Survey of rotation curves for northern spiral edge-on galaxies

Details Survey of rotation curves for northern spiral edge-on galaxies Survey of rotation curves for northern spiral edge-on galaxies

2000-06-12

arxiv.org/abs/astro-ph/0006158v1

Astronomy and Astrophysics

Astrophysics

To be presented at JENAM-2000 (Joint European and National Astronomical Meeting)

Scientific paper

Rotational curves are measured for almost complete sample of 308 northern spiral galaxies using the 6-m telescope. For observations we selected edge-on galaxies from RFGC catalog with apparent axial ratio a/b>8, angular diameter a<2', and declinations delta>+38deg above the Arecibo belt. About 97% of the galaxies are detected in the H-alpha line. For them a typical rotation curve extends till 87% of the standard galaxy radius. The rotation curve amplitude shows close correlation with a width of the HI line. The median radial velocity for the galaxies is 7800 km/sec, and the median maximum of the rotation curves is 137 km/s. These new observational data will be used to study cosmic streamings of galaxies seen on a scale of 200 Mpc.

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