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Spectroscopic properties of radio-loud and radio-quiet quasars

Published online by Cambridge University Press:  29 January 2021

Avinanda Chakraborty  and
Anirban Bhattacharjee
Avinanda Chakraborty
Affiliation:
Presidency University, Kolkata, Pincode 700073, 86/1 College Street, West Bengal, India email: avinanda.rs@presiuniv.ac.in
Anirban Bhattacharjee
Affiliation:
Sul Ross State University, Texas, Box C-64, Alpine, TX 79832, Texas, USA email: anirbanbhattacharjeee@gmail.com
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Abstract

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Surveys have shown radio-loud (RL) quasars constitute 10%-15% of the total quasar population and rest are radio-quiet (RQ). However, it is unknown if this radio-loud fraction (RLF) remains consistent among different parameter spaces. This study shows that RLF increases for increasing full width half maximum (FWHM) velocity of the Hβ broad emission line (z < 0.75). To analyse the reason, we compared bolometric luminosity of RL and RQ quasars sample which have FWHM of Hβ broad emission line greater than 15000km/s (High Broad Line or HBL) with which have FWHM of Hβ emission line less than 2500km/s (Low Broad Line or LBL). From the distributions we can conclude for the HBL, RQ and RL quasars are peaking separately and RL quasars are having higher values whereas for the LBL the peaks are almost indistinguishable. We predicted selection effects could be the possible reason but to conclude anything more analysis is needed. Then we compared our result with Wills & Brotherton (1995) and have shown that some objects from our sample do not follow the pattern of the logR vs FWHM plot where R is the ratio of 5 GHz radio core flux density with the extended radio lobe flux density.

Keywords

Surveysquasarsredshiftluminosityemission linejet
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 72 - 76
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

References

Abazajian, K. N., Adelman-McCarthy, J. K., Agüeros, M. A., Allam, S. S., et al. 2009, ApJS, 182, 54310.1088/0067-0049/182/2/543CrossRefGoogle Scholar
Bhattacharjee, A., Gilbert, M., Brotherton, M. S., et al. 2018, AAS, 232, 23232203BGoogle Scholar
Bridle, A. H., Hough, D. H., Lonsdale, C. J., Burns, J. O., & Laing, R. A. 1994, AJ, 108, 76610.1086/117112CrossRefGoogle Scholar
Edge, D. O., Shakeshaft, J. R., McAdam, W. B., Baldwin, J. E., & Archer, S. 1959, Mem. RAS, 68, 37Google Scholar
Jarvis, M. J. & McLure, R. J. 2006, MNRAS, 369, 18210.1111/j.1365-2966.2006.10295.xCrossRefGoogle Scholar
Kratzer, R. M. & Richards, G. T. 2015, The Astronomical Journal, 149, 6110.1088/0004-6256/149/2/61CrossRefGoogle Scholar
Leipski, C., Falcke, H., Bennert, N., & Hüttemeister, S. 2006, A&A, 455, 161Google Scholar
Lynden-Bell, D. 1969, Nature, 223, 69010.1038/223690a0CrossRefGoogle Scholar
Mullin, L. M., Riley, J. M., & Hardcastle, M. J. 2008, MNRAS, 390, 59510.1111/j.1365-2966.2008.13534.xCrossRefGoogle Scholar
Rawlings, S. & Saunders, R. 1991, Nature, 349, 13810.1038/349138a0CrossRefGoogle Scholar
Salpeter, E. E. 1964, ApJ, 141, 1560Google Scholar
Sandage, A. 1965, ApJ, 141, 156010.1086/148245CrossRefGoogle Scholar
Schmidt, M. 1963, Nature, 197, 104010.1038/1971040a0CrossRefGoogle Scholar
Shen, Y., Richards, G. T., Strauss, M. A., Hall, P. B., Schneider, D. P., Snedden, S., Bizyaev, D., Brewington, H., Malanushenko, V., Malanushenko, E., Oravetz, D., Pan, K., & Simmons, A. 2011, ApJ, 194, 45Google Scholar
Ulvestad, J. S., Wong, D. S., Taylor, G. B. F., Gallimore, J. F., & Mundell, C. G. 2005, The Astronomical Journal, 130, 93610.1086/432034CrossRefGoogle Scholar
Van Gorkom, K. J., Wardle, J. F. C., Rauch, A. P., & Gobeille, D. B. 2015, MNRAS, 450, 424010.1093/mnras/stv912CrossRefGoogle Scholar
White, R. L., Helfand, D. J., Becker, R. H., Glikman, E., & de Vries, W. 2007, ApJ, 654, 9910.1086/507700CrossRefGoogle Scholar
Wills, B. J. & Brotherton, M. S. 1995, The Astrophysical Journal, 44810.1086/309614CrossRefGoogle Scholar
Wills, B. J. & Browne, I. W. A. 1986, ApJ, 302, 5610.1086/163973CrossRefGoogle Scholar
Yee, H.K.C. & Oke, J.B. 1978, ApJ, 226, 753Google Scholar
York, D. G., Adelman, J., Anderson, J. E. Jr, Anderson, S. F., Annis, J., Bahcall, N. A., et al. 2000, AJ, 120, 157910.1086/301513CrossRefGoogle Scholar