On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources

Ezeugo Jeremiah Chukwuemerie

doi:doi:10.11648/j.ajaa.20150303.12

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On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources

Ezeugo Jeremiah Chukwuemerie

Published in American Journal of Astronomy and Astrophysics (Volume 3, Issue 3)

Received: 26 March 2015 Accepted: 15 April 2015 Published: 30 April 2015

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Abstract

We used both analytical and statistical methods of analyses to find out if there is possible connection between jet opening solid angle and linear size evolution of some powerful extragalactic radio sources in our sample. Based on simple linear regression analyses of D-Ω data (where D is observed linear size and Ω is estimated jet opening solid angle), we found with a marginal correlation, that effects contributed by the opening angle may be overshadowed by other factors. A plausible interpretation of the result is that there is presence of appreciable ambient gases around these sources.

Published in	American Journal of Astronomy and Astrophysics (Volume 3, Issue 3)
DOI	10.11648/j.ajaa.20150303.12
Page(s)	40-43
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Jet, Ambient Density, Opening Angle, Evolution, Galaxies, Radio Sources

References

[1]	H. Meusinger, and V. Weiss, “Ultraviolet variability of quasars: dependence on the accretion rate,” Astron. and Astrophy., vol. 560, pp. 1-16, 2013
[2]	A. C. Readhead, “Evolution of powerful extragalactic radio sources,” in Quasars and Active Galactic Nuclei, vol. 92, M. Kohen, and K. Kellermann, Eds. U.S.A: National Academy of Sciences, 1995, pp.11447-11450
[3]	I. Robson, Active Galactic Nuclei, England: John Wileyand Sons, 1996, pp. 232 – 234
[4]	G. Lanzuisi, P. Ranalli, I. Georgantopoulos, A. Georgakakis, I. Delvecchio, T. Akylas, S. Berta, A. Bongiorno, M. Brusa, N. Cappelluti, F. Civano, A. Comastri, R. Gilli, C. Gruppioni, G. Hasinger, K. Iwasawa, A.Koekemoer, E. Lusso, S. Marchesi, V. Mainieri, A. Merloni, M. Mignoli, E. Piconcelli, F. Pozzi, D. J. Rosario, M. Salvato, J. Silverman, B. Trakhtenbrot, C. Vignali and G. Zamorani, “Compton thick AGN in the XMM-COSMOS survey” Astron. and Astrophy.vol.573, pp.137-160, 2015
[5]	C. A. Jackson,“Radio source evolution and unified schemes,” Publ. Astron. Soc. Aust., vol. 16,pp.124-129, 1999
[6]	N. Kawakatu, M. Kino, “The velocity of large-scale jets in a Declining Density Medium”, in Triggering relativistic jets, vol. 27, W. H. Lee & E. Ramirez-Ruiz, Eds. Instituto de Astronomia, UNAM, 2007,pp. 192-197
[7]	C. P. O’Dea, “The compact steep-spectrum sources and Gigahertz peaked-spectrum radio sources”, Pub. Astron. Soc. Ppacific, vol. 110, pp. 493-532, 1998
[8]	J. C. Ezeugo, and A. A. Ubachukwu, “The spectral turnover-linear size relation and the dynamical evolution of compact steep spectrum sources”, Mon. Not. Roy. Ast. Soc, vol. 408, pp. 2256-2260, 2010
[9]	K. Nilsson, “Kinematical Models of Double Radio Sources and the Unified Scheme”, Mon. Not. Roy. Ast. Soc., vol. 132, pp. 31-37, 1998
[10]	C. P. O'Dea, R. A. Dally, P. Kharb, and K. A. Freeman, “Physical properties of very powerful FRII radiogalaxies”, Astro. and Astrophys., vol. 494, pp. 471,2009
[11]	C. Fanti, R. Fanti, D. C. Dallacasa, R. T. Schilizzi, R.E. Spencer, and C. Stanghellini, “Are compact steep-spectrum sources young?”Astron. and Astrophy., vol. 302, pp. 317-326,1995
[12]	A. C. S. Readhead, G. B. Taylor, W. Xu, T. J. Pearson, P. N. Wilkinson, A. G. Polatidis, “The statistics and ages of compact symmetric objects, ”The Astrophy. Journ., vol. 460, pp. 612-633, 1996
[13]	J. C. Cavalho, “The evolution of GHz-peaked-spectrum radio sources,” Astronomy and Astrophysics, vol. 329,pp. 845-852, 1998
[14]	A. Labiano, “Tracing jet-ISM interaction in young AGN: correlations between [O III] λ 500 A ̇ and5GHzemission”, Astron. and Astrophy., 488, vol.L59-L62, 2008
[15]	J. C. Ezeugo, “Compact Steep-Spectrum Radio Sources and Ambient Medium Density, ”Intn’l Journal of Astrophy. and Space Sc. Vol. 3, 2015, pp. 1-6, 2015
[16]	I. Owsianik, and J. E. Conway, “First detection of hotspot advance in a compact symmetric object” Astron. and Astrophy., vol. 337, pp. 69-79, 1998
[17]	F. Mantovani, W. Junor, M. Bondi, W. Cotton, R. Fanti, L. Padrielli, G. D. Nicolson, E. Salerno, “Large Bent Jets in the Inner Region of CSSs,” Astron. and Astrophy., vol.332, pp. 10–18, 1998
[18]	F. Santoro, J. B. R. Oonk, R. Morganti, and T. Oosterloo, “The jet-ISM interaction in the outer filament of Centaurus A, ”Astron. and Astrophy., vol. 574, A89, 2015

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APA Style

Ezeugo Jeremiah Chukwuemerie. (2015). On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. American Journal of Astronomy and Astrophysics, 3(3), 40-43. https://doi.org/10.11648/j.ajaa.20150303.12

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ACS Style

Ezeugo Jeremiah Chukwuemerie. On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. Am. J. Astron. Astrophys. 2015, 3(3), 40-43. doi: 10.11648/j.ajaa.20150303.12

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AMA Style

Ezeugo Jeremiah Chukwuemerie. On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. Am J Astron Astrophys. 2015;3(3):40-43. doi: 10.11648/j.ajaa.20150303.12

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@article{10.11648/j.ajaa.20150303.12,
  author = {Ezeugo Jeremiah Chukwuemerie},
  title = {On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources},
  journal = {American Journal of Astronomy and Astrophysics},
  volume = {3},
  number = {3},
  pages = {40-43},
  doi = {10.11648/j.ajaa.20150303.12},
  url = {https://doi.org/10.11648/j.ajaa.20150303.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaa.20150303.12},
  abstract = {We used both analytical and statistical methods of analyses to find out if there is possible connection between jet opening solid angle and linear size evolution of some powerful extragalactic radio sources in our sample. Based on simple linear regression analyses of D-Ω data (where D is observed linear size and Ω is estimated jet opening solid angle), we found with a marginal correlation, that effects contributed by the opening angle may be overshadowed by other factors. A plausible interpretation of the result is that there is presence of appreciable ambient gases around these sources.},
 year = {2015}
}

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TY  - JOUR
T1  - On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources
AU  - Ezeugo Jeremiah Chukwuemerie
Y1  - 2015/04/30
PY  - 2015
N1  - https://doi.org/10.11648/j.ajaa.20150303.12
DO  - 10.11648/j.ajaa.20150303.12
T2  - American Journal of Astronomy and Astrophysics
JF  - American Journal of Astronomy and Astrophysics
JO  - American Journal of Astronomy and Astrophysics
SP  - 40
EP  - 43
PB  - Science Publishing Group
SN  - 2376-4686
UR  - https://doi.org/10.11648/j.ajaa.20150303.12
AB  - We used both analytical and statistical methods of analyses to find out if there is possible connection between jet opening solid angle and linear size evolution of some powerful extragalactic radio sources in our sample. Based on simple linear regression analyses of D-Ω data (where D is observed linear size and Ω is estimated jet opening solid angle), we found with a marginal correlation, that effects contributed by the opening angle may be overshadowed by other factors. A plausible interpretation of the result is that there is presence of appreciable ambient gases around these sources.
VL  - 3
IS  - 3
ER  -

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Author Information

Ezeugo Jeremiah Chukwuemerie

Department of Physics and Industrial physics, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria

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APA Style

Ezeugo Jeremiah Chukwuemerie. (2015). On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. American Journal of Astronomy and Astrophysics, 3(3), 40-43. https://doi.org/10.11648/j.ajaa.20150303.12

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ACS Style

Ezeugo Jeremiah Chukwuemerie. On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. Am. J. Astron. Astrophys. 2015, 3(3), 40-43. doi: 10.11648/j.ajaa.20150303.12

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AMA Style

Ezeugo Jeremiah Chukwuemerie. On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources. Am J Astron Astrophys. 2015;3(3):40-43. doi: 10.11648/j.ajaa.20150303.12

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@article{10.11648/j.ajaa.20150303.12,
  author = {Ezeugo Jeremiah Chukwuemerie},
  title = {On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources},
  journal = {American Journal of Astronomy and Astrophysics},
  volume = {3},
  number = {3},
  pages = {40-43},
  doi = {10.11648/j.ajaa.20150303.12},
  url = {https://doi.org/10.11648/j.ajaa.20150303.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaa.20150303.12},
  abstract = {We used both analytical and statistical methods of analyses to find out if there is possible connection between jet opening solid angle and linear size evolution of some powerful extragalactic radio sources in our sample. Based on simple linear regression analyses of D-Ω data (where D is observed linear size and Ω is estimated jet opening solid angle), we found with a marginal correlation, that effects contributed by the opening angle may be overshadowed by other factors. A plausible interpretation of the result is that there is presence of appreciable ambient gases around these sources.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - On Jet Opening Angle and Dynamical Evolution of Some Powerful Extragalactic Radio Sources
AU  - Ezeugo Jeremiah Chukwuemerie
Y1  - 2015/04/30
PY  - 2015
N1  - https://doi.org/10.11648/j.ajaa.20150303.12
DO  - 10.11648/j.ajaa.20150303.12
T2  - American Journal of Astronomy and Astrophysics
JF  - American Journal of Astronomy and Astrophysics
JO  - American Journal of Astronomy and Astrophysics
SP  - 40
EP  - 43
PB  - Science Publishing Group
SN  - 2376-4686
UR  - https://doi.org/10.11648/j.ajaa.20150303.12
AB  - We used both analytical and statistical methods of analyses to find out if there is possible connection between jet opening solid angle and linear size evolution of some powerful extragalactic radio sources in our sample. Based on simple linear regression analyses of D-Ω data (where D is observed linear size and Ω is estimated jet opening solid angle), we found with a marginal correlation, that effects contributed by the opening angle may be overshadowed by other factors. A plausible interpretation of the result is that there is presence of appreciable ambient gases around these sources.
VL  - 3
IS  - 3
ER  -

Copy | Download