Radio object with continuous optical spectrum information
Radio Objects with Continuous Optical Spectra, (abbr. ROCOS, also referred to as ROCOSes) is a group of about 80 astrophysical objects characterized by optical spectra anomalously devoid of emission or absorption features, which makes it impossible to determine their distances and locations in relation to our galaxy.[1][2][3] They are considered to be a subclass of blazars, and are similar in their spectral characteristics to DC-dwarfs and single stellar-mass black holes.[4]
^Beskin, G. M.; Efimov, Y. S.; Neizvestni, S. I.; Pustilnik, S. A.; Shakhovskoi, N. M. (1981). "Radio Objects with a Continuous Optical Spectrum - Part One - an Optical Polarization Survey". Soviet Astronomy Letters. 7. American Institute of Physics: 391. Bibcode:1981SvAL....7..391B. Retrieved 26 May 2012.
^Lipovetskii, V. A.; Pustilnik, L. A.; Pustilnik, S. A.; Shapovalova, A. I. (Nov 1989). "Radio Objects with Continuous Optical Spectra - Search for Spectral Features Using the 6-METER Telescope". Soviet Astronomy. 33 (6). American Institute of Physics: 585. Bibcode:1989SvA....33..585L. Retrieved 26 May 2012.
^Lipovetskii, V. A.; Pustil'nik, L. A.; Pustil'nik, S. A.; Shapovalova, A. I. (Nov–Dec 1989). "A study of radio objects with continuous optical spectra - Search for spectral features with the six-meter telescope". Astronomicheskii Zhurnal. 66. The Smithsonian/NASA Astrophysics Data System: 1132–1141. Bibcode:1989AZh....66.1132L. ISSN 0004-6299.
^Matt, Giorgio (2007). Black Holes from Stars to Galaxies, Across the Range of Masses: Proceedings of the 238th Symposium of the International Astronomical Union, Held in Prague, Czech Republic August 21-25, 2006. Cambridge University Press. p. 160. ISBN 9780521863476. Retrieved 26 May 2012.
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