974 resultados para Planar array
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Thesis (M.A.)--University of Illinois at Urbana-Champaign.
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"Contract AF33(616)-6079 Project No. 9-(13-6278) Task 40572. Sponsored by: Wright Air Development Center"
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"Contract AF33(616)-3220 Project No. 6(7-4600) Task 40572 Wright Air Development"
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Bibliography: p. 37-38.
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"Supported in part by the Advanced Research Projects Agency as administered by the Rome Air Development Center under contract no. US AF 30(602) 4144."
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Includes bibliographies.
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"April 1, 1969."
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Includes bibliographical references (page 61).
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Includes bibliographical references (page 43).
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Includes bibliographical references (page 43).
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"JPL Contract No. 955217."
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"August 1982."
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"Dec. 1983."
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Mode of access: Internet.
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We present the results of Australia Telescope Compact Array (ATCA) H i line and 20-cm radio continuum observations of the galaxy quartet NGC 6845. The H i emission extends over all four galaxies but can only be associated clearly with the two spiral galaxies, NGC 6845A and B, which show signs of strong tidal interaction. We derive a total H i mass of at least 1.8 x 10(10) M-., most of which is associated with NGC 6845A, the largest galaxy of the group. We investigate the tidal interaction between NGC 6845A and B by studying the kinematics of distinct H i components and their relation to the known H ii regions. No H i emission is detected from the two lenticular galaxies, NGC 6845C and D. A previously uncatalogued dwarf galaxy, ATCA J2001-4659, was detected 4.4 arcmin NE from NGC 6845B and has an H i mass of similar to5 x 10(8) M-.. No H i bridge is visible between the group and its newly detected companion. Extended 20-cm radio continuum emission is detected in NGC 6845A and B as well as in the tidal bridge between the two galaxies. We derive star formation rates of 15-40 M-. yr(-1).