{
  "id": "1510.01702",
  "version": "v1",
  "published": "2015-10-06T19:14:49.000Z",
  "updated": "2015-10-06T19:14:49.000Z",
  "title": "The Impact of Starspots on Mass and Age Estimates During The Pre-Main Sequence",
  "authors": [
    "Garrett Somers",
    "Marc H. Pinsonneault"
  ],
  "comment": "To appear in \"Young Stars and Planets Near the Sun\", Proceedings of IAU Symposium No. 314 (Cambridge University Press), J.H. Kastner, B. Stelzer, S.A. Metchev, eds",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We investigate the impact of starspots on the evolution of late-type stars during the pre-main sequence (pre-MS). We find that heavy spot coverage increases the radii of stars by 4-10%, consistent with inflation factors in eclipsing binary systems, and suppresses the rate of pre-MS lithium depletion, leading to a dispersion in zero-age MS Li abundance (comparable to observed spreads) if a range of spot properties exist within clusters from 3-10 Myr. This concordance with data implies that spots induce a range of radii at fixed mass during the pre-MS. These spots decrease the luminosity and $T_{\\rm eff}$ of stars, leading to a displacement on the HR diagram. This displacement causes isochrone derived masses and ages to be systematically under-estimated, and can lead to the spurious appearance of an age spread in a co-eval population.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-10-06T19:14:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pre-main sequence",
      "age estimates",
      "heavy spot coverage increases",
      "zero-age ms li abundance",
      "pre-ms lithium depletion"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}