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Summary
| Description |
English: Left: residual H2 image of NGC 6445 created by subtracting the scaled Brγ image from the H2 image. Right: color-composite image of NGC 6445 created with the [N ii] (red) and the residual H2 (green) images.
In order to alleviate the effects of the dense stellar field and better show the faint halo in H2, a residual image of NGC 6445 was created by subtracting the scaled Brγ image from H2. The factor used to scale the Brγ image was carefully chosen so that emissions of stars are mostly removed, and the nebular structures are best seen in the residual image. The [N ii] image was obtained by the Andalucía Faint Object Spectrograph and Camera (ALFOSC) on the 2.5 m Nordic Optical Telescope (NOT) at the Observatorio del Roque de los Muchachos (ORM, La Palma, Spain) in 2009 June. |
| Date | |
| Source | Extended Structures of Planetary Nebulae Detected in H2 Emission The Astrophysical Journal. 859 (2): 92. doi:10.3847/1538-4357/aac01e |
| Author | Xuan Fang, Yong Zhang, Sun Kwok, Chih-Hao Hsia, Wayne Chau, Gerardo Ramos-Larios, and Martín A. Guerrero |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:45, 28 December 2018 | | 1,500 × 754 (855 KB) | C messier | User created page with UploadWizard |
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