منابع مشابه
Detection of widely distributed UIR band emission in the disk of NGC 891 ?
The spectrum of the unidentified infrared (UIR) emission bands between 5.9 and 11.7 μm has been observed for the first time in the disk of an external galaxy. We have used the low-resolution spectrometer of the ISOPHOT instrument aboard ISO. The UIR bands at 6.2, 7.7, 8.6, and 11.3 μm have absolute intensities which are similar to the values observed for the diffuse emission of our own Galaxy. ...
متن کاملCO band emission from MWC 349
We observed the near infrared emission in the wavelength range 2.28–2.5μm from the peculiar B[e]-star MWC 349. The spectra contain besides the strong IR continuum the first overtone CO bands and most of the hydrogen recombination lines of the Pfund series, both in emission. We also modeled the spectra. The Pfund lines have a gaussian profile with a FWHM of ∼ 100 km/s, and it turned out that the...
متن کاملSpontaneous Emission Spectrum from a Driven Three-Level Atom in a Double-Band Photonic Crystal
Abstract The spontaneous emission spectrum from a driven three-level atom placed inside a double-band photonic crystal has been investigated. We use the model which assumes the upper levels of the atomic transition are coupled via a classical driving field. The transition from one of the upper levels to lower level couples to the modes of the modified reservoir, and the transition from the oth...
متن کاملSpectrophotometry of UIR bands in the diffuse emission of the galactic disk
The spectrum of the unidentified infrared (UIR) emission bands between 5.8 and 11.6 m has been observed for the first time for the diffuse emission of the galactic disk where the interstellar radiation field (ISRF) is quite low. The UIR bands at 6.2, 7.7, 8.6, and 11.3 m have absolute intensities which are 1/10th of the values observed in planetary and reflection nebulae. However, the intensity...
متن کاملObservational investigation of mass loss of M supergiants
We present the analysis of infrared photometry and millimeter spectroscopy of a sample of 74 late-type supergiants. These observations are particularly suitable to study the mass loss and the circumstellar envelopes of evolved massive stars. In particular, we quantify the circumstellar infrared excess, the relation of mass loss with stellar properties, using the K-[12] colour index as mass-loss...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1994
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/266.3.640