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Using Gaia EDR3 astrometry for cluster membership and Pan-STARRS (PS1) photometry for binary identification, we build this set of rotation periods from a campaign of monitoring M67 with the Canada\u2013France\u2013Hawaii Telescope\u2019s MegaPrime wide-field imager. We identify 1807 members of M67, of which 294 are candidate single members with significant rotation period detections. Moreover, we fit a polynomial to the period versus color-derived effective temperature sequence observed in our data. We find that the rotation of very cool dwarfs can be explained by simple solid-body spin-down between 2.7 and 4 Gyr. We compare this rotational sequence to the predictions of gyrochronological models and find that the best match is Skumanich-like spin-down, <jats:italic>P<\/jats:italic>\n                  <jats:sub>rot<\/jats:sub> \u221d <jats:italic>t<\/jats:italic>\n                  <jats:sup>0.62<\/jats:sup>, applied to the sequence of Ruprecht 147. This suggests that, for spectral types K7\u2013M0 with near-solar metallicity, once a star resumes spinning down, a simple Skumanich-like relation is sufficient to describe their rotation evolution, at least through the age of M67. Additionally, for stars in the range M1\u2013M3, our data show that spin-down must have resumed prior to the age of M67, in conflict with the predictions of the latest spin-down models.<\/jats:p>","DOI":"10.3847\/1538-4357\/ac90be","type":"journal-article","created":{"date-parts":[[2022,10,19]],"date-time":"2022-10-19T11:10:33Z","timestamp":1666177833000},"page":"118","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":50,"title":["A 4 Gyr M-dwarf Gyrochrone from CFHT\/MegaPrime Monitoring of the Open Cluster M67"],"prefix":"10.3847","volume":"938","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6669-0217","authenticated-orcid":true,"given":"Ryan","family":"Dungee","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4284-8638","authenticated-orcid":true,"given":"Jennifer","family":"van Saders","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5258-6846","authenticated-orcid":true,"given":"Eric","family":"Gaidos","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8462-0703","authenticated-orcid":true,"given":"Mark","family":"Chun","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8854-3776","authenticated-orcid":true,"given":"Rafael A.","family":"Garc\u00eda","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7965-2815","authenticated-orcid":true,"given":"Eugene A.","family":"Magnier","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0129-0316","authenticated-orcid":true,"given":"Savita","family":"Mathur","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7195-6542","authenticated-orcid":true,"given":"\u00c2ngela R. 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