Globular Cluster Lynga 7,
Discovered 1964 by G. Lynga.
- Distance from Sun:
- 26.1 kly
- Distance from Galactic Center:
- 14.0 kly
- Apparent Diameter:
- arc min
- 10.18 mag vis
- Radial Velocity:
- +8.0 +/- 5.0 km/s
- Abs. Mag:
- -6.60 Mag vis
Recognized as globular cluster in 1993 by Ortolani, Bica and Barbuy.
Globular cluster Lynga 7 was first cataloged by
G. Lynga (1964) as open cluster and classified as
of Trumpler type II 2 p. It is listed again as open cluster by
van den Bergh-Hagen (1975) as vdB-Ha 184.
It was only in 1993 that Ortolani, Bica and Barbuy
brought up evidence that this object might be a globular cluster. They
investigated its color-magnitude diagram, which resembles that of a globular,
but derive a significantly lower age than for the usual globular clusters, and
classify it as a disk globular cluster. Similar results were obtained by
Tavarez and Friel (1995).
Meanwhile, Lynga 7 is generally regarded as globular.
Lynga 7 is one of the more "metal-rich" globulars, i.e. its stars contain
significantly higher concentrations of elements heavier than Helium than
average globulars, more similar to the composition of our Sun.
The image in this page in an IR photograph obtained within the
Two Micron All Sky Survey (2MASS)
and taken from the 2MASS atlas. Colors represent different IR bands: J band (1.2
micron) is represented blue, H (1.6 micron) green, and Ks light (2.2 micron)
- G. Lynga, 1964.
Studies of the Milky Way from Centaurus to Norma. II. Open clusters.
Lund Medd. Astron. Obs. Ser. II, No. 140
Table III: 14 suspected new [open] clusters.
- S. Ortolani, E. Bica and B. Barbuy, 1993.
Lynga 7 : a new disk globular cluster ?
Astronomy and Astrophysics, Vol. 273, pp. 415-420 (06/1993)
- Maritza Tavarez and Eileen D. Friel, 1995.
Lynga 7: Old Open Cluster or Globular Cluster?
Astronomical Journal, Vol. 110, pp. 223-227 (07/1995)
- Sidney van den Bergh and Gretchen L. Hagen, 1975.
Uniform survey of clusters in the Southern Milky Way.
Astronomical Journal, Vol. 80, pp. 11-16 (01/1975)
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