Jacco Vink
A5020173077- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Neutrino Physics Research
- Particle Detector Development and Performance
- High-pressure geophysics and materials
- Galaxies: Formation, Evolution, Phenomena
- Mechanics and Biomechanics Studies
- Astronomical Observations and Instrumentation
- Particle Accelerators and Free-Electron Lasers
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Nuclear Physics and Applications
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Astronomy and Astrophysical Research
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
University of Amsterdam
2016-2025
SRON Netherlands Institute for Space Research
2005-2024
Marshall Space Flight Center
2023-2024
Saitama University
2024
European Space Research and Technology Centre
2024
Institute for Space Astrophysics and Planetology
2024
Vrije Universiteit Amsterdam
2024
ETH Zurich
2023
University of Würzburg
2023
Max Planck Institute for Physics
2023
Supernova remnants are beautiful astronomical objects that also of high scientific interest, because they provide insights into supernova explosion mechanisms, and the likely sources Galactic cosmic rays. X-ray observations an important means to study these objects.And in particular advances made imaging spectroscopy over last two decades has greatly increased our knowledge about remnants. It it possible map products fresh nucleosynthesis, resulted identification regions near shock fronts...
It is thought that Type Ia supernovae (SNe Ia) are explosions of carbon-oxygen white dwarfs (CO WDs). Two main evolutionary channels proposed for the WD to reach critical density required a thermonuclear explosion: single degenerate (SD) scenario, in which CO accretes from non-degenerate companion, and double (DD) two WDs merge. However, it remains difficult reproduce observed SN rate with these scenarios.
XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to Astronomy. At time of writing XIPE in competitive phase A as fourth medium size ESA (M4). It promises reopen polarimetry window high energy Astrophysics after more than 4 decades thanks detector that efficiently exploits photoelectric effect and optics with large effective area. uniqueness time-spectrally-spatially- resolved breakthrough astrophysics fundamental physics. Indeed payload consists three Gas Pixel Detectors...
Abstract As the nearest supernova (SN) observed since Kepler’s SN of 1604, 1987A provides an unprecedented opportunity to study in detail early evolution remnants. Despite extensive studies through both observations and simulations, there is still urgent need for a more effective approach integrate results from two sides. In this study, we conducted detailed differential emission measure (DEM) analysis on XMM-Newton taken 2007 2021 characterize continuous temperature structure 1987A, which...
We investigate the nonthermal X-ray emission from Cas A, using BeppoSAX, Compton Gamma Ray Observatory OSSE, and Chandra data. For hard continuum we test model proposed by Laming, which invokes bremsstrahlung electrons accelerated lower hybrid plasma waves. The justification for this comes our determination of a limit to average magnetic field B > 0.5 mG. such high fields, synchrotron losses are severe enough that most electron populations responsible radio have maximum energies well below...
We introduce a million second observation of the supernova remnant Cassiopeia A with Chandra X-Ray Observatory. The bipolar structure Si-rich ejecta (northeast jet and southwest counterpart) is clearly evident in new images, their chemical similarity confirmed by spectra. These are most likely due to jets as opposed cavities circumstellar medium, since we can reject simple models for latter. properties these Fe-rich will provide clues explosion Cas A.
About half of the baryons in local Universe are invisible and - according to simulations their dominant fraction resides filaments connecting clusters galaxies form low density gas with temperatures range 10^5
Cosmic rays are the most energetic particles arriving at earth. Although of them thought to be accelerated by supernova remnants, details acceleration process and its efficiency not well determined. Here we show that pressure induced cosmic exceeds thermal behind northeast shock remnant RCW 86, where X-ray emission is dominated synchrotron radiation from ultra-relativistic electrons. We determined cosmic-ray content Doppler broadening measured with optical spectroscopy, combined a...
The X-ray Integral Field Unit (X-IFU) on board the Advanced Telescope for High-ENergy Astrophysics (Athena) will provide spatially resolved high-resolution spectroscopy from 0.2 to 12 keV, with 5 arc second pixels over a field of view minute equivalent diameter and spectral resolution 2.5 eV up 7 keV. In this paper, we first review core scientific objectives Athena, driving main performance parameters X-IFU, namely resolution, view, effective area, count rate capabilities, instrumental...
We present a model for the type Ia supernova remnant (SNR) of SN 1604, also known as Kepler's SNR. find that its main features can be explained by progenitor symbiotic binary consisting white dwarf and an AGB donor star with initial mass 4−5 M⊙. The slow, nitrogen-rich wind emanating from has partially been accreted dwarf, but created circumstellar bubble. On basis observational evidence, we assume system moves velocity 250 km s-1. Owing to spatial velocity, interaction between interstellar...
Abstract Particle acceleration mechanisms in supermassive black hole jets, such as shock acceleration, magnetic reconnection, and turbulence, are expected to have observable signatures the multiwavelength polarization properties of blazars. The recent launch Imaging X-Ray Polarimetry Explorer (IXPE) enables us, for first time, use X-ray band (2–8 keV) probe jet synchrotron emission high-synchrotron-peaked BL Lac objects (HSPs). We report discovery linear (degree Π x = 15% ± 2% electric...
We report on the first observation of a radio-quiet Active Galactic Nucleus (AGN) using polarized X-rays: Seyfert 1.9 galaxy MCG-05-23-16. This source was pointed with Imaging X-ray Polarimetry Explorer (IXPE) starting May 14, 2022 for net observing time 486 ks, simultaneously XMM-Newton (58 ks) and NuSTAR (83 ks). A polarization degree smaller than $\Pi<4.7\%$ (at 99% c.l.) is derived in 2-8 keV energy range, where emission dominated by primary component ascribed to hot corona. The...
Abstract The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 2021 December 9 has opened a new window in astronomy. We report here results first IXPE observation weakly magnetized neutron star, GS 1826−238, performed 2022 March 29–31 when source was high soft state. An upper limit (99.73% confidence level) 1.3% for linear polarization degree is obtained over 2–8 keV energy range. Coordinated INTEGRAL and NICER observations were carried out simultaneously with IXPE. spectral...
Abstract We present initial results from a James Webb Space Telescope (JWST) survey of the youngest Galactic core-collapse supernova remnant, Cassiopeia A (Cas A), made up NIRCam and MIRI imaging mosaics that map emission main shell, interior, surrounding circumstellar/interstellar material (CSM/ISM). also four exploratory positions Medium Resolution Spectrograph integral field unit spectroscopy sample ejecta, CSM, associated dust representative shocked unshocked regions. Surprising...
Abstract We present the first X-ray polarimetric study of dipping accreting neutron star 4U 1624−49 with Imaging Polarimetry Explorer. report a detection polarization in nondip time intervals confidence level 99.99%. find an average degree (PD) 3.1% ± 0.7% and angle 81° 6° east north 2–8 keV band. upper limit on PD 22% during dips 95% confidence. The increases energy, reaching from 3.0% 0.9% 4–6 band to 6% 2% 6–8 This indicates likely arises Comptonization. high observed is unlikely be...
It is generally accepted that Anomalous X-ray Pulsars (AXPs) and Soft Gamma-ray Repeaters (SGRs) are magnetars, i.e. neutron stars with extremely high surface magnetic fields ($B > 10^{14}$ G). The origin of these uncertain, but a popular hypothesis magnetars born an initial spin period not much exceeding the convective overturn time (~3ms), which results in powerful dynamo action, amplifying seed field to $> ~10^{15}$ G. Part this rotation energy then expected power supernova through...
We report on our analysis of the 1 Ms Chandra observation supernova remnant Cas A in order to localize, characterize, and quantify nonthermal X-ray emission. More specifically, we investigated whether synchrotron emission from inside is outward shock, but projected toward inner ring, or shell. tackled this problem by employing a Lucy-Richardson deconvolution technique measuring spectral indices 4.2-6 keV band. show that most continuum coming an ring coincides with previously reported...
Context.The hot X-ray emitting gas in clusters of galaxies is a very large repository metals produced by supernovae. During the evolution clusters, billions supernovae eject their material into this Intra-Cluster Medium (ICM).
Abstract We have performed a multiwavelength study of supernova remnant (SNR) G57.2+0.8 and its environment. The SNR hosts the magnetar SGR 1935+2154, which emitted an extremely bright millisecond-duration radio burst on 2020 April 28. used 12 CO 13 J = 1–0 data from Milky Way Image Scroll Painting line survey to search for molecular gas associated with G57.2+0.8, in order constrain physical parameters (e.g., distance) magnetar. report that is likely impacting clouds (MCs) at local standard...
We report on a $\sim 5\sigma$ detection of polarized 3-6 keV X-ray emission from the supernova remnant Cassiopeia A with Imaging Polarimetry Explorer (IXPE). The overall polarization degree $1.8 \pm 0.3$% is detected by summing over large region, assuming circular symmetry for vectors. measurements imply an average synchrotron component 2.5$%, and close to 5% synchrotron-domimated forward-shock region. These numbers are based assessment thermal non-thermal radiation contributions, which we...
Abstract Magnetars are the most strongly magnetized neutron stars, and one of promising targets for X-ray polarimetric measurements. We present here first Imaging Polarimetry Explorer observation magnetar 1RXS J170849.0-400910, jointly analyzed with a new Swift archival NICER data. The total (energy- phase-integrated) emission in 2–8 keV energy range is linerarly polarized, at ∼35% level. phase-averaged polarization signal shows marked increase energy, ranging from ∼20% 2–3 up to ∼80% 6–8...