The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1.

Details The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1. The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1.

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...301..381b&link_type=abstract

Astronomy and Astrophysics, v.301, p.381

Statistics

53

Methods: Data Analysis, Stars: Hr-Diagram, Statistics, Galaxy: Centre, Stellar Content, Structure

Scientific paper

The results are presented from a study of Colour-Magnitude Diagrams in three fields, located in the galactic plane towards the Galactic Centre. First the extinction is determined in the line of sight. In two fields a significant increase in the absorption is found. For the field near Terzan 1 the increase starts immediately at 0kpc in the line of sight and for the field near NGC 6603 it occurs between 3.5kpc and 4.0kpc. The latter apparently coincides with the position of the molecular ring. The abrupt end in the steep increment in the absorption is likely the result of gas consumption by star formation. In two fields a significant increase in the number of stars with probably a contribution from a stellar ring has been found. The stellar ring can be described with a Gaussian centered around 3.5kpc from the Galactic Centre with σ_ring_=0.5kpc. Between 1.0 to about 3.0kpc in the line of sight a stellar contribution is present from the Sagittarius spiral arm. In the fields near the clusters Lynga 7 and Terzan 1 relatively young stars are present from a recent burst of star formation. The field of NGC 6603 crosses a patchy region in this arm where this recent burst is absent. In all fields the major contribution for V<22mag is due to disc stars. Around 2.5kpc from the Galactic Centre we find a sharp drop in the stellar density of the disc. The stellar density towards the Galactic Centre is still increasing due to the stellar contribution from the Bulge. Therefore we identify this as the disc/bulge transition. For the Bulge we suggest the presence of a super metal rich population.

Affiliated with

Also associated with

No associations

Rating

The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The galactic structure towards the galactic centre. II. A study of the fields near the clusters NGC 6603, Lynga 7 and Terzan 1. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-821194