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Record 14 of 664
Two high-velocity encounters of elliptical galaxies
External Online Source: doi:10.1007/BF00646369
Author and Affiliation:
Balcells, Marc(Washburn Observatory, Madison, WI, Space Telescope Science Institute, Baltimore)
Borne, Kirk D.(Space Telescope Science Institute, Baltimore, MD, United States)
Hoessel, John G.(Washburn Observatory, Madison, WI, United States)
Abstract: 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.
Publication Date: Jun 01, 1989
Document ID:
(Acquired Nov 28, 1995)
Accession Number: 89A53056
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysics and Space Science; (ISSN 0004-640X); 156; 1-2,
Publisher Information: Netherlands
Contract/Grant/Task Num: NAS7-918
Financial Sponsor: NASA; United States
Organization Source: Wisconsin Univ.; Madison, WI, United States
Space Telescope Science Inst.; Baltimore, MD, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
Imprint And Other Notes: (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.
Availability Source: Other Sources
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