INVESTIGADORES
GAMEN Roberto Claudio
congresos y reuniones científicas
Título:
NIP of Stars: early results and new eclipsing binaries
Autor/es:
JAQUE ARANCIBIA, M.; BARBÁ, R.; MORRELL, N. I.; ROMAN LOPES, A.; TORRES ROBLEDO, S.; GUNTHARDT, G.; SOTO, M.; FERRERO, G.; ARIAS, J.; GAMEN, R. C.; FERNANDEZ LAJUS, E.
Lugar:
Florianópolis
Reunión:
Congreso; XIV Latin American Regional IAU Meeting; 2013
Institución organizadora:
IAU
Resumen:
We have performed a near-infrared photometric monitoring of 39 galactic
young star clusters and star-forming regions, known as NIP of Stars,
between the years 2009-2011, using the Swope telescope at Las Campanas
Observatory (Chile) and the RetroCam camera, in H- and Y-bands. This
monitoring program is complementary to the Vista Variables in the Via
Láctea (VVV), as the brightest sources observed in NIP of Stars
are saturated in VVV. The aim of this campaign is to perform a census of
photometric variability of such clusters and star-forming regions, with
the main goal of discovering massive eclipsing binary stars. In this
work, we present a preliminary analysis of this photometric monitoring
program with the discovery of tens of candidates for variable stars,
among them candidates for massive eclipsing binaries. We included also
to the analysis of variability, a small set of images obtained in the Ks
with the VISTA telescope in the framework of VVV survey (Minniti et al.
2010). In special, we announce the infrared discovering of four massive
eclipsing binaries in the massive young cluster NGC 3603. The stars have
been classified spectroscopically as O-type stars, and one of them, MTT
58, has a rare star with a spectral type of O2 If*/WN6, as one of its
components. We present a preliminary analysis of the light-curves of
these binaries.