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Abstract <p>Based on the spatial distribution of objects in the solar vicinity with a radius of 20 pc and after correcting for incomplete observational data, an expression for estimating the probability of finding an object at a certain distance from the Sun has been derived. According to these estimates, there is a probability of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\( \sim {\kern 1pt} 0.5\)</EquationSource> <!--AstEng2670018Bakirova-m1--> </InlineEquation> that a brown dwarf exists in the immediate solar vicinity (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\( &lt; {\kern 1pt} 1.2\)</EquationSource> <!--AstEng2670018Bakirova-m2--> </InlineEquation> pc). The possible multiplicity of this hypothetical object, as well as the reasons why it has not yet been detected, has been discussed. The paper is partially based on a report presented at the conference Modern Stellar Astronomy—2025.</p>

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Probability of the Presence of Undetected Brown Dwarfs in the Solar Vicinity

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • D. R. Bakirova,
  • O. Yu. Malkov

摘要

Abstract

Based on the spatial distribution of objects in the solar vicinity with a radius of 20 pc and after correcting for incomplete observational data, an expression for estimating the probability of finding an object at a certain distance from the Sun has been derived. According to these estimates, there is a probability of \( \sim {\kern 1pt} 0.5\) that a brown dwarf exists in the immediate solar vicinity ( \( < {\kern 1pt} 1.2\) pc). The possible multiplicity of this hypothetical object, as well as the reasons why it has not yet been detected, has been discussed. The paper is partially based on a report presented at the conference Modern Stellar Astronomy—2025.