Conveners
Poster flash talks
- Aaron Golden
Poster flash talks
- Florent Mertens (Paris Observatory (LUX))
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Romain Meriot (Imperial College)22/09/2025, 16:00Poster
The Square Kilometre Array is expected to measure the 21-cm signal from the Epoch of Reionization (EoR) in the coming decade, and currently operating radio-interferometers might provide a detection even earlier. Recently reported upper limits, including the latest LOFAR results, have already started constraining the astrophysical parameters of the models of the EoR. The challenges that lie...
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Gabriella Di Gennaro (INAF-IRA)22/09/2025, 16:01Poster
Diffuse radio emission in galaxy clusters has been established to be linked with the presence of (re-)accelerated particles (i.e. cosmic rays, CRs) and magnetic fields (B). In the last years, thanks to the advent of highly-sensitive radio telescopes such as LOFAR and MeerKAT, the detection of diffuse radio emission has become possible also in clusters at high redshift (z>0.6). This allowed a...
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Mousumi Mahato (Tartu Observatory, University of Tartu, Estonia)22/09/2025, 16:02Poster
Understanding how often, and for how long, radio-loud AGN switch their jets on and off remains a central problem in extragalactic astrophysics. Double-double radio galaxies (DDRGs), whose two distinct pairs of lobes preserve the imprint of successive jet episodes, are rare laboratories for tackling this issue, particularly when the systems reach giant ( >1 Mpc) dimensions, giving exceptionally...
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Tong Pan (Leiden Observatory)22/09/2025, 16:03Poster
Aims. The origin of the morphological dichotomy between Fanaroff–Riley Class I (FRI) and Class II (FRII) radio galaxies has long
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been debated, and some theories propose that it may be influenced by their environments. In this study, we use galaxy clusters as
tracers of environment to investigate whether environmental conditions play a significant role in shaping the FRI/FRII... -
Sai Zhai (Leiden University)22/09/2025, 16:04Poster
Peaked-spectrum (PS) sources, known for their distinct peaked radio spectra, represent a type of radio-loud active galactic nuclei (AGN). Among these, megahertz-peaked spectrum (MPS) sources, which exhibit a spectral peak at a frequency of a hundred megahertz, have emerged as a potential tool for identifying high-redshift candidates. However, the potential evolutionary link between the...
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Lars Abbo (Leiden Observatory)22/09/2025, 16:05Poster
With the availability of new large area and deep 0.3" resolution LOFAR surveys in combination with Euclid imaging, it is now finally possible to carry out large statistical studies of the radio loud Active Galactic Nuclei (AGN) population across cosmic time in combination with host galaxy properties. Whereas previous studies were limited to z~2, constrained by either the depth of observations...
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Alessandro Benati (INAF - IRA)22/09/2025, 16:06Poster
The ViCTORIA (Virgo Cluster multi-Telescope Observations in Radio of Interacting galaxies and AGN) project is a unique multi-frequency radio survey of the Virgo cluster, combining LOFAR-LBA, LOFAR-HBA, and MeerKAT data to achieve unprecedented depth, resolution, and spectral coverage. The Virgo cluster, the closest rich cluster in the Universe, is a key target for understanding galaxy...
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Dr Pratik Dabhade (Astrophysics Division, NCBJ, Warsaw, Poland)22/09/2025, 16:07Poster
The morphologies of extended, double-lobed radio quasars beyond z>2.5 remain largely uncharted, and no systematic census of their structural properties across cosmic time has yet been undertaken. Filling this gap is essential for understanding how powerful jets couple to their evolving environments from the early Universe to the present day. Understanding how powerful FR II radio quasars...
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Jort Boxelaar (INAF - IRA)22/09/2025, 16:08Poster
Over the past five years, LOFAR’s Low Band Antenna (LBA) system has opened a new observational window in the electromagnetic spectrum, enabling imaging at unprecedented resolution and sensitivity. Until now the Dutch array has mainly been used for science. We present results from observations using both the Dutch and full International LOFAR Telescope where we imaged bright 3C sources at...
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Matteo Cianfaglione (INAF - IRA - University of Bologna)22/09/2025, 16:09Poster
Recent LOFAR observations of massive galaxy clusters revealed the presence of very extended and low brightness radio emission, named megahalo. Due to their size, megahalos could allow us to probe cluster volumes roughly 30 times larger than those covered by radio halos, opening a new window to study non-thermal components (cosmic rays and magnetic fields) and acceleration mechanisms in the...
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Patrycja Szybowska22/09/2025, 16:10Poster
H II regions are key tracers of recent star formation and Galactic structure. In this study, we present a method for identifying and characterizing H II regions by cross-matching data from the LOFAR Two-metre Sky Survey Data Release 3 (LoTSS DR-3) and the Wide-field Infrared Survey Explorer (WISE) catalog. Radio emission from LoTSS provides high-sensitivity, low-frequency observations, while...
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Chiara Stuardi (IRA INAF)22/09/2025, 16:12Poster
The advent of next-generation radio surveys, such as those conducted with LOFAR, ASKAP, and the upcoming SKA, is expected to revolutionise our understanding of the radio universe. However, the vast volume and complexity of data generated by these instruments present significant challenges for traditional manual cataloguing and data analysis techniques. To fully exploit these datasets, the...
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Duy Hoang (Thüringer Landessternwarte - TLS)22/09/2025, 16:13Poster
Abell 168 is among the lowest mass galaxy clusters known to host multiple-component diffuse radio emission in its outskirts. Previous observations with GLEAM and GMRT revealed two extended radio sources with elongated and circular morphologies, which were classified as radio relics (Dwarakanath et al. 2018). In this study, we present a comprehensive multi-wavelength analysis of Abell 168 using...
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Gaoxiang Jin (Max Planck Institute for Astrophysics)22/09/2025, 16:14Poster
We study the spatially resolved star formation, gas excitation, and outflow properties of AGN in the full MaNGA survey. These AGN are classified into Type 1, Type 2, infrared, and radio AGN based on their optical spectra, mid-infrared colours, and LoTSS photometry. We estimate the AGN contribution to emission lines, infrared and radio luminosities to trace the power of the narrow or broad line...
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Hyoyin Gan (Leibniz Institute for Astrophysics Potsdam (AIP))25/09/2025, 16:00Poster
The Sun is an extended, bright and variable source. Solar radio emission of our interest is often brief and intense, with a typical duration of a few seconds and a flux exceeding $10^7$ Jy. Due to these features, one can only use the brightest calibrators during calibration and cannot benefit from a long integration time for solar observations. This talk presents a new calibration method...
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Dorota Przepiórka-Skup (Centrum Badań Kosmicznych Polskiej Akademii Nauk)25/09/2025, 16:01Poster
Remote diagnostic of solar wind is of utmost importance for our understanding of the space weather and its impact on space and ground technologies. With help of interplanetary scintillation (IPS) observations we are able to asses some of the parameters of the solar wind plasma. Using LOFAR radio telescope we compare and analyse couple of SW velocity estimators, which we believe can improve...
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Dorota Przepiórka-Skup (Centrum Badań Kosmicznych Polskiej Akademii Nauk)25/09/2025, 16:02Poster
The May 2024 Mother’s Day superstorm, classified as a G5-level geomagnetic event, was the strongest since November 2003. While the ionospheric response to such extreme space weather is typically monitored by conventional tools like Global Navigation Satellite System (GNSS), ionosondes, and ground-based magnetometers, this study underscores the unique and pivotal contributions that LOFAR can...
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Karthik Bhandari (University of Turku)25/09/2025, 16:03Poster
Type II radio bursts are solar radio emissions associated with coronal shock waves and are believed to be produced by electrons accelerated by these shocks. As radio signatures of coronal shocks, they are typically found near the expanding edges of coronal mass ejections (CMEs), making them valuable for studying the dynamics of CME-related shocks in the solar corona. Here, we aim to determine...
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Jānis Šteinbergs25/09/2025, 16:04Poster
To study the ionosphere using LOFAR, strong radio sources such as Cassiopeia A (Cas A) or Cygnus A (Cyg A) are typically observed. However, few studies have explored the use of other sources, such as those from the 3C catalogue, for detecting ionospheric fluctuations. In my work with the LOFAR station LV614, I have conducted approximately 100 observations targeting 3C147 and 3C295, including...
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Dr Bartosz Dabrowski (Space Radio-Diagnostics Research Centre, University of Warmia and Mazury in Olsztyn)25/09/2025, 16:05Poster
We present first simultaneous observations of the different types of the solar radio bursts made with LOFAR Baldy station and CALLISTO spectrometers located in Baldy (Poland) and Neustrelitz (Germany). The CALLISTO spectrometer (Compound Astronomical Low frequency Low cost Instrument for Spectroscopy and Transportable Observatory) is a programmable heterodyne receiver operating in the 10-80...
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Daniel Clarkson (University of Glasgow)25/09/2025, 16:06Poster
Sub-second fine structures of solar radio bursts reveal complex dynamics in the corona, yet their observed features are additionally complicated by radio-wave scattering in the turbulent corona. LOFAR imaging of individual fine structures during a single event revealed puzzling, non-radial motions of apparent sources at superluminal speeds and rapid expansion on millisecond timescales. We...
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Etienne Bonnassieux (IAA-CSIC)25/09/2025, 16:07Poster
The CARMENES high-resolution spectrograph located at the 3.5m Calar Alto telescope, which provides simultaneous coverage at 0.52-1.71 micrometers, is a powerful instrument for the study of nearby M-dwarf stars. It has been central to a monitoring campaign of more than 2200 such objects, complementing its excellent infrared coverage with information from other bands ranging from the optical to...
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Vital De Henau (VUB)25/09/2025, 16:08Poster
Double-bump showers are a rare class of extensive air showers (EAS) predicted by Monte Carlo simulations. They occur when a high-energy secondary particle, the leading particle, travels significantly farther than the rest, creating a distinct double-peaked longitudinal profile. So far, no experiment has been able to directly detect these showers. The unique radio footprint of double-bump...
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Aleksandar Shulevski25/09/2025, 16:09Poster
I will present the initial results and planning on implementing constraints for LOFAR observation scheduling. These constraints are based on the metrics for the state of the ionosphere as well as solar activity (and radio emission) derived from dedicated monitoring. LOFAR station data reduction and the corresponding metrics will be discussed, as well the plans for their integration into the...
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Letizia Vincetti (Trinity College Dublin (TCD) - School of Physics)25/09/2025, 16:10Poster
The LOw Frequency Array (LOFAR) is a hierarchical array of dipole and bowtie antennas, distributed across Europe. The Irish LOFAR station (IE613) is located at Birr Castle, Co. Offaly. As one of the 14 international stations, it comprises a set of Low Band Antennas (LBA) and 96 High Band Antennas (HBA) tiles. The response of a single station is trivial and different works have been carried out...
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Dorota Przepiórka-Skup (Centrum Badań Kosmicznych Polskiej Akademii Nauk)25/09/2025, 16:11Poster
The Earth's ionosphere significantly influences low-frequency radio wave propagation, introducing distortions that challenge the precision of radio astronomical observations. The LOFAR Ionospheric Research Group (LIRG) leverages the unique capabilities of the LOw Frequency ARray (LOFAR) to study these ionospheric effects. LIRG fosters collaboration between ionospheric scientists and radio...
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Lars Zwaan (University of Amsterdam)25/09/2025, 16:12Poster
In recent years, a new class of radio transients has emerged: Long Period Transients (LPTs). These radio transients have unexpectedly long periods of minutes to hours, with burst durations of seconds to minutes. In this project, we have developed a new method of analysing data from LOFAR to detect radio transients on intermediate timecales (seconds to minutes) in real time. It has been tested...
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Leszek Błaszkiewicz (Space Radio-Diagnostics Research Centre, UWM Olsztyn)25/09/2025, 16:13Poster
Radio diagnostics of the ionosphere based on measurements using LOFAR and GNSS and their combination, and using data from ionosondes, satellites, incoherent scatter radar, etc. is being used to solve a number of practical (such as ultra-high-precision positioning) and fundamental problems in the physics of ionospheric plasma and coupling in the system Sun-Solar Wind (SSW)-Lithosphere...
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