The dark matter always have a warming effect on the exoplanets. Thus, that could be, as per the clarifications given by the astronomers Rebecca Leane at the Massachusetts Institute of Technology and Juri Smirnov at Ohio State University, useful to detect dark matters.
The duo has premeditated that the heating happens due to the dark matter particles. These particles collide with exoplanets, depositing energy as they scatter and annihilate. So, the astronomers claim that this heating could be easily and extensively explored in the coming years. The planets orbiting stars other than the Sun will continue to expand.
The observations of the galaxies and larger astronomical structures clarify that the universe contains a vast amount of dark matter particles. These particles interact through the gravity but not electromagnetically. However, the detection of dark matter particles at shorter length scales has remained elusive. In their research, Lane and Smirnov claim to suggest that the effects of dark matter could be observed on the planetary scale.
They both figured out that the dark matter particles seized by the gravitational fields of an exoplanet will scatter and eventually annihilate within the mass of the exoplanet. Surely, this will heat up the exoplanet, causing it to emit more infrared radiation than would be expected due to heating by its host star.
Observations of the Milky Way’s rotation suggest that the density of dark matter in our galaxy increases towards its center. This means that the dark-matter heating model could be tested by looking for a relationship between planetary temperature and radial position within the galaxy. So, if the predictions made by Lane and Smirnov are correct, then the exoplanets must be warmer and closer to the galactic center.
Although this effect should also be seen in the temperature of stars. There is a key advantage to using exoplanets as dark matter sensors. Notably, they do not produce their own heat. Therefore, any anomalous heating would be far more noticeable.