{
  "id": "2304.07770",
  "version": "v1",
  "published": "2023-04-16T13:09:53.000Z",
  "updated": "2023-04-16T13:09:53.000Z",
  "title": "Multiple Stellar Populations in Globular Clusters with JWST",
  "authors": [
    "A. P. Milone"
  ],
  "comment": "Four pages and two figures. Proceedings of the IAUS 377: Early Disk-Galaxy Formation from JWST to the Milky Way. Kuala-Lumpur,February 6-10, 2023",
  "categories": [
    "astro-ph.SR",
    "astro-ph.GA"
  ],
  "abstract": "I present the first evidence of multiple populations in the globular cluster (GCs) 47Tucanae based on images collected with the near-infrared camera (NIRCam) on board the James Webb Space Telescope (JWST). While NIRCam photometry is poorly sensitive to multiple populations among stars brighter than the main-sequence (MS) knee, the M-dwarfs more-massive than 0.1 solar masses define a wide F115W-F322W2 color range due to multiple populations. The star-to-star color differences are mostly due to the different amounts of water vapor (hence oxygen) that affect the spectra of M-dwarfs. The chromosome map unveils an extended first population (1P) composed of M-dwarfs with different metallicities and three main groups of second-population (2P) stars that are depleted in oxygen with respect to the 1P. I present the discovery of an MS of very-low-mass stars (masses smaller than 0.1 solar masses) and tentatively associated it with a sequence composed of O-rich stars alone.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-04-16T13:09:53.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "multiple stellar populations",
      "globular cluster",
      "multiple populations",
      "wide f115w-f322w2 color range",
      "james webb space telescope"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}