Spectral-line observations of NGC 5128 at centimetre wavelengths

Details Spectral-line observations of NGC 5128 at centimetre wavelengths Spectral-line observations of NGC 5128 at centimetre wavelengths

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pasau...3...63g&link_type=abstract

(Astronomical Society of Australia, Annual General Meeting, 10th, Sydney, Australia, May 12-14, 1976.) Astronomical Society of A

Astronomy and Astrophysics

Astronomy

51

Absorption Spectra, Astronomical Spectroscopy, Galactic Nuclei, Galactic Radiation, Formaldehyde, Hydrogen Atoms, Hydroxyl Emission, Interstellar Gas, Line Spectra, Molecular Spectra, Radio Sources (Astronomy)

Scientific paper

The Parkes 64-m radio telescope has been used to make H I and H2CO observations of the lenticular galaxy NGC 5128 with improved resolution and to detect OH absorption in the same galaxy. The H I profile (4 km/s resolution) is shown to be generally typical of any edge-on galaxy with well-defined rotation. The H I mass is estimated to be about 1 billion solar masses, and a total mass of 400 billion solar masses is derived on the assumption that the galaxy is viewed edge-on. Five H I absorption components are identified, with the strongest at 551 km/s centered on the optical nucleus. The 1667-MHz OH observations (0.8 km/s resolution) yield absorption features at 551 km/s and possibly at 546 km/s. The 4830-MHz H2CO spectrum, obtained with a resolution of 0.5 km/s, shows three well-defined absorption features together with a fainter feature at 547.9 km/s. Additional H2CO absorption was detected southeast of the nucleus. Noting that all the absorption velocities are higher than the systematic velocity of 535 km/s, it is concluded that if the absorption is against the nucleus, such velocities can only be explained by infalling gas clouds probably associated with the dust lane.

Affiliated with

Also associated with

No associations

Rating

Spectral-line observations of NGC 5128 at centimetre wavelengths 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 Spectral-line observations of NGC 5128 at centimetre wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectral-line observations of NGC 5128 at centimetre wavelengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1416363