Articles written in Journal of Astrophysics and Astronomy
Volume 38 Issue 4 December 2017 Article ID 0067 Research Article
In this study, eighty six Hα (6563 Å) emission line spectra from the central region (∼40′×40′) of the Orion Nebula (NGC1976, M42, Sh2-281) have been obtained using DEFPOS spectrometer with a circular field of view of 4′ at TUBITAK National Observatory (TUG, Antalya, Turkey). Measurements provide information about the intensities, line widths, and radial velocities of the gas surrounding the Sh2-281 HII-region. The intensities, the radial velocities and the line widths of the Hα emission line were found in the range of from 319.85 R to 6009.08 R (mean 2006 ± 400 R), from −14.91 km s−1 to +5.40 km s−1 (mean −4.51 ± 3.80 km s−1), and from 27.83 km s−1 to 49.60 km s−1 (mean 41.09 ± 7.74 km s−1), respectively. Moreover, the mean emission measure (EM) calculated from
Volume 40 | Issue 5
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