Título: The 3D velocity structure of the planetary nebula NGC 7009
Autores: Steffen,W.
Espíndola,M.
Martínez,S.
Koning,N.
Fecha: 2009-10-01
Publicador: SCIELO
Fuente:
Tipo: journal article
Tema: ISM: jets and outflows
planetary nebulae: individual (NGC 7009)
stars: AGB and post-AGB
stars: mass loss
Descripción: In search for deviations from homologous expansion in planetary nebulae we present a 3D morphokinematical model of NGC 7009. The model has been constructed with Shape based on PV diagrams from the literature and HST images. We find that the data are consistent with a radial velocity field with increased gradient at high latitudes compared to the equatorial region (Model 1). In a second model we assume a linearly increasing radial velocity component with an added poloidal component of order 10 km s-1 at latitudes around 70°. The true velocity field is likely to be in between these two limiting cases. We also find that the expansion of the ansae is non-radial with reference to the central star. Their velocity field is focused near the apparent exit points from the main shell. We predict the proper motion pattern for the model with a non-zero poloidal velocity component.
Idioma: Inglés

Artículos similares:

Fracturas maxilofaciales y factores asociados en derechohabientes del IMSS Campeche, México: Análisis retrospectivo 1994-1999 por Medina-Solis,Cario Eduardo,Córdova-González,José Luis,Casanova-Rosado,Alejandro José,Zazueta-Hernández,Maria Alejandra
Factores de riesgo de mortalidad en el hijo de madre toxémica por Gómez-Gómez,Manuel,Danglot-Banck,Cecilia,García-de la Torre,Guadalupe Silvia,Antonio-Ocampo,Abdiel,Fajardo-Gutiérrez,Arturo,Sánchez-García,Maria Luisa,Ahumada-Ramírez,Elias
Cerámicas mexicanas para cicatrización de piel por Piña-Barba,María Cristina,Tejeda-Cruz,Adriana,Regalado-Hernández,Miguel Ángel,Arenas-Reyes,María Isabel,Martín-Mandujano,Salvador,Montalvo,César
Seguimiento de egresados de un diplomado en enseñanza de la Medicina por Ponce de León-Castañeda,Ma. Eugenia,Ruíz-Alcocer,Ma. del Carmen,Lozano-Sánchez,J. Rogelio
Primer estudio de teledermatología en México: Una nueva herramienta de salud pública por Lepe,Verónica,Moneada,Benjamín,Castanedo-Cázares,Juan Pablo,Martínez-Rodríguez,Alejandra,Mercado-Ceja,Sergio M,Gordillo-Moscoso,Antonio
10