منابع مشابه
The Orbit of the Binary Star Delta Scorpii
Although δ Sco is a bright and well-studied star, the details of its multiplicity have remained unclear. Here we present the first diffractionlimited image of this 0. ′′12 binary star, made using optical interferometry, and resolve the confusion that has existed in the literature over its multi-
متن کاملHigh Resolution Radio Images of the Symbiotic Star R Aquarii
We present MERLIN radio observations of the nearby symbiotic star R Aquarii at 5 and 1.7 GHz with respective nominal resolutions of 0:04 and 0.13 arcsec, comparable to the resolution of the optical and ultraviolet images obtained with the HST. Comparison with the HST images shows that the radio emission is associated with features observed at optical and UV wavelengths. In particular, this comp...
متن کاملDissecting the donor star in the eclipsing polar HU Aquarii
Medium-resolution spectroscopic observations with full phase coverage of the eclipsing polar HU Aqr are presented. Na i absorption and Ca ii emission lines are used to trace the secondary star. While the Na i lines seem to have contributions from both hemispheres of the donor star, the Ca ii lines were found to originate from the irradiated part of its surface alone. An irradiation model was ap...
متن کاملNeutron star spin-kick velocity correlation effect on binary neutron star coalescence rates and spin-orbit misalignment of the components
We study the effect of the neutron star spin – kick velocity alignment observed in young radio pulsars on the coalescence rate of binary neutron stars. Two scenarios of the neutron star formation are considered: when the kick is always present and when it is small or absent if a neutron star is formed in a binary system due to electroncapture degenerate core collapse. The effect is shown to be ...
متن کاملBinary Neutron-Star Systems: From the Newtonian Regime to the Last Stable Orbit
We report on the first calculations of fully relativistic binary circular orbits to span a range of separation distances from the innermost stable circular orbit (ISCO), deeply inside the strong field regime, to a distance (∼ 200 km) where the system is accurately described by Newtonian dynamics. We consider a binary system composed of two identical corotating neutron stars, with 1.43 M gravita...
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ژورنال
عنوان ژورنال: Lick Observatory Bulletins
سال: 1918
ISSN: 0075-9317
DOI: 10.5479/ads/bib/1918licob.9.191a