron star X-ray binaries.

2018
Levi Kok: fast transient X-ray events in the center of the Milky Way.
Bilal Belhach: X-ray observations of accreting neutron stars.
Mick Rustenburg: optical/nIR observations of an accreting white dwarf.