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  • Ginsburg, A.European Southern Observatory (ESO) (author)

Dense gas in the Galactic central molecular zone is warm and heated by turbulence

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • 2016-01-26
  • EDP Sciences,2016
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e0bb6202-5f7e-481c-9bc4-7172a98baf5b
  • https://doi.org/10.1051/0004-6361/201526100DOI
  • https://research.chalmers.se/publication/233301URI

Supplementary language notes

  • Language:English
  • Summary in:English

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

Notes

  • Context. The Galactic center is the closest region where we can study star formation under extreme physical conditions like those in high-redshift galaxies. Aims. We measure the temperature of the dense gas in the central molecular zone (CMZ) and examine what drives it. Methods. We mapped the inner 300 pc of the CMZ in the temperature-sensitive J = 3-2 para-formaldehyde (p-H2CO) transitions. We used the 3(2,1)-2(2,0)/3(0,3)-2(0,2) line ratio to determine the gas temperature in n similar to 10(4) - 10(5) cm(-3) gas. We have produced temperature maps and cubes with 30 0 0 and 1 km s(-1) resolution and published all data in FITS form. Results. Dense gas temperatures in the Galactic center range from similar to 60 K to > 100 K in selected regions. The highest gas temperatures T-G > 100 K are observed around the Sgr B2 cores, in the extended Sgr B2 cloud, the 20 km s(-1) and 50 km s(-1) clouds, and in "The Brick" (G0.253 + 0.016). We infer an upper limit on the cosmic ray ionization rate zeta(CR)

Subject headings and genre

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

  • Henkel, C.King Abdulaziz University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Ao, Y.Chinese Academy of Sciences,National Astronomical Observatory of Japan (author)
  • Riquelme, D.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Mann, J. K. F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Pillai, T.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Mills, E. A. C.National Radio Astronomy Observatory (author)
  • Requena-Torres, M. A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Immer, K.European Southern Observatory (ESO) (author)
  • Testi, L.European Southern Observatory (ESO) (author)
  • Ott, J.National Radio Astronomy Observatory (author)
  • Bally, J.University of Colorado at Boulder (author)
  • Battersby, C.Harvard-Smithsonian Center for Astrophysics (author)
  • Darling, J.University of Colorado at Boulder (author)
  • Aalto, Susanne,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)saalto (author)
  • Stanke, T.European Southern Observatory (ESO) (author)
  • Kendrew, S.University Of Oxford (author)
  • Kruijssen, J. M. D.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Longmore, S.Liverpool John Moores University (author)
  • Dale, J.Ludwig-Maximilians-Universität München,Ludwig Maximilian University of Munich (author)
  • Guesten, R.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Menten, K. M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • European Southern Observatory (ESO)King Abdulaziz University (creator_code:org_t)

Related titles

  • In:Astronomy and Astrophysics: EDP Sciences586, s. Art nr A50-0004-63611432-0746

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