Diameters of Open Star Clusters

Abstract

The present paper presents a tabulation of data on all 600 Galactic open clusters for which it is presently possible to calculate linear diameters. As expected, the youngest `clusters' with ages < 15 Myr, contain a significant (greater than or equal to 20%) admixture of associations. Among intermediate-age clusters, with ages in the range 15 Myr to 1.5 Gyr, the median cluster diameter is found to increase with age. Small compact clusters are rare among objects with ages > 1.5 Gyr. Open clusters with ages > 1 Gyr appear to form what might be termed a `cluster thick disk', part of which consistst of objects that were probably captured gravitationally by the main body of the Galaxy.

Astronomical Journal, in press

References in corpus (13)

• New catalogue of optically visible open clusters and candidates
• The properties of Galactic globular cluster sub-systems
• Direct determination of the spiral pattern rotation speed of the Galaxy
• Globular clusters and the formation of the outer Galactic halo
• Probing disk properties with open clusters
• HST observations of star clusters in NGC 1023: Evidence for three cluster populations?
• Star Clusters in the Galactic Anticenter Stellar Structure and the Origin of Outer Old Open Clusters
• Color--Magnitude Diagrams and Luminosity Functions down to the Hydrogen Burning Limit. III. A Preliminary HST Study of NGC6791
• The core of the Canis Major galaxy as traced by Red Clump stars
• Interstellar extinction towards open clusters and galactic structure
• A radial velocity survey of low Galactic latitude structures: I. Kinematics of the Canis Major dwarf galaxy
• The INT/WFC survey of the Monoceros Ring: Accretion origin or Galactic Anomaly?
• Photometry and Spectroscopy of Old, Outer Disk Star Clusters: vdB-Hagen 176, Berkeley 29 and Saurer 1

Cited by in corpus (20)

• The GRIFFIN project -- Formation of star clusters with individual massive stars in a simulated dwarf galaxy starburst
• Displacement of the Sun from the Galactic Plane
• If it does not kill them, it makes them stronger: collisional evolution of star clusters with tidal shocks
• The challenge of simulating the star cluster population of dwarf galaxies with resolved interstellar medium
• A Census of Blue Stragglers in Gaia DR2 Open Clusters as a Test of Population Synthesis and Mass Transfer Physics
• A Comprehensive study of open clusters Czernik 14, Haffner 14, Haffner 17 and King 10 using multicolour photometry and Gaia DR2 astrometry
• On the Origin of Sub-subgiant Stars. III. Formation Frequencies
• The low mass star and sub-stellar populations of the 25 Orionis group
• The list of possible double and multiple open clusters between galactic longitudes 240 and 270 degrees
• On the Origin of High-Altitude Open Clusters in the Milky Way
• The Absolute Magnitudes of Red Horizontal Branch Stars in the ugriz System
• Explaining the Praesepe blue straggler HD 73666
• Astrophysics in 2006
• NGC 1252: a high altitude, metal poor open cluster remnant
• A chemical and kinematical analysis of the intermediate-age open cluster IC 166 from APOGEE and Gaia DR2
• The Southern Flanking Fields of the 25 Orionis Group
• Gravitational interactions between globular and open clusters: an introduction
• The physical association of planetary nebula NGC 2818 with open cluster NGC 2818A
• Open superclusters I: The most populated primordial groups of open clusters in the third quadrant of the Galactic disc
• Simulating Eclipsing Binary Yields of the Rubin Observatory in the Galactic Field and Star Clusters