... Origin of Abundance Anomalies in H II Regions) The WF/PC-2 and the Space Telescope Imaging Spectrograph CCD and MA2) were used to perform a set of observations of emission-line diagnostics of the Orion Nebula, the brightest and best-resolved H II region ...
... in several ordinary reflection nebulae illuminated by stars having temperatures between 10,000 and 23,000 K. All these nebulae are known to also exhibit the infrared emission features called aromatic emission features (AEFs) attributed to large PAHs ...
... disks in the Orion Nebula) The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were used to make multi-wavelength imaging of circumstellar disks (NGC-1976) seen as silhouettes against the bright emission-line background in the Orion Nebula ...
... The Galactic reflection nebula NGC 7023 is a favorite object of dust researchers and deep sky enthusiasts. ... ACS and NICMOS was used to study the properties of Extended Red Emission (optical photoluminescence from dust) in this paper ...
... This spectrum was taken with the slit oriented along the bright bar of the nebula (see the PN images page ). ... The continuum between the emission lines is due to cool dust in the PN, with a typical temperature of roughly 150 K. The above ...
... USA . ISM and Circumstellar Matter . A Final Calibration of the Primary WFPC2 Emission-Line Filters Using the Orion Nebula . George . Pavlov . GO . ...
... Origin of Abundance Anomalies in H II Regions) The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD and MA2) were used to perform a set of observations of emission-line diagnostics of the Orion Nebula, the brightest and best-resolved H II region ...
... of Orion -- Probing the Origin of Abundance Anomalies in H II Regions) The Space Telescope Imaging Spectrograph (CCD) was used to perform a set of observations of emission-line diagnostics of the Orion Nebula, the brightest and best-resolved H II region ...