Publications (56)
LOFAR 144-MHz follow-up observations of GW170817
J. W. Broderick, T. W. Shimwell, K. Gourdji +66
We present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by A…
Multiwavelength study of the radio emission from a tight galaxy pair Arp 143
B. Nikiel-WroczyÅski, M. Jamrozy, M. Soida +1
We present results of the recent low-frequency radio observations of a tight galaxy pair Arp 143 at 234 and 612 MHz. These data are analysed together with the archive data at 1490,…
A dynamical model for the Taffy galaxies UGC 12914/5
B. Vollmer, J. Braine, M. Soida
The spectacular head-on collision of the two gas-rich galaxies of the Taffy system, UGC 12914/15, gives us a unique opportunity to study the consequences of a direct ISM-ISM collis…
Ram pressure stripping of the multiphase ISM in the Virgo cluster spiral galaxy NGC 4438
B. Vollmer, M. Soida, A. Chung +4
Ram pressure stripping of the multiphase ISM is studied in the perturbed Virgo cluster spiral galaxy NGC 4438. This galaxy underwent a tidal interaction ~100 Myr ago and is now str…
Deciphering the radio-star formation correlation on kpc scales. IV. Radio halos of highly-inclined Virgo cluster spiral galaxies
B. Vollmer, M. Soida, V. Heesen
In addition to the radio continuum emission of the thin galactic disk, vertically extended emission is ubiquitous in starforming disk galaxies. This halo emission can represent an…
Pre-peak ram pressure stripping in the Virgo cluster spiral galaxy NGC 4501
B. Vollmer, M. Soida, A. Chung +5
VIVA HI observations of the Virgo spiral galaxy NGC 4501 are presented. The HI disk is sharply truncated to the southwest, well within the stellar disk. A region of low surface-den…
MHD Space Sailing
T. Kisiel, M. Soida
The rocket technology dates back as far as medieval China. Used initially for entertainment and religious practices over time rockets evolved into weapons and finally into means of…
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). VIII. Modeling ram pressure stripping of diffuse gas in the Virgo cluster spiral galaxy NGC 4330
B. Vollmer, M. Fossati, A. Boselli +7
NGC 4330 is one of the Virgo galaxies whose UV distribution shows a tail structure. An associated tail structure is also observed in the HI and H emission distributions. Previo…
CHANG-ES XIII: Transport processes and the magnetic fields of NGC 4666 - indication of a reversing disk magnetic field
Y. Stein, R. -J. Dettmar, J. Irwin +10
We analyze the magnetic field geometry and the transport processes of the cosmic rays of the edge-on spiral starburst galaxy NGC 4666 from CHANG-ES radio continuum data in two freq…
The uneven sisters I, NGC 4388 - a strongly constrained ram pressure stripping event
B. Vollmer, C. Pappalardo, M. Soida +1
Since the Virgo cluster is the closest galaxy cluster in the northern hemisphere, galaxy interactions can be observed in it with a kpc resolution. The spiral galaxy NGC 4388 underw…
Magnetic fields in the absence of spiral density waves - NGC 4414
M. Soida, R. Beck, M. Urbanik +1
We present three-frequency VLA observations of the flocculent spiral galaxy NGC 4414 made in order to study the magnetic field structure in absence of strong density wave flows. NG…
Discovery of a tidal dwarf galaxy in the Leo Triplet
B. Nikiel-WroczyÅski, M. Soida, D. J. Bomans +1
We report discovery of a dwarf galaxy in the Leo Triplet. Analysis of the neutral hydrogen distribution shows that it rotates independently of the tidal tail of NGC 3628, with a ra…
Cosmic-ray driven dynamo in galactic disks
M. Hanasz, K. Otmianowska-Mazur, H. Lesch +6
We present new developments on the Cosmic--Ray driven, galactic dynamo, modeled by means of direct, resistive CR--MHD simulations, performed with ZEUS and PIERNIK codes. The dynamo…
Magnetic fields and strong density waves in the interacting galaxy NGC 3627
M. Soida, M. Urbanik, R. Beck +1
We present 10.55 GHz observations of strong density-wave spiral NGC 3627. Total power and polarization maps with a resolution of 1.13', sensitive to a weak extended emmision were o…
The influence of the cluster environment on the large-scale radio continuum emission of 8 Virgo cluster spirals
B. Vollmer, M. Soida, A. Chung +5
The influence of the environment on the polarized and total power radio continuum emission of cluster spiral galaxies is investigated. We present deep scaled array VLA 20 and 6 cm…
Detection of spiral magnetic fields in two flocculent galaxies
J. Knapik, M. Soida, R. -J. Dettmar +2
Two flocculent galaxies NGC 3521 and NGC 5055 has been observed at 10.55GHz with the Effelsberg 100m telescope. In both cases polarized emission reveals substantial radial componen…
Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline
L. K. Morabito, N. J. Jackson, S. Mooney +71
[abridged] The International LOFAR Telescope is an interferometer with stations spread across Europe. With baselines of up to ~2,000 km, LOFAR has the unique capability of achievin…
Hot gas in Mach cones around Virgo Cluster spiral galaxies
M. Wezgowiec, B. Vollmer, M. Ehle +5
The detailed comparison between observations and simulations of ram pressure stripped spiral galaxies in the Virgo cluster has led to a three dimensional view of the galaxy orbits…
3D model of magnetic fields evolution in dwarf irregular galaxies
H. Siejkowski, M. Soida, K. Otmianowska-Mazur +2
Radio observations show that magnetic fields are present in dwarf irregular galaxies (dIrr) and its strength is comparable to that found in spiral galaxies. Slow rotation, weak she…
NGC 4654: polarized radio continuum emission as a diagnostic tool for a galaxy--cluster interaction
M. Soida, K. Otmianowska-Mazur, K. T. Chyży +1
A recent comparison between deep VLA HI observations and dynamical models of the Virgo cluster spiral galaxy NGC 4654 has shown that only a model involving a combination of a tidal…
The magnetic fields of large Virgo cluster spirals: Paper II
M. Wezgowiec, M. Urbanik, R. Beck +2
The Virgo cluster of galaxies provides excellent conditions for studying interactions of galaxies with the cluster environment. Both the high-velocity tidal interactions and effect…
Hot gas heating via magnetic arms in spiral galaxies. The case of M 83
M. Wezgowiec, M. Ehle, M. Soida +3
Reconnection heating has been considered as a potential source of the heating of the interstellar medium. In some galaxies, significant polarised radio emission has been found betw…
Radio continuum observations of the Leo Triplet at 2.64 GHz
B. Nikiel-WroczyÅski, M. Soida, M. Urbanik +4
Aims. The magnetic fields of the member galaxies NGC 3628 and NGC 3627 show morphological peculiarities, suggesting that interactions within the group may be caused by stripping of…
Intergalactic magnetic fields in Stephan's Quintet
B. Nikiel-WroczyÅski, M. Soida, M. Urbanik +2
We present results of the VLA radio continuum total power and polarised intensity observations of Stephan's Quintet at 1.43 and 4.86 GHz along with complementary 4.85 and 8.35 GHz…
3D MHD simulations of magnetic fields and radio polarization of barred galaxies
B. Kulesza-Å»ydzik, K. Kulpa-DybeÅ, K. Otmianowska-Mazur +2
We present results of three-dimensional, fully nonlinear MHD simulations of a large-scale magnetic field evolution in a barred galaxy. The model does not take into consideration th…
Deciphering the radio star formation correlation on kpc scales II. The integrated infrared-radio continuum and star formation - radio continuum correlations
B. Vollmer, M. Soida, J. Dallant
Given the multiple energy loss mechanisms of cosmic ray electrons in galaxies, the tightness of the infrared - radio continuum correlation is surprising. We extended the analytical…
Cosmic-ray driven dynamo in the interstellar medium of irregular galaxies
H. Siejkowski, M. Soida, K. Otmianowska-Mazur +2
Irregular galaxies are usually smaller and less massive than their spiral, S0, and elliptical counterparts. Radio observations indicate that a magnetic field is present in irregula…
The magnetic fields of large Virgo Cluster spirals
M. Wezgowiec, M. Urbanik, B. Vollmer +4
Because of its proximity the Virgo Cluster is an excellent target for studying interactions of galaxies with the cluster environment. Both the high-velocity tidal interactions and…
Tidal interaction vs. ram pressure stripping effects as seen in X-rays. Hot gas in group and cluster galaxies
M. Wezgowiec, D. J. Bomans, M. Ehle +4
The hot intracluster/intragroup medium (ICM/IGM) and a high galaxy density can lead to perturbations of the galactic interstellar medium (ISM) due to ram pressure and/or tidal inte…
A dynamical model for the heavily ram pressure stripped Virgo spiral galaxy NGC 4522
B. Vollmer, M. Soida, K. Otmianowska-Mazur +3
A dynamical model including ram pressure stripping is applied to the strongly HI deficient Virgo spiral galaxy NGC 4522. A carefully chosen model snapshot is compared with existing…
Megaparsec-scale Radio Structure Associated with a Hybrid Blazar SBS B1646+499: Episodic Jet Activity with Precessing Axis
U. Pajdosz-Smierciak, M. Jamrozy, M. Soida +1
Here we report on the total-intensity 610 MHz GMRT observations of the peculiar hybrid blazar SBS B1646+499, which merges the properties of BL Lacertae objects and flat-spectrum ra…
NGC 3627: a galaxy-dwarf collision?
M. Wezgowiec, M. Soida, D. J. Bomans
Group galaxies very often show distinct signs of interaction with both companion galaxies and the intragroup medium. X-ray observations are particularly helpful because they provid…
Large-scale magnetized outflows from the Virgo Cluster spiral NGC4569
K. T. Chyzy, M. Soida, D. J. Bomans +3
Using the Effelsberg radio telescope at 4.85GHz and 8.35 GHz we discovered large symmetric lobes of polarized radio emission around the strongly HI deficient Virgo cluster spiral g…
Predicting CO and dust emission of star-forming galaxies
B. Vollmer, J. Braine, M. Soida +1
How do Dwarf Galaxies differ from spirals? Does star formation produce radio and far-infrared emission in the same way as in spiral galaxies? Radio, FarIR, and CO emission depend o…
The sub-mm morphology of the interacting galaxy NGC 3627
M. Dumke, M. Krause, R. Beck +3
We present sub-mm continuum and heterodyne data of the interacting galaxy NGC 3627, obtained with the HHT and APEX. We find significant changes in the molecular line ratios over sm…
Magnetic fields and hot gas in M101
M. Wezgowiec, R. Beck, M. Hanasz +4
Studies of nearby spiral galaxies in radio and X-ray wavelengths reveal the structure and energy balance of the magnetic fields and the hot interstellar medium (ISM). In some spira…
CHANG-ES XXXIV: a 20 kpc radio bubble in the halo of the star-forming galaxy NGC 4217
V. Heesen, T. Wiegert, J. Irwin +11
Cosmic rays may be dynamically very important in driving large-scale galactic winds. Edge-on galaxies give us an outsider's view of the radio halo, which shows the presence of extr…
The characteristic polarized radio continuum distribution of cluster spiral galaxies
B. Vollmer, M. Soida, R. Beck +5
Deep observations of 6cm polarized radio continuum emission of 8 Virgo spiral galaxies are presented. All galaxies show strongly asymmetric distributions of polarized intensity wit…
Magnetic fields and ionized gas in nearby late type galaxies
K. T. Chyzy, D. J. Bomans, M. Krause +3
In order to analyze the importance of the star formation rate in generating and amplifying magnetic fields in the interstellar medium we obtained deep total power and polarization…
Shock location and CME 3D reconstruction of a solar type II radio burst with LOFAR
P. Zucca, D. E. Morosan, A. P. Rouillard +62
Type II radio bursts are evidence of shocks in the solar atmosphere and inner heliosphere that emit radio waves ranging from sub-meter to kilometer lengths. These shocks may be ass…
Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours
A. Goyal, L. Stawarz, S. Zola +109
We present the results of our power spectral density analysis for the BL Lac object OJ\,287, utilizing the {\it Fermi}-LAT survey at high-energy -rays, {\it Swift}-XRT in X-ray…
A search for extended radio emission from selected compact galaxy groups
B. Nikiel WroczyÅski, M. Urbanik, M. Soida +2
Context. Studies on compact galaxy groups have led to the conclusion that a plenitude of phenomena take place in between galaxies that form them. However, radio data on these objec…
Deciphering the radio-star formation correlation on kpc-scales III. Radio-dim and bright regions in spiral galaxies
B. Vollmer, M. Soida, R. Beck +1
The relation between the resolved star formation rate per unit area and the non-thermal radio continuum emission is studied in 21 Virgo cluster galaxies and the two nearby spiral g…
3D global simulations of a cosmic-ray-driven dynamo in dwarf galaxies
H. Siejkowski, K. Otmianowska-Mazur, M. Soida +2
Star-forming dwarf galaxies can be seen as the local proxies of the high-redshift building blocks of more massive galaxies according to the current paradigm of the hierarchical gal…
Magnetic Fields and Ionized Gas in the Local Group Irregular Galaxies IC10 and NGC6822
K. T. Chyzy, J. Knapik, D. J. Bomans +4
We performed a high-sensitivity search for galaxy-scale magnetic fields by radio polarimetry at 10.45GHz and 4.85GHz with the Effelsberg 100m radio telescope, accompanied by Halpha…
Cassiopeia A, Cygnus A, Taurus A, and Virgo A at ultra-low radio frequencies
F. de Gasperin, J. Vink, J. P. McKean +49
The four persistent radio sources in the northern sky with the highest flux density at metre wavelengths are Cassiopeia A, Cygnus A, Taurus A, and Virgo A; collectively they are ca…
Deciphering the radio-star formation correlation on kpc-scales I. Adaptive kernel smoothing experiments
B. Vollmer, M. Soida, R. Beck +1
(abridged) Within nearby galaxies, variations in the radio-FIR correlation have been observed, mainly because the cosmic ray electrons migrate before they lose their energy via syn…
Large-scale radio continuum properties of 19 Virgo cluster galaxies The influence of tidal interactions, ram pressure stripping, and accreting gas envelopes
B. Vollmer, M. Soida, R. Beck +5
Deep scaled array VLA 20 and 6cm observations including polarization of 19 Virgo spirals are presented. This sample contains 6 galaxies with a global minimum of 20cm polarized emis…
Hot magnetic halo of NGC628 (M74)
M. Wezgowiec, R. Beck, M. Hanasz +4
In several spiral galaxies that are observed face-on, large-scale ordered magnetic fields (the so-called magnetic arms) were found. One of the explanations was the action of the ma…
Magnetic fields and radio polarization of barred galaxies - 3D dynamo simulations
K. Otmianowska-Mazur, D. Elstner, M. Soida +1
A three-dimensional (3D) MHD model is applied to simulate the evolution of a large-scale magnetic field in a barred galaxy possessing a gaseous halo extending to about 2.8 kpc abov…
Unusual magnetic fields in the interacting spiral NGC 3627
M. Soida, M. Urbanik, R. Beck +2
By observing the interacting galaxy NGC 3627 in radio polarization we try to answer the question to which degree the magnetic field follows the galactic gas flows. We obtained tota…
Ram pressure stripping of the multiphase ISM and star formation in the Virgo spiral galaxy NGC 4330
B. Vollmer, M. Soida, J. Braine +6
It has been shown that the Virgo spiral galaxy NGC 4330 shows signs of ongoing ram pressure stripping in multiple wavelengths: at the leading edge of the interaction, the Halpha an…
The thermal and non-thermal gaseous halo of NGC5775
R. Tuellmann, R. -J. Dettmar, M. Soida +2
In this letter we present first results from spectroscopic observations of Diffuse Ionized Gas (DIG) in the halo of NGC5775 obtained with FORS1 attached to UT1/Antu of the Very Lar…
Predicting HCN, HCO, multi-transition CO, and dust emission of star-forming galaxies -- Extension to luminous infrared galaxies and the role of cosmic ray ionization
B. Vollmer, J. Freundlich, P. Gratier +4
The specific star-formation rate of star-forming `main sequence' galaxies significantly decreased since z~1.5, due to the decreasing molecular gas fraction and star formation effic…
Probing the magnetic field of the nearby galaxy pair Arp 269
B. Nikiel-WroczyÅski, M. Jamrozy, M. Soida +2
We present a multiwavelength radio study of the nearby galaxy pair Arp 269 (NGC 4490/85). High sensitivity to extended structures gained by using the merged interferometric and sin…
Formation of gaseous arms in barred galaxies with dynamically important magnetic field : 3D MHD simulations
B. Kulesza-Zydzik, K. Kulpa-Dybel, K. Otmianowska-Mazur +2
We present results of three-dimensional nonlinear MHD simulations of a large-scale magnetic field and its evolution inside a barred galaxy with the back reaction of the magnetic fi…