From: Spudboy100@aol.com
Date: Thu Jun 27 2002 - 23:10:01 MDT
Might these papers be a sign of galactic engineering by hyper advanced
species? Hell no! Its just my version of pretending that that the canals on
Mars were not canyons, but sign of advanced civilization. This is the 2002
flavor, rather then the 1876 Chiaparelli vanilla version.
Title: Warps and Rotation Curves in Edge-On Galaxies
Authors: D. Vergani, G. Gentile, R.-J. Dettmar, G. Aronica, U. Klein
Comments: 6 pages, 3 figures, mostly colour. Oral contribution at the 'ALMA
extragalactic and Cosmology Science Workshop on Dark Matter', Bordeaux,
France, 22-24 May 2002. To be published in electronic form at this http URL
We present our investigation on the effect of warps on the extraction of
rotation curves in edge-on galaxies. The method to derive the rotation curve
from the position-velocity diagram in warped edge-on systems yields
underestimated velocities, and the tilted-ring model is not reliable in
highly inclined, poorly resolved galaxies. In a warped system the kinematical
major axis is different from the optical major axis. While this is generally
a limit in optical slit spectroscopy, in the HI emission which extends far
from the optical body where self-gravity is weaker and the effect of warping
is more pronounced, this represents a severe effect to be considered in the
procedure to extract the rotation curve. We propose a new approach to extract
the rotation curve in highly inclined, warped galaxies. Based on this method
we are able to trace accurately the frequency of peculiarities in our sample
of Thick Boxy Bulge (TBB) galaxies. We report an increasing trend of
kinematical lopsidedness from spheroidal bulge galaxies towards TBB galaxies.
Concerning the question whether interactions contribute significantly to the
bar formation and to the subsequent evolution in a box/peanut (b/p)
structure, we confirm these theoretical predictions. Based on our sample,
galaxy interaction is the likely formation mechanism to trigger bars in TBB
galaxies. (102kb)
astro-ph/0206481
ALSO::
Is the following the 1st sign of a matrioska brain? We should be so lucky.
And, of course were are not. Still..
astro-ph/0206470 [abs, ps, pdf, other] :
Title: An unusually low mass of some "neutron" stars?
Authors: D. Gondek-Rosinska, W. Kluzniak, N. Stergioulas
Comments: 4 pages, 1 figure, submitted to A&A
The X-ray emission of RXJ1856.5-3754 has been found to coincide to
unprecedented accuracy with that of a blackbody, of radius 5.8+-0.9 km for
the measured parallax distance of 140 pc (Burwitz et al. 2001, Drake et al.
2002). If the emission is uniform over the whole surface of a non-rotating
star, the mass of the star cannot exceed 0.75+-0.12 solar mass regardless of
its composition. If the compact object is a quark star described by the
MIT-bag equation of state (a ``strange star''), the mass is no more than 0.3
solar mass. Comparably small masses are also obtained for the X-ray bursters
Aql X-1 and KS1731-260 for some fits to their spectra. (26kb)
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