NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Dynamics of the young LMC cluster NGC 1866The 1.0-m telescope at Las Campanas was used to obtain V-band CCD images of the young LMC cluster NGC 1866 out to a projected radius of 100 pc. Radial velocities with a mean precision of 1.0 km/s were measured for 69 member supergiants using the echelle spectrograph on the 2.5-m telescope. The total cluster luminosity is 6.5 +/-0.3 x 10 exp 5 solar luminosities. A star-subtracted, median-filtered U frame was employed to determine photometric shape parameters. The stellar radial velocities indicate that NGC 1866 has a systemic velocity of 301.2 +/-1.0 km/s. A comparison of the derived values for NGC 1866 and the theoretical nu-0/sigma-0 - epsilon relationship indicates that the observed flattening is consistent with rotation. The quality of the fits for models with rotation is clearly superior to those without, and isotropic orbits agree best with the data in both cases.
Document ID
19920043990
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Fischer, Philippe
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Welch, Douglas L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cote, Patrick
(McMaster University Hamilton, Canada)
Mateo, Mario
(Observatories of the Carnegie Institution of Washington Pasadena, CA, United States)
Madore, Barry F.
(JPL Pasadena, CA, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1992
Publication Information
Publication: Astronomical Journal
Volume: 103
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
92A26614
Funding Number(s)
CONTRACT_GRANT: NAS5-26555
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available