Bibcode
Balcells, Marc; Borne, Kirk D.; Hoessel, John G.
Referencia bibliográfica
(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Phenomena in Galaxies, Puerto de la Cruz, Spain, July 4-15, 1988) Astrophysics and Space Science (ISSN 0004-640X), vol. 156, no. 1-2, June 1989, p. 215-222.
Fecha de publicación:
6
1989
Número de citas
1
Número de citas referidas
0
Descripción
This paper describes results obtained on a simulation of two
high-velocity encounters of NGC 4782/4783 and NGC 2672/2673 binary
elliptical galaxies which differ substantially in mass ratio (about 1
for the first pair, and about 10 for the second). CCD images and
velocities obtained from digital spectra were used to constrain
simulations of the galaxy collisions. The binary orbital elements, the
orientation of the orbit in the sky, the time since pericenter, and the
dynamical mass of the pair were derived. Results suggested that the
dumb-bell galaxy NGC 4782/4783 is not a supermassive galaxy, as was
claimed earlier on the basis of the high relative velocity and high
central dispersion, but has a moderate mass to luminosity ratio M/L(B)
of about 10. It was concluded that its trajectory changed from
hyperbolic to elliptical as a result of energy lost during the
collision. It was found that the NGC 2672/2673 also has a moderate
M/L(B) of about 7.