Westerlund 1 is the most important starburst cluster in the Galaxy due to its massive star
content. We have performed BVI C and JK S photometry to investigate the initial mass …

We investigate the nature of four young and low-mass open clusters (OCs) located in the
second and third quadrants with near-infrared Two-Micron All Sky Survey (2MASS) …

We present a catalogue of 618 high-amplitude infrared variable stars (1< Δ K< 5 mag)
detected by the two widely separated epochs of 2.2 μm data in the UKIDSS Galactic plane …

The very young open cluster (OC) NGC 2244 in the Rosette Nebula was studied with field-
star-decontaminated Two-Micron All-Sky Survey (2MASS) photometry, which shows the …

ABSTRACT The Vulpecula OB association, Vul OB1, is a region of active star formation
located in the Galactic plane at 2.3 kpc from the Sun. Previous studies suggest that …

Hierarchical star formation leads to a progressive decrease in the clustering of star clusters
both in terms of spatial scale and age. Consistently, statistical analysis of the positions and …

Context. Elemental abundance gradients in galactic disks are important constraints for
models of how spiral galaxies form and evolve. However, the abundance structure of the …

Jets and outflows are the early signposts of stellar birth. Using the UKIRT Wide Field Infrared
Survey for H2 (UWISH2) at 2.12 μ m, 127 outflows are identified in molecular cloud …

Context. Since most of the star clusters do not survive the embedded phase, their early
dissolution appears to be a major source of field stars. However, catching a cluster in the act …

Aims. Astrophysical parameters (age, reddening, distance, core and cluster radii) of 14 open
clusters (OCs) projected close to the Galactic plane are derived with 2MASS photometry …