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Accurate proper motions of the protostellar system VLA1623-2417
Ricardo Hernández Garnica, Laurent Loinard, Carlos Carrasco-González +9
We present a detailed astrometric analysis of the quadruple protostellar system VLA1623-2417, deriving accurate absolute proper motions for components A, B, and W, as well as, for…
VLBA Observations of Strong Anisotripic Radio Scattering towards the Orion Nebula
Marina Kounkel, Lee Hartmann, Laurent Loinard +6
We present observations of VLBA 20, a radio source found towards the edge of the Orion Nebula Cluster (ONC). Nonthermal emission dominates the spectral energy distribution of this…
VLBA determination of the distance to nearby star-forming regions VII. Monoceros R2
Sergio A. Dzib, Gisela N. Ortiz-León, Laurent Loinard +4
We present a series of sixteen Very Long Baseline Array (VLBA) high angular resolution observations of a cluster of suspected low-mass young stars in the Monoceros R2 region. Four…
The Gould's Belt Distances Survey
Laurent Loinard
Very Long Baseline Interferometry (VLBI) observations can provide the position of compact radio sources with an accuracy of order 50 micro-arcseconds. This is sufficient to measure…
VLBA determination of the distance to nearby star-forming regions VI. The distance to the young stellar object HW 9 in Cepheus A
S. Dzib, L. Loinard, Luis F. Rodriguez +2
Using the Very Long Baseline Array (VLBA), we have observed the radio continuum emission from the young stellar object HW 9 in the Cepheus A star-forming region at ten epochs betwe…
Measuring Nearby Star Forming Regions with the VLBA: from the Distance to the Dynamics
Rosa M. Torres
This thesis is part of a large ongoing effort to determine the distance and structure of all star-forming regions within several hundred parsecs of the Sun using radio-interferomet…
VLBA determination of the distance to nearby star-forming regions III. HP Tau/G2 and the three-dimensional structure of Taurus
Rosa M. Torres, Laurent Loinard, Amy J. Mioduszewski +1
Using multi-epoch Very Long Baseline Array observations, we have measured the trigonometric parallax of the weak-line T Tauri star HP Tau/G2 in Taurus. The best fit yields a distan…