Hostname: page-component-7bb8b95d7b-pwrkn Total loading time: 0 Render date: 2024-09-12T05:52:11.607Z Has data issue: false hasContentIssue false

Raman Scattering and the Hidden He II Emission Region in the Bipolar Planetary Nebula M2-9

Published online by Cambridge University Press:  26 May 2016

Hee-Won Lee*
Affiliation:
Dept. of Geoinformation Sciences, Sejong University, Seoul, Korea

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In the spectrum of the young bipolar planetary nebula M2-9, we detected the He II Raman scattered feature at 6545 Å. However, in the same spectrum the He II emission lines at 6527 Å and 6560 Å are absent, which implies that the He II emission region is hidden from our line of sight and that the H I scattering region is pretty much extended not to be obscured entirely. We perform photoionization computations to estimate the physical size of the He II emission line region ≲ 1015 cm in the presence of hot luminous star with T ≳ 105 K and L ≲ 103L.

Type
Part VI: The Ionized Gas in Planetary Nebulae
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Balick, B. 1989, AJ, 97, 476 CrossRefGoogle Scholar
Doyle, S., Balick, B. Corradi, H. E., 1995, Å, 293, 872 Google Scholar
Ferland, G., 2001, Hazy, a brief introduction to Cloudy 94.00 Google Scholar
Lee, H.-W., 2000, ApJ, 541, L25 CrossRefGoogle Scholar
Lee, H.-W., Kang, Y. W. & Byun, Y. I., 2001, ApJ, 551, L121 CrossRefGoogle Scholar
Schmid, H. M., 1989, Å, 211, L31 Google Scholar