A2111: a Z= 0. 23 Butcher-Oemler Cluster with a Non-Isothermal Atmosphere and Normal Metallicity

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ISBN 13 : 9781725059511
Total Pages : 34 pages
Book Rating : 4.0/5 (595 download)

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Book Synopsis A2111: a Z= 0. 23 Butcher-Oemler Cluster with a Non-Isothermal Atmosphere and Normal Metallicity by : National Aeronautics and Space Administration (NASA)

Download or read book A2111: a Z= 0. 23 Butcher-Oemler Cluster with a Non-Isothermal Atmosphere and Normal Metallicity written by National Aeronautics and Space Administration (NASA) and published by . This book was released on 2018-08-10 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report results from an x-ray spectral study of the z=0.23 Abell 2111 galaxy cluster using the Advanced Satellite for Astrophysics and Cosmology and the ROSAT Position Sensitive Proportional Counter. By correcting for the energy-dependent point-spread function of the instruments, we have examined the temperature structure of the cluster. The cluster's core within 3 is found to have a temperature of 5.4 +/- 0.5 keV, significantly higher than 2.8 +/-0.7 keV in the surrounding region of r = 3-6. This radially decreasing temperature structure can be parameterized by a polytropic index of gamma less than 1.4. Furthermore, the intracluster medium appears clumpy on scales less than 1. Early studies have revealed that the x-ray centroid of the cluster shifts with spatial scale and the overall optical and x-ray morphology is strongly elongated. These results together suggest that A2111 in undergoing a merger, which is likely responsible for the high fraction of blue galaxies observed in the cluster. We have further measured the abundance of the medium as 0.25 +/- 0.14 solar. This value is similar to those of nearby clusters which do not show a large blue galaxy function, suggesting that star formation in disk galaxies and subsequent loss to the intracluster medium do not drastically alter the average abundance of a cluster since z=0.23. Wang, Q. Daniel and Henriksen, Mark Goddard Space Flight Center NASA/CR-1998-208604, NAS 1.26:208604 NASA Order S-92508-F; NAG5-6413; NSF AST-96-24716...

Making Sense of Census 2000

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ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (319 download)

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Download or read book Making Sense of Census 2000 written by and published by . This book was released on 1999 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Of Interest to Visitors

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ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (319 download)

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Download or read book Of Interest to Visitors written by and published by . This book was released on 1999 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

U.S. Government Subscriptions

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ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis U.S. Government Subscriptions by :

Download or read book U.S. Government Subscriptions written by and published by . This book was released on 2003 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Senate Treaty Documents

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Publisher : Government Printing Office
ISBN 13 :
Total Pages : 1028 pages
Book Rating : 4./5 ( download)

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Book Synopsis Senate Treaty Documents by :

Download or read book Senate Treaty Documents written by and published by Government Printing Office. This book was released on 1986 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Trails--Wayne National Forest

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ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (319 download)

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Download or read book Trails--Wayne National Forest written by and published by . This book was released on 1999 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Creep and Creep-rupture Behavior of Wood-based Structural Panels

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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Creep and Creep-rupture Behavior of Wood-based Structural Panels by : Theodore Laufenberg

Download or read book Creep and Creep-rupture Behavior of Wood-based Structural Panels written by Theodore Laufenberg and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper summarizes a cooperative research program between the USDA Forest Service, Forest Products Laboratory (FPL), in Madison, Wisconsin, and Forintek Canada Corp. in Vancouver, British Columbia, Canada. This research program provided detailed creep--rupture and some creep information for composite panel products. Commercially produced plywood, oriented strandboard (OSB), and minimally aligned waferboard were tested to identify nine mills (three for each product) that produced panels with a range of flexural creep performance. The three plywood, three OSB, and three waferboard products (nine products total, one from each mill) were then tested to provide information on their duration of load (DOL) and creep performance. Large panel specimens were subjected to both rampload and constant-load tests under one environmental condition. The constant-load results provided conventional or deterministic DOL factors that compared favorably with National Design Specifications recommended for adjusting lumber design strength properties under dry service conditions. Ramp-load specimen data generally indicated a lower rate of damage accumulation than did data for constant-load specimens. Creep tests at two low constant-load levels were also performed on large specimens under three environmental conditions for a 6-month period. Those results suggested that present deterministic creep factors in panel design practice might be acceptable for plywood under the influence of relatively severe conditions, for OSB in moderate conditions, and for waferboard in dry service environmental conditions.

Granular Herbicide Applicator

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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Granular Herbicide Applicator by : Dave Gasvoda

Download or read book Granular Herbicide Applicator written by Dave Gasvoda and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Old-growth Definition for Dry and Dry-mesic Oak-pine Forests

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ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis An Old-growth Definition for Dry and Dry-mesic Oak-pine Forests by : David L. White

Download or read book An Old-growth Definition for Dry and Dry-mesic Oak-pine Forests written by David L. White and published by . This book was released on 1998 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: