The presence of dark matter is inferred from its gravitational effects on visible matter and the structure of the universe. Scientists believe that dark matter makes up a significant portion of the total matter in the universe, accounting for its observed gravitational behavior.
However, dark matter is thought to be in the form of diffuse clouds or clumps spread throughout galaxies and galaxy clusters, rather than concentrated in individual stars. It does not emit or reflect light, so it cannot form luminous objects like stars.
It's worth noting that scientific understanding evolves over time, and new discoveries may occurdate. If any new information about the existence of a dark matter star has emerged, it would be best to refer to the latest research and scientific publications for the most up-to-date and accurate information on this topic.