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1960•The Astronomical JournalOpen access

The Barred Spiral Galaxy NGC 7479.

E. M. Burbidge, G. R. Burbidge, K. H. Prendergast

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Abstract

The galaxy NGC 7479 has been classified SBb in Hubble's original scheme, and fB2 by Morgan. As compared with the essentially stellar bars of many barred spirals, the bar in NGC 7479 appears to have many Hii regions along it, making it a promising object for a study of rotation by means of the Ha emission line. Velocities along the bar and at a few points outside have been measured with the primefocus spectrograph of the 82-inch telescope, by means of the Ha and LNiiJ emission lines. The rotation curve for the bar and points outside is shown. A preliminary estimate of the mass of the bar is given, and some ideas concerning the structure of barred spirals are discussed.

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What this paper is about

The galaxy NGC 7479 has been classified SBb in Hubble's original scheme, and fB2 by Morgan. As compared with the essentially stellar bars of many barred spirals, the bar in NGC 7479 appears to have many Hii regions along it, making it a promising object for a study of rotation by means of the Ha emission line. Velocities along the bar and at a few points outside have been measured with the primefocus spectrograph of the 82-inch telescope, by means of the Ha and LNiiJ emission lines. The rotation curve for the bar and points outside is shown. A preliminary estimate of the mass of the bar is given, and some ideas concerning the structure of barred spirals are discussed.

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Available abstract

The galaxy NGC 7479 has been classified SBb in Hubble's original scheme, and fB2 by Morgan. As compared with the essentially stellar bars of many barred spirals, the bar in NGC 7479 appears to have many Hii regions along it, making it a promising object for a study of rotation by means of the Ha emission line. Velocities along the bar and at a few points outside have been measured with the primefocus spectrograph of the 82-inch telescope, by means of the Ha and LNiiJ emission lines. The rotation curve for the bar and points outside is shown. A preliminary estimate of the mass of the bar is given, and some ideas concerning the structure of barred spirals are discussed.

Key concepts: Physics, Barred spiral galaxy, Unbarred spiral galaxy, Grand design spiral galaxy, Interacting galaxy, Irregular galaxy, Astronomy, Hubble sequence

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