Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...179..101m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 179, no. 1-2, June 1987, p. 101-107.
Astronomy and Astrophysics
Astrophysics
25
Galactic Evolution, Interacting Galaxies, Interstellar Gas, Ionized Gases, Radial Velocity, Velocity Distribution, Fabry-Perot Interferometers, Galactic Rotation, Isophotes, Red Shift
Scientific paper
The radial velocities of the ionized gas in the double system of galaxies NGC 7752 - 53 have been measured with a scanning Perot-Fabry interferometer and a two-dimensional photon counting system (the CIGALE equipment). The velocity field shows that the pair is not so loose as previously thought. Both redshifts are now determined with an uncertainty of only 10 km s-1, 5160 km s-1 for NGC 7753 and 4940 km s-1 for NGC 7752 (heliocentric velocities). The mass of NGC 7753 (up to the companion) is about 1.3×1011M_sun; and that of NGC 7752 (within a 18arcsec radius) about 1.8×1010M_sun;. Both galactic disks are warped because of the interaction. Tidal interaction between the tip of the western arm of the main galaxy and the north-east side of the companion may explain the velocity perturbations observed there.
Boulesteix Jacques
Georgelin Yvon
Le-Coarer Etienne
Marcelin Michel
Monnet Guy
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