ПОЛОСТИ В ГАЗОВОМ ДИСКЕ ГАЛАКТИКИ NGC 6946

2018 ◽  
Keyword(s):  
Ngc 6946

scholarly journals Quantifying Resonant Structure in NGC 6946 from Two-dimensional Kinematics

2007 ◽  
Vol 667 (2) ◽  
pp. L137-L140 ◽  
Author(s):  
Kambiz Fathi ◽  
Silvia Toonen ◽  
Jesús Falcón-Barroso ◽  
John E. Beckman ◽  
Olivier Hernandez ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Resonant Structure ◽  
Ngc 6946

scholarly journals Studying the contribution of components and type of spiral galaxy NGC 6946 using digital image processing

2019 ◽  
Vol 13 (28) ◽  
pp. 27-32
Author(s):  
A. K. Ahmed
Keyword(s):  
Spiral Galaxy ◽  
Rough Sets ◽  
Essential Element ◽  
National Research Institute ◽  
Astronomical Image ◽  
Ngc 6946 ◽  
Time Required ◽  
Variable Precision Rough Sets ◽  
Source Of Information ◽  
Classified Image

NGC 6946 have been observed with BVRI filters, on October 15-18,2012, with the Newtonian focus of the 1.88m telescope, Kottamiaobservatory, of the National Research Institute of Astronomy andGeophysics, Egypt (NRIAG), then we combine the BVRI filters toobtain an astronomical image to the spiral galaxy NGC 6946 whichis regarded main source of information to discover the components ofthis galaxy, where galaxies are considered the essential element ofthe universe. To know the components of NGC 6946, we studied itwith the Variable Precision Rough Sets technique to determine thecontribution of the Bulge, disk, and arms of NGC 6946 according todifferent color in the image. From image we can determined thecontribution for each component and its percentage, then what is thepercentage mean. In this technique a good classified image resultand faster time required to done the classification process.

scholarly journals Spectroscopy of H II regions in the late-type spiral galaxy NGC 6946

2013 ◽  
Vol 68 (1) ◽  
pp. 40-52 ◽  
Author(s):  
A. S. Gusev ◽  
F. H. Sakhibov ◽  
S. N. Dodonov
Keyword(s):  
Spiral Galaxy ◽  
H Ii Regions ◽  
Late Type ◽  
Ngc 6946

scholarly journals A 158μm [CII] Map of NGC 6946: Detection in Extragalactic Atomic and Ionized Gas

1992 ◽  
Vol 150 ◽  
pp. 117-119
Author(s):  
S. C. Madden ◽  
N. Geis ◽  
R. Genzel ◽  
F. Herrmann ◽  
A. Poglitsch ◽  
...  
Keyword(s):  
Infrared Imaging ◽  
Line Emission ◽  
Far Infrared ◽  
Max Planck ◽  
Ionized Gas ◽  
Ob Stars ◽  
Ngc 6946 ◽  
Total Luminosity ◽  
Fabry Perot ◽  
External Galaxies

The first observations of the [CII] line toward the nuclei of gas-rich external galaxies, showed that the far-infrared line emission contributes up to 1% of the total luminosity and most likely originates from dense photon-dominated regions (PDRs) associated with the surfaces of molecular clouds exposed to FUV from external or embedded OB stars (Crawford et al. 1985, Lugten et al. 1986, Stacey et al. 1991). We have mapped the [CII] emission toward NGC 6946 over an 8' × 6' (23 × 17 kpc) (Madden et al. 1991) using the Max-Planck Instutute/U.C.Berkeley Far-Infrared Imaging Fabry-Perot Interferometer (FIFI) on the Kuiper Airborne Observatory (KAO).

scholarly journals Spiral structure and distribution of stellar associations in NGC 6946

1970 ◽  
Vol 38 ◽  
pp. 87-90
Author(s):  
E. Ye. Khachikian ◽  
K. A. Sahakian
Keyword(s):  
Spiral Structure ◽  
Absolute Magnitude ◽  
Colour Index ◽  
Spiral Arms ◽  
Ngc 6946 ◽  
Stellar Associations

The associations of NGC 6946 outline its spiral arms. There is no relation between the colour or magnitude of the associations and their distance from the centre. Their mean absolute magnitude is −11m.1 and their mean colour index near zero.

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