{
  "id": "2401.15438",
  "version": "v1",
  "published": "2024-01-27T15:12:50.000Z",
  "updated": "2024-01-27T15:12:50.000Z",
  "title": "Relations of rotation and chromospheric activity to stellar age for FGK dwarfs from Kepler and LAMOST",
  "authors": [
    "Lifei Ye",
    "Shaolan Bi",
    "Jinghua Zhang",
    "Tiancheng Sun",
    "Liu Long",
    "Zhishuai Ge",
    "Tanda Li",
    "Xianfei Zhang",
    "Xunzhou Chen",
    "Yaguang Li",
    "Jianzhao Zhou",
    "Maosheng Xiang"
  ],
  "categories": [
    "astro-ph.SR",
    "astro-ph.EP",
    "astro-ph.GA"
  ],
  "abstract": "The empirical relations between rotation period, chromospheric activity, and age can be used to estimate stellar age. To calibrate these relations, we present a catalog, including the masses and ages of 52,321 FGK dwarfs, 47,489 chromospheric activity index $logR^{+}_{HK}$, 6,077 rotation period $P_{rot}$ and variability amplitude $S_{ph}$, based on data from LAMOST DR7, Kepler and Gaia DR3. We find a pronounced correlation among $P_{rot}$, age, and [Fe/H] throughout the main-sequence phase for F dwarfs. However, the decrease of $logR^{+}_{HK}$ over time is not significant except for those with [Fe/H] $<$ $-$0.1. For G dwarfs, both $P_{rot}$ and $logR^{+}_{HK}$ are reliable age probes in the ranges $\\sim$ 2-11 Gyr and $\\sim$ 2-13 Gyr, respectively. K dwarfs exhibit a prominent decrease in $logR^{+}_{HK}$ within the age range of $\\sim$ 3-13 Gyr when the relation of $P_{rot}-\\tau$ is invalid. These relations are very important for promptly estimating the age of a vast number of stars, thus serving as a powerful tool in advancing the fields of exoplanet properties, stellar evolution, and Galactic-archaeology.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-01-27T15:12:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fgk dwarfs",
      "rotation period",
      "estimate stellar age",
      "chromospheric activity index",
      "lamost dr7"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}