Issue |
A&A
Volume 382, Number 1, JanuaryIV 2002
|
|
---|---|---|
Page(s) | 178 - 183 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20011589 | |
Published online | 15 January 2002 |
New binary stars discovered by lunar occultations. VI. *
1
European Southern Observatory, Karl-Schwarzschildstr. 2, 85748 Garching bei München, Germany
2
Osservatorio Astrofisico di Arcetri, Largo E. Fermi, 5, 50125 Firenze, Italy
3
Thüringer Landessternwarte Tautenburg, Sternwarte 5, 07778 Tautenburg, Germany
Corresponding author: A. Richichi, arichich@eso.org
Received:
12
September
2001
Accepted:
8
November
2001
We present additional results from our ongoing lunar occultation program.
Observations are presented
here for a total of seventeen sources,
for the majority of which one or two new companions
are detected. The sample comprises mostly
field stars, spanning a large range of spectral types.
Two infrared objects without optical counterpart are
also included.
The range of projected separations is to
.
We report on the following binary stars:
IRAS 16576-2116,
IRAS 19495-1628,
IRAS 18033-1955,
CGCS 3964,
SAO 94064,
EI Tau,
SAO 93950,
SAO 79217,
SAO 79285 and
SAO 80075.
We found
HD 247924 and
SAO 139322 to be triple systems.
In the case of
SAO 93950, the revised analysis of two occultation
events has provided the true position angle and separation
of this system.
We also observed the young T Tauri star
GG Tau A, where we detected a significant orbital
motion with respect to the latest available measurements.
In two cases,
SAO 79285 and SAO 139322, a companion
was already claimed on the basis of Hipparcos
results, but our observations are not entirely
consistent with these latter.
Finally, our sample includes four stars known to be binary,
namely SAO 186497, SAO 162183,
SAO 96753 and
SAO 161192,
for which we did not detect a companion. Among these,
our negative detection of the companion of
SAO 162183
poses strong constraints on the parameters of this
presumed binary.
Key words: astrometry / occultations / binaries: close / binaries: spectroscopic / binaries: visual / stars: individual: GG Tau A
© ESO, 2002
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