The Morphological Butcher-Oemler effect in the SDSS Cut&Enhance Galaxy Cluster Catalog
We investigate the evolution of the fractions of late type cluster galaxies as a function of redshift, using one of the largest, most uniform cluster samples available. The sample consists of 514 clusters of galaxies in the range 0.02
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| creator | Goto, Tomotsugu Okamura, Sadanori Yagi, Masafumi Sheth, Ravi K Bahcall, Neta A Zabel, Shane A Crouch, Michael S Annis, James Bernardi, Mariangela Shang-Shan, Chong Gomez, Percy L Hansen, Sarah Kim, Rita S J Knudson, Adam Mckay, Timothy A Miller, Christopher J Sekiguchi, Maki |
| description | We investigate the evolution of the fractions of late type cluster galaxies as a function of redshift, using one of the largest, most uniform cluster samples available. The sample consists of 514 clusters of galaxies in the range 0.02 |
| doi_str_mv | 10.48550/arxiv.0301302 |
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The sample consists of 514 clusters of galaxies in the range 0.02<z<0.3 from the Sloan Digital Sky Survey Cut & Enhance galaxy cluster catalog. This catalog was created using a single automated cluster finding algorithm on uniform data from a single telescope, with accurate CCD photometry, thus, minimizing selection biases. We use four independent methods to analyze the evolution of the late type galaxy fraction. Specifically, we select late type galaxies based on: restframe g-r color, u-r color, galaxy profile fitting and concentration index. The first criterion corresponds to the one used in the classical Butcher-Oemler analyses. The last three criteria are more sensitive to the morphological type of the galaxies. In all four cases, we find an increase in the fraction of late type galaxies with increasing redshift, significant at the 99.9% level. The results confirm that cluster galaxies do change colors with redshift (the Butcher-Oemler effect) and, in addition, they change their morphology to later-type toward higher redshift -- indicating a morphological equivalent of the Butcher-Oemler effect. We also find a tendency of richer clusters to have lower fractions of late type galaxies. The trend is consistent with a ram pressure stripping model, where richer clusters have more effective ram pressure due to their higher temperature.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.0301302</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Algorithms ; Color ; Galactic clusters ; Galactic evolution ; Galaxies ; Morphology ; Photometry ; Ram pressure ; Red shift ; Sky surveys (astronomy) ; Stars & galaxies</subject><ispartof>arXiv.org, 2003-06</ispartof><rights>2003. 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The results confirm that cluster galaxies do change colors with redshift (the Butcher-Oemler effect) and, in addition, they change their morphology to later-type toward higher redshift -- indicating a morphological equivalent of the Butcher-Oemler effect. We also find a tendency of richer clusters to have lower fractions of late type galaxies. 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| subjects | Algorithms Color Galactic clusters Galactic evolution Galaxies Morphology Photometry Ram pressure Red shift Sky surveys (astronomy) Stars & galaxies |
| title | The Morphological Butcher-Oemler effect in the SDSS Cut&Enhance Galaxy Cluster Catalog |
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