A very bright CH star with a very high radial velocity in the direction of the Large Magellanic Cloud

Details A very bright CH star with a very high radial velocity in the direction of the Large Magellanic Cloud A very bright CH star with a very high radial velocity in the direction of the Large Magellanic Cloud

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...101..226f&link_type=abstract

Astronomy and Astrophysics, vol. 101, no. 2, Aug. 1981, p. 226, 227. In French.

Astronomy and Astrophysics

Astrophysics

3

Hydrocarbons, Magellanic Clouds, Radial Velocity, Stellar Luminosity, Stellar Spectra, Stellar Spectrophotometry, Absorption Spectra, Stellar Magnitude

Scientific paper

The spectral properties of a 13th magnitude star with a radial velocity on the order of 400 km/sec discovered in the area of the Large Magellanic Cloud are reported. Spectra of the star, designated no. 74 in the Woolley (1963) proper motion catalog, were obtained at a dispersion of 80 A/mm with the deformed grating spectrograph at the 152-cm telescope at La Silla. The spectra are characterized by very strong CH absorption bands and a relatively intense UV spectrum, characteristic of CH stars. The positions of the Ca II K and H lines and the H-beta, H-gamma, H-delta and H-8 lines indicate a mean radial velocity of plus 440 km/sec, which is confirmed by the molecular bands. A system of unidentified absorptions is also found, and it is noted that aside from the previously noted Ca II and H lines, no other atomic absorptions have been positively identified. It is concluded that the large positive radial velocity of the star indicates that it is of the halo population.

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