IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A study of outflow activity around EGO sources
Autor/es:
C. FARIÑA; S. PARON; M. E. ORTEGA; A. ASTORT; M. RUBIO
Lugar:
Rodas
Reunión:
Workshop; Massive Stars: From α to Ω; 2013
Resumen:
Extended green objects (EGOs) were identified in Spitzer-IRAC images as
they present a particular extended "green" emission at 4.5 μm, hence
their name. An EGO is probably a massive young stellar object driving
outflows, with the extended emission at 4.5 μm likely due to H2 lines
and CO band-heads excited by the shock of the outflow propagating in the
interstellar medium. Therefore, the dedicated observation and study of
EGOs and their close environments can provide additional insight into
our understanding of massive-star formation processes. In this context,
based on previous studies we have selected a set of particularly
interesting EGOs with the aim of analysing and characterising their
outflow activity and its impact on the interstellar medium around them.
This is a work in progress in which new observations at molecular and
near-infrared wavelengths have recently been carried out towards some of
the selected EGOs and more observations will be done in the following
semesters. Here we report the results obtained so far from the data
analysis of the images towards EGO, G45.47+0.05 and EGO, G35.04-0.47.
For these two targets the molecular line observations were acquired
using the Atacama Submillimiter Telescope Experiment (ASTE) and the
near-infrared images for EGO, G45.47+0.05 were taken with Gemini-NIRI.
The near future plans of this project include new images from WHT-LIRIS
for EGO, G035.20-0.74 and EGO, G035.03+0.35.