Deep H [CSC]i[/CSC] Survey of the Spiral Galaxy NGC 2403
نویسندگان
چکیده
منابع مشابه
appear in AJ Deep H I Survey of the Spiral Galaxy NGC 2403 Filippo Fraternali
High sensitivity H I observations of the nearby spiral galaxy NGC 2403 obtained with the VLA are presented and discussed. The properties of the extended, differentially rotating H I layer with its H I holes, spiral structure and outer warp are described. In addition, these new data reveal the presence of a faint, extended and kinematically anomalous component. This shows up in the H I line prof...
متن کامل2 00 1 A new , kinematically anomalous H I component in the spiral galaxy NGC 2403
We discuss new, high sensitivity H I observations of the spiral galaxy NGC 2403 which show extended emission at anomalous velocities with respect to the ‘cold’ disk. This ‘anomalous’ gas component (∼ 1/10 of the total H I mass) is probably located in the region of the halo and rotates more slowly (∼ 20−50 km s) than the gas in the disk. Moreover, it shows a distortion in the velocity field that...
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We have measured the H I power spectrum of the nearly face-on spiral galaxy NGC 628 (M74) using a visibility-based estimator. The power spectrum is well fitted by a power law P(U) = AU , with α = −1.6 ± 0.2 over the length-scale 800 pc to 8 kpc. The slope is found to be independent of the width of the velocity channel. This value of the slope is a little more than one in excess of what has been...
متن کاملObjects in the Spiral Galaxy Ngc
Several strange objects in the spiral galaxy NGC 6946 are described. One of these objects is the giant stellar complex noted long ago; we suggested that its sharp semicircular western edge is a result of the ram pressure, arising owing to motion of this complex through the H I halo of NGC 6946. We found another enigmatic object, proposing for it the name Red Ellipse; it is located within the is...
متن کاملThe HI halo of NGC 2403
The position-velocity diagram along the major axis of the Sc galaxy NGC 2403 shows the presence of gas with anomalous velocities (see Fig. 3 of the paper by Sancisi et al., this conference). This is the signature of an extended, slower rotating HI halo surrounding the thin disk (Schaap et al., 2000) We have isolated the ‘anomalous gas’ in NGC 2403 by fitting a Gaussian line profile to the thin ...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2002
ISSN: 0004-6256,1538-3881
DOI: 10.1086/340358