Release 11.12 ("Hergest Ridge")


Selected: Lynga 7

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Parameters
Positional Parameters
clusterLynga 7
RA16 11 03.65
Declination-55 19 04.0
Galactic longitude328.77
Galactic latitude-2.8
R sun8
R gc4.3
X6.8
Y-4.1
Z-0.4
Photometric Parameters
E (B-V)0.73
V HB17.43
(m-M)16.78
Vt0
MVt-6.6
HBR-1
hbt7
Structural Parameters
[Fe / H]-1.01
v_r8
err5
v_LSR8
c0.95
r_c0.9
r_h1.2
lg(tc)0
lg(th)8.83
mu_V0
rho_v0
Color-magnitude diagrams
authorBonatto, C.; Bica, E.
titleStructural parameters of 11 faint Galactic globular clusters derived with 2MASS
journalAstronomy and Astrophysics, Vol. 479, pp.741-750
CM diagram
CreditsCluster image: courtesy of SEDS page
Description of Lynga 7

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.

Source: SEDS page | Notify inaccuracies

Image

Image of the cluster from the Digital Sky Survey

Other Resources
for Lynga 7
ADS "Object Search"
SEDS data
Web Links for this cluster
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Selected biblio
Paper n. 1
Bonatto, C.; Bica, E.
Structural parameters of 11 faint Galactic globular clusters derived with 2MASS
2008, Astronomy and Astrophysics, Vol. 479, pp.741-750
(IC 1257 Lynga 7 Terzan 4 Terzan 10 BH 176 1636-283 ESO280-SC06 2MASS-GC01 2MASS-GC02 GLIMPSE-C01 AL 3 )
Paper n. 2
Sarajedini, Ata
The 2MASS Color-Magnitude Diagram of the Globular Cluster Lynga 7
2004, The Astronomical Journal, Volume 128, Issue 3, pp. 1228-1232
(Lynga 7 )
Paper n. 3
Ortolani, S.; Bica, E.; Barbuy, B.
Lynga 7 : a new disk globular cluster ?
1993, Astron. Astrophys., 273, 415-420 (1993)
(Lynga 7 cmd )
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