Academic Journal
Preprint typeset using L ATEX style emulateapj v. 11/26/03 MEASURING THE THREE-DIMENSIONAL STRUCTURE OF GALAXY CLUSTERS. I. APPLICATION TO A
| العنوان: | Preprint typeset using L ATEX style emulateapj v. 11/26/03 MEASURING THE THREE-DIMENSIONAL STRUCTURE OF GALAXY CLUSTERS. I. APPLICATION TO A |
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| المؤلفون: | Sample Of Clusters, Mauro Sereno, Mark W. Bautz |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/astro-ph/0502153v1.pdf. |
| سنة النشر: | 2008 |
| المجموعة: | CiteSeerX |
| الوصف: | We discuss a method to constrain the intrinsic shapes of galaxy clusters by combining X-Ray and Sunyaev-Zeldovich observations. The method is applied to a sample of 25 X-Ray selected clusters, with measured Sunyaev-Zeldovich temperature decrements. The sample turns out to be slightly biased, with strongly elongated clusters preferentially aligned along the line of sight. This result demonstrates that X-Ray selected cluster samples may be affected by morphological and orientation effects even if a relatively high threshold signal-to-noise ratio is used to select the sample. A large majority of the clusters in our sample exhibit a marked triaxial structure; the spherical hypothesis is strongly rejected for most sample members. Cooling flow clusters do not show preferentially regular morphologies. We also show that identification of multiple gravitationally-lensed images, together with measurements of the Sunyaev-Zeldovich effect and X-Ray surface brightness, can provide a simultaneous determination of the three-dimensional structure of a cluster, of the Hubble constant, and the cosmological energy density parameters. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.389; http://arxiv.org/pdf/astro-ph/0502153v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.389 http://arxiv.org/pdf/astro-ph/0502153v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.BAC82370 |
| قاعدة البيانات: | BASE |
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