The ionized gas in the center and in the bar of the spiral galaxy NGC 6946

1993 ◽  
Vol 406 ◽  
pp. 60 ◽  
Author(s):  
Jean-Rene Roy ◽  
Julien Belley
Keyword(s):  
Spiral Galaxy ◽  
Ionized Gas ◽  
Ngc 6946

scholarly journals Ionized gas characteristics in the cavities of the gas and dust disc of the spiral galaxy NGC 6946

2011 ◽  
Vol 66 (3) ◽  
pp. 304-319 ◽  
Author(s):  
Yu. N. Efremov ◽  
V. L. Afanasiev ◽  
O. V. Egorov
Keyword(s):  
Spiral Galaxy ◽  
Ionized Gas ◽  
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).

Discrete Radio Sources in the Spiral Galaxy NGC 6946

2000 ◽  
Vol 119 (4) ◽  
pp. 1711-1719 ◽  
Author(s):  
Scott D. Hyman ◽  
Christina K. Lacey ◽  
Kurt W. Weiler ◽  
Schuyler D. Van Dyk
Keyword(s):  
Spiral Galaxy ◽  
Radio Sources ◽  
Ngc 6946 ◽  
Discrete Radio Sources

Diffused ionized gas in the spiral galaxy M31

1994 ◽  
Vol 431 ◽  
pp. 156 ◽  
Author(s):  
Rene A. M. Walterbos ◽  
Robert Braun
Keyword(s):  
Spiral Galaxy ◽  
Ionized Gas

scholarly journals Magnetic Fields in the Spiral Galaxy NGC 6946

1993 ◽  
Vol 157 ◽  
pp. 311-312
Author(s):  
Matthias Ehle ◽  
Rainer Beck
Keyword(s):  
Magnetic Field ◽  
Spiral Galaxy ◽  
High Frequency ◽  
Uniform Magnetic Field ◽  
Large Scale ◽  
Dynamo Model ◽  
Model Parameters ◽  
Radio Waves ◽  
Spiral Pattern ◽  
Ngc 6946

High frequency polarization observations reveal the existence of a large-scale ordered magnetic field in the disk of the spiral galaxy NGC 6946. At lower frequencies the disk is no longer transparent to polarized radio waves due to Faraday depolarization. The spiral pattern of the uniform magnetic field and the distribution of polarized intensities are fairly well simulated by a dynamo model. The model parameters indicate that the dynamo does not only operate in the disk, but also in the halo.

scholarly journals Fabry-Perot observations of the ionized gas in the spiral galaxy NGC 6951

2002 ◽  
Vol 386 (1) ◽  
pp. 42-59 ◽  
Author(s):  
M. Rozas ◽  
M. Relaño ◽  
A. Zurita ◽  
J. E. Beckman
Keyword(s):  
Spiral Galaxy ◽  
Ionized Gas ◽  
Fabry Perot
Sign in / Sign up

Export Citation Format

Share Document