# Faint, high proper motion star candidates selected from the SDSS and PS1 catalogs

## TL;DR

This study identifies faint high proper motion stars by comparing SDSS and PS1 data, discovering over 2900 candidates, many of which are not listed in Gaia-DR2, thus expanding the known population of such stars.

## Contribution

It introduces a method to find faint high proper motion stars using SDSS and PS1 data, increasing the catalog of known objects beyond Gaia-DR2.

## Key findings

- Identified 2923 high proper motion stars, including 1389 new candidates.
- Proper motions are consistent with Gaia measurements with ~10 mas/yr accuracy.
- Demonstrates the effectiveness of combining SDSS and PS1 data for faint star detection.

## Abstract

High proper motion stars probe several extreme stellar populations, including nearby objects, Galactic halo stars, and hyper-velocity stars. Extending the search for high proper motion stars, to faint limits can increase their numbers and help to identify interesting targets. We conduct a search for faint (r>19.5 mag) high proper motion stars (>~200 mas/yr) by comparing the Sloan Digital Sky Survey (SDSS) - Data Release (DR) 10 catalog to the Pan-STARRS1-DR1 stacked image catalog. Our main selection criterion is stars that moved >1.5 arcsec and up to 7 arcsec between the SDSS and PS1 epochs. We identify 2923 high proper motion stars, of which 826 do not have proper motion in the GAIA-DR2 catalog and 565 are not listed in the GAIA-DR2 catalog. Our SDSS-PS1 proper motions are consistent with the GAIA-measured proper motions with a robust rms of about 10 mas/yr.