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The Giant HII Region NGC 2363

Published online by Cambridge University Press:  10 November 2010

G. Tenorio-Tagle
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife
Rosa González-Delgado
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Enrique Pérez
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Guillermo Tenorio-Tagle
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
José M. Víchez
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Elena Terlevich
Affiliation:
Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK
Roberto J. Terlevich
Affiliation:
Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK
Eduardo Telles
Affiliation:
Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK
José M. Rodríguez-Espinosa
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Miguel Mas-Hesse
Affiliation:
Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF), Apdo. 50727, 28080 Madrid, Spain
María Luisa García-Vargas
Affiliation:
Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain
Ángeles I. Díaz
Affiliation:
Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain
Jordi Cepa
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
Hector Castañeda
Affiliation:
Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
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Summary

We present narrow-band Hα imaging and long-slit optical and near infrared spectroscopy of the giant HII region NGC 2363. We have found broad emission lines at 4686 Å and at 5810 Å attributed to WC stars at 6 arcsec to the East of the brightest core of the region. We confirm the existence of low-intensity broad components in Hα and [OIII] which extend some 500 pc. We have derived the physical conditions and chemical composition of the gas in 15 different zones in the region, and do not find significant variations in the abundances. The Paschen discontinuity has been found in emission. The Pa electron temperatures obtained are significantly smaller than those obtained from the [OIII] and [SIII] emission lines, indicating the presence of large temperature fluctuations.

Introduction

One of the targets of the GEFE programme is the giant HII region NGC 2363 located in the SW of the irregular galaxy NGC 2366. This is one of the largest extragalactic HII regions with high surface brightness. The object was observed in La Palma in narrow band Hα and long-slit spectrophotometry from [OII] λ3227 to [SIII] λ9532 at two positions, at the brighest core of the region (which we call knot A) and at 6 arcsec to the East (knot B).

Narrow-band images

The object was observed with the 1-m JKT telescope. We used a CCD with a spatial scale of 0.3 arcsec pixel−1.

Type
Chapter
Information
Violent Star Formation
From 30 Doradus to QSOs
, pp. 117 - 122
Publisher: Cambridge University Press
Print publication year: 1994

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  • The Giant HII Region NGC 2363
    • By Rosa González-Delgado, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Enrique Pérez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Guillermo Tenorio-Tagle, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, José M. Víchez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Elena Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Roberto J. Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Eduardo Telles, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, José M. Rodríguez-Espinosa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Miguel Mas-Hesse, Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF), Apdo. 50727, 28080 Madrid, Spain, María Luisa García-Vargas, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Ángeles I. Díaz, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Jordi Cepa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Hector Castañeda, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.022
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  • The Giant HII Region NGC 2363
    • By Rosa González-Delgado, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Enrique Pérez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Guillermo Tenorio-Tagle, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, José M. Víchez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Elena Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Roberto J. Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Eduardo Telles, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, José M. Rodríguez-Espinosa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Miguel Mas-Hesse, Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF), Apdo. 50727, 28080 Madrid, Spain, María Luisa García-Vargas, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Ángeles I. Díaz, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Jordi Cepa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Hector Castañeda, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.022
Available formats
×

Send book to Google Drive

To send content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive.

  • The Giant HII Region NGC 2363
    • By Rosa González-Delgado, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Enrique Pérez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Guillermo Tenorio-Tagle, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, José M. Víchez, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Elena Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Roberto J. Terlevich, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, Eduardo Telles, Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK, José M. Rodríguez-Espinosa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Miguel Mas-Hesse, Laboratorio de Astrofísica Espacial y Física Fundamental (LAEFF), Apdo. 50727, 28080 Madrid, Spain, María Luisa García-Vargas, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Ángeles I. Díaz, Depto. Física Teórica CIX, Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain, Jordi Cepa, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain, Hector Castañeda, Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife, Spain
  • G. Tenorio-Tagle, Instituto de Astrofísica de Canarias, Tenerife
  • Book: Violent Star Formation
  • Online publication: 10 November 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511600159.022
Available formats
×