The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891

Details The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891 The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246...10h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. 10-20.

Astronomy and Astrophysics

Astronomy

48

Cosmic Rays, Galactic Radio Waves, Halos, Radio Spectra, Spiral Galaxies, Astronomical Maps, Radiant Flux Density, Radio Astronomy, Radio Emission, Very Large Array (Vla)

Scientific paper

Radio continuum measurements of the edge-on spiral galaxy NGC891 at 217 MHz, 610 MHz, and 1.49 GHz are presented. The radio spectrum of the total emission was found to show a sudden break of about 0.2 at a break frequency of near 0.8 GHz. A large fraction of the total emission at 1.49 GHz (about 65 percent) is in a halo component. The exponential scale heights are 0.8 and 1.0 kpc on the eastern and western side, respectively. The eastern side shows a peanut-shape morphology. The southwestern part exhibits an extension with a scale height of about 2 kpc. The low- and high-frequency spectral indices in the galaxy plane show a difference of 0.3. Compared to NGC 4631, the radio halo of NGC 891 is less extended and has less energy stored in the relativistic electrons and B-field. The energy densities in cosmic rays and B-field are higher. The results are consistent with models for a dynamical halo in which adiabatic energy losses, caused by a galactic wind, are significant at lower energies.

Affiliated with

Also associated with

No associations

Rating

The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The large-scale radio continuum structure of the edge-on spiral galaxy NGC 891 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1277613