Imaging Simulations of the Sunyaev-Zel'dovich Effect for ALMA
| Autor: | Yamada, K., Kitayama, T., Takakuwa, S., Iono, D., Tsutsumi, T., Kohno, K., Takizawa, M., Yoshikawa, K., Akahori, T., Komatsu, E., Suto, Y., Matsuo, H., Kawabe, R. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1093/pasj/64.5.102 |
| Popis: | We present imaging simulations of the Sunyaev-Zel'dovich effect of galaxy clusters for the Atacama Large Millimeter/submillimeter Array (ALMA) including the Atacama Compact Array (ACA). In its most compact configuration at 90GHz, ALMA will resolve the intracluster medium with an effective angular resolution of 5 arcsec. It will provide a unique probe of shock fronts and relativistic electrons produced during cluster mergers at high redshifts, that are hard to spatially resolve by current and near-future X-ray detectors. Quality of image reconstruction is poor with the 12m array alone but improved significantly by adding ACA; expected sensitivity of the 12m array based on the thermal noise is not valid for the Sunyaev-Zel'dovich effect mapping unless accompanied by an ACA observation of at least equal duration. The observations above 100 GHz will become excessively time-consuming owing to the narrower beam size and the higher system temperature. On the other hand, significant improvement of the observing efficiency is expected once Band 1 is implemented in the future. Comment: 16 pages, 12 figures. Accepted for publication in PASJ. Note added in proof is included |
| Databáze: | arXiv |
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