IC 711 - The longest head-tail galaxy known

Details IC 711 - The longest head-tail galaxy known IC 711 - The longest head-tail galaxy known

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94....1v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 94, July 1987, p. 1-6.

Astronomy and Astrophysics

Astronomy

10

Astronomical Spectroscopy, Galactic Structure, Radio Galaxies, Visible Spectrum, Astronomical Maps, Centimeter Waves, Spectrum Analysis

Scientific paper

The scale size of the largest structure in head-tail galaxies is not well known. Previous observations of the head-tail galaxy IC 711 (Vallée and Wilson, 1976) have shown its tail to extend 13 arcmin (700 kpc for H0 = 50 km s-1Mpc-1) beyond the optical galaxy, making it then the longest head-tail galaxy known. New observations at a longer wavelength of 74 cm with the synthesis telescope at Penticton show that the radio tail extends still further, to at least 17 arcmin (930 kpc), retaining its status as the longest head-tail galaxy known today. Some theoretical models for the origin of such galaxies are discussed with particular reference to IC 711.

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