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Measurements of radial velocities and velocity dispersion of stars in circumnuclear regions of galaxies using the 2D spectroscopy techniqueстатья
- Автор: Moiseev A.V.
- Журнал: Bulletin of the Special Astrophysical Observatory
- Том: 51
- Год издания: 2001
- Первая страница: 11
- Последняя страница: 20
- Аннотация: A procedure is described of construction of velocity fields and velocity dispersion of the stellar component in the central regions of galaxies on the basis of data obtained with the integral field spectrograph MPFS. Cross-correlation and Fourier quotients techniques adapted for 2D spectra reduction are used. A detailed discussion is given of the problems of providing for the instrumental profile in measuring the velocity dispersion. Using the existing version of the spectrograph, one can measure radial velocities to an accuracy of 5 - 10 km/s and 10 - 15 km/s, respectively. As an example the ”double-barred” galaxy NGC 2950 is considered.
- Добавил в систему: Моисеев Алексей Валерьевич