A5047402535- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Gamma-ray bursts and supernovae
- Relativity and Gravitational Theory
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Geophysical and Geoelectrical Methods
- Magnetic and Electromagnetic Effects
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
Rudjer Boskovic Institute
2021-2024
University of Zagreb
2017-2021
Based on a sample of over 1800 radio AGN at redshifts out to z ~ 5, which have typical stellar masses within ~3 × (1010 − 1011)M⊙, and 3 GHz data in the COSMOS field, we derived 1.4 luminosity functions for (L1.4 GHz~ 1022 1027 W Hz-1) 5. We constrained evolution this population via continuous models pure density evolutions, found best-fit parametrizations Φ∗ ∝ (1 + z)(2.00 ± 0.18) (0.60 0.14)z, L∗ z)(2.88 0.82) (0.84 0.34)z, respectively, with turnover number densities ≈ 1.5. converted...
We study a sample of 1,604 moderate-to-high radiative luminosity active galactic nuclei (HLAGN) selected at 3 GHz within the VLA-COSMOS Large Project. These were classified by combining multiple AGN diagnostics: X-ray data, mid-infrared data and broad-band spectral energy distribution fitting. decompose total radio 1.4 ($\mathrm{L_{1.4\ GHz,TOT}}$) into emission originating from star formation activity measuring excess in $\mathrm{L_{1.4\ GHz,TOT}}$ relative to infrared-radio correlation...
($ABRIDGED$) We probe the physical properties and large-scale environment of radio AGN in faintest FR population to-date, link them to their structure. use VLA-COSMOS Large Project at 3 GHz, with resolution sensitivity 0".75 2.3 $\mu$Jy/beam, respectively, explore dichotomy down $\mu$Jy levels. classify objects as FRIs, FRIIs or hybrid FRI/FRII based on surface-brightness distribution along Our control sample is jet-less/compact (COM AGN) which show excess emission GHz exceeding what coming...
Observations of synchrotron emission at low radio frequencies reveal a labyrinth polarised Galactic structures. However, the explanation for wealth structures remains uncertain due to complex interactions between interstellar medium and magnetic field. A multi-tracer approach analysis large sky areas is needed. This paper aims use polarimetric images from LOFAR Two metre Sky Survey (LoTSS) produce biggest mosaic in northern (150 MHz) date. The area this covers allows detailed morphological...
Context . We conducted a follow-up study on the analysis of LOw Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) mosaic in high-latitude outer Galaxy presented first paper this series. Here, we focus search for alignment between magnetic field traced by dust, HI filaments, starlight optical linear polarisation, and depolarised structures (depolarisation canals) observed low-frequency synchrotron polarisation. This was previously found several smaller fields with LOFAR, offering valuable...
Faraday tomography of a field centred on the extragalactic point source 3C 196 with LOw Frequency ARray (LOFAR) revealed an intertwined structure diffuse polarised emission straight depolarisation canals and tracers magnetized multi-phase interstellar medium (ISM), such as dust line from atomic hydrogen (HI). This study aims at extending multi-tracer analysis LOFAR data to three additional fields in surroundings field. For first time, we three-dimensional by determining distance canals. We...
Faraday tomography of radio polarimetric data below 200 MHz from LOFAR are providing us with a new perspective on the diffuse and magnetized interstellar medium (ISM). Of particular interest is discovery Faraday-rotated synchrotron polarization associated neutral gas, as traced by atomic hydrogen (HI) dust. Here we present first in-depth numerical study these results. We produce analyze comprehensive synthetic observations low-frequency MHD simulations colliding super shells in multiphase...
Mapping the average AGN luminosity across galaxy populations and over time encapsulates important clues on interplay between supermassive black hole (SMBH) growth. This paper presents demography, mean power cosmic evolution of radio star-forming galaxies (SFGs) different stellar masses (${M_{*}}$). We exploit deep VLA-COSMOS 3 GHz data to build rest-frame 1.4 functions at 0.1$\leq$$z$$\leq$4.5 hosted in SFGs. Splitting function into ${M_{*}}$ bins reveals that, all redshifts, are both more...
We present the first deep polarimetric study of Galactic synchrotron emission at low radio frequencies. Our is based on 21 observations European Large Area Infrared Space Observatory Survey-North 1 (ELAIS-N1) field using Low-Frequency Array (LOFAR) frequencies from 114.9 to 177.4 MHz. These data are a part LOFAR Two-metre Sky Survey Deep Fields Data Release 1. used very low-resolution ($4.3'$) Stokes QU cubes this release. applied rotation measure (RM) synthesis decompose distribution...
Context. As the Square Kilometer Array (SKA) is expected to be operational in next decade, investigations of radio sky range 100 MHz–10 GHz have become important for simulating SKA observations. In determining physical properties galaxies from data, spectral energy distribution (SED) often assumed described by a simple power law, usually with index 0.7 all sources. Even though SEDs been shown exhibit deviations this assumption, both differing indices and complex shapes, it presumed that...
We studied a sample of 274 radio and X-ray selected quasars (XQSOs) detected in the COSMOS XXL-S surveys at 3 GHz 2.1 GHz, respectively. This was identified by adopting conservative threshold luminosity, L X [2−10 keV] ≥ 10 44 erg s −1 , selecting only most powerful quasars. A number previous studies on origin emission type-1 have focused loudness distributions, some claiming to found evidence for bimodality, pointing toward existence two physically different mechanisms emission. Using...
We study the space density evolution of active galactic nuclei (AGN) using 610 MHz radio survey XXL-North field, performed with Giant Metrewave Radio Telescope. The covers an area 30.4 deg 2 , a beamsize 6.5 arcsec. is divided into two parts, one covering 11.9 1 σ rms noise 200 μ Jy beam −1 and other spanning 18.5 45 . extracted catalog components above 7 was cross-matched multi-wavelength field (covering about 80% field) likelihood ratio method, which determines counterparts based on their...
We conducted a follow-up study on the analysis of LOw Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) mosaic in high-latitude outer Galaxy presented first paper this series. Here, we focus search for alignment between magnetic field traced by dust, HI filaments, starlight optical linear polarisation, and depolarised structures (depolarisation canals) observed low-frequency synchrotron polarisation. This was previously found several smaller fields with LOFAR, offering valuable insights...
Abstract We study the moderate-to-high radiative luminosity active galactic nuclei (HLAGN) within VLA-COSMOS 3 GHz Large Project. The survey covers 2.6 square degrees centered on COSMOS field with a 1σ sensitivity of 2.3 μJy/beam across field. This provides simultaneously largest and deepest radio continuum available to date exquisite multi-wavelength coverage. yields 10,830 sources signal-to-noise ratios ≥5. A subsample 1,604 HLAGN is analyzed here. These were selected via combination X-ray...
We present the first deep polarimetric study of Galactic synchrotron emission at low radio frequencies. Our is based on 21 observations European Large Area Infrared Space Observatory Survey-North 1 (ELAIS-N1) field using Low-Frequency Array (LOFAR) frequencies from 114.9 to 177.4 MHz. These data are a part LOFAR Two-metre Sky Survey Deep Fields Data Release 1. used very low-resolution ($4.3'$) Stokes QU cubes this release. applied rotation measure (RM) synthesis decompose distribution...
Mapping the average AGN luminosity across galaxy populations and over time encapsulates important clues on interplay between supermassive black hole (SMBH) growth. This paper presents demography, mean power cosmic evolution of radio star-forming galaxies (SFGs) different stellar masses (${M_{*}}$). We exploit deep VLA-COSMOS 3 GHz data to build rest-frame 1.4 functions at 0.1$\leq$$z$$\leq$4.5 hosted in SFGs. Splitting function into ${M_{*}}$ bins reveals that, all redshifts, are both more...