Poster Open Access

Probing the magnetospheric accretion region of the young system DoAr 44 using VLTI/GRAVITY

Bouvier Jerome; Perraut Karine; Alecian Evelyne


JSON Export

{
  "files": [
    {
      "links": {
        "self": "https://zenodo.org/api/files/82cdec99-5617-4716-8529-2815ba0fff9f/CS205_poster_02mar21.pdf"
      }, 
      "checksum": "md5:6f1fe74bb2998a4411887a6335fe4690", 
      "bucket": "82cdec99-5617-4716-8529-2815ba0fff9f", 
      "key": "CS205_poster_02mar21.pdf", 
      "type": "pdf", 
      "size": 10097437
    }, 
    {
      "links": {
        "self": "https://zenodo.org/api/files/82cdec99-5617-4716-8529-2815ba0fff9f/Screen%20Shot%202021-02-26%20at%2009.11.57.png"
      }, 
      "checksum": "md5:aaa738072c2b573ebea660446c0ea51e", 
      "bucket": "82cdec99-5617-4716-8529-2815ba0fff9f", 
      "key": "Screen Shot 2021-02-26 at 09.11.57.png", 
      "type": "png", 
      "size": 1167966
    }
  ], 
  "owners": [
    199719
  ], 
  "doi": "10.5281/zenodo.4563911", 
  "stats": {
    "version_unique_downloads": 62.0, 
    "unique_views": 47.0, 
    "views": 48.0, 
    "version_views": 48.0, 
    "unique_downloads": 62.0, 
    "version_unique_views": 47.0, 
    "volume": 647403934.0, 
    "version_downloads": 65.0, 
    "downloads": 65.0, 
    "version_volume": 647403934.0
  }, 
  "links": {
    "thumb250": "https://zenodo.org/api/iiif/v2/82cdec99-5617-4716-8529-2815ba0fff9f:3ff63427-a2f4-4fb0-a4e5-df74560cfe08:Screen%20Shot%202021-02-26%20at%2009.11.57.png/full/250,/0/default.png", 
    "doi": "https://doi.org/10.5281/zenodo.4563911", 
    "thumbs": {
      "10": "https://zenodo.org/record/4563911/thumb10", 
      "750": "https://zenodo.org/record/4563911/thumb750", 
      "50": "https://zenodo.org/record/4563911/thumb50", 
      "1200": "https://zenodo.org/record/4563911/thumb1200", 
      "100": "https://zenodo.org/record/4563911/thumb100", 
      "250": "https://zenodo.org/record/4563911/thumb250"
    }, 
    "conceptdoi": "https://doi.org/10.5281/zenodo.4563910", 
    "conceptbadge": "https://zenodo.org/badge/doi/10.5281/zenodo.4563910.svg", 
    "latest_html": "https://zenodo.org/record/4563911", 
    "bucket": "https://zenodo.org/api/files/82cdec99-5617-4716-8529-2815ba0fff9f", 
    "badge": "https://zenodo.org/badge/doi/10.5281/zenodo.4563911.svg", 
    "html": "https://zenodo.org/record/4563911", 
    "latest": "https://zenodo.org/api/records/4563911"
  }, 
  "conceptdoi": "10.5281/zenodo.4563910", 
  "created": "2021-02-26T08:19:42.438865+00:00", 
  "updated": "2021-02-26T13:44:51.748178+00:00", 
  "conceptrecid": "4563910", 
  "revision": 3, 
  "id": 4563911, 
  "metadata": {
    "access_right_category": "success", 
    "doi": "10.5281/zenodo.4563911", 
    "description": "<p>Young stars accrete material from their circumstellar disk through magnetically-controlled funnel flows. This so-called magnetospheric accretion process is central to the properties of young systems and not yet fully deciphered. We report here on an attempt to directly probe the star-disk interaction region a scale of less than 0.1 au in the young system DoAr 44, using with VLTI/GRAVITY in the K-band. We computed interferometric visibilities and phases in the continuum and in the Br$\\gamma$ line in order to constrain the extent and geometry of the emitting regions. We resolve the continuum emission of the inner dusty disk and measure a half-flux radius of 0.14 au. We show that Br$\\gamma$ emission arises from an even more compact region than the inner disk, with an upper limit of 0.047 au (&sim;5 R$_\\star$). Differential phase measurements between the Br$\\gamma$ line and the continuum allow us to measure the astrometric displacement of the Br$\\gamma$ line-emitting region relative to the continuum on a scale of a few tens of microarcsec, corresponding to a fraction of the stellar radius. Our results can be accounted for by a simple geometric model where the Br$\\gamma$ line emission arises from a compact region interior to the inner disk edge, on a scale of a few stellar radii, fully consistent with the concept of magnetospheric accretion process in low-mass young stellar systems.</p>", 
    "contributors": [
      {
        "type": "Editor", 
        "name": "Wolk, Scott"
      }
    ], 
    "title": "Probing the magnetospheric accretion region of the young system DoAr 44 using VLTI/GRAVITY", 
    "license": {
      "id": "CC-BY-4.0"
    }, 
    "relations": {
      "version": [
        {
          "count": 1, 
          "index": 0, 
          "parent": {
            "pid_type": "recid", 
            "pid_value": "4563910"
          }, 
          "is_last": true, 
          "last_child": {
            "pid_type": "recid", 
            "pid_value": "4563911"
          }
        }
      ]
    }, 
    "communities": [
      {
        "id": "coolstars20half"
      }
    ], 
    "grants": [
      {
        "code": "742095", 
        "links": {
          "self": "https://zenodo.org/api/grants/10.13039/501100000780::742095"
        }, 
        "title": "Star-Planet-Inner Disk Interactions (SPIDI): unveiling the formation and evolution of inner planetary systems", 
        "acronym": "SPIDI", 
        "program": "H2020", 
        "funder": {
          "doi": "10.13039/501100000780", 
          "acronyms": [], 
          "name": "European Commission", 
          "links": {
            "self": "https://zenodo.org/api/funders/10.13039/501100000780"
          }
        }
      }
    ], 
    "keywords": [
      "Young stars"
    ], 
    "publication_date": "2021-02-26", 
    "creators": [
      {
        "affiliation": "IPAG", 
        "name": "Bouvier Jerome"
      }, 
      {
        "affiliation": "IPAG", 
        "name": "Perraut Karine"
      }, 
      {
        "affiliation": "IPAG", 
        "name": "Alecian Evelyne"
      }
    ], 
    "meeting": {
      "acronym": "CS20.5", 
      "url": "http://coolstars20.cfa.harvard.edu/cs20half/", 
      "dates": "March 2-4, 2021", 
      "place": "virtually anywhere", 
      "title": "The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun"
    }, 
    "access_right": "open", 
    "resource_type": {
      "type": "poster", 
      "title": "Poster"
    }, 
    "related_identifiers": [
      {
        "scheme": "doi", 
        "identifier": "10.5281/zenodo.4563910", 
        "relation": "isVersionOf"
      }
    ]
  }
}
48
65
views
downloads
All versions This version
Views 4848
Downloads 6565
Data volume 647.4 MB647.4 MB
Unique views 4747
Unique downloads 6262

Share

Cite as