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3C 273 : A Star-Like Object with Large Red-Shift

Nature volume 197, page 1040 (1963)Cite this article

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THE only objects seen on a 200-in. plate near the positions of the components of the radio source 3(7 273 reported by Hazard, Mackey and Shimmins in the preceding article are a star of about thirteenth magnitude and a faint wisp or jet. The jet has a width of 1∗2∗ and extends away from the star in position angle 43. It is not visible within 11" from the star and ends abruptly at 20" from the star. The position of the star, kindly furnished by Dr. T. A. Matthews, is R.A. 12h26m33-35s ±0-04s, Decl. +2 19'42-0" ±0-5" (1950), or 1" east of component B of the radio source. The end of the jet is 1" east of component A. The close correlation between the radio structure and the,star with the jet is suggestive and intriguing.

Spectra of the star were taken with the prime-focus spectrograph at the 200-in. telescope with dispersions of 400 and 190 A per mm. They show a number of broad omission features on a rather blue continuum. The most prominent features, which have widths around 50 A, are, in order of strength, at 5632, 3239, 5792, 5032 A. These and other weaker emission bands are listed in the first column of Table 1. For three faint bands with widths of 100-200 A the total range of wave-length is indicated.

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  1. Mount Wilson and Palomar Observatories, Carnegie Institution of Washington, California Institute of Technology, Pasadena https://www.nature.com/nature

    M. SCHMIDT

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SCHMIDT, M. 3C 273 : A Star-Like Object with Large Red-Shift. Nature 197, 1040 (1963). https://doi.org/10.1038/1971040a0

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