Abstract
Two-dimensional long slit AAT IPCS spectra of IC 418 (in the 3400–4400 A wavelength region) show faint extensions in the [O II] 3726, 3729 A and Hγ emission lines out to at least 60 arcsec south and 50 arcsec north of the central star, compared to the angular radius of only 6 arcsec for the bright nebula.
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© 1989 International Astronomical Union
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Monk, D.J., Barlow, M.J., Clegg, R.E.S. (1989). Detection of an Extended Optical Halo around IC 418. In: Torres-Peimbert, S. (eds) Planetary Nebulae. International Astronomical Union / Union Astronomique Internationale, vol 131. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0865-9_65
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DOI: https://doi.org/10.1007/978-94-009-0865-9_65
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-0003-8
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