6.7GHz methanol maser flare in G11.497-1.485 Virtual Observatory Resource

Authors
  1. Bayandina O.S.
  2. Burns R.A.
  3. Caratti o Caratti A.
  4. Kurtz S.E.
  5. Moscadelli L.,Shakhvorostova N.N.
  6. Sobolev A.M.
  7. Tanabe Y.
  8. Val'tts I.E.
  9. Yonekura Y.
  10. Published by
    CDS
Abstract

Maser flares are of particular significance for the study of massive star formation as they not only signal but also provide unique insights into transient phenomena such as accretion bursts. With this project, we aim to investigate the context of the ongoing 6.7 GHz methanol maser flare in the little-known massive star forming region G11.497-1.485. Two epoch of the Karl G. Jansky Very Large Array (VLA) observations have been performed for 6.7GHz and 12GHz class II methanol, and 22GHz water masers, as well as continuum at C, Ku, and K-bands. The VLA overview revealed the presence of five distinct radio-continuum sources (CM1-4 and N) in G11.497-1.485. The central source CM1 is found to show signs of accretion disk fragmentation, highlighted by the cm-continuum traced fragments, as well as to drive a high-energy jet, the ends of which are marked by non-thermal knots CM2 and CM3. CM1 showed a gradual flaring of methanol masers and fading of a 22GHz water maser, which might be signalling an accretion burst. The two remaining sources of the region, CM4 and N, revealed one of the most compact jet and disk-jet systems found to date. The obtained data revealed, for the first time, the structure of the G11.497-1.485 region. The change in fluxes of the maser and continuum emission confirmed a transient event and revealed its impact on multiple sources in the region.

Keywords
  1. star-forming-regions
  2. astrophysical-masers
  3. radio-astronomy
  4. radio-sources
Bibliographic source Bibcode
2024A&A...684A..86B
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ivo://CDS.VizieR/J/A+A/684/A86
Document Object Identifer DOI
doi:10.26093/cds/vizier.36840086

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History

2024-04-05T09:14:00Z
Resource record created
2024-04-05T09:14:00Z
Created
2024-09-11T20:03:10Z
Updated

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