* Astronomy

Title: DEFPOS H\alpha Observations of W80 Complex
Authors: Naz\im Aksaker

We present H{\alpha} emission line measurements of the W80 nebular complex. A total of 26 regions have been observed inside the nebula with the Dual Etalon Fabry-Perot Optical Spectrometer (DEFPOS) system at the f/48 Coude focus of 150 cm RTT150 telescope located at TUBITAK National Observatory (TUG) in Antalya/Turkey. The intensities, the local standard of rest (LSR) velocities (V_{LSR}), heliocentric radial velocities (V_{HEL}) and the linewidths at Full Width at Half Maximum (FWHM) of the H{\alpha} emission lines have been determined from these observations. They lie in the range of 259 to 1159 Rayleigh {1R = 10^{6}/4\pi photons cm^{-2} sr^{-1} s^{-1} = 2.4110^{-7} erg cm^{-2} sr^{-1} s^{-1} at H{\alpha}.} (R), 4 to 12 km s^{-1} and 44 to 55 km s^{-1}, respectively. The radial velocity measurements show that there are several maxima and minima inside the W80. The new results confirm the literature that complex seems to be rather a uniform in radial velocity and no seen turbulent motion inside the complex. The average value of the calculated the Emission Measure (EM) for the regions is 3.1 pc cm^{-6}.

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