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  • Barnes, Ashley T.Universität Bonn,University of Bonn,European Southern Observatory (ESO) (author)

Mother of dragons: A massive, quiescent core in the dragon cloud (IRDC G028.37+00.07)

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:ace2c57b-5440-4caf-befc-98c17553eb35
  • https://doi.org/10.1051/0004-6361/202245668DOI
  • https://research.chalmers.se/publication/536679URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Context. Core accretion models of massive star formation require the existence of massive, starless cores within molecular clouds. Yet, only a small number of candidates for such truly massive, monolithic cores are currently known. Aims. Here we analyse a massive core in the well-studied infrared-dark cloud (IRDC) called the dragon clouda'(also known as G028.37+00.07 or Cloud Ca). This core (C2c1) sits at the end of a chain of a roughly equally spaced actively star-forming cores near the center of the IRDC. Methods. We present new high-angular-resolution 1 mm ALMA dust continuum and molecular line observations of the massive core. Results. The high-angular-resolution observations show that this region fragments into two cores, C2c1a and C2c1b, which retain significant background-subtracted masses of 23 M· and 2 M· (31 M· and 6 M· without background subtraction), respectively. The cores do not appear to fragment further on the scales of our highest-angular-resolution images (0.2 , 0.005 pc ∼ 1000 AU). We find that these cores are very dense (nH2 > 106 cm-3) and have only trans-sonic non-thermal motions ( 3s ∼ 1). Together the mass, density, and internal motions imply a virial parameter of

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Liu, JunhaoEast Asian Observatory (author)
  • Zhang, Q.Harvard-Smithsonian Center for Astrophysics (author)
  • Tan, Jonathan,1973Chalmers tekniska högskola,Chalmers University of Technology,University of Virginia(Swepub:cth)tanj (author)
  • Bigiell, F.Universität Bonn,University of Bonn (author)
  • Caselli, P.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Cosentino, Giuliana,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)giuliana (author)
  • Fontani, FrancescoOsservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory (author)
  • Henshaw, Jonathan D.Liverpool John Moores University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Jimenez-Serra, I.Instituto Nacional de Tecnica Aeroespacial (author)
  • Kalb, D. S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Law, Chi Yan,1990European Southern Observatory (ESO),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ychi (author)
  • Longmore, S.Liverpool John Moores University (author)
  • Parker, R. J.University of Sheffield (author)
  • Pineda, J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Sanchez-Monge, A.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (author)
  • Lim, WanggiCalifornia Institute of Technology (Caltech) (author)
  • Wang, KeBeijing University of Technology (author)
  • Universität BonnEuropean Southern Observatory (ESO) (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics6750004-63611432-0746

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