Image Details

Choose export citation format:

The POKEMON Speckle Survey of Nearby M Dwarfs. II. Observations of 1125 Targets

  • Authors: Catherine A. Clark, Gerard T. van Belle, Elliott P. Horch, Michael B. Lund, David R. Ciardi, Kaspar von Braun, Jennifer G. Winters, Mark E. Everett, Zachary D. Hartman, Joe Llama

Catherine A. Clark et al 2024 The Astronomical Journal 167 .

  • Provider: AAS Journals

Caption: Figure 8.

Scatter plot of Gaia RUWE value (left) and IPDFMP value (right) vs. angular separation for the 41 POKEMON multiples that were not resolved in Gaia DR3, but for which the primary has a Gaia DR3 astrometric solution. The points are color-coded by Gaia G magnitude, and the black line indicates a RUWE value of 2. All of the unresolved multiples are within 1″. While the RUWE does not reveal the presence of an unseen companion in every case, we do find that the majority (78.0% and 82.9%, respectively) of the RUWE and IPDFMP values are greater than 2, and that the median RUWE and IPDFMP values are 9.1 and 51, respectively. These results indicate that the RUWE and IPDFMP value can be useful identifiers of unseen stellar companions. In particular, the RUWE value is useful for close-in multiples, and the IPDFMP value is useful for wider multiples. However, these results also indicate that high-resolution imaging—in addition to long-term astrometric monitoring from Gaia—is critical for both resolving stellar multiples and determining the properties of any unseen companions.

Other Images in This Article
Copyright and Terms & Conditions

Additional terms of reuse