On the weak and strong field effects in antiscalar background
Mychelkin E. Makukov M. Suliyeva G. Jafari N.
April 2024Springer
General Relativity and Gravitation
2024#56Issue 4
The triumph of general relativity under the banner “gravity is geometry” began with confirming the crucial effects within the Solar system and proceeded recently to the strong-field shadow effect for the compact object in the center of the Milky Way. Here, we examine some of those phenomena for the Einstein-scalar equations in the antiscalar regime to reveal the difference from vacuum both in weak and strong fields. As a result, we find that for week-field perihelion shift the difference between vacuum and antiscalar cases proves to be observationally imperceptible in practice, even for S-cluster stars with high eccentricities, except for the S62 star with measurable difference per century. In strong-field case, we reconsider the shadow effect (this time without involving complex-valued scalar field) as the most perspective from an observational viewpoint. Even though the resulting difference is quite appreciable (about 5%), no conclusion can be made until the mass of the central object is known with the accuracy an order of magnitude higher than the currently available.
Antiscalar background , Precession of perihelia , Scalar field , Shadow effect
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Fesenkov Astrophysical Institute, Observatory 23, Almaty, 050020, Kazakhstan
Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
Fesenkov Astrophysical Institute
Al-Farabi Kazakh National University
10 лет помогаем публиковать статьи Международный издатель
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