New fundamental parameters for the inner disk open cluster Lyngå 11

PIATTI, ANDRÉS E.; CLARIA OLMEDO, JUAN JOSÉ; AHUMADA, A.V.

NEW ASTRONOMY

Año: 2006 vol. 11 p. 262 - 272

1384-1076

We have obtained CCD BVIKC photometry down to V ˜ 21.5 for the open cluster Lyngå 11 and its surrounding field. This previously unstudied object appears to be rich and highly absorbed. A cluster angular radius of 4.5′ ± 0.5′, equivalent to (3.0 ± 0.3) pc, is estimated from star counts in 100-pixel a side boxes distributed throughout the whole observed field. Our analysis suggests that Lyngå 11 is moderately young and probably of solar metallicity. Adopting the theoretical metal content Z = 0.02, which provides the best global fit, we derive an age of (630 ± 70) Myr. Simultaneously, colour excesses E(B ‑ V) = 0.70 and E(V ‑ I) = 0.85 and an apparent distance modulus V ‑ MV = 14.0 are obtained. These results place Lyngå 11 at a distance of (2.3 ± 0.5) kpc from the Sun and ˜6.5 kpc from the Galactic centre. The properties of a sample of clusters aligned along the line-of-sight of Lyngå 11 are examined as well.