W. J. Maciel*, R. D. D. Costa**, and T. E. P. Idiart***
Instituto de Astronomia, Geofísica e Ciências Atmosféricas Universidade de São Paulo, Rua do Matão 1226, CEP 05508-900, São Paulo SP, Brazil. (*maciel@astro.iag.usp.br,** roberto@astro.iag.usp.br,*** thais@astro.iag.usp.br).
Received 2009 February 16
Accepted 2009 April 16
RESUMEN
]]> La determinación precisa de las abundancias químicas en las nebulosas planetarias (PN) de diferentes galaxias nos permite obtener importantes límites para los modelos de evolución química en estos sistemas. Tenemos un programa a largo plazo para derivar abundancias en las galaxias del Grupo Local, en particular, la Nube Mayor y la Nube Menor de Magallanes. En este trabajo presentamos nuestros resultados para estos objetos,y discutimos sus implicaciones en el contexto de nuevas determinaciones de abundancias reportadas en la literatura. En particular, obtenemos correlaciones independientes de la distancia que involucran al He, N, O, Ne, S y Ar, comparamos los resultados con datos sobre nuestra propia galaxia y otras del Grupo Local. Como resultado de nuestras observaciones, hemos obtenido una gran base de datos, por lo cual podemos obtener límites confiables a los procesos de nucleosíntesis en las estrellas progenitoras en galaxias de diferentes metalicidades.
ABSTRACT
The determination of accurate chemical abundances of planetary nebulae (PN) in different galaxies allows us to obtain important constraints on chemical evolution models for these systems. We have a long–term program to derive abundances in the galaxies of the Local Group, particularly the Large and Small Magellanic Clouds. In this work, we present our new results on these objects and discuss their implications in view of recent abundance determinations in the literature. In particular, we obtain distance–independent correlations involving He, N, O, Ne, S, and Ar, and compare the results with data from our own Galaxy and other galaxies in the Local Group. As a result of our observational program, we have a large database of PN in the Galaxy and the Magellanic Clouds, so that we can obtain reliable constraints on the nucleosynthesis processes in the progenitor stars in galaxies of different metallicities.
Key Words: galaxies: abundances — galaxies: individual (Magellanic Clouds) — ISM: planetary nebulae: general.
DESCARGAR ARTÍCULO EN FORMATO PDF
REFERENCES
Bernard–Salas, J., Pottasch, S. R., Gutenkunst, S., Morris, P. W., & Houck, J. R. 2008, ApJ, 672, 274 [ Links ]
Buzzoni, A., Arnaboldi, M., & Corradi, R. L. M. 2006, MNRAS, 368, 877 [ Links ]
Ciardullo, R. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 325 [ Links ]
Costa, R. D. D., de Freitas Pacheco, J. A., & Idiart, T. E. P. 2000, A & AS, 145, 467 [ Links ]
Costa, R. D. D., Maciel, W. J., & Escudero, A. V. 2008, Baltic Astron., 17, 321 [ Links ]
Cuisinier, F., Maciel, W. J., Köppen, J., Acker, A., & Stenholm, B. 2000, A & A, 353, 543 [ Links ]
de Freitas Pacheco, J. A., Barbuy, B., Costa, R. D. D., & Idiart, T. E. P. 1993a, A & A, 271, 429 [ Links ]
de Freitas Pacheco, J. A., Costa, R. D. D., & Maciel, W. J. 1993b, A & A, 279, 567 [ Links ]
Escudero, A. V., Costa, R. D. D., & Maciel, W. J. 2004, A & A, 414, 211 [ Links ]
Henry, R. B., Kwitter, K. B., & Balick, B. 2004, AJ, 127, 2284 [ Links ]
Henry, R. B., Skinner, J. N., Kwitter, K. B., & Milingo, J. B. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 417 [ Links ]
Idiart, T. P., Maciel, W. J., & Costa, R. D. D. 2007, A & A, 472, 101 [ Links ]
Jacoby, G. H. 2006, in Planetary Nebulae Beyond the Milky Way, ed. L. Stanghellini, J. R. Walsh, & N. G. Douglas (Heidelberg: Springer), 17 [ Links ]
Kwok, S. 2000, The Origin and Evolution of Planetary Nebulae (Cambridge: Cambridge Univ. Press) [ Links ]
Leisy, P., & Dennefeld, M. 2006, A & A, 456, 451 [ Links ]
Maciel, W. J., Costa, R. D. D., & Idiart, T. E. P. 2006a, in Planetary Nebulae Beyond the Milky Way, ed. L. Stanghellini, J. R. Walsh, & N. G. Douglas (Heidelberg: Springer), 209 [ Links ]
––––––––––. 2008, in IAU Symp. 256, The Magellanic Clouds: Stars, Gas, and Galaxies, ed. J. Th. van Loon & J. M. Oliveira (arXiv:0808.1872) [ Links ]
Maciel, W. J., Lago, L. G., & Costa, R. D. D. 2006b, A & A, 453, 587 [ Links ]
Peimbert, A. 2003, ApJ, 584, 735 [ Links ]
Perinotto, M., Magrini, L., Mampaso, A., & Corradi, R. L. 2006, in Planetary Nebulae Beyond the Milky Way, ed. L. Stanghellini, J. R. Walsh, & N. G. Douglas (Heidelberg: Springer), 232 [ Links ]
Relaño, M., Peimbert, M., & Beckman, J. 2002, ApJ, 564, 704 [ Links ]
Richer, M. G. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 317 [ Links ]
Richer, M. G., & McCall, M. 2006, in Planetary Nebulae beyond the Milky Way, ed. L. Stanghellini, J. R. Walsh, & N. G. Douglas (Heidelberg: Springer), 220 [ Links ]
Shaw, R. A. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 305 [ Links ]
Stanghellini, L. 2009, in IAU Symp. 256, The Magellanic Clouds: Stars, Gas, and Galaxies, ed. J. Th. van Loon & J. M. Oliveira (Dordrecht: Kluwer), 421 [ Links ]
Stanghellini, L., Shaw, R. A., Balick, B., Mutchler, M., Blades, J. C., & Villaver, E. 2003, ApJ, 596, 997 [ Links ]
Stasinska, G. 2004, in Cosmochemistry: The Melting Pot of the Elements, ed. C. Esteban, R. J. García López, A. Herrero, & F. Sánchez (Cambridge: Cambridge Univ. Press), 115 [ Links ]
Stasinska, G., Richer, M. G., & McCall, M. 1998, A & A, 336, 667 [ Links ] ]]>