A5074957177- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Planetary Science and Exploration
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- Advanced Antenna and Metasurface Technologies
- Gyrotron and Vacuum Electronics Research
- Astronomical Observations and Instrumentation
- Antenna Design and Analysis
- Energy Harvesting in Wireless Networks
- Adaptive optics and wavefront sensing
- Space Exploration and Technology
- Geophysics and Gravity Measurements
- Particle Accelerators and Free-Electron Lasers
- Real-time simulation and control systems
- Astro and Planetary Science
- Multidisciplinary Science and Engineering Research
- Neutrino Physics Research
- Plant Water Relations and Carbon Dynamics
Konkoly Observatory
2022-2024
Research Centre for Astronomy and Earth Sciences
2022-2024
Chalmers University of Technology
2014-2022
Joint Institute for VLBI ERIC
2015
Delft University of Technology
2015
Eötvös Loránd University
2013
The energy released by an active galactic nucleus (AGN) has a strong impact on the surrounding interstellar medium (ISM). This feedback is considered to be regulating factor for growth of central massive black hole, and rate star formation in galaxy. We have located, using Very Long Baseline Interferometry (VLBI), fast outflow neutral hydrogen young, restarted radio loud AGN 4C12.50. located 100 pc from where jet interacts with ISM, as well around associated lobe. These observations show...
Compact radio sources, radio-emitting active galactic nuclei, are scarce objects, yet important as reference points for astrometric, astrophysical, and spacecraft navigation applications. We present over 3900 potential new compact sources derived from a cross- match between the Very Large Array Sky Survey (VLASS) catalogue recently published Quaia quasar catalogue. The VLASS provides list of individual identified at 3 GHz with flux densities ~ 1 mJy, while is Gaia optical astrometric by...
Abstract The extremely high-redshift (z = 5.3) radio source SDSS J102623.61+254259.5 (J1026+2542) is among the most distant and luminous radio-loud active galactic nuclei (AGN) known to date. Its one-sided jet structure on milliarcsecond (mas) ∼10-mas scales typical for blazars was first imaged at 5 GHz with very long baseline interferometry (VLBI) in 2006. Here we report our dual-frequency (1.7 GHz) imaging observations performed European VLBI Network (EVN) 2013. prominent allows us...
We report the results of a pilot study CO$(4-3)$ emission line three {\it WISE}-selected hyper-luminous, dust-obscured quasars (QSOs) with sensitive ALMA Band 3 observations. These obscured QSOs $L_{\rm bol}>10^{14}L_\odot$ are among most luminous objects in universe. All QSO hosts clearly detected both continuum and line. Based on detection, we derive molecular gas masses ($\sim 10^{10-11}$ M$_\odot$), suggesting that these gas-rich systems. find our sample follow similar $L'_{\rm CO}-...
Based on its broad-band spectral energy distribution, and the X-ray spectrum in particular, radio-loud active galactic nucleus (AGN) SDSS J102623.61+254259.5 (J1026+2542) has recently been classified as a blazar. The extremely high redshift of source, z = 5.3, makes it one most distant luminous AGN known to date. From published 5-GHz very long baseline interferometry (VLBI) imaging data obtained 2006, source typical blazar appearance mas scales, with prominent one-sided jet extending ∼20...
ABSTRACT The gas content of galaxies is a key factor for their growth, starting from star formation and black hole accretion to galaxy mergers. Thus, characterizing its properties through observations tracers like the CO emission line big importance in order understand bigger picture evolution. We present Atacama Large Millimeter/submillimeter Array (ALMA) dust continuum, CO(5–4) CO(8–7) quasar–star-forming companion system SMM J04135+10277 (z = 2.84). Earlier low-J studies this found huge...
(Abridged) In the last decade several massive molecular gas reservoirs were found <100 kpc distance from active galactic nuclei (AGNs), residing in gas-rich companion galaxies. The study of AGN-gas-rich systems opens opportunity to determine whether stellar mass local galaxies was formed their host after a merger event or outside galaxy close starbursting and later incorporated via mergers. We quasar-companion system SMM J04135+10277 (z=2.84) investigate expected frequency quasar-starburst...
We present CO(1–0) observations of the high-redshift quasar SDSS J160705+533558 ( z = 3.653) using Karl G. Jansky Very Large Array (VLA). detect CO emission associated with and at ∼16.8 kpc projected distance from it, separated by ∼800 km s −1 in velocity. The total molecular gas mass this system is ∼5 × 10 M ⊙ . By comparing our detections previous submillimetre (submm) source, an offset between different components revealed: peak submm companion detected VLA data. To explain findings, we...
The existence of accreting supermassive black holes up to billions solar masses at early cosmological epochs (in the context this work, redshifts $z 6$) requires very fast growth rates that are challenging explain. presence a relativistic jet can be direct indication activity and accretion status in active galactic nuclei (AGN), constraining radiative properties these extreme objects. However, known jetted AGN beyond still rare. radio-emitting J2331$+$1129 has recently been claimed as...
We present an overview of the operations and engineering interface for Planetary Radio Interferometry Doppler Experiment (PRIDE) radio astronomy observations as a scientific component ESA s Jupiter Icy Moons Explorer (JUICE) mission, well other prospective planetary space science missions. The article discusses advanced scheduling planning methods that make it possible to create observing schedules specific spacecraft in concurrence with natural sources. In order put this into practice find...
To investigate the radio properties of recently found high-redshift population, we collected a sample $919$ little red dots (LRDs) from literature. By cross-matching their co-ordinates with catalogues based on first- and second-epoch observations Very Large Array Sky Survey (VLASS) Faint Images Radio at Twenty-centimeters (FIRST) survey, no counterparts coinciding any LRDs. uncover possible sub-milli-Jansky-level weak emission, performed mean median image stacking analyses empty-field `quick...
The prominent radio quasar PKS 2215+020 (J2217+0220) was once labelled as a new laboratory for core–jet physics at redshift z=3.572 because of its exceptionally extended jet structure traceable with very long baseline interferometric (VLBI) observations up to ∼600 pc projected distance from the compact core and hint an arcsec-scale X-ray jet. While presence could not be confirmed later, this active galactic nucleus is still unique high VLBI Here, we analyse archival multi-epoch imaging data...
To investigate the radio properties of recently found high-redshift population, we collected a sample $919$ little red dots (LRDs) from literature. By cross-matching their coordinates with catalogues based on first- and second-epoch observations Very Large Array Sky Survey (VLASS) Faint Images Radio at Twenty-centimeters (FIRST) survey, no counterparts coinciding any LRDs. uncover possible sub-mJy level weak emission, performed mean median image stacking analyses empty-field 'Quick Look'...
Both theoretical and observational results suggest that high-redshift radio galaxies (HzRGs) inhabit overdense regions of the universe might be progenitors local, massive residing in centre galaxy clusters. In this paper we present CO(3-2) line observations HzRG TXS 0828+193 (z=2.57) its environment using Atacama Large Millimeter/submillimeter Array. contrast to previous observations, detect CO emission associated with derive a molecular gas mass $(0.9\pm0.3)\times10^{10}\,\rm M_{\odot}$....
The radio-loud AGN J1026+2542 has recently been classified as the second most distant blazar, based on its broad-band spectral energy distribution and X-ray spectrum.The source with a prominent one-sided jet extending to at least ∼20 mas was earlier observed VLBA 5 GHz in January 2006.With our new EVN observation (May 2013), we detected displacement directly measured apparent proper motion of components, for first time such high redshift.The 1.6-GHz provided additional information extent...
Planetary Radio Interferometry and Doppler Experiment (PRIDE) is a multi-purpose experimental technique aimed at enhancing the science return of planetary missions. The exploits payload spacecraft service systems without requiring dedicated onboard instrumentation or imposing on existing any special for PRIDE requirements. based near-field phase-referencing Very Long Baseline (VLBI) evaluation shift radio signal transmitted by observing it with multiple Earth-based telescopes. methodology...
The existence of accreting supermassive black holes up to billions solar masses at early cosmological epochs (in the context this work, redshifts z>=6) requires very fast growth rates which is challenging explain. presence a relativistic jet can be direct indication activity and accretion status in active galactic nuclei (AGN), constraining radiative properties these extreme objects. However, known jetted AGN beyond z~6 are still rare. radio-emitting J2331+1129 has recently been claimed as...