A5044060153- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Soft tissue tumor case studies
- Geometric Analysis and Curvature Flows
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Pulsars and Gravitational Waves Research
- Superconducting Materials and Applications
- Astrophysics and Star Formation Studies
- Geomagnetism and Paleomagnetism Studies
- Scientific Research and Discoveries
- Superconducting and THz Device Technology
Max Planck Institute for Radio Astronomy
2016-2024
Instituto de Astrofísica de Andalucía
2019-2022
Queen's University
2019
Max Planck Society
2015
We study the spectral energy distribution (SED) of radio continuum emission from KINGFISH sample nearby galaxies to understand energetics and origin this emission. Effelsberg multi-wavelength observations at 1.4GHz, 4.8GHz, 8.5GHz, 10.5GHz combined with archive data allow us, for first time, determine mid-radio (1-10 GHz, MRC) bolometric luminosities further present calibration relations vs. monochromatic luminosities. The 1-10 GHz SED is fitted using a Bayesian Markov Chain Monte Carlo...
We present the first part of observations made for Continuum Halos in Nearby Galaxies, an EVLA Survey (CHANG-ES) project. The aim CHANG-ES project is to study and characterize nature radio halos, their prevalence as well magnetic fields, cosmic rays illuminating these fields. This paper reports with compact D configuration Karl G. Jansky Very Large Array (VLA) sample 35 nearby edge-on galaxies CHANG-ES. With new wide bandwidth capabilities VLA, unprecedented sensitivity was achieved all...
Galactic plane radio surveys play a key role in improving our understanding of wide range astrophysical phenomena. Performing such survey using the latest interferometric telescopes produces large data rates necessitating shift towards fully or quasi-real-time analysis with being stored for only time required to process them. We present here overview and setup 3000 hour Max-Planck-Institut fuer Radioastronomie (MPIfR) MeerKAT Plane (MMGPS). The is unique by operating commensal mode,...
The vertical halo scale height is a crucial parameter to understand the transport of cosmic-ray electrons (CRE) and their energy loss mechanisms in spiral galaxies. Until now, radio could only be determined for few edge-on galaxies because missing sensitivity at high resolution. We developed sophisticated method determination With this we heights radial lengths sample 13 from CHANG-ES continuum survey two frequency bands. average value are 1.1 +/- 0.3kpc C-band 1.4 0.7kpc L-band. From...
The Square Kilometre Array (SKA) will answer fundamental questions about the origin, evolution, properties, and influence of magnetic fields throughout Universe. Magnetic can illuminate phenomena as diverse star formation, galactic dynamics, fast radio bursts, active nuclei, large-scale structure, dark matter annihilation. Preparations for SKA are swiftly continuing worldwide, community is making tremendous observational progress in field cosmic magnetism using data from a powerful...
Context. The magnetic field in spiral galaxies is known to have a large-scale structure along the galactic disk and observed as X-shaped halo of some galaxies. While can be well explained by dynamo action, 3-dimensional its physical nature still unclear. Aims. As first steps towards understanding fields, we want clarify whether wide-spread pattern halos these fields are just turbulent ordered compression or shear (anisotropic fields), regular structure. Methods. analysis Faraday rotation...
We investigate the effects of ram pressure on ordered magnetic field a galaxy hosting radio halo and strong nuclear outflows. New images in total polarized intensity edge-on Virgo NGC\,4388 were obtained within CHANG-ES EVLA project. The unprecedented noise level reached allows us to detect striking new features field. outflow extends far into about 5\,kpc from center is spatially correlated with $\rm{H}\alpha$ X-ray emission. For first time, southern detected. Above below both spiral arms...
We report on C-band (5 -7 GHz) observations of the galaxy, NGC 2992, from CHANG-ES sample.This galaxy displays an embedded nuclear double-lobed radio morphology within its spiral disk, as revealed in linearly polarized emission but not total intensity emission.The lobes are kpc-sized, similar to what has been observed past for other Seyfert galaxies, and show ordered magnetic fields.NGC 2992 shown previous evidence AGN-related activity, features that we present here.We draw attention this...
Abstract The CHANG-ES galaxy sample consists of 35 nearby edge-on galaxies that have been observed using the VLA at 1.6 and 6.0 GHz. Here we present third data release our sample, namely, B configuration GHz sample. In addition, make available band-to-band spectral index maps between GHz, latter taken in matching resolution C configuration. images can be downloaded from https://www.queensu.ca/changes . These are highest-resolution (≈3″), examine possible presence low-luminosity active...
We present new radio continuum images of the edge-on starburst galaxy NGC 5775, from LOFAR (140 MHz) and Karl G. Jansky Very Large Array CHANG-ES survey (1500 MHz). trace non-thermal halo up to 13 kpc disc, measuring spectral index estimating total equipartition magnetic field strength ($\approx13\mu$G in disc $\approx7\mu$G above plane). The has a similar extent at both frequencies, displays evidence for localized cosmic ray streaming coinciding with prominent H$\alpha$ filaments vertical...
Using images from Sloan Digital Sky Survey Data Release 8, we have re-examined the morphology of 719 galaxies Analysis interstellar Medium in Isolated GAlaxies (AMIGA) project, a sample consisting most isolated that yet been identified. The goal is to further improve classifications these by examining them context Comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS) system, which includes recognition features go beyond original point view. Our results confirm previous findings are...
The CHANG-ES (Continuum Halos in Nearby Galaxies) survey of 35 nearby edge-on galaxies is revealing new and sometimes unexpected startling results their radio continuum emission. observations were wide bandwidths centred at 1.6 6.0 GHz. Unique to this full polarization data showing magnetic field structures unprecedented detail, resolution sensitivity for such a large sample. A range are reported here, some never before seen any galaxy. We see circular variability active galactic nuclei...
Abstract We report the discoveries of a nuclear ring diameter 10″ (∼1.5 kpc) and potential low-luminosity active galactic nucleus (LLAGN) in radio continuum emission map edge-on barred spiral galaxy NGC 5792. These are based on Continuum Halos Nearby Galaxies—an Expanded Very Large Array (VLA) Survey, as well subsequent VLA observations subarcsecond resolution. Using mixture H α 24 μ m calibrations, we disentangle thermal nonthermal region derive star formation rate (SFR) ∼0.4 M ☉ yr −1 ....
The S -band Polarisation All Sky Survey (SPASS/ATCA) rotation measure (RM) catalogue is the largest broadband RM to date, increasing density in sparse southern sky. Through analysis of this catalogue, we report a latitude dependency Faraday complexity polarised sources within 10° Galactic plane towards inner Galaxy. In study, aim investigate trend with follow-up observations using Australia Telescope Compact Array (ATCA). We observe 95 from SPASS/ATCA at 1.1–3.1 GHz ATCA’s 6 km...
We detect five galaxies in the Continuum Halos Nearby Galaxies – an EVLA Survey (CHANG-ES) sample that show circular polarization (CP) at L band our high-resolution data sets. Two of (NGC 4388 and NGC 4845) strong Stokes V/I ≡ mC ∼ 2 per cent, two 660 3628) have values 0.3 3079 is a marginal detection 0.2 cent. The strongest also most luminous X-ray cores internal absorption X-rays. expanded on previous Faraday conversion interpretation analysis provide analytical expressions for expected V...
Context. Hickson Compact Group (HCG) 16 is a prototypical compact group of galaxies in an intermediate stage the previously proposed evolutionary sequence, where its are losing gas to intra-group medium (IGrM). The hosts that H I -normal, -poor, and centrally active with both AGNs starbursts, addition likely new member tidal feature ∼160 kpc length. Despite being well-studied at all wavelengths, no previous study HCG has focused on extraordinary component. Aims. characteristics make it ideal...
AGN bubbles could play an important role in accelerating high-energy CRs and galactic feedback. Only nearby galaxies we have high enough angular resolution multi-wavelengths to study the sub-kpc environment of AGN, where are produced strongly interact with surrounding ISM. In this paper, present latest Chandra observations Virgo cluster galaxy NGC 4438, which hosts multi-scale detected various bands. The also has low current star formation activity, so these evidently by rather than a...
Abstract We present the first widefield extragalactic continuum catalogue with MeerKAT S-band (2.5 GHz), of radio-selected DEEP2 field. The combined image over S1 (1.96 – 2.84 GHz) and S4 (2.62 3.50 sub-bands has an angular resolution 6.8”×3.6” (4.0”×2.4”) at a robust weighting R = 0.3 (R −0.5) sensitivity 4.7 (7.5) µJy beam−1 on-source integration time 70 minutes minimum 52 64 antennas, for respective observations. differential source counts this field, as well morphological comparison...
The S-band Polarisation All Sky Survey (SPASS/ATCA) rotation measure (RM) catalogue is the largest broadband RM to date, increasing density in sparse southern sky. Through analysis of this catalogue, we report a latitude dependency Faraday complexity polarised sources within 10$^\circ$ Galactic plane towards inner Galaxy. In study, aim investigate trend with follow-up observations using Australia Telescope Compact Array (ATCA). We observe 95 from SPASS/ATCA at 1.1 - 3.1 GHz ATCA's 6 km...
The Square Kilometre Array (SKA) will answer fundamental questions about the origin, evolution, properties, and influence of magnetic fields throughout Universe. Magnetic can illuminate phenomena as diverse star formation, galactic dynamics, fast radio bursts, active nuclei, large-scale structure, Dark Matter annihilation. Preparations for SKA are swiftly continuing worldwide, community is making tremendous observational progress in field cosmic magnetism using data from a powerful...