Do the Infrared Emission Features Need Ultraviolet Excitation?
نویسندگان
چکیده
منابع مشابه
Do the Infrared Emission Features Need Ultraviolet Excitation ?
We present the results of imaging spectroscopy of the reflection nebula vdB 133, obtained with the infrared camera and circular variable filter wheel on the Infrared Space Observatory (1S0). Our observations reveal the infrared emission features (IEFs), at 6.2, 7.7, 8.6, 11.3, and 12.7 pm, and associated 5 – 15 pm continuum emission. The stellar system illuminating vdB 133 has the lcjwest ratio...
متن کاملDo the Infrared Emission Features Need Ultraviolet Excitation 1 ?
We present the results of imaging spectroscopy of the reflection nebula vdB 133, obtained with the infrared camera and circular variable filter wheel on the Infrared Space Observatory (ISO). Our observations reveal the infrared emission features (IEFs), at 6.2, 7.7, 8.6, 11.3, and 12.7 μm, and associated 5 – 15 μm continuum emission. The stellar system illuminating vdB 133 has the lowest ratio ...
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One of the major challenges to identification of the 3.3, 6.2, 7.7, 8.6, and 11.3 lm interstellar infrared (IR) emission bands with polycyclic aromatic hydrocarbon (PAH)molecules has been the recent detection of these bands in regions with little ultraviolet (UV) illumination, since small, neutral PAHmolecules have little or no absorption at visible wavelengths and therefore require UV photons ...
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High signal to noise ratio is important within non-destructive testing. To achieve automatic inspection, including automatic evaluation, it is even more important. Infrared thermography is a suitable method for automatic inspection. One drawback with thermography of metallic structures is that due to shiny surfaces the reflectance is high and the signal to noise ratio will be low. This paper pr...
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We present long-slit 7.5–13.5 mm spectra of WL 16, a Herbig Ae star in the r Ophiuchi dark cloud that is surrounded by a ∼1000 AU diameter infrared-emitting nebula. Mid-IR emission features are detected in every region of the nebula from center to edge, and the underlying continuum color temperature is approximately 10 times hotter than would be expected from large grains in thermal equilibrium...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1998
ISSN: 0004-637X
DOI: 10.1086/311136