| Texto completo | |
| Autor(es): |
Kovtyukh, V. V.
[1, 2]
;
Andrievsky, S. M.
[1, 2, 3]
;
Martin, R. P.
[4, 5]
;
Korotin, S. A.
[6]
;
Lepine, J. R. D.
[7]
;
Maciel, W. J.
[7]
;
Keir, L. E.
[1]
;
Panko, E. A.
[8]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Odessa Natl Univ, Astron Observ, Shevchenko Pk, UA-65014 Odessa - Ukraine
[2] Isaac Newton Inst Chile, Odessa Branch, Shevchenko Part, UA-65014 Odessa - Ukraine
[3] Univ Paris Diderot, Observ Paris Meudon, CNRS, GEPI, F-92125 Meudon - France
[4] Univ Hawaii Hilo, Dept Phys & Astron, Hilo, HI 96720 - USA
[5] Univ Hawaii, Infrared Telescope Facil, Honolulu, HI 96822 - USA
[6] Crimean Astrophys Observ, Nauchny 298409, Republic Of Cri - Russia
[7] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo, SP - Brazil
[8] Odessa Natl Univ, Dept Theoret Phys & Astron, 42 Pasteur Str, Odessa - Ukraine
Número total de Afiliações: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 489, n. 2, p. 2254-2260, OCT 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
We have made the first attempt to derive the chemical properties of the Galactic disc at its very central part using high-resolution infrared spectroscopic observations of four classical Cepheids. These stars are located at Galactocentric distances smaller than 1 kpc. All investigated stars show near-to-solar elemental abundances. By combining these new data with our previous studies, our results suggest that the radial distribution of iron abundance on a logarithmic scale gradually increases from the outskirts of the Galactic disc to Galactocentric distances of about 2-4 kpc. There, it reaches a maximal value of about +0.4 dex, and then declines sharply to about the solar value at the Galactic Centre. (AU) | |
| Processo FAPESP: | 10/18835-3 - Nebulosas planetárias, estrelas e evolução química de sistemas estelares |
| Beneficiário: | Roberto Dell'Aglio Dias da Costa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 18/04562-7 - IAU Symposium 343: Why Galaxies Care About AGB Stars |
| Beneficiário: | Walter Junqueira Maciel |
| Modalidade de apoio: | Auxílio à Pesquisa - Reunião - Exterior |