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Catalogue with visual morphological classification of 32,616 radio galaxies with optical hosts

Published online by Cambridge University Press:  29 January 2021

Natalia Żywucka
Affiliation:
Centre for Space Research, North-West University, 2520, Potchefstroom, South Africa email: n.zywucka@oa.uj.edu.pl
Dorota Koziel-Wierzbowska
Affiliation:
Astronomical Observatory, Jagiellonian University, 30-244, Kraków, Poland emails: dorota.koziel@uj.edu.pl; arti@oa.uj.edu.pl
Arti Goyal
Affiliation:
Astronomical Observatory, Jagiellonian University, 30-244, Kraków, Poland emails: dorota.koziel@uj.edu.pl; arti@oa.uj.edu.pl
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Abstract

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We present the catalogue of Radio sources associated with Optical Galaxies and having Unresolved or Extended morphologies I (ROGUE I). It was generated by cross-matching galaxies from the Sloan Digital Sky Survey Data Release 7 (SDSS DR 7) as well as radio sources from the First Images of Radio Sky at Twenty Centimetre (FIRST) and the National Radio Astronomical Observatory VLA Sky Survey (NVSS) catalogues. We created the largest handmade catalogue of visually classified radio objects and associated with them optical host galaxies, containing 32,616 galaxies with a FIRST core within 3 arcsec of the optical position. All listed objects possess the good quality SDSS DR 7 spectra with the signal-to-noise ratio > 10 and spectroscopic redshifts up to z = 0.6. The radio morphology classification was performed by a visual examination of the FIRST and the NVSS contour maps overlaid on a DSS image, while an optical morphology classification was based on the 120 arcsec snapshot images from SDSS DR 7.

The majority of radio galaxies in ROGUE I, i.e. ∼ 93%, are unresolved (compact or elongated), while the rest of them exhibit extended morphologies, such as Fanaroff-Riley (FR) type I, II, and hybrid, wide-angle tail, narrow-angle tail, head-tail sources, and sources with intermittent or reoriented jet activity, i.e. double–double, X–shaped, and Z–shaped. Most of FR IIs have low radio luminosities, comparable to the luminosities of FR Is. Moreover, due to visual check of all radio maps and optical images, we were able to discover or reclassify a number of radio objects as giant, double–double, X–shaped, and Z–shaped radio galaxies. The presented sample can serve as a database for training automatic methods of identification and classification of optical and radio galaxies.

Type
Contributed Papers
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., et al., 2009, ApJS, 182, 543 10.1088/0067-0049/182/2/543CrossRefGoogle Scholar
Best, P. N., & Heckman, T. M., 2012, MNRAS, 421, 1569 10.1111/j.1365-2966.2012.20414.xCrossRefGoogle Scholar
Condon, J. J., Cotton, W. D., Greisen, E. W., et al., 1998, AJ, 115, 1693 10.1086/300337CrossRefGoogle Scholar
Eisenstein, D. J., Annis, J., Gunn, J. E., et al., 2001, AJ, 122, 2267 10.1086/323717CrossRefGoogle Scholar
Kozieł-Wierzbowska, D. & Stasińska, G., 2017, MNRAS, 415, 1013 10.1111/j.1365-2966.2011.18346.xCrossRefGoogle Scholar
Lin, Y.-T., Shen, Y., Strauss, M. A., Richards, G. T., & Lunnan, R. 2010, ApJ, 723, 1119 10.1088/0004-637X/723/2/1119CrossRefGoogle Scholar
Strauss, M. A., Weinberg, D. H. & Lupton, R. H., 2002, AJ, 124, 1810 10.1086/342343CrossRefGoogle Scholar
White, R. L., Becker, R. H., Helfand, D. J., & Gregg, M. D., 1997, ApJ, 475, 479 10.1086/303564CrossRefGoogle Scholar