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Your search keyword '"Chyży, K. T."' showing total 11 results
Start Over Author "Chyży, K. T." Journal monthly notices of the royal astronomical society
11 results on '"Chyży, K. T."'

1. CHANG-ES XXIII: influence of a galactic wind in NGC 5775

Author

Heald, G H, primary, Heesen, V, additional, Sridhar, S S, additional, Beck, R, additional, Bomans, D J, additional, Brüggen, M, additional, Chyży, K T, additional, Damas-Segovia, A, additional, Dettmar, R-J, additional, English, J, additional, Henriksen, R, additional, Ideguchi, S, additional, Irwin, J, additional, Krause, M, additional, Li, J-T, additional, Murphy, E J, additional, Nikiel-Wroczyński, B, additional, Piotrowska, J, additional, Rand, R J, additional, Shimwell, T, additional, Stein, Y, additional, Vargas, C J, additional, Wang, Q D, additional, van Weeren, R J, additional, and Wiegert, T, additional

Published
2021
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2. CHANG-ES XXIII: influence of a galactic wind in NGC 5775.

Author

Heald, G H, Heesen, V, Sridhar, S S, Beck, R, Bomans, D J, Brüggen, M, Chyży, K T, Damas-Segovia, A, Dettmar, R-J, English, J, Henriksen, R, Ideguchi, S, Irwin, J, Krause, M, Li, J-T, Murphy, E J, Nikiel-Wroczyński, B, Piotrowska, J, Rand, R J, and Shimwell, T

Subjects
STELLAR evolution, MAGNETIC flux density, INTERSTELLAR medium, COSMIC rays, STARBURSTS, GALACTIC magnetic fields, STELLAR winds
Abstract

We present new radio continuum images of the edge-on starburst galaxy NGC 5775, from LOFAR (140 MHz) and the Karl G. Jansky Very Large Array CHANG-ES survey (1500 MHz). We trace the non-thermal radio halo up to 13 kpc from the disc, measuring the non-thermal spectral index and estimating the total equipartition magnetic field strength (≈13  |$\mu$| G in the disc and ≈7  |$\mu$| G above the plane). The radio halo has a similar extent at both frequencies, displays evidence for localized cosmic ray streaming coinciding with prominent H α filaments and vertical extensions of the regular magnetic field, and exhibits a boxy morphology especially at 140 MHz. In order to understand the nature of the disc–halo flow, we extend our previous model of cosmic ray propagation by implementing an iso-thermal wind with a tunable 'flux tube' (approximately hyperboloidal) geometry. This updated model is successful in matching the vertical distribution of non-thermal radio emission, and the vertical steepening of the associated spectral index, in a consistent conceptual framework with few free parameters. Our new model provides the opportunity to estimate the mass outflow driven by the star formation process, and we find an implied rate of |$\dot{M}\approx 3$| – |$6\, \mathrm{M_{\odot }\, yr^{-1}}$| (≈40–80 per cent of the star formation rate) if the escape velocity is reached, with substantial uncertainty arising from the poorly understood distribution of interstellar medium material entrained in the vertical flow. The wind may play a role in influencing the vertical gradient in rotational velocity. [ABSTRACT FROM AUTHOR]

Published
2022
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3. The Far-Infrared Radio Correlation at low radio frequency with LOFAR/H-ATLAS

Author

Read, S C, primary, Smith, D J B, additional, Gürkan, G, additional, Hardcastle, M J, additional, Williams, W L, additional, Best, P N, additional, Brinks, E, additional, Calistro-Rivera, G, additional, Chyży, K T, additional, Duncan, K, additional, Dunne, L, additional, Jarvis, M J, additional, Morabito, L K, additional, Prandoni, I, additional, Röttgering, H J A, additional, Sabater, J, additional, and Viaene, S, additional

Published
2018
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4. Exploring the making of a galactic wind in the starbursting dwarf irregular galaxy IC 10 with LOFAR

Author

Heesen, V, primary, Rafferty, D A, additional, Horneffer, A, additional, Beck, R, additional, Basu, A, additional, Westcott, J, additional, Hindson, L, additional, Brinks, E, additional, Chyży, K T, additional, Scaife, A M M, additional, Brüggen, M, additional, Heald, G, additional, Fletcher, A, additional, Horellou, C, additional, Tabatabaei, F S, additional, Paladino, R, additional, Nikiel-Wroczyński, B, additional, Hoeft, M, additional, and Dettmar, R-J, additional

Published
2018
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5. LOFAR reveals the giant: a low-frequency radio continuum study of the outflow in the nearby FR I radio galaxy 3C 31

Author

Heesen, V, primary, Croston, J H, additional, Morganti, R, additional, Hardcastle, M J, additional, Stewart, A J, additional, Best, P N, additional, Broderick, J W, additional, Brüggen, M, additional, Brunetti, G, additional, Chyży, K T, additional, Harwood, J J, additional, Haverkorn, M, additional, Hess, K M, additional, Intema, H T, additional, Jamrozy, M, additional, Kunert-Bajraszewska, M, additional, McKean, J P, additional, Orrú, E, additional, Röttgering, H J A, additional, Shimwell, T W, additional, Shulevski, A, additional, White, G J, additional, Wilcots, E M, additional, and Williams, W L, additional

Published
2017
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6. Deep LOFAR observations of the merging galaxy cluster CIZA J2242.8+5301

Author

Hoang, D. N., primary, Shimwell, T. W., additional, Stroe, A., additional, Akamatsu, H., additional, Brunetti, G., additional, Donnert, J. M. F., additional, Intema, H. T., additional, Mulcahy, D. D., additional, Röttgering, H. J. A., additional, van Weeren, R. J., additional, Bonafede, A., additional, Brüggen, M., additional, Cassano, R., additional, Chyży, K. T., additional, Enßlin, T., additional, Ferrari, C., additional, de Gasperin, F., additional, Gu, L., additional, Hoeft, M., additional, Miley, G. K., additional, Orrú, E., additional, Pizzo, R., additional, and White, G. J., additional

Published
2017
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7. The LOFAR window on star-forming galaxies and AGNs – curved radio SEDs and IR–radio correlation at 0<2.5

Author

Calistro Rivera, G., primary, Williams, W. L., additional, Hardcastle, M. J., additional, Duncan, K., additional, Röttgering, H. J. A., additional, Best, P. N., additional, Brüggen, M., additional, Chyży, K. T., additional, Conselice, C. J., additional, de Gasperin, F., additional, Engels, D., additional, Gürkan, G., additional, Intema, H. T., additional, Jarvis, M. J., additional, Mahony, E. K., additional, Miley, G. K., additional, Morabito, L. K., additional, Prandoni, I., additional, Sabater, J., additional, Smith, D. J. B., additional, Tasse, C., additional, van der Werf, P. P., additional, and White, G. J., additional

Published
2017
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8. Investigating the unification of LOFAR-detected powerful AGN in the Boötes field

Author

Morabito, Leah K., primary, Williams, W. L., additional, Duncan, Kenneth J., additional, Röttgering, H. J. A., additional, Miley, George, additional, Saxena, Aayush, additional, Barthel, Peter, additional, Best, P. N., additional, Bruggen, M., additional, Brunetti, G., additional, Chyży, K. T., additional, Engels, D., additional, Hardcastle, M. J., additional, Harwood, J. J., additional, Jarvis, Matt J., additional, Mahony, E. K., additional, Prandoni, I., additional, Shimwell, T. W., additional, Shulevski, A., additional, and Tasse, C., additional

Published
2017
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9. LOFAR/H-ATLAS: a deep low-frequency survey of theHerschel-ATLAS North Galactic Pole field

Author

Hardcastle, M. J., primary, Gürkan, G., additional, van Weeren, R. J., additional, Williams, W. L., additional, Best, P. N., additional, de Gasperin, F., additional, Rafferty, D. A., additional, Read, S. C., additional, Sabater, J., additional, Shimwell, T. W., additional, Smith, D. J. B., additional, Tasse, C., additional, Bourne, N., additional, Brienza, M., additional, Brüggen, M., additional, Brunetti, G., additional, Chyży, K. T., additional, Conway, J., additional, Dunne, L., additional, Eales, S. A., additional, Maddox, S. J., additional, Jarvis, M. J., additional, Mahony, E. K., additional, Morganti, R., additional, Prandoni, I., additional, Röttgering, H. J. A., additional, Valiante, E., additional, and White, G. J., additional

Published
2016
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10. A plethora of diffuse steep spectrum radio sources in Abell 2034 revealed by LOFAR

Author

Shimwell, T. W., primary, Luckin, J., additional, Brüggen, M., additional, Brunetti, G., additional, Intema, H. T., additional, Owers, M. S., additional, Röttgering, H. J. A., additional, Stroe, A., additional, van Weeren, R. J., additional, Williams, W. L., additional, Cassano, R., additional, de Gasperin, F., additional, Heald, G. H., additional, Hoang, D. N., additional, Hardcastle, M. J., additional, Sridhar, S. S., additional, Sabater, J., additional, Best, P. N., additional, Bonafede, A., additional, Chyży, K. T., additional, Enßlin, T. A., additional, Ferrari, C., additional, Haverkorn, M., additional, Hoeft, M., additional, Horellou, C., additional, McKean, J. P., additional, Morabito, L. K., additional, Orrù, E., additional, Pizzo, R., additional, Retana-Montenegro, E., additional, and White, G. J., additional

Published
2016
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11. LOFAR reveals the giant: a low-frequency radio continuum study of the outflow in the nearby FR I radio galaxy 3C 31.

Author

Heesen, V., Croston, J. H., Morganti, R., Hardcastle, M. J., Stewart, A. J., Best, P. N., Broderick, J. W., Brüggen, M., Brunetti, G., Chyży, K. T., Harwood, J. J., Haverkorn, M., Hess, K. M., Intema, H. T., Jamrozy, M., Kunert-Bajraszewska, M., McKean, J. P., Orrú, E., Röttgering, H. J. A., and Shimwell, T. W.

Subjects
ASTRONOMICAL surveys, COSMIC rays, RADIO galaxies, LUMINOSITY, PLASMA jets
Abstract

We present a deep, low-frequency radio continuum study of the nearby Fanaroff–Riley class I (FR I) radio galaxy 3C 31 using a combination of LOw Frequency ARray (LOFAR; 30–85 and 115–178 MHz), Very Large Array (VLA; 290–420 MHz), Westerbork Synthesis Radio Telescope (WSRT; 609 MHz) and Giant Metre Radio Telescope (GMRT; 615 MHz) observations. Our new LOFAR 145-MHz map shows that 3C 31 has a largest physical size of 1.1 Mpc in projection, which means 3C 31 now falls in the class of giant radio galaxies. We model the radio continuum intensities with advective cosmic ray transport, evolving the cosmic ray electron population and magnetic field strength in the tails as functions of distance to the nucleus. We find that if there is no in situ particle acceleration in the tails, then decelerating flows are required that depend on radius r as v∝rβ (β ≈ −1). This then compensates for the strong adiabatic losses due to the lateral expansion of the tails. We are able to find self-consistent solutions in agreement with the entrainment model of Croston & Hardcastle, where the magnetic field provides ≈1/3 of the pressure needed for equilibrium with the surrounding intracluster medium. We obtain an advective time-scale of ≈190 Myr, which, if equated to the source age, would require an average expansion Mach number M≈5 over the source lifetime. Dynamical arguments suggest that instead either the outer tail material does not represent the oldest jet plasma or else the particle ages are underestimated due to the effects of particle acceleration on large scales. [ABSTRACT FROM AUTHOR]

Published
2018
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