BRIGHT STRONGLY LENSED GALAXIES AT REDSHIFTz∼ 6-7 BEHIND THE CLUSTERS ABELL 1703 AND CL0024+16
نویسندگان
چکیده
منابع مشابه
Lensed Galaxies at Redshift z ∼ 6 − 7 behind the Clusters Abell 1703 and CL 0024 + 16 1
We report on the discovery of three bright, strongly-lensed objects behind Abell 1703 and CL0024+16 from a dropout search over 25 square arcminutes of deep NICMOS data, with deep ACS optical coverage. They are undetected in the deep ACS images below 8500 Å and have clear detections in the J and H bands. Fits to the ACS, NICMOS and IRAC data yield robust photometric redshifts in the range z ∼ 6−...
متن کاملKeck spectroscopic survey of strongly lensed galaxies in Abell 1703: further evidence of a relaxed, unimodal cluster
Context. Strong gravitational lensing is a unique tool that can be used to accurately model the inner mass distribution of massive galaxy clusters. In particular, clusters with large Einstein radii provide a wealth of multiply imaged systems in the cluster core. Measuring the redshift of these multiple images provides strong constraints for precisely determining the shape of the central dark ma...
متن کاملDISCOVERY OF A VERY BRIGHT STRONGLY - LENSED GALAXY CANDIDATE AT z ≈ 7
Using Hubble Space Telescope (HST ) and Spitzer IRAC imaging, we report the discovery of a very bright strongly-lensed Lyman break galaxy (LBG) candidate at z ∼ 7.6 in the field of the massive galaxy cluster Abell 1689 (z = 0.18). The galaxy candidate, which we refer to as A1689-zD1, shows a strong z850 − J110 break of at least 2.2 magnitudes. The source is completely undetected (< 1σ) in HST A...
متن کاملThe detection of a population of submillimeter-bright, strongly lensed galaxies.
Gravitational lensing is a powerful astrophysical and cosmological probe and is particularly valuable at submillimeter wavelengths for the study of the statistical and individual properties of dusty star-forming galaxies. However, the identification of gravitational lenses is often time-intensive, involving the sifting of large volumes of imaging or spectroscopic data to find few candidates. We...
متن کاملSpitzer and Hubble Constraints on the Physical Properties of the z ∼ 7 Galaxy Strongly Lensed by Abell 2218
We report the detection of a z ∼ 7 galaxy strongly lensed by the massive galaxy cluster Abell 2218 (z = 0.175) at 3.6 and 4.5 μm using the Spitzer Observatory and at 1.1 μm using the Hubble Space Telescope. The new data indicate a refined photometric redshift in the range of 6.6− 6.8 depending on the presence of Lyα emission. The spectral energy distribution is consistent with having a signific...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/697/2/1907