| Autor: |
Luo, Yifei, Leauthaud, Alexie, Greene, Jenny, Huang, Song, Kado-Fong, Erin, Danieli, Shany, Li, Ting S., Li, Jiaxuan, Blanco, Diana, Wasleske, Erik J., Wick, Joseph, Mintz, Abby, Guan, Runquan, Peter, Annika H. G., Baldassare, Vivienne, Brooks, Alyson, Banerjee, Arka, Bhattacharyya, Joy, Cai, Zheng, Chen, Xinjun, Gunn, Jim, Johnson, Sean D., Kelvin, Lee S., Li, Mingyu, Lin, Xiaojing, Lupton, Robert, Mace, Charlie, Medina, Gustavo E., Read, Justin, Rosado, Rodrigo Cordova, Seifert, Allen |
| Rok vydání: |
2023 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| DOI: |
10.1093/mnras/stae925 |
| Popis: |
The Merian survey is mapping $\sim$ 850 degrees$^2$ of the Hyper Suprime-Cam Strategic Survey Program (HSC-SSP) wide layer with two medium-band filters on the 4-meter Victor M. Blanco telescope at the Cerro Tololo Inter-American Observatory, with the goal of carrying the first high signal-to-noise (S/N) measurements of weak gravitational lensing around dwarf galaxies. This paper presents the design of the Merian filter set: N708 ($\lambda_c = 7080 \unicode{x212B}$, $\Delta\lambda = 275\unicode{x212B}$) and N540 ($\lambda_c = 5400\unicode{x212B}$, $\Delta\lambda = 210\unicode{x212B}$). The central wavelengths and filter widths of N708 and N540 were designed to detect the $\rm H\alpha$ and $\rm [OIII]$ emission lines of galaxies in the mass range $8<\rm \log M_*/M_\odot<9$ by comparing Merian fluxes with HSC broad-band fluxes. Our filter design takes into account the weak lensing S/N and photometric redshift performance. Our simulations predict that Merian will yield a sample of $\sim$ 85,000 star-forming dwarf galaxies with a photometric redshift accuracy of $\sigma_{\Delta z/(1+z)}\sim 0.01$ and an outlier fraction of $\eta=2.8\%$ over the redshift range $0.058Comment: 18 pages, 14 figures, accepted for publication in MNRAS |
| Databáze: |
arXiv |
| Externí odkaz: |
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