J. J. Harwood

Environmental, resident and bystander exposure from spraying applications with unmanned aerial vehicles equipped with flat-fan nozzles or rotary atomizers

Pierre‐Henri Dubuis, Céline Villars-Corbex, M. Clare Butler Ellis, H. Christoph Geiser et autres

ABSTRACT Adoption of agricultural unmanned aerial vehicles (UAVs) for spraying plant protection products has proceeded at a rapid pace. A trend towards usage of UAV sprayers fitted with rotary atomizers has been noted. Regarding the risks associated with UAV-based plant protection treatments, …

ch, gb (code pays fourni par la source)

Field measurement of spray drift from a spray application by UAV

M. C. B. Ellis, Andrew G. Lane, Christine M. O'Sullivan, Helen C. Wheeler et autres

BACKGROUND: To use unmanned aerial vehicles (UAVs) to deliver pesticides, new data are needed to allow regulators to conduct risk assessments. A field trial was conducted to obtain spray drift data relating to ground deposits and airborne spray resulting from a spray …

gb (code pays fourni par la source)

Spectral age distribution for radio-loud active galaxies in the XMM-LSS field

Siddhant Pinjarkar, M. J. Hardcastle, J. J. Harwood, Dharam Vir Lal et autres

ABSTRACT Jets of energetic particles, as seen in FR type-I and FR type-II sources, ejected from the centre of radio-loud AGN affect the sources surrounding the intracluster medium/intergalactic medium. Placing constraints on the age of such sources is important in order to …

gb, in, Afrique du Sud, Madagascar (code pays fourni par la source)

Spectral age distribution for radio-loud active galaxies in the XMM-LSS field

Siddhant Pinjarkar, M. J. Hardcastle, J. J. Harwood, Dharam Vir Lal et autres

Jets of energetic particles, as seen in FR type-I and FR type-II sources, ejected from the center of Radio-Loud AGN affect the sources surrounding intracluster medium/intergalactic medium. Placing constraints on the age of such sources is important in order to measure the …

The Host Galaxies of Hybrid Morphology Radio Sources

Andra Stroe, Victoria E. Catlett, J. J. Harwood, Tessa Vernstrom et autres

Abstract Based on their differing radio morphologies, powerful radio galaxies can be separated into the Fanaroff–Riley I (FR I) and II (FR II) classes. Hybrid morphology radio sources (HyMoRS) contain morphologies consistent with each type of jet on either side: a powerful, …

us, gb, au (code pays fourni par la source)

The Host Galaxies of Hybrid Morphology Radio Sources

Andra Stroe, Victoria E. Catlett, J. J. Harwood, Tessa Vernstrom et autres

Based on their differing radio morphologies, powerful radio galaxies can be separated into the Fanaroff-Riley I (FR-I) and II (FR-II) classes. Hybrid morphology radio sources (HyMoRS) contain morphologies consistent with each type of jet on either side: a powerful, highly relativistic FR-II-like …

Subarcsecond view on the high-redshift blazar GB 1508+5714 by the International LOFAR Telescope

A. Kappes, P. R. Burd, M. Kadler, G. Ghisellini et autres

Context. Studies of the most distant active galactic nuclei (AGNs) allow us to test our current understanding of the physics present in radio-jetted AGNs across a range of environments, and probe their interactions with these environments. The decrease in apparent luminosity with …

de, it, es, us, gb (code pays fourni par la source)

The resolved jet of 3C 273 at 150 MHz

J. J. Harwood, S. Mooney, Leah K. Morabito, J. Quinn et autres

Context.Since its discovery in 1963, 3C 273 has become one of the most widely studied quasars with investigations spanning the electromagnetic spectrum. While much has therefore been discovered about this historically notable source, its low-frequency emission is far less well understood. Observations …

gb, ie, nl, it, de, es (code pays fourni par la source)

Spectral analysis of spatially resolved 3C295 (sub-arcsecond resolution) with the International LOFAR Telescope

E. Bonnassieux, Frits Sweijen, M. Brienza, K. Rajpurohit et autres

3C295 is a bright, compact steep spectrum source with a well-studied integrated radio spectral energy distribution (SED) from 132 MHz to 15 GHz. However, spatially resolved spectral studies have been limited due to a lack of high resolution images at low radio …

it, nl, de, au, gb, fr (code pays fourni par la source)

The resolved jet of 3C 273 at 150 MHz : Sub-arcsecond imaging with the LOFAR international baselines

J. J. Harwood, S. Mooney, Leah K. Morabito, J. Quinn et autres

Context. Since its discovery in 1963, 3C 273 has become one of the most widely studied quasars with investigations spanning the electromagnetic spectrum. While much has therefore been discovered about this historically notable source, its low-frequency emission is far less well understood. …

gb, ie, nl, it, de, es (code pays fourni par la source)

Investigating the spectra and physical nature of galaxy scale jets

B. Webster, Judith H. Croston, J. J. Harwood, Ranieri Diego Baldi et autres

ABSTRACT Previous studies have shown that physically small, low-luminosity radio galaxies, which we refer to as galaxy scale jets (GSJ), could potentially have a significant effect upon the host galaxy’s evolution. Using 6-arcsec resolution images taken from the first release of the …

gb, it, nl (code pays fourni par la source)

Spectral analysis of spatially resolved 3C295 (sub-arcsecond resolution) with the International LOFAR Telescope

E. Bonnassieux, Frits Sweijen, M. Brienza, K. Rajpurohit et autres

3C295 is a bright, compact steep spectrum source with a well-studied integrated radio spectral energy distribution (SED) from 132 MHz to 15 GHz. However, spatially resolved spectral studies have been limited due to a lack of high resolution images at low radio …

it, nl, de, au, gb, fr (code pays fourni par la source)