A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations

Details A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...240..237d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 240, no. 2, Dec. 1990, p. 237-246.

Astronomy and Astrophysics

Astronomy

45

Astronomical Spectroscopy, Carbon Monoxide, Peculiar Galaxies, Radio Astronomy, Spiral Galaxies, Charge Coupled Devices, H Alpha Line, Interstellar Magnetic Fields, Linear Polarization, Star Formation, Very Large Array (Vla), Galaxies, Radio Continuum, Linear Radio Polarization, Magnetic Fields, Kinematics Of Galaxies, Co, Molecular Gas, Ngc 1808

Scientific paper

We have observed the peculiar galaxy NGC 1808 in the CO line and in the radio continuum using the SEST1 and the VLA 2 Linear radio polarization is found, with degrees of up to 30% outside the central active region, indicating the presence of a large-scale magnetic field. A comparison of the 20 cm and 6cm radio continuum data yields a steep spectral index for the central region, suggesting a predominantly nonthermal origin of the emission.
The CO distribution shows a central concentration. The velocity field is disturbed, hinting at peculiar motions of molecular gas within the minor axis regions. Evidence is found for a rotating molecular ring of about 1.4 kpc diameter. The ratio of the CO (2-1)/CO (1 -0) lines of ≥ 1 is characteristic for an optically thin, hot gas, similar to that seen in M 82.
Hα observations reveal the presence of a linear string of H II clumps directed away from the central starburst region, most likely not coincident with the disk of the galaxy. Its possible origin as well as the resemblence of the central starburst regions of NGC 1808 and M82 are discussed.

Affiliated with

Also associated with

No associations

Rating

A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations 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 A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A comprehensive study of the peculiar spiral galaxy NGC 1808. I - Radio continuum and CO line observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1628086