2022-06-07 マサチューセッツ大学アマースト校
Some of the dozens of galaxies caught by Hubble’s newest image. Credit: Mowla et al., 10.17909/srcz-2b67
この画像は、ハッブル宇宙望遠鏡の撮像速度を 8 倍にしたものです。この浅いながらも深いイメージは、最近『アストロフィジカル・ジャーナル』誌に発表され、天文学者がモンスター銀河、活動銀河核、合体寸前の銀河など、宇宙で最も明るいが最も稀な事象を研究するのに役立つと期待されているのです。
＜関連情報＞
- https://www.umass.edu/news/article/how-umass-astronomers-helped-hubble-space-telescope-take-widest-photo-universe-ever
- https://arxiv.org/abs/2206.01156
3D-DASH：ハッブル宇宙望遠鏡による近赤外線広域サーベイ
3D-DASH: The Widest Near-Infrared Hubble Space Telescope Survey
Lamiya A. Mowla, Sam E. Cutler, Gabriel B. Brammer, Ivelina G. Momcheva, Katherine E. Whitaker, Pieter G. van Dokkum, Rachel S. Bezanson, Natascha M. Forster Schreiber, Marijn Franx, Kartheik G. Iyer, Danilo Marchesini, Adam Muzzin, Erica J. Nelson, Rosalind E. Skelton, Gregory F. Snyder, David A. Wake, Stijn Wuyts, Arjen van der Wel
The Astrophysical Journal Submitted: 2 Jun 2022
DOI:https://doi.org/10.48550/arXiv.2206.01156
The 3D-Drift And SHift (3D-DASH) program is a \textit{Hubble Space Telescope} WFC3 F160W imaging and G141 grism survey of the equatorial COSMOS field. 3D-DASH extends the legacy of HST near-infrared imaging and spectroscopy to degree-scale swaths of the sky, enabling the identification and study of distant galaxies (z>2) that are rare or in short-lived phases of galaxy evolution at rest-frame optical wavelengths. Furthermore, when combined with existing ACS/F814W imaging, the program facilitates spatially-resolved studies of the stellar populations and dust content of intermediate-redshift (0.5<z<2) galaxies. Here we present the reduced F160W imaging mosaic available to the community. Observed with the efficient DASH technique, the mosaic comprises 1256 individual WFC3 pointings, corresponding to an area of 1.35 deg^22 (1.43 deg^22 in 1912 when including archival data). The median 5σ point-source limit in H160 is 24.74 mag. We also provide tools to determine the local point spread function (PSF), create cutouts, and explore the image at any location within the 3D-DASH footprint. 3D-DASH is the widest \textit{HST}/WFC3 imaging survey in the F160W filter to date, increasing the existing extragalactic survey area in the near-infrared at HST resolution by an order of magnitude.
