Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...278l..47b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 278, no. 2, p. L47-L50
Astronomy and Astrophysics
Astrophysics
21
A Stars, Astrometry, B Stars, Binary Stars, Emission Spectra, Pre-Main Sequence Stars, Algorithms, Angular Resolution, Guidance Sensors, Hipparcos Satellite, Hubble Space Telescope, Parallax
Scientific paper
We report on the first set of high angular resolution observations with Fine Guidance Sensor (FGS) #3 aboard the Hubble Space Telescope of a sample of T-Tauri and Herbig Ae/Be pre-main sequence stars, which have also been observed with the HIPPARCOS satellite. Among the 5 Ae/Be stars observed so far of particular interest is the new double HIPPARCOS Input Catalog (HIC) 35488 the first close visual pair in this class of stars and possibly a candidate orbital binary. Repeated FGS astrometry combined with the parallaxes provided by HIPPARCOS could yield the first direct determination of the mass of an Ae/Be type pre-main sequence system. Finally, the timely availability of these FGS measurements will help the validation of the algorithms applied to the HIPPARCOS data to detect and possibly measure close pairs.
Badiali Massimo
Barabaro G.
Bastian Ulrich
Bernacca Pier L.
Bucciarelli Beatrice
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