Figure 2 from Discovery and Analysis of 21 μm Feature Sources in the Magellanic Clouds

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Discovery and Analysis of 21 μm Feature Sources in the Magellanic Clouds

Authors: Kevin Volk, Bruce J. Hrivnak, Mikako Matsuura, Jeronimo Bernard-Salas, Ryszard Szczerba, G. C. Sloan, Kathleen E. Kraemer, Jacco Th. van Loon, F. Kemper, Paul M. Woods, Albert A. Zijlstra, Raghvendra Sahai, Margaret Meixner, Karl D. Gordon, Robert A. Gruendl, Alexander G. G. M. Tielens, Remy Indebetouw, and Massimo Marengo

Volk et al. 2011 The Astrophysical Journal 735 127.

Provider: AAS Journals

Caption: Figure 2.

IRS spectra for the 15 objects with typical carbon-rich PPNe spectra are replotted here from 15 to 25 μm, normalized to 1 at 20 μm and offset to separate the different objects. The dashed line marks the 21 μm feature peak wavelength. The two dotted lines show the approximate starting and ending wavelengths of the feature. As can be seen in this figure, there is some variation in the positions of the spectral minima at shorter and longer wavelengths around the feature, likely due to variations in the continuum shape and in the strength of the adjacent features.

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