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A massive “core” associated with the UC HIi region G31.41+0.31

  • R. Cesaroni
  • L. Olmi
  • C. M. Walmsley
  • E. Churchwell
  • P. Hofner
Part III: Young Stellar Objects and Their Environment
Part of the Lecture Notes in Physics book series (LNP, volume 465)

Abstract

We have used the IRAM Plateau de Bure Interferometer to observe the ground state and vibrationally excited lines of methyl cyanide towards the UC HIi region G31.41+0.31. We also obtained a map of the continuum emission at a frequency of 110 GHz. We detect a hot molecular core in the emission both of methyl cyanide and of the 110 GHz continuum. We estimate a temperature of 200 K and a mass of 1000 M for this compact massive region. We also detect a velocity gradient or shift across the methyl cyanide core whose origin could be due to rotation.

Keywords

Continuum Emission Maser Spot Molecular Core Channel Velocity Excited Line 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Cesaroni R., Churchwell E., Hofner P., Walmsley C.M., Kurtz S. (1994a): A&A 288, 903ADSGoogle Scholar
  2. Cesaroni R., Olmi L., Walmsley C.M., Churchwell E., Hofner P. (1994b): with the UC HIi region G31.41+0.31. ApJL 435, L137CrossRefADSGoogle Scholar
  3. Churchwell E., Walmsley C.M., Cesaroni R. (1990): A&AS 83, 119ADSGoogle Scholar
  4. Churchwell E. (1991): NATO ASI Series, C.J. Lada & N. Kylafis edts., KluwerGoogle Scholar
  5. Churchwell E., Walmsley C.M., Wood D.O.S. (1992): A&A 253, 541ADSGoogle Scholar
  6. Gaume R.A., Mutel R.L. (1987): ApJS 65, 193CrossRefADSGoogle Scholar
  7. Olmi L., Cesaroni R., Walmsley C.M. (1993): A&A 276, 489ADSGoogle Scholar

Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • R. Cesaroni
    • 1
  • L. Olmi
    • 2
  • C. M. Walmsley
    • 3
  • E. Churchwell
    • 4
  • P. Hofner
    • 4
  1. 1.Osservatorio Astrofisico di ArcetriFirenzeItaly
  2. 2.I Physicalisches Institut der Universität zu KölnKölnGermany
  3. 3.Arecibo ObservatoryCornell UniversityArecibo
  4. 4.Washburn ObservatoryUniversity of Wisconsin-MadisonMadisonUSA

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