On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources

Ezeugo Jeremiah Chukwuemerie

doi:doi:10.11648/j.ijass.20150302.12

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On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources

Ezeugo Jeremiah Chukwuemerie

Published in International Journal of Astrophysics and Space Science (Volume 3, Issue 2)

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

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Abstract

Frequency peak/linear size (ν_p-D) relation gives the strongest correlation among all the currently observable physical properties of Compact Steep Spectrum Sources (CSSs). This strong correlation suggests that the spectral turnover constitutes a characteristic signature of dense gases around the CSS sources which may be used to constrain physical mechanisms that govern the dynamical evolution of CSS sources. We have therefore, carried out statistical analyses to ascertain whether the observed ν_p-D correlation is real or an artifact arising from a possible spectral turnover/radio luminosity (ν_p-P) and/or linear size/radio luminosity (D-P) correlations. Our results show only a marginally significant ν_p-P correlation (correlation coefficient, r≈0.3) and apparently little or no D-P correlation. This suggests that the mechanism for the spectral turnover lies mainly in the source size according to the relation, ν_p~D^(-0.7), with correlation coefficient, r≈-0.9.

Published in	International Journal of Astrophysics and Space Science (Volume 3, Issue 2)
DOI	10.11648/j.ijass.20150302.12
Page(s)	20-24
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

Galaxies, Quasars, Radio, Luminosity, Redshift

References

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APA Style

Ezeugo Jeremiah Chukwuemerie. (2015). On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. International Journal of Astrophysics and Space Science, 3(2), 20-24. https://doi.org/10.11648/j.ijass.20150302.12

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ACS Style

Ezeugo Jeremiah Chukwuemerie. On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. Int. J. Astrophys. Space Sci. 2015, 3(2), 20-24. doi: 10.11648/j.ijass.20150302.12

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AMA Style

Ezeugo Jeremiah Chukwuemerie. On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. Int J Astrophys Space Sci. 2015;3(2):20-24. doi: 10.11648/j.ijass.20150302.12

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@article{10.11648/j.ijass.20150302.12,
  author = {Ezeugo Jeremiah Chukwuemerie},
  title = {On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources},
  journal = {International Journal of Astrophysics and Space Science},
  volume = {3},
  number = {2},
  pages = {20-24},
  doi = {10.11648/j.ijass.20150302.12},
  url = {https://doi.org/10.11648/j.ijass.20150302.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijass.20150302.12},
  abstract = {Frequency peak/linear size (ν_p-D) relation gives the strongest correlation among all the currently observable physical properties of Compact Steep Spectrum Sources (CSSs). This strong correlation suggests that the spectral turnover constitutes a characteristic signature of dense gases around the CSS sources which may be used to constrain physical mechanisms that govern the dynamical evolution of CSS sources. We have therefore, carried out statistical analyses to ascertain whether the observed ν_p-D correlation is real or an artifact arising from a possible spectral turnover/radio luminosity (ν_p-P) and/or linear size/radio luminosity (D-P) correlations. Our results show only a marginally significant ν_p-P correlation (correlation coefficient, r≈0.3) and apparently little or no D-P correlation. This suggests that the mechanism for the spectral turnover lies mainly in the source size according to the relation, ν_p~D^(-0.7), with correlation coefficient, r≈-0.9.},
 year = {2015}
}

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TY  - JOUR
T1  - On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources
AU  - Ezeugo Jeremiah Chukwuemerie
Y1  - 2015/04/30
PY  - 2015
N1  - https://doi.org/10.11648/j.ijass.20150302.12
DO  - 10.11648/j.ijass.20150302.12
T2  - International Journal of Astrophysics and Space Science
JF  - International Journal of Astrophysics and Space Science
JO  - International Journal of Astrophysics and Space Science
SP  - 20
EP  - 24
PB  - Science Publishing Group
SN  - 2376-7022
UR  - https://doi.org/10.11648/j.ijass.20150302.12
AB  - Frequency peak/linear size (ν_p-D) relation gives the strongest correlation among all the currently observable physical properties of Compact Steep Spectrum Sources (CSSs). This strong correlation suggests that the spectral turnover constitutes a characteristic signature of dense gases around the CSS sources which may be used to constrain physical mechanisms that govern the dynamical evolution of CSS sources. We have therefore, carried out statistical analyses to ascertain whether the observed ν_p-D correlation is real or an artifact arising from a possible spectral turnover/radio luminosity (ν_p-P) and/or linear size/radio luminosity (D-P) correlations. Our results show only a marginally significant ν_p-P correlation (correlation coefficient, r≈0.3) and apparently little or no D-P correlation. This suggests that the mechanism for the spectral turnover lies mainly in the source size according to the relation, ν_p~D^(-0.7), with correlation coefficient, r≈-0.9.
VL  - 3
IS  - 2
ER  -

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Author Information

Ezeugo Jeremiah Chukwuemerie

Department of Physics and Industrial Physics, Nnamdi Azikiwe University, Awka, Nigeria

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APA Style

Ezeugo Jeremiah Chukwuemerie. (2015). On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. International Journal of Astrophysics and Space Science, 3(2), 20-24. https://doi.org/10.11648/j.ijass.20150302.12

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ACS Style

Ezeugo Jeremiah Chukwuemerie. On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. Int. J. Astrophys. Space Sci. 2015, 3(2), 20-24. doi: 10.11648/j.ijass.20150302.12

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AMA Style

Ezeugo Jeremiah Chukwuemerie. On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources. Int J Astrophys Space Sci. 2015;3(2):20-24. doi: 10.11648/j.ijass.20150302.12

Copy | Download

@article{10.11648/j.ijass.20150302.12,
  author = {Ezeugo Jeremiah Chukwuemerie},
  title = {On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources},
  journal = {International Journal of Astrophysics and Space Science},
  volume = {3},
  number = {2},
  pages = {20-24},
  doi = {10.11648/j.ijass.20150302.12},
  url = {https://doi.org/10.11648/j.ijass.20150302.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijass.20150302.12},
  abstract = {Frequency peak/linear size (ν_p-D) relation gives the strongest correlation among all the currently observable physical properties of Compact Steep Spectrum Sources (CSSs). This strong correlation suggests that the spectral turnover constitutes a characteristic signature of dense gases around the CSS sources which may be used to constrain physical mechanisms that govern the dynamical evolution of CSS sources. We have therefore, carried out statistical analyses to ascertain whether the observed ν_p-D correlation is real or an artifact arising from a possible spectral turnover/radio luminosity (ν_p-P) and/or linear size/radio luminosity (D-P) correlations. Our results show only a marginally significant ν_p-P correlation (correlation coefficient, r≈0.3) and apparently little or no D-P correlation. This suggests that the mechanism for the spectral turnover lies mainly in the source size according to the relation, ν_p~D^(-0.7), with correlation coefficient, r≈-0.9.},
 year = {2015}
}

Copy | Download

TY  - JOUR
T1  - On the Dependence of Spectral Turnover on Linear Size of Compact Steep Spectrum Radio Sources
AU  - Ezeugo Jeremiah Chukwuemerie
Y1  - 2015/04/30
PY  - 2015
N1  - https://doi.org/10.11648/j.ijass.20150302.12
DO  - 10.11648/j.ijass.20150302.12
T2  - International Journal of Astrophysics and Space Science
JF  - International Journal of Astrophysics and Space Science
JO  - International Journal of Astrophysics and Space Science
SP  - 20
EP  - 24
PB  - Science Publishing Group
SN  - 2376-7022
UR  - https://doi.org/10.11648/j.ijass.20150302.12
AB  - Frequency peak/linear size (ν_p-D) relation gives the strongest correlation among all the currently observable physical properties of Compact Steep Spectrum Sources (CSSs). This strong correlation suggests that the spectral turnover constitutes a characteristic signature of dense gases around the CSS sources which may be used to constrain physical mechanisms that govern the dynamical evolution of CSS sources. We have therefore, carried out statistical analyses to ascertain whether the observed ν_p-D correlation is real or an artifact arising from a possible spectral turnover/radio luminosity (ν_p-P) and/or linear size/radio luminosity (D-P) correlations. Our results show only a marginally significant ν_p-P correlation (correlation coefficient, r≈0.3) and apparently little or no D-P correlation. This suggests that the mechanism for the spectral turnover lies mainly in the source size according to the relation, ν_p~D^(-0.7), with correlation coefficient, r≈-0.9.
VL  - 3
IS  - 2
ER  -

Copy | Download