D
D. A. Harper
Researcher at Yerkes National Primate Research Center
Publications - 17
Citations - 719
D. A. Harper is an academic researcher from Yerkes National Primate Research Center. The author has contributed to research in topics: Far infrared & Infrared. The author has an hindex of 12, co-authored 17 publications receiving 687 citations.
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Journal ArticleDOI
Early science with sofia, the stratospheric observatory for infrared astronomy
E. T. Young,Eric E. Becklin,Eric E. Becklin,Pamela M. Marcum,Thomas Roellig,J. M. De Buizer,Terry Herter,Rolf Güsten,Edward W. Dunham,Pasquale Temi,B-G Andersson,Dana E. Backman,Dana E. Backman,Martin Burgdorf,Martin Burgdorf,L. J. Caroff,Sean C. Casey,Jacqueline A. Davidson,Edwin F. Erickson,Robert D. Gehrz,D. A. Harper,Paul M. Harvey,L. A. Helton,Scott D. Horner,Christian D. Howard,Randolf Klein,Alfred Krabbe,Ian S. McLean,Allan W. Meyer,J. W. Miles,Mark Morris,William T. Reach,Jeonghee Rho,Jeonghee Rho,Matthew J. Richter,H. P. Roeser,G. Sandell,Ravi Sankrit,Maureen L. Savage,Erin C. Smith,R. Y. Shuping,R. Y. Shuping,William D. Vacca,John E. Vaillancourt,Jürgen Wolf,Jürgen Wolf,Hans Zinnecker,Hans Zinnecker +47 more
TL;DR: The Stratospheric Observatory for Infrared Astronomy (SOFIA) is an airborne observatory consisting of a specially modified Boeing 747SP with a 2.7 m telescope, flying at altitudes as high as 13.7 km (45,000 ft) as discussed by the authors.
Journal ArticleDOI
A luminous 3 kiloparsec infrared disk in NGC 1068
TL;DR: A 10 micron map of the Seyfert galaxy NGC 1068 and airborne measurements of its angular extent in the far-infrared are presented in this article, where it is shown that the infrared emission originates primarily from two physically distinct regions; approximately half of the total infrared luminosity of 3 x 10 to the 11th solar luminosities is associated with the nucleus and half with a 3 kpc (35 arc sec) diameter disk surrounding it.
Journal ArticleDOI
Compact H II regions in the far-infrared
H. A. Thronson,D. A. Harper +1 more
TL;DR: In this paper, far-infrared (40-150 microns) observations of W51 (G49.5-0.4), K3-50, DR 21, NGC 7538, and W3(OH) are presented and discussed.
Journal ArticleDOI
The infrared emission of M17
TL;DR: Most of the infrared luminosity is generated within or very close to the ionized region, although the source is more extended at 100 µm than at shorter wavelengths as mentioned in this paper, and it is argued that the spectrum, spatial structure, and evolution of the nebula may be strongly influenced by spatial variations in density which were present when the exciting stars were formed.