THE MEAN RADIAL-VELOCITY OF THE OPEN CLUSTER NGC-6939

Authors
MILONE AAE
Citation
Aae. Milone, THE MEAN RADIAL-VELOCITY OF THE OPEN CLUSTER NGC-6939, Publications of the Astronomical Society of the Pacific, 106(704), 1994, pp. 1085-1090
Citations number
13
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
704
Year of publication
1994
Pages
1085 - 1090
Database
ISI
SICI code
0004-6280(1994)106:704<1085:TMROTO>2.0.ZU;2-J
Abstract
The systematic motion of NGC 6939 is redetermined in light of the sign ificant discrepancies among the published values. Based on the monitor ing of 26 evolved stars during two consecutive seasons and an average of almost 12 spectra per star, we find the cluster's mean radial veloc ity to be - 18.98 km s-1 with an error of +/-0.19 km s-1.