Search Results - "active galactic nucleus"

The microarcsecond structure of an active galactic nucleus jet via interstellar scintillation by Macquart, Jean-Pierre, Godfrey, L., Bignall, Hayley, Hodgson, J.

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The VSOP 5 GHz Active Galactic Nucleus Survey. II. Data Calibration and Imaging by Lovell, J., Moellenbrock, G., Horiuchi, S., Fomalont, E., Scott, W., Hirabayashi, H., Dodson, R., Dougherty, S., Edwards, P., Frey, S., Gurvits, L., Lister, M., Murphy, D., Paragi, Z., Piner, B., Shen, Z., Taylor, A., Tingay, Steven, Asaki, Y., Moffett, D., Murata, Y.

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A new method for estimating frequency-dependent core shifts in active galactic nucleus jets by Kudryavtseva, Nadia, Gabuzda, D., Aller, M., Aller, H.

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The VSOP 5 GHz Active Galactic Nucleus Survey. V. Imaging Results for the Remaining 140 by Dodson, R., Formalont, E., Wiik, K., Horiuchi, S., Hirabayashi, H., Edwards, P., Murata, Y., Asaki, Y., Moellenbrock, G., Scott, W., Taylor, A., Gurvits, L., Paragi, Z., Frey, S., Shen, Z., Lovell, J., Tingay, Steven, Rioja, M., Fodor, S., Lister, M., Mosoni, L., Coldwell, G., Piner, B., Yang, J.

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A Magnified View of Circumnuclear Star Formation and Feedback around an Active Galactic Nucleus at z=2.6 by Geach, James E., Ivison, Rob J., Dye, Simon, Oteo, Iván

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Understanding high redshift Active Galactic Nuclei activity through infrared variability by Green, Karel

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The Spitzer mid-infrared active galactic nucleus survey. I. Optical and near-infrared spectroscopy of obscured candidates and normal active galactic nuclei selected in the mid-infrared by Lacy, M., Ridgway, S., Gates, E., Nielsen, D., Petric, A., Sajina, A., Urrutia, T., Cox Drews, S., Harrison, C., Seymour, Nick, Storrie-Lombardi, L.

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Starburst and old stellar populations in the z -~ 3.8 radio galaxies 4c 41.17 and TN J2007-1316 by Rocca-Volmerange, B., Drouart, G., De Breuck, C., Vernet, J., Seymour, Nick, Wylezalek, D., Lehnert, M., Nesvadba, N., Fioc, M.

“…Our best fits are a sum of two evolving stellar populations – a recent starburst plus an old population – plus the thermal emission from an active galactic nucleus (which provides a good fit to the mid-IR emission). …”
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Optical and radio astrometry of the galaxy associated with FRB 150418 by Bassa, C., Beswick, R., Tingay, Steven, Keane, E., Bhandari, S., Johnston, S., Totani, T., Tominaga, N., Yasuda, N., Stappers, B., Barr, E., Kramer, M., Possenti, A.

“…We conclude that it is likely that WISE J071634.59-190039.2 contains a weak radio active galactic nucleus.…”
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The diffuse radio emission around NGC 5580 and NGC 5588 by De Gasperin, F., Intema, Hubertus, Williams, W., Brüggen, M., Murgia, M., Beck, R., Bonafede, A.

“…We argue that the extended radio emission is the remnant of a past activity cycle of the active galactic nucleus present in NGC 5580 and therefore a notable example of a dying radio galaxy located outside dense environments. © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.…”
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Radio variability in the phoenix deep survey at 1.4 GHz by Hancock, Paul, Drury, J., Bell, M., Murphy, T., Gaensler, B.

“…We make use of Wide-field Infrared Survey Explorer infrared cross-ids, and identify all variable sources as an active galactic nucleus of some description.We suggest that the discrepancy between previous VLA results is due to the different time-scales probed by each of the surveys, and that radio variability at 1.4 GHz is greatest on time-scales of 2-5 yr.…”
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Radio light curve of the galaxy possibly associated with FRB 150418 by Johnston, S., Keane, E., Bhandari, S., Macquart, Jean-Pierre, Tingay, Steven, Barr, E., Bassa, C., Beswick, R., Burgay, M., Chandra, P., Honma, M., Kramer, M., Petroff, E., Possenti, A., Stappers, B., Sugai, H.

“…Statistical analysis of the flux densities shows that the variations seen are consistent with refractive interstellar scintillation of the weak active galactic nucleus at the centre of the galaxy. It may therefore be the case that the FRB and the galaxy are not associated. …”
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Radio-interferometric Monitoring of FRB 131104: A Coincident AGN Flare, but No Evidence for a Cosmic Fireball by Shannon, Ryan, Ravi, V.

“…Optical and infrared photometry, and deep optical spectroscopy, suggest that the object is a narrow-line radio active galactic nucleus. © 2017. The American Astronomical Society. …”
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Jet and torus orientations in high redshift radio galaxies by Drouart, G., De Breuck, C., Vernet, J., Laing, R., Seymour, Nick, Stern, D., Haas, M., Pier, E., Rocca-Volmerange, B.

“…We examine the relative orientation of radio jets and dusty tori surrounding the active galactic nucleus (AGN) in powerful radio galaxies at z > 1. …”
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Size dependence of the radio-luminosity-mechanical-power correlation in radio galaxies by Shabala, S., Godfrey, L.

“…We examine the relationship between source radio luminosity and kinetic power in active galactic nucleus jets. We show that neglecting various loss processes can introduce a systematic bias in the jet powers inferred from radio luminosities for a sample of radio galaxies. …”
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ALMA Detections of CO Emission in the Most Luminous, Heavily Dust-obscured Quasars at z > 3 by Fan, L., Knudsen, K., Fogasy, J., Drouart, Guillaume

“…Our result is consistent with the popular active galactic nucleus (AGN) feedback scenario involving the co-evolution between the supermassive black holes and host galaxy.…”
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A study of high-redshift AGN feedback in SZ cluster samples by Bîrzan, L., Rafferty, D., Brüggen, M., Intema, Hubertus

“…We present a study of active galactic nucleus (AGN) feedback at higher redshifts (0.3 < z < 1.2) using Sunyaev-Zel'dovich selected samples of clusters from the South Pole Telescope and Atacama Cosmology Telescope surveys. …”
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X-ray sources population in NGC 1559 by Nurnabilah Nazri, Adlyka Annuar

“…We did not detect any X-ray nuclear point source in the galaxy, suggesting that NGC 1559 does not host an active galactic nucleus. This is supported by its HII optical spectral classification and our infrared analysis using WISE.…”
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Extended X-ray emission in PKS 1718-649 by Beuchert, T., Rodríguez-Ardila, A., Moss, V., Schulz, R., Kadler, M., Wilms, J., Angioni, R., Callingham, J., Gräfe, C., Krauß, F., Kreikenbohm, A., Langejahn, M., Leiter, K., Maccagni, F., Müller, C., Ojha, R., Ros, E., Tingay, Steven

“…PKS 1718-649 is one of the closest and most comprehensively studied candidates of a young active galactic nucleus (AGN) that is still embedded in its optical host galaxy. …”
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Galaxy And Mass Assembly: the 1.4 GHz SFR indicator, SFR-M* relation and predictions for ASKAP-GAMA by Davies, L., Huynh, M., Hopkins, A., Seymour, Nick, Driver, S., Robotham, A., Baldry, I., Bland-Hawthorn, J., Bourne, N., Bremer, M., Brown, M., Brough, S., Cluver, M., Grootes, M., Jarvis, M., Loveday, J., Moffet, A., Owers, M., Phillipps, S., Sadler, E., Wang, L., Wilkins, S., Wright, A.

“…We identify individually detected 1.4 GHz GAMA–FIRST sources and use a late-type, non-active galactic nucleus, volume-limited sample from GAMA to produce stellar mass-selected samples. …”
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