MWC 645 and MWC 819: Two stars resembling eta carinae
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Swings, J. P.↗
Engineering topics
Allen, D. A.
Publications and source records attributed to Allen, D. A..
Infrared photometry of Northern Wolf-Rayet stars.
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Allen, D. A.↗
The peculiar nebula M2-9.
The spectrum of M2-9 is analyzed and its strong infrared excess and internal motions are described. It is suggested that M2-9 is a previously unannounced member of the class of objects possessing strong Fe II emission lines in their spectra and having prominent infrared continua.
Allen, D. A.↗
Infrared objects in H II regions.
The discovery of 2-micron emission sources in NGC 2264, IC 2087, and M1-82, and of prominent infrared emission in Lk H-alpha 198 and V376 Cas is reported. Of the 25 objects found by scanning around the H II regions, less than half would appear to be late-type stars.
Allen, D. A.↗
The nature of Becklin's star.
The IR point source in the Orion Nebula commonly known as Becklin's star appears to be exceptional because of its extreme colors and the lack of any associated optical object. Characteristics of the spectrum of Becklin's object are examined. It is found that the spectrum is consistent with that of a highly reddened early-type supergiant, in which weak absorption has been masked by low resolution.
Penston, M. V.↗
The infrared object HD 45677
IR stellar object HD 45677, discussing IR spectral energy distribution in terms of black body temperature range
Allen, D. A.↗
Infrared studies of the lunar terrain. II
IR study of thermal anomalies during lunar night, discussing ages and distribution on terrain
Allen, D. A.↗
Infrared studies of the lunar terrain. I - The background moon
Unlit lunar limb observations at IR wavelengths, presenting temperature charts and thermal abnormalities
Allen, D. A.↗
Infrared photometry of Saturn, Titan, and the rings
Saturn, Titan and ring IR photometric observations, examining brightness temperature albedos, optical thickness and individual particles
Allen, D. A.↗
Infrared diameter of Vesta
Vesta diameter and albedo determination by IR emission measurements, allowing for roughness and rotation
Allen, D. A.↗
Lunar thermal anomalies - Infrared observations.
Lunar thermal anomalies in various craters observed during lunar night by IR methods, with data suggesting hot and cold regions
Allen, D. A.↗
The infrared sources in the Trapezium region of M42.
Double structure in IR near Trapezium region of M42 in Orion Nebula center
Allen, D. A.↗