planetary nebula Archives

A.1. Location of CO2 ice in NGC 6302. The image shows HST/WFC3 observations featuring filter F656N (Kastner et al. 2022), which traces Hα emission. The JWST MIRI mosaic is indicated by the white frame. Contours show the column density of gas-phase CO2, with corresponding log N values (cm−2 ) provided in the lower left. The yellow dot marks the pixel position (R.A. = 17h :13m :44.402s , Dec. = - 37◦ :06′ :10.23 (J2000))used to extract the spectra shown in the Figs. 1, 2, B.1, C.1. - astro-ph.GA

Astrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report

Detection Of CO2 Ice In The Planetary Nebula NGC 6302

by Keith CowingFebruary 28, 2026February 28, 2026

Using JWST/MIRI observations, we report the detection of CO2 ice in the dusty torus of the planetary nebula NGC 6302, an environment generally considered hostile to fragile molecular species and […]

The IUE spectra (black line) of IC 418, Hen 2-5, IC 2501 and Tc 1 (upper-left, upper-right, bottom-left and bottom-right panel, respectively) are shown along with the nebular continuum (purple dashed-line) and stellar atmosphere (blue dash-dotted) models as well as the composite model (red line). The IUE sigma are marked as a filled grey area. -- astro-ph.SR

Astrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Interstellar, Status Report

An Ultraviolet Spectral Study Of Fullerene-rich Planetary Nebulae

by Keith CowingJanuary 19, 2024January 19, 2024

Several planetary nebulae (PNe) have been found to contain both polycyclic aromatic hydrocarbon (PAH-like) species and fullerenes (C60) distinguished by their mid-infrared emission.