Binaries and Multiple Stellar Systems

Horch, Elliott

doi:10.1007/978-94-007-5615-1_13

Cited by 1 publication

(1 citation statement)

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“…It is possible to monitor the orbital motions and measure the parallaxes, masses, orbital periods, and other physical quantities of these systems. The significance of studying binary or multiple stars includes testing theories of stellar structure and evolution; exploring star formation mechanisms and environmental effects in the galactic gravitational potential and in clusters; understanding important types of astrophysical phenomena such as Type Ia supernovae, CVs, and stellar X-ray sources (Horch 2013); testing fundamental physical theories such as the relativistic effects of binary/multiple stellar systems containing neutron stars and/or black holes (e.g., Deller et al 2018;Ding et al 2021;Guo et al 2021); etc.…”

Section: Binary or Multiple Stellar Systemsmentioning

confidence: 99%

VLBI with SKA: Possible Arrays and Astrometric Science

Li,

Xu,

et al. 2024

Res. Astron. Astrophys.

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The next generation of very long baseline interferometry (VLBI) is stepping into the era of microarcsecond ($\mu$as) astronomy, and pushing astronomy, especially astrometry, to new heights. VLBI with the Square Kilometre Array (SKA), SKA-VLBI, will increase current sensitivity by an order of magnitude, and reach astrometric precision routinely below 10 $\mu$as, even challenging 1 $\mu$as. This advancement allows precise parallax and proper motion measurements of various celestial objects. Such improvements can be used to study objects (including isolated objects, and binary or multiple systems) in different stellar stages (such as star formation, main-sequence stars, asymptotic giant branch stars, pulsars, black holes, white dwarfs, etc.), unveil the structure and evolution of complex systems (such as the Milky Way), benchmark the international celestial reference frame, and reveal cosmic expansion. Furthermore, the theory of general relativity can also be tested with SKA-VLBI using precise measurements of light deflection under the gravitational fields of different solar system objects and the perihelion precession of solar system objects.

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