Investigating star formation in the young open cluster NGC 6383
Abstract
Context: By studying young open clusters, the mechanisms important for star formation over several Myr can be examined. For example, accretion rate as a function of rotational velocity can be investigated. Similarly, sequential star formation triggered by massive stars with high mass-loss rates can be studied in detail.
Aims: We identified and characterized probable members of NGC 6383, as well as determined cluster parameters.
Methods: New Strömgren uvby CCD photometry, obtained by us, is presented. This new data, together with Johnson UBV and 2MASS data in the NIR, was used to investigate characteristics of pre- as well as zero age main sequence cluster members.
Results: We present Strömgren uvby CCD photometry for 272 stars in the field of NGC 6383 and derive its reddening, E(b-y) = 0.21(4) mag, as well as distance, d = 1.7(3) kpc from the Sun. Several stars with NIR excess and objects in the domain of the classical Herbig Ae/Be and T Tauri stars were detected. Two previously known variables were identified as rapidly-rotating PMS stars. The field population is clearly separated from the probable members in the color-magnitude diagram.
Conclusions: . NGC 6383 is a young open cluster, with an age of less than 4 Myr, undergoing continuous star formation. True pre-main sequence members might be found down to absolute magnitudes of +6 mag, with a variety of rotational velocities and stellar activities.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2007
- DOI:
- 10.1051/0004-6361:20065513
- arXiv:
- arXiv:astro-ph/0611304
- Bibcode:
- 2007A&A...462..157P
- Keywords:
-
- stars: pre-main sequence;
- stars: early-type;
- stars: formation;
- open clusters and associations: individual: NGC 6383;
- Astrophysics
- E-Print:
- 7 pages, 6 figures, accepted by A&