Search Results - "Godfrey, Leith"

The duty cycle of radio galaxies revealed by LOFAR: remnant and restarted radio source populations in the Lockman Hole by Shabala, Stanislav S, Jurlin, Nika, Morganti, Raffaella, Brienza, Marisa, Hardcastle, Martin J, Godfrey, Leith E H, Krause, Martin G H, Turner, Ross J

“…ABSTRACT Feedback from radio jets associated with active galactic nuclei (AGNs) plays a profound role in the evolution of galaxies. Kinetic power of these…”
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The Cocoon Shocks of Cygnus A: Pressures and Their Implications for the Jets and Lobes by Snios, Bradford, Nulsen, Paul E. J., Wise, Michael W., de Vries, Martijn, Birkinshaw, Mark, Worrall, Diana M., Duffy, Ryan T., Kraft, Ralph P., McNamara, Brian R., Carilli, Chris, Croston, Judith H., Edge, Alastair C., Godfrey, Leith E. H., Hardcastle, Martin J., Harris, Daniel E., Laing, Robert A., Mathews, William G., McKean, John P., Perley, Richard A., Rafferty, David A., Young, Andrew J.

“…We use 2.0 Msec of Chandra observations to investigate the cocoon shocks of Cygnus A and some implications for its lobes and jet. Measured shock Mach numbers…”
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On the efficiency of jet production in FR II radio galaxies and quasars by Rusinek, Katarzyna, Sikora, Marek, Koziel-Wierzbowska, Dorota, Godfrey, Leith

“…Jet powers in many radio galaxies with extended radio structures appear to exceed their associated accretion luminosities. In systems with very low accretion…”
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RULING OUT IC/CMB X-RAYS IN PKS 0637-752 AND THE IMPLICATIONS FOR TEV EMISSION FROM LARGE-SCALE QUASAR JETS by Meyer, Eileen T., Georganopoulos, Markos, Sparks, William B., Godfrey, Leith, Lovell, James E. J., Perlman, Eric

“…ABSTRACT The Chandra X-ray observatory has discovered dozens of resolved, kiloparsec-scale jets associated with powerful quasars in which the X-ray fluxes are…”
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A Damped Lyα Absorption-Line System in an Apparent Void at Redshift 2.38 by Godfrey, Leith E. H., Francis, Paul J.

“…We study the contents of an apparent void in the distribution of Lyα emitting galaxies at redshift 2.38. We show that this void is not empty, but contains a…”
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FR II radio galaxies at low frequencies – I. Morphology, magnetic field strength and energetics by Harwood, Jeremy J., Croston, Judith H., Intema, Huib T., Stewart, Adam J., Ineson, Judith, Hardcastle, Martin J., Godfrey, Leith, Best, Philip, Brienza, Marisa, Heesen, Volker, Mahony, Elizabeth K., Morganti, Raffaella, Murgia, Matteo, Orrú, Emanuela, Röttgering, Huub, Shulevski, Aleksandar, Wise, Michael W.

“…Due to their steep spectra, low-frequency observations of Fanaroff–Riley type II (FR II) radio galaxies potentially provide key insights in to the morphology,…”
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The Cocoon Shocks of Cygnus A: Pressures and Their Implications for the Jets and Lobes by Snios, Bradford, Nulsen, Paul E. J, Wise, Michael W, de Vries, Martijn, Birkinshaw, Mark, Worrall, Diana M, Duffy, Ryan T, Kraft, Ralph P, McNamara, Brian R, Carilli, Chris, Croston, Judith H, Edge, Alastair C, Godfrey, Leith E. H, Hardcastle, Martin J, Harris, Daniel E, Laing, Robert A, Mathews, William G, McKean, John P, Perley, Richard A, Rafferty, David A, Young, Andrew J

“…We use 2.0 Msec of Chandra observations to investigate the cocoon shocks of Cygnus A and some implications for its lobes and jet. Measured shock Mach numbers…”
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Changes in ion fluxes during phototropic bending of etiolated oat coleoptiles by Babourina, O, Godfrey, L, Voltchanskii, K

“…Background and Aims This work has been conducted to assist theoretical modelling of the different stages of the blue light (BL)-induced phototropic signalling…”
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The duty cycle of radio galaxies revealed by LOFAR: remnant and restarted radio source populations in the Lockman Hole by Shabala, Stanislav, Jurlin, Nika, Morganti, Raffaella, Brienza, Marisa, Hardcastle, Martin, Godfrey, Leith, Krause, Martin, Turner, Ross

“…Feedback from radio jets associated with Active Galactic Nuclei (AGN) plays a profound role in the evolution of galaxies. Kinetic power of these radio jets…”
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Size dependence of the radio luminosity - mechanical power correlation in radio galaxies by Shabala, Stanislav, Godfrey, Leith

“…We examine the relationship between source radio luminosity and kinetic power in Active Galactic Nucleus (AGN) jets. We show that neglecting various loss…”
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On the efficiency of jet production in FR II radio galaxies and quasars by Rusinek, Katarzyna, Sikora, Marek, Kozieł-Wierzbowska, Dorota, Godfrey, Leith

“…Jet powers in many radio galaxies with extended radio structures appear to exceed their associated accretion luminosities. In systems with very low accretion…”
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Dying radio galaxies in the LOFAR Lockman Hole by Brienza, Marisa, Mahony, Elizabeth, Morganti, Raffaella, Prandoni, Isabella, Godfrey, Leith

“…After the jets have switched off, radio galaxies undergo a fading phase which is often named the dying phase. The luminosity evolution of the remnant plasma…”
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Measuring the jet power of flat spectrum radio quasars by Shabala, Stanislav, Santoso, Jesse, Godfrey, Leith

“…We use frequency-dependent position shifts of flat spectrum radio cores to estimate the kinetic power of AGN jets. We find a correlation between the derived…”
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New ALMA and Fermi/LAT Observations of the large-scale jet of PKS 0637-752 Strengthen the Case Against the IC/CMB Model by Meyer, Eileen T, Breiding, Peter, Georganopoulos, Markos, Oteo, Ivan, Zwaan, Martin A, Laing, Robert, Godfrey, Leith, Ivison, R. J

“…The Chandra X-ray observatory has discovered several dozen anomalously X-ray-bright jets associated with powerful quasars. A popular explanation for the X-ray…”
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Missing Gamma-Rays from kpc-scale AGN Jets: A Test of the IC/CMB Model by Meyer, Eileen T, Georganopoulos, Markos, Sparks, William B, Godfrey, Leith, Perlman, Eric

“…The physical origin of the X-ray emission in powerful quasar jets has been a long-standing mystery. Though these jets start out on the sub-pc scale as highly…”
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Microarcsecond structure of an AGN Jet via Interstellar Scintillation by Bignall, Hayley, Macquart, Jean-Pierre, Godfrey, Leith, Hodgson, Jeffrey, Jauncey, David

“…We have used the broadband backend available at the ATCA to study the fast interstellar scintillation of quasar PKS 1257-326, resolving the core shift as a…”
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Ruling out IC/CMB X-rays in PKS 0637-752 and the Implications for TeV Emission from Large-Scale Quasar Jets by Meyer, Eileen T, Georganopoulos, Markos, Sparks, William B, Godfrey, Leith, Lovell, James E. J, Perlman, Eric

“…The Chandra X-ray observatory has discovered dozens of resolved, kiloparsec-scale jets associated with powerful quasars in which the X-ray fluxes are observed…”
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A survey of X-ray emission from 100 kpc radio jets by Schwartz, Daniel A, Marshall, Herman L, Worrall, Diana M, Birkinshaw, Mark, Perlman, Eric, Lovell, James E J, Jauncey, David, Murphy, David, Gelbord, Jonathan, Godfrey, Leith, Bicknell, Geoffrey

“…We have completed a Chandra snapshot survey of 54 radio jets that are extended on arcsec scales. These are associated with flat spectrum radio quasars spanning…”
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FR II radio galaxies at low frequencies I: morphology, magnetic field strength and energetics by Harwood, Jeremy J, Croston, Judith H, Intema, Huib T, Stewart, Adam J, Ineson, Judith, Hardcastle, Martin J, Godfrey, Leith, Best, Philip, Brienza, Marisa, Heesen, Volker, Mahony, Elizabeth K, Morganti, Raffaella, Murgia, Matteo, Orrú, Emanuela, Röttgering, Huub, Shulevski, Aleksandar, Wise, Michael W

“…MNRAS, 2016, 458, 4443 Due to their steep spectra, low-frequency observations of FR II radio galaxies potentially provide key insights in to the morphology,…”
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A Deep Chandra ACIS Survey of M83 by Long, Knox S, Kuntz, Kip D, Blair, William P, Godfrey, Leith, Plucinsky, Paul P, Soria, Roberto, Stockdale, Christopher, Winkler, P. Frank

“…We have obtained a series of deep X-ray images of the nearby galaxy M83 using Chandra, with a total exposure of 729 ks. Combining the new data with earlier…”
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