منابع مشابه
Precision Masses of the Low - Mass Binary System Gj 623
We have used Aperture Masking Interferometry and Adaptive Optics (AO) at the Palomar 200” to obtain precise mass measurements of the binary M dwarf GJ 623. AO observations spread over 3 years combined with a decade of radial velocity measurements constrain all orbital parameters of the GJ 623 binary system accurately enough to critically challenge the models. The dynamical masses measured are m...
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We report a dynamical measurement of the mass of the brown dwarf GJ 802B using aperture-masking interferometry and astrometry. In addition, we report the discovery that GJ 802A is itself a close spectroscopic noneclipsing binary with a 19 hr period.We find the mass of GJ 802B to be 0:063 0:005M . GJ 802 has kinematics inconsistent with a young star and more consistent with the thick-disk popula...
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We report seven successful observations of the astrometric binary GJ 164 AB system with aperture masking interferometry. The companion, with a near infrared contrast of 5:1 was detected beyond the formal diffraction limit. Combined with astrometric observations from the literature, these observations fix the parallax of the system, and allow a model-independent mass determination of both compon...
متن کاملUsco 1606 - 1935 : an Unusually Wide Low - Mass Triple System ?
We present photometric, astrometric, and spectroscopic observations of USco160611.9-193532 AB, a candidate ultrawide (∼1600 AU), low-mass (M tot ∼0.4 M ⊙) multiple system in the nearby OB association Upper Scorpius. We conclude that both components are young, comoving members of the association; we also present high-resolution observations which show that the primary is itself a close binary sy...
متن کاملThe magnetically-active, low-mass, triple system WDS 19312+3607
Aims. We investigated in detail the system WDS 19312+3607, whose primary is an active M4.5Ve star previously inferred to be young (τ ∼ 300–500 Ma) based on its high X-ray luminosity. Methods. We collected intermediateand low-resolution optical spectra taken with 2 m-class telescopes, photometric data from the B to 8 μm bands, and data for eleven astrometric epochs with a time baseline of over 5...
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ژورنال
عنوان ژورنال: Astrophysical Bulletin
سال: 2007
ISSN: 1990-3413,1990-3421
DOI: 10.1134/s1990341307020022