On the Possibility of Binary Companion of the Sun

Abstract

In this article, we present some new arguments on the theoretical dwarf star thought to be a companion to our Sun, known as the Nemesis, which is postulated to explain a perceived cycle of mass extinctions in Earth's history. Some speculated that such a star could affect the orbit of objects in the far outer solar system, sending them on a collision course with Earth. While recent astronomical surveys failed to find any evidence that such a star exists, we outline in this article some theoretical findings including our own serendipity finding, suggesting that such a dwarf star companion of the Sun remains a plausibility. We also discuss possible theoretical framework to advance further this line of thought.