Abstract
We discuss the observation of unidentified infrared (UIR) band emission at a wavelength of 3.3 μm from the galactic plane region (42° < l < 55°, |b| < 5° with the Near-Infrared Spectrometer (NIRS) on board the Infrared Telescope in Space (IRTS). The result shows that the 3.3 μm UIR band emission in the diffuse interstellar medium has been clearly detected, and its intensity correlates well with the IRAS 12 μm and 100 μm intensities everywhere in the observed region. The ratios of the 3.3 μm UIR band intensity (ΔλIλ) to the 12 μm and 100 μm intensities (λIλ) are (8.2 ± 2.5) × 10−3 and (2.9 ± 0.9) 10−3, respectively. The good correlation with the 100 μm intensity indicates that the 3.3 μm UIR band emitter is well mixed with the classical dust grains with sub-micron size in the general interstellar medium.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.