Discussion of a deep blink survey of faint red objects toward the south galactic pole

Astronomy and Astrophysics – Astronomy

Scientific paper

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Dwarf Stars, Galactic Structure, M Stars, Milky Way Galaxy, Southern Sky, Stellar Luminosity, Stellar Spectrophotometry, Late Stars, Photographic Plates, Star Distribution, Stellar Evolution

Scientific paper

About 2600 red objects brighter than R 18m were found in a field of 6 square degrees centered at R.A. 0h46m, Dec. - 27°50' (1950), close to the south galactic pole. These mostly faint objects, unbiased toward high proper motion, were detected in a blink survey on red and blue copies of Mount Palomar Sky Survey plates; coordinates and finding charts of these objects are available upon request. A GRISM spectroscopic plate, taken with the Cerro Tololo 4-m telescope, shows that, up to the limit of this plate, the red objects are all M-type stars. If the scale height of M dwarfs H 260 pc, the surface density of ∼430 red objects per square degree is approximately twice as much as would be expected from Luyten's (1968) luminosity function.

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