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- W1981189137 abstract "view Abstract Citations (254) References (49) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Structure of Merger Remnants. I. Bulgeless Progenitors Hernquist, Lars Abstract Mergers of identical galaxies consisting of self-gravitating disks and halos are studied in the context of the suggestion that such events may form elliptical galaxies. It is shown that the luminous remnants of such mergers do, indeed, share many common properties with observed ellipticals. In particular, the end states of the simulations reported here rotate slowly in regions of relatively high surface density, having typical values v/σ <~0.2 there. Rotation velocities rise sharply at large radii, but it is difficult to quantify this effect accurately owing to sampling errors. Nevertheless, kinematic studies of the outer envelopes of elliptical galaxies should elucidate the relevance of spiral mergers to their formation. Morphologically, the remnants display a variety of interesting structures, including shells and loops comprising loosely bound material and boxy and disky isophotes. The luminous matter is well-fitted by ellipsoidal generalizations of Hernquist's model for elliptical galaxies, implying that the surface brightness profiles are essentially de Vaucouleurs-like over a large radial interval. Unfortunately, the core radii of the remnants, relative to their effective radii, are much larger than those inferred for real ellipticals. In view of this result, it seems that mergers of pure stellar disks do not represent an attractive mechanism for the production of massive elliptical galaxies. Publication: The Astrophysical Journal Pub Date: December 1992 DOI: 10.1086/172009 Bibcode: 1992ApJ...400..460H Keywords: Elliptical Galaxies; Galactic Evolution; Galactic Structure; Interacting Galaxies; Astronomical Models; Galactic Rotation; Lenticular Bodies; Astrophysics; GALAXIES: ELLIPTICAL AND LENTICULAR; CD; GALAXIES: FORMATION; GALAXIES: INTERACTIONS full text sources ADS | Related Materials (4) Part 2: 1993ApJ...409..548H Part 3: 1993ApJ...416..415H Part 4: 1994ApJ...427..165H Part 5: 1996ApJ...463...69H" @default.
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- W1981189137 title "Structure of merger remnants. I - Bulgeless progenitors" @default.
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