منابع مشابه
Parallax and masses of α Centauri revisited⋆
Context. Despite the thorough work of van Leeuwen, the parallax of α Centauri is still far from being carved in stone. Any derivation of the individual masses is therefore uncertain, if not questionable. And yet, that does not prevent this system from being used for calibration purpose in several studies. Aims. We aim for more accurate model-free parallax and individual masses of this system. M...
متن کاملHalo structure, masses of dark objects and parallax microlensing
We study the use of parallax microlensing to separate the effects of the mass function of dark massive halo objects (MHOs or ‘machos’) on the one hand and their spatial distribution and kinematics on the other. This disentanglement is supposed to allow a much better determination of the two than could be achieved entirely on the basis of the durations of events. We restrict our treatment to the...
متن کاملTHE RRd MASSES REVISITED
We reexamine the RRd mass determination using both new and previously existing linear pulsation models. Our conclusion is that the weight of evidence remains strongly with the" canonical" values (0.55 M (:) for Oosterhoff I clusters and 0.65 M 0 for Oosterhoff II clusters), unless the Population II metal opacities turn out to be very high. Subject headings: stars: interiors stars: pulsation sta...
متن کاملThe Parallax and Proper Motion of Rx J1856.5−3754 Revisited
RX J1856.5−3754, a bright soft X-ray source believed to be the nearest thermally emitting neutron star, has commanded and continues to command intense interest from X-ray missions. One of the main goals is to determine the radius of this neutron star. An integral part of the determination is an accurate parallax. Walter (2001) analyzed Hubble Space Telescope (HST ) data and derived a parallax, ...
متن کاملPrimitive Parallax and Parallax Primitives
This paper describes an implementation of parallax depth perception designed to be a contributing unit to a distributed perceptual intelligence. The work was done in the context of the Cog project, a large-scale eeort to develop human or at least infant intelligence from the bottom up. Our implementation uses fast-approximation \good enough" region mapping and relevant motion detection over mul...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2016
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201527859