Quantifying Resonant Structure in NGC 6946 from Two-dimensional Kinematics
نویسندگان
چکیده
منابع مشابه
Kinematics of two dwarf galaxies in the NGC 6946 group
We present high velocity resolution (∼ 1.6 km s) Giant Meterwave Radio Telescope (GMRT) HI 21 cm synthesis images of the dwarf galaxies KK98 250 and KK98 251, as well as optical broad band images of KK98 250. We find that, despite being faint (MB . −14), both galaxies have regular velocity fields. In both cases the velocity fields are consistent with rigid body rotation. We derive rotation curv...
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We present sub-millimetre images of the spiral galaxy NGC 6946 at 450 and 850 µm. The observations have been carried out using the scan/map imaging mode of the Sub-millimetre Common User Bolometer Array (SCUBA) at the James Clark Maxwell Telescope (JCMT). The comparison with a 12 CO(2-1) line emission map from IRAM and with an U-band image, clearly shows that the 850 µm emission is associated w...
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Wide-field images of NGC 6946 in linear optical polarization are presented. In large parts of the galaxy the polarization pattern delineates a spiral structure, in partial agreement with the radio polarization data. A possible explanation of such a pattern is the alignment of elongated dust grains in the regular interstellar magnetic field. The optical degree of polarization anti-correlates wit...
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A study is presented of the central structure and kinematics of the galaxy NGC 6951, by means of broad band BIJK images and high resolution high dispersion longslit spectroscopy, together with archival HST WFPC2 V and NICMOS2 J and H images. We find that there is little ongoing star formation inside the bar dominated region of the galaxy, except for the circumnuclear ring at 5 arcsec radius. Th...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2007
ISSN: 0004-637X,1538-4357
DOI: 10.1086/522204