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Emission Line Profiles in the Planetary Nebulae IC 4593 and NGC 6153

Published online by Cambridge University Press:  19 July 2016

D.P.K. Banerjee
Affiliation:
Physical Research Laboratory, Ahmedabad-380 009, India
B. G. Anandarao
Affiliation:
Physical Research Laboratory, Ahmedabad-380 009, India

Abstract

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The Planetary Nebulae IC 4593 and NGC 6153 are two rather compact objects not well studied. The nebula IC 4593 is about 12 arcsec in diameter and has a central star of Type 07 f; while the southern nebula NGC 6153 is about 22 arcsec in diameter and its central star is faint and of unknown spectral type. Using a high-resolution scanning Fabry-Pérot spectrometer we have made profile measurements of emission lines Hα λ6563 A, [O III] λ5007 A, and [N II] λ6584 A in the central regions of these two nebulae. We have found expansion velocities for IC 4593 of 40 km s−1 in [N II] and 16 km s−1 in [O III]. In the case of NGC 6153, we have obtained expansion velocities of 15 km s−1 in [N II] and 13 km s−1 in [O III] line. The profiles in Hα in both the nebulae dis not show a double peaked feature due to the larger thermal broadening. In the case of IC 4593, both [O III] and [N II] profiles showed complex structures. These results and their interpretation will be discussed.

Type
II. Nebular Properties
Copyright
Copyright © Kluwer 1989