arXiv subjects

Johann Albers

Publications and source records attributed to Johann Albers.

4 recordsLinked to original sources

arXiv2004

Quenching of lamellar ordering in an n-alkane embedded in nanopores

We present an X-ray diffraction study of the normale alkane nonadecane C_{19}H_{40} embedded in nanoporous Vycor glass. The confined molecular crystal accomplishes a close-packed structure by alignment of the rod-like molecules parallel to the pore axis while sacrificing one basic principle known from the bulk state, i.e. the lamellar ordering of the molecules. Despite this disorder, the phase transitions observed in the confined solid mimic the phase behavior of the 3D unconfined crystal, though enriched by the appearance of a true rotator phase known only from longer alkane chains.

cond-mat.soft↗

arXiv1998

Anomalous Gravitational Effects in the Universe

Based on previously published alternative reflections on gravitation, additional conclusions concerning anomalous gravitational effects in the universe are derived. For systems with spherical mass distribution and high central density of the luminous matter, abnormal increases in the gravitational potential towards the centers of these systems are derived. These anomalous increases are calculated on the basis of the amount and distribution of the observed luminous matter. For spiral galaxies, the calculation yields the astonishing result that the anomalous part of the gravitational potential is not produced by the large mass of the spiral system but by the small mass of the central bulge. A noticeable anomalous increase can only be expected close to the center, e.g. in the innermost region with a diameter on the order of only 1 pc in a bulge with a radius of 500 pc. Experimental observations are cited reporting such anomalous gravitational effects in the four spherical systems considered: globular star clusters, the bulges of spiral galaxies, elliptical galaxies, and clusters of galaxies. Conventionally, on the basis of Newtonian Mechanics and the amount of luminous matter, these effects are unexpected. They are most commonly explained by assuming the existence of appropriate large black holes or a sufficient amount of dark matter.

astro-ph↗

arXiv1997

Mass-Diameter Relation of Globular Star Clusters, Elliptical Galaxies and Spherical Clusters of Galaxies

In a preceeding paper alternative reflections on gravitation were developed. There it was assumed that the primary interaction between two masses is not of attractive but of repulsive nature. The repulsive force results from the impuls transfer produced by the gravitational radiation which is emitted and absorbed by both masses. The observed attractive force between the two masses according to Newton`s law of gravitation, however, is a secondary effect and a consequence of the existence of all the masses in the universe. The mutual screening of the gravitational radiation of all masses of the universe by the two masses under consideration leads to the gravitational attraction between them. The balance between primary, repulsive and secondary, attractive forces can stabilize highly concentrated spherical mass accumulations with a linear dependence of their mass on the square of their diameter. Such objects can really be observed in the universe in the form of globular star clusters, elliptical galaxies and spherical clusters of galaxies. The scatter of the data of every group is rather large. But the collection of the objects of all three groups, reaching from the smallest globular star cluster to the largest spherical cluster of galaxies, with masses differing by almost 12 orders of magnitude, clearly shows the proposed mass-diameter relation.

physics.gen-ph↗

arXiv1997

Alternative Reflections on Gravitation

It is assumed that the primary interaction between two masses m1 and m2 is not attractive as postulated by Newton's law of gravitation, but repulsive. Both m1 and m2 emit and absorb gravitational radiation. Corresponding to the laws of optics the absorption is connected with an impulse transfer that produces the repulsive force. If, however, m1 and m2 are embedded in the gravitational radiation produced by all the masses of the universe the absorption by m1 and m2 leads to a reduction of the intensity of the gravitational radiation between them, thus creating an attractive force exactly as described by Newton's law. The so called universal gravitational constant is no constant. It locally depends on the arrangement of the masses in the universe. It can accept high values which are usually explained by the existence of dark matter. Due to the primary forces of repulsive nature between all masses the expansion of the universe is an intrinsic property. The balance between primary, repulsive and secondary, attractive gravitational forces can stabilize highly concentrated mass accumulations as they are observed in globular clusters and the bulges of galaxies.

physics.gen-ph↗