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pro vyhledávání: '"Koester, Benjamin"'
Akademický článek
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Autor:
Sharon, Keren, Bayliss, Matthew B., Dahle, Håkon, Dunham, Samuel J., Florian, Michael K., Gladders, Michael D., Johnson, Traci L., Mahler, Guillaume, Paterno-Mahler, Rachel, Rigby, Jane R., Whitaker, Katherine E., Akhshik, Mohammad, Koester, Benjamin P., Murray, Katherine, Wuyts, Eva
We present strong gravitational lensing models for 37 galaxy clusters from the SDSS Giant Arcs Survey. We combine data from multi-band Hubble Space Telescope WFC3imaging, with ground-based imaging and spectroscopy from Magellan, Gemini, APO, and MMT,
Externí odkaz:
http://arxiv.org/abs/1904.05940
Grades provide students with their primary performance feedback: signals which affect academic choices. Variations in grading practice among courses impose grade penalties (and bonuses) on students who take them. These grade penalties are sometimes g
Externí odkaz:
http://arxiv.org/abs/1608.07565
Akademický článek
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Autor:
Gladders, Michael D., Rigby, Jane R., Sharon, Keren, Wuyts, Eva, Abramson, Louis E., Dahle, Hakon, Persson, S. E., Monson, Andrew J., Kelson, Daniel D., Benford, Dominic J., Murphy, David, Bayliss, Matthew B., Finkelstein, Keely D., Koester, Benjamin P., Bans, Alissa, Baxter, Eric J., Helsby, Jennifer E.
We present the discovery and a detailed multi-wavelength study of a strongly-lensed luminous infrared galaxy at z=0.816. Unlike most known lensed galaxies discovered at optical or near-infrared wavelengths this lensed source is red, r-Ks = 3.9 [AB],
Externí odkaz:
http://arxiv.org/abs/1202.5269
Autor:
Sharon, Keren, Gladders, Michael D., Rigby, Jane R., Wuyts, Eva, Koester, Benjamin P., Bayliss, Matthew B., Barrientos, L. Felipe
We present new HST/WFC3 imaging data of RCSGA 032727-132609, a bright lensed galaxy at z=1.7 that is magnified and stretched by the lensing cluster RCS2 032727-132623. Using this new high-resolution imaging, we modify our previous lens model (which w
Externí odkaz:
http://arxiv.org/abs/1202.0539
Autor:
Miller, Eric D., Rykoff, Eli, Dupke, Renato, de Oliveira, Claudia Mendes, de Oliveira, Raimundo Lopes, Proctor, Robert, Garmire, Gordon, Koester, Benjamin, McKay, Timothy
We report the discovery of 12 new fossil groups of galaxies, systems dominated by a single giant elliptical galaxy and cluster-scale gravitational potential, but lacking the population of bright galaxies typically seen in galaxy clusters. These fossi
Externí odkaz:
http://arxiv.org/abs/1109.4167
Autor:
Oguri, Masamune, Bayliss, Matthew B., Dahle, Haakon, Sharon, Keren, Gladders, Michael D., Natarajan, Priyamvada, Hennawi, Joseph F., Koester, Benjamin P.
Publikováno v:
Mon.Not.Roy.Astron.Soc.420:3213-3239,2012
We study the mass distribution of a sample of 28 galaxy clusters using strong and weak lensing observations. The clusters are selected via their strong lensing properties as part of the Sloan Giant Arcs Survey (SGAS) from the Sloan Digital Sky Survey
Externí odkaz:
http://arxiv.org/abs/1109.2594
Autor:
Rozo, Eduardo, Rykoff, Eli, Koester, Benjamin, Nord, Brian, Wu, Hao-Yi, Evrard, August, Wechsler, Risa
Publikováno v:
Astrophys.J.740:53,2011
Maximizing the utility of upcoming photometric cluster surveys requires a thorough understanding of the richness-mass relation of galaxy clusters. We use Monte Carlo simulations to study the impact of various sources of observational scatter on this
Externí odkaz:
http://arxiv.org/abs/1104.2090
Autor:
Tinker, Jeremy L., Sheldon, Erin S., Wechsler, Risa H., Becker, Matthew R., Rozo, Eduardo, Zu, Ying, Weinberg, David H., Zehavi, Idit, Blanton, Michael, Busha, Michael, Koester, Benjamin P.
We place constraints on the average density (Omega_m) and clustering amplitude (sigma_8) of matter using a combination of two measurements from the Sloan Digital Sky Survey: the galaxy two-point correlation function, w_p, and the mass-to-galaxy-numbe
Externí odkaz:
http://arxiv.org/abs/1104.1635