Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-04-24
Astronomy and Astrophysics
Astrophysics
Proceedings of invited paper at ADELA 08
Scientific paper
Multi-epoch radio-interferometric observations of young stellar objects can be used to measure their displacement over the celestial sphere with a level of precision that currently cannot be attained at any other wavelength. In particular, the accuracy achieved using carefully calibrated, phase-referenced observations with the Very Long Baseline Array is better than 50 micro-arcseconds. This is sufficient to measure the trigonometric parallax and the proper motion of any radio-emitting young star within several hundred parsecs of the Sun with an accuracy better than a few percents. Taking advantage of this situation, we have initiated a large project aimed mainly at measuring the distance to the nearest regions of star-formation (Taurus, Ophiuchus, Perseus, etc.). Here, we will present the results for several stars in Taurus and Ophiuchus, and show that the accuracy obtained is already more than one order of magnitude better than that of previous estimates. The proper motion obtained from the data can also provide important information, particularly in multiple stellar systems. To illustrate this point, we will present the case of the famous system T Tauri, where the VLBA data provide crucial information for the characterization of the orbital path.
Loinard Laurent
Miguel Torres R.
Mioduszewski Amy J.
Rodriguez Luis F.
No associations
LandOfFree
Very Long Baseline Array astrometry of low-mass young stellar objects does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Very Long Baseline Array astrometry of low-mass young stellar objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Very Long Baseline Array astrometry of low-mass young stellar objects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-728059