Скачать или смотреть "Distances and Structure of Star-Forming Regions in the Gould's Belt" 19/10/2016

Ponente: Gisela Ortiz (IRyA, UNAM).
Lugar: Auditorio "Paris Pishmish" - Instituto de Astronomía, Ciudad Universitaria, Universidad Nacional Autónoma de México.
Fecha: 19/10/2016.


Resumen:
The structure and dynamics of molecular clouds govern the star formation process as those establish both the rate and location of star formation.
Thus, accurate determinations of the space distribution of molecular clouds are needed. Very Long Baseline Interferometry (VLBI) is a powerful tool
to study astrophysical phenomena with very high angular resolution imaging at radio wavelengths. Besides angular resolution, VLBI also offers
sub-milliarcsecond accuracy for absolute source positions. In this talk, I will introduce a long-term VLBI survey aimed at measuring accurate distances
to individual young stars in most famous clouds belonging to the Gould's Belt. In the near term, these measurements will enable us to determine the
3D structure, as well as the dynamics of each region and the large-scale relative motions of the different clouds in the Belt. I will present recent results
from this project that include the distance determination with a few percent accuracy towards Ophiuchus and Orion, and the resolution of a longstanding
debate on the distance to Serpens.