Star formation in globules in IC1396

Abstract

We present a large-scale study of the IC1396 region using new deep NIR and optical images, complemented by 2MASS data. For ten globules in IC1396 we determine (H-K, J-H) colour-colour diagrams and identify the young stellar population. Five of these globules contain a rich population of reddened objects, most of them probably young stellar objects. Two new HH objects (HH865 and HH864) could be identified by means of [SII] emission, one of them a parsec-scale flow. Using star counts based on 2MASS data we create an extinction map of the whole region. This map is used to identify 25 globules and to estimate their mass. The globule masses show a significant increase with the distance from the exciting O6.5V star HD206267. We explain this correlation by the enhanced radiation pressure close to this star, leading to evaporation of the nearby clouds and hence smaller globule masses. We see evidence that the radiation from HD206267 has a major impact on the star formation activity in these globules.

13 pages, 14 figures, A&A accepted, version with high resolution figures at http://www.dias.ie/~df/

References in corpus (4)

• Protostars in the Elephant Trunk Nebula
• IRAS 21391+5802: The Molecular Outflow and its Exciting Source
• Star Formation in Bright Rimmed Clouds. I. Millimeter and Submillimeter Molecular Line Surveys
• Young Stars and Outflows in the globule IC1396W

Cited by in corpus (14)

• X-ray Study of Triggered Star Formation and Protostars in IC 1396N
• A Chandra Study of the Rosette Star-Forming Complex. I. The Stellar Population and Structure of the Young Open Cluster NGC 2244
• T Tauri candidates and accretion rates using IPHAS: method and application to IC1396
• The Elephant Trunk Nebula and the Trumpler 37 cluster: Contribution of triggered star formation to the total population of an HII region
• Sequential star formation in a cometary globule (BRC37) of IC1396
• Properties of protostars in the Elephant Trunk globule IC 1396A
• Young Stellar Population of the Bright-Rimmed Clouds BRC 5, BRC 7 and BRC 39
• A Galactic Plane Relative Extinction Map from 2MASS
• Magnetic fields in multiple bright-rimmed clouds in different directions of H II region IC1396 - II
• Membership analysis and 3D kinematics of the star-forming complex around Trumpler 37 using Gaia-DR3
• The embedded cluster or association Trumpler 37 in IC1396: a search for evolutionary constraints
• Number ratios of young stellar objects in embedded clusters
• A near-infrared variability study in the cloud IC1396W: low star-forming efficiency and two new eclipsing binaries
• Sequential clustering of star formation in IC 1396