{
  "id": "1506.06950",
  "version": "v1",
  "published": "2015-06-23T11:27:48.000Z",
  "updated": "2015-06-23T11:27:48.000Z",
  "title": "A Search for Substellar Companions to the Two Nearest Brown Dwarf Systems",
  "authors": [
    "N. D. Melso",
    "K. M. Kaldon",
    "K. L. Luhman"
  ],
  "comment": "Astronomical Journal, in press",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "WISE J104915.57-531906.1 A+B and WISE J085510.83-071442.5 were recently discovered as the third and fourth closest known systems to the Sun, respectively (2.0 and 2.3 pc). The former consists of a L8+T0.5 binary and the latter is a probable Y dwarf and is the coldest known brown dwarf (~250 K). We present a search for common proper motion companions to these brown dwarfs using multi-epoch mid-infrared images from the Spitzer Space Telescope. We have also obtained near-infrared adaptive optics images of WISE J104915.57-531906.1 A+B with the Very Large Telescope to search for companions at smaller separations than reached by Spitzer. No new companions are detected in either system. At projected separations of 25-420\" (50-840 AU) for WISE J104915.57-531906.1 A+B and 4-420\" (9-970 AU) for WISE J085510.83-071442.5, the Spitzer images are sensitive to companions with M_4.5<21.6 and 21.9, respectively, which correspond to masses of >=1 M_Jup for ages of >=1 Gyr and temperatures of >=150 K. The detection limit in the adaptive optics images of WISE J104915.57-531906.1 A+B is dH~10 at 3-15\" (6-30 AU), or >=7 M_Jup for >=1 Gyr.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-06-23T11:27:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nearest brown dwarf systems",
      "substellar companions",
      "wise j104915",
      "adaptive optics images",
      "common proper motion companions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}