Zobrazeno 1 - 10
of 62
pro vyhledávání: '"L. T. Little"'
Autor:
Brian N. Ellison, B.D. Jackson, C.T. Cunningham, L. T. Little, Mark C. Price, V. Natale, D. N. Matheson, S.R. Davies, T. Jones, S.M.X. Claude
Publikováno v:
International Journal of Infrared and Millimeter Waves. 24:639-650
We describe a new Nb SIS junction heterodyne waveguide receiver working in the frequency range between 800–810 GHz. The receiver is light and compact and is designed to fit most infrared and optical telescopes with the minimum of reconfiguration. W
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 326:927-936
Maps of the 450 micron and 850 micron dust continuum emission from three star-forming condensations within the Lynds 1630 molecular cloud, made with the SCUBA bolometer array, reveal the presence of four new submillimetre sources, each of a few solar
Autor:
Robin R. Phillips, L. T. Little
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 317:179-191
We have written and tested a computer modelling program to solve line-radiative transfer in any cloud with axial symmetry using a lambda interation method. It can accept any axially symmetric velocity field, thus enabling the modelling of such object
Autor:
L. T. Little, A. G. Gibb
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 313:663-670
We report the discovery of high-velocity dense gas from a bipolar outflow source near NGC 2068 in the L1630 giant molecular cloud. CO and HCO+J=32 line wings have a bipolar distribution in the vicinity of LBS 17-H with the flow orientated roughly eas
Autor:
Andy Gibb, L. T. Little
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 295:299-311
We describe observations of the (CO)-O-18 J = 2 --> 1, 3 --> 2 and C I P-3(1) --> P-3(0) lines towards the HH24-26 molecular cloud core. The (CO)-O-18 traces the north-south molecular ridge, but the dense clumps identified by previous high-resolution
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 294:635-641
(CO)-O-18 J = 2-1, (CO)-O-17 J = 2-1 and [C I] P-3(1)-P-3(0) emission from the dense cold cloud B335 has been observed and modelled in order to determine the C/CO ratio. The observed ratio is compared with a prediction by Tarafdar who assumes a mecha
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 294:105-117
Maps are presented of P-3(1)-->P-3(0) [C I] and J=2-->1 (CO)-O-18 line emission from the interstellar molecular cloud G35.2-0.74N. The maps are interpreted with reference to a previous model for the structure of the cloud in which opposing jets from
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 271:649-661
A model for the structure of the massive molecular cloud G 34.3 + 0.2 is derived from extensive observations of carbon monoxide lines, including J = 1-0, J = 2-1, J = 3-2 and J = 6-5 (CO)-C-13, and J = 2-1 (CO)-O-18. The model consists of a slowly co
Autor:
L. T. Little, S. R. Davies
Publikováno v:
International Journal of Infrared and Millimeter Waves. 15:935-942
The construction of SIS heterodyne imaging arrays for submillimetre wave-lengths requires multiple coupling of the local oscillator signal. The quasi-optical analogue of a multiple cross-guide coupler, employing 45° beam-splitters successively stack
Publikováno v:
International Journal of Infrared and Millimeter Waves. 13:659-667
The comparison of a 240 GHz SIS heterodyne receiver with a Schottky diode receiver at the Maxwell telescope revealed difficulties with its calibration using continuum loads. The difficulties arise from the fact that the local oscillator power is not