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17 years 10 months ago #18579
by cosmicsurfer
Replied by cosmicsurfer on topic Reply from John Rickey
COULD THE "GREAT ATTRACTOR" ACTUALLY BE THE ROTATIONAL DIRECTION OF MOTION OF GREATER UNIVERSE [1.4 MILLION MPH]?
"Astronomers have long known that the Milky Way is moving toward the constellation Centaurus at a speed of 1.4 million mph, but the reason for the movement remained a topic of debate. Over 20 years ago, it was suggested that the motion was due to the gravitational pull of a nearby large concentration of matter dubbed the Great Attractor. The Great Attractor is what is known as a supercluster, that is, a group of clusters of galaxies, and was estimated to contain matter equal to more than over 10 million billion times the mass of the sun.
Until now, efforts to find the Great Attractor were hampered by its location in the "zone of avoidance," an area behind the plane of the Milky Way where gas and dust within our galaxy block much of the visible light from objects outside it. The new survey, Clusters in the Zone of Avoidance (CIZA), is the first to search for the X-ray signatures of galaxy clusters behind the Milky Way and investigate the nature of the Great Attractor. Due to the difficulty of observing through the Milky Way, this region was the final portion of the sky in which the cluster population had yet to be mapped.
"X-rays can penetrate even regions that are extremely obscured by gas and dust, and galaxy clusters are sources of X-rays. This is what prompted us to attempt to map the distribution of galaxy clusters behind the plane of the Milky Way using X-ray observations," explains Ebeling, who initiated the survey in 1998.
Kocevski and collaborators report finding far fewer massive cluster systems near the Great Attractor than would be expected given the region's proposed mass. "One of our goals was to uncover the true mass of the Great Attractor. What we found is that it is not that great after all," says Kocevski. Instead, the CIZA team identified a significant concentration of galaxies behind the Great Attractor, near the Shapley Supercluster, which lies 500 million light-years away or four times the distance to the Great Attractor region. The Shapley Supercluster, first identified in 1930 by Harlow Shapley, is the most massive association of galaxies out of the 220 identified superclusters in the observable Universe. It contains the equivalent of nearly 10,000 Milky Ways, or four times the amount of mass currently observed in the Great Attractor region.
With the galaxy cluster population mapped over the entire sky for the first time, Kocevski analyzed how all the clusters surrounding the Milky Way would affect it and found that only 44% of our galaxy's motion through space is due to the gravitational pull of galaxies in the nearby Great Attractor region. The remaining portion is the result of a large-scale flow in which much of the local Universe, including perhaps the Great Attractor itself, is being pulled toward the Shapley Supercluster.
The results confirm previous work, which suggested the Milky Way's motion was influenced by structures more distant than the Great Attractor, but this study is the first to reach this conclusion after having fully mapped the Great Attractor and regions behind it.
The finding resolves one of the long-standing problems associated with the Great Attractor. The presence of a massive overdensity relatively close to the Milky Way suggested that extreme mass concentrations such as the Great Attractor were fairly common in the Universe. This implied that the Universe contained much more matter than was measured by other means such as supernova Ia observations. The finding of a less massive Great Attractor and the large distance to the Shapley supercluster implies that extremely massive overdensities are rare in the Universe, which brings the suggested density of the Universe in line with the density established by independent means."
www.hawaii.edu/cgi-bin/uhnews?20060111091754
"A search is reported for X-ray emission associated with the object, dubbed the 'great attractor', which has been postulated as the cause of the coherent deviations from the Hubble flow which are observed in nearby parts of the universe. The hypothesis that a substantial fraction of the dynamical mass of the great attractor exists in the form of rich clusters of galaxies is ruled out."
www.journals.uchicago.edu/cgi-bin/resolve?id=doi:10.1086/168046
A diviation in the proposed expansion of universe towards the attractor certainly could be an indication of rotational directions of forward motion of universe; rather then deviation of expansion caused by dark matter or gravitational attraction. The x-ray map certainly looks like a focal point towards an infinity. Here is the map:
The visible universe appears to contain an even distribution of mass in smooth flat flowing structures forming "Fingers of God", large chains of "Super Clusters", and all in motion. Where does the energy come from to create mass, gravitational forces, and motion? A big bang or a dual motion steady state universe? My guess is a steady state universe especially if we find that there is in fact a direction of motion of visible universe.
John
"Astronomers have long known that the Milky Way is moving toward the constellation Centaurus at a speed of 1.4 million mph, but the reason for the movement remained a topic of debate. Over 20 years ago, it was suggested that the motion was due to the gravitational pull of a nearby large concentration of matter dubbed the Great Attractor. The Great Attractor is what is known as a supercluster, that is, a group of clusters of galaxies, and was estimated to contain matter equal to more than over 10 million billion times the mass of the sun.
Until now, efforts to find the Great Attractor were hampered by its location in the "zone of avoidance," an area behind the plane of the Milky Way where gas and dust within our galaxy block much of the visible light from objects outside it. The new survey, Clusters in the Zone of Avoidance (CIZA), is the first to search for the X-ray signatures of galaxy clusters behind the Milky Way and investigate the nature of the Great Attractor. Due to the difficulty of observing through the Milky Way, this region was the final portion of the sky in which the cluster population had yet to be mapped.
"X-rays can penetrate even regions that are extremely obscured by gas and dust, and galaxy clusters are sources of X-rays. This is what prompted us to attempt to map the distribution of galaxy clusters behind the plane of the Milky Way using X-ray observations," explains Ebeling, who initiated the survey in 1998.
Kocevski and collaborators report finding far fewer massive cluster systems near the Great Attractor than would be expected given the region's proposed mass. "One of our goals was to uncover the true mass of the Great Attractor. What we found is that it is not that great after all," says Kocevski. Instead, the CIZA team identified a significant concentration of galaxies behind the Great Attractor, near the Shapley Supercluster, which lies 500 million light-years away or four times the distance to the Great Attractor region. The Shapley Supercluster, first identified in 1930 by Harlow Shapley, is the most massive association of galaxies out of the 220 identified superclusters in the observable Universe. It contains the equivalent of nearly 10,000 Milky Ways, or four times the amount of mass currently observed in the Great Attractor region.
With the galaxy cluster population mapped over the entire sky for the first time, Kocevski analyzed how all the clusters surrounding the Milky Way would affect it and found that only 44% of our galaxy's motion through space is due to the gravitational pull of galaxies in the nearby Great Attractor region. The remaining portion is the result of a large-scale flow in which much of the local Universe, including perhaps the Great Attractor itself, is being pulled toward the Shapley Supercluster.
The results confirm previous work, which suggested the Milky Way's motion was influenced by structures more distant than the Great Attractor, but this study is the first to reach this conclusion after having fully mapped the Great Attractor and regions behind it.
The finding resolves one of the long-standing problems associated with the Great Attractor. The presence of a massive overdensity relatively close to the Milky Way suggested that extreme mass concentrations such as the Great Attractor were fairly common in the Universe. This implied that the Universe contained much more matter than was measured by other means such as supernova Ia observations. The finding of a less massive Great Attractor and the large distance to the Shapley supercluster implies that extremely massive overdensities are rare in the Universe, which brings the suggested density of the Universe in line with the density established by independent means."
www.hawaii.edu/cgi-bin/uhnews?20060111091754
"A search is reported for X-ray emission associated with the object, dubbed the 'great attractor', which has been postulated as the cause of the coherent deviations from the Hubble flow which are observed in nearby parts of the universe. The hypothesis that a substantial fraction of the dynamical mass of the great attractor exists in the form of rich clusters of galaxies is ruled out."
www.journals.uchicago.edu/cgi-bin/resolve?id=doi:10.1086/168046
A diviation in the proposed expansion of universe towards the attractor certainly could be an indication of rotational directions of forward motion of universe; rather then deviation of expansion caused by dark matter or gravitational attraction. The x-ray map certainly looks like a focal point towards an infinity. Here is the map:
The visible universe appears to contain an even distribution of mass in smooth flat flowing structures forming "Fingers of God", large chains of "Super Clusters", and all in motion. Where does the energy come from to create mass, gravitational forces, and motion? A big bang or a dual motion steady state universe? My guess is a steady state universe especially if we find that there is in fact a direction of motion of visible universe.
John
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