New emission features in the infrared spectra of two IRAS sources

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184715· OSTI ID:6988562

De Muizon, M; Geballe, T R; Dhendecourt, L B; Baas, F

Observations of IRAS 21282 + 5050 and IRAS 03055 + 5819 (AFGL 437) obtained at 7.7-22.5 microns using the IRAS LRS during 1983 and at 3.1-3.8 microns using the 3.75-m UKIRT in September 1985, are reported and analyzed. The data are presented graphically, and the significance of three new nonatomic emission features at 3.46, 3.51, and 3.56 microns; the known emission features at 3.3, 3.40, 7.7, 8.6, and 11.3 microns; and the plateaus at 3.4-3.6 and above 11.5 microns is discussed in detail. It is suggested that the plateau and narrow features between 3.4 and 3.6 microns may be due to polycyclic aromatic hydrocarbons with attached molecular subgroups such as -CH/sub 3/ or -C/sub 2/H/sub 5/, a hypothesis developed by analogy to that proposed by Cohen et al. (1985), and Puget et al. (1985) for the 12-micron plateaus seen in many IRAS spectra. 26 references.

• Research Organization: Leiden Rijksuniversiteit, Sterrewacht, Netherlands; Paris Observatoire, Meudon, France; Stichting Astronomisch Onderzoek in Nederlands, Amsterdam; Edinburgh, Royal Observatory, U.K. Infrared Telescope Unit, Hilo, HI
• OSTI ID: 6988562
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 306; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMICAL COMPOSITION
COSMIC GASES
EMISSION SPECTRA
FLUIDS
GASES
INFRARED SPECTRA
INTERSTELLAR SPACE
MOLECULES
SPACE
SPECTRA
SPECTROSCOPY