| Author(s): |
Total Authors: 3
|
| Affiliation: | [1] Univ Sao Paulo, Dept Astron, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA; v. 47, n. 1, p. 49-61, APR 2011. |
| Web of Science Citations: | 10 |
| Abstract | |
In this work, a sample of planetary nebulae located in the inner-disk and bulge of the Galaxy is used in order to find the galactocentric distance which better separates these two populations, from the point of view of abundances. Statistical distance scales are used to study the distribution of abundances across the disk-bulge interface. A Kolmogorov-Smirnov test is used to find the distance at which the chemical properties of these regions better separate. The results of the statistical analysis indicate that, on the average, the inner population has lower abundances than the outer. Additionally, for the a-element abundances, the inner population does not follow the disk radial gradient towards the galactic center. Based on our results, we suggest a bulge-disk interface at 1.5 kpc, marking the transition between the bulge and inner-disk of the Galaxy as defined by the intermediate mass population. (AU) | |
| FAPESP's process: | 07/07704-2 - Populations and evolution of the bulge and the central region of the Galaxy |
| Grantee: | Oscar Cavichia de Moraes |
| Support Opportunities: | Scholarships in Brazil - Doctorate |