Observations of Stellar Objects at a Shell Boundary in the Star-Forming Complex in the Galaxy IC1613

Abstract

The single region of ongoing star formation in the galaxy IC 1613 has been observed in order to reveal the nature of compact emission-line objects at the edges of two shells in the complex, identified earlier in H-alpha line images. The continuum images show these compact objects to be stars. Detailed spectroscopic observations of these stars and the surrounding nebulae were carried out with an integral field spectrograph MPFS mounted on the 6m telescope of the Special Astrophysical Observatory. The resulting stellar spectra were used to determine the spectral types and luminosity classes of the objects. An Of star we identified is the only object of this spectral type in IC 1613. The results of optical observations of the multi-shell complex are compared to 21cm radio observations. The shells harboring the stars at their boundaries constitute the most active part of the star-forming region. There is evidence that shocks have played an important role in the formation of the shells.

10 pages, 5 PS and 1 color JPEG figure

References in corpus (2)

• Deep HST Imaging of IC 1613. I. Variable Stars and Distance
• Interstellar Medium Surrounding the WO Star in the Galaxy IC 1613: New Optical and Radio Observations

Cited by in corpus (6)

• The SCORPIO focal reducer
• VLT spectroscopy of blue supergiants in IC 1613
• The Young Stellar Population of IC1613. I. A New Catalogue of OB Associations
• Detailed Kinematic Study of the Ionized and Neutral Gas in the Complex of Star Formation in the Galaxy IC 1613
• The catalogue of OB associations in IC 1613
• Low-metallicity (sub-SMC) massive stars