The cluster NGC 330 in the SMC - Radial velocities of individual stars

Details The cluster NGC 330 in the SMC - Radial velocities of individual stars The cluster NGC 330 in the SMC - Radial velocities of individual stars

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..285f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 191, Apr. 1980, p. 285-292.

Other

20

Late Stars, Magellanic Clouds, Radial Velocity, Star Clusters, Stellar Spectrophotometry, Supergiant Stars, Binary Stars, Stellar Mass

Scientific paper

Radial velocities based on 81 image tube spectra at 30 A/mm are given for 25 stars (17 early type supergiants or upper main sequence stars and eight late type stars) in the young SMC cluster NGC 330. An upper (one standard deviation) limit to the velocity dispersion is found to be 2 Km/s. The mass-to-light ratio is likely to be less than 0.1 in solar units. Results for other young Magellanic Cloud clusters derived on the assumption that they are tidally limited are consistent with this result. Spectroscopic binaries with semi-amplitudes greater than about 10 Km/s appear to be rare or absent amongst the stars studied.

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