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The Extended Emission of Ultracompact HII Regions: An Overview and New Observations

  • Eduardo de la Fuente
  • Stanley E. Kurtz
  • M.S.N. Kumar
  • José Franco
  • Alicia Porras
  • Simon N. Kemp
  • Alfredo Franco–Balderas
Conference paper
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

Summary

Ultracompact (UC) HII regions with Extended Emission (EE) are classical UC HII regions associated with much larger (>1’) structures of ionized gas. The efforts to investigate, detect, and understand if the EE is physically related with the UC emission are few. If they are related, our understanding of UC HII regions may be affected (e.g., in the estimation of ionizing UV photons). Here we present a brief overview of UC HII regions with EE (UC HII+EE) including our most recent effort aimed at searching for UC HII regions associated with extended emission.

Keywords

Spectral Type Methanol Maser Extended Emission Exciting Star Methanol Maser Emission 
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. Casoli, F., et al. 1986, A&A, 169, 281ADSGoogle Scholar
  2. Churchwell, E. 2002, ARA&A, 40, 27CrossRefADSGoogle Scholar
  3. de la Fuente Acosta, E. 2007, Un Estudio Observacional en Radio e Infrarrojo sobre Regiones HII Ultracompactas con Emisión Extendida, Ph. D. Thesis, Universidad de Guadalajara, MéxicoGoogle Scholar
  4. Ellingsen, S. P., Shabala, S. S., & Kurtz, S. 2005, MNRAS, 357, 1003CrossRefADSGoogle Scholar
  5. Fazio, G. G., et al. 2004, ApJS, 154, 10CrossRefADSGoogle Scholar
  6. Heitsch, F., et al. 2007, ApJ, 656, 227CrossRefADSGoogle Scholar
  7. Kim, K. T., & Koo, B. C. 2001, ApJ, 549, 979CrossRefADSGoogle Scholar
  8. Koo, B. C., et al. 1996, ApJ, 456, 662CrossRefADSGoogle Scholar
  9. Kumar, M. S. M., & Grave, J. 2007, A&A, in pressGoogle Scholar
  10. Kurtz, S. 2002, in Hot Star Workshop III, Ultracompact HII regions, vol. 267, ed. P. Crowther (ASP), 81Google Scholar
  11. Kurtz, S., Churchwell, E., & Wood, D. O. S. 1994, ApJS, 91, 659CrossRefADSGoogle Scholar
  12. Kurtz, S., et al. 1999, ApJ, 514, 232CrossRefADSGoogle Scholar
  13. Panagia, N. 1973, AJ, 78, 929CrossRefADSGoogle Scholar
  14. Rodriguez, L. F. 2005, in IAU Symposium 227, Ultracompact HII Regions, vol 1, ed. R. Cesaroni, E. Churchwell, M. Felli & C.M. Walmsley (Berlin Heidelberg New York:Springer), 120Google Scholar
  15. Wood, D.O.S., & Churchwell, E. 1989, ApJS, 69, 831CrossRefADSGoogle Scholar

Copyright information

© Springer-Verlag New York 2009

Authors and Affiliations

  • Eduardo de la Fuente
    • 1
    • 2
    • 3
  • Stanley E. Kurtz
    • 2
  • M.S.N. Kumar
    • 4
  • José Franco
    • 5
  • Alicia Porras
    • 1
  • Simon N. Kemp
    • 3
  • Alfredo Franco–Balderas
    • 5
  1. 1.Instituto Nacional de Astrofí sica Óptica y ElectrónicaPueblaMéxico
  2. 2.Centro de Radioastronomí a y Astrofí sica UNAMMoreliaMéxico
  3. 3.Instituto de Astronomí a y Meteorologí a Dpto. de Fí sica CUCEIUniversidad de GuadalajaraMéxico
  4. 4.Centro de Astrofisica da Universidade do PortoPortugal
  5. 5.Instituto de Astronomí a UNAMMéxico

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