Results 1 to 10 of about 47,826 (245)
ESTIMATING PHOTOMETRIC REDSHIFTS OF QUASARS VIA THEk-NEAREST NEIGHBOR APPROACH BASED ON LARGE SURVEY DATABASES [PDF]
, 2013 We apply one of lazy learning methods named k-nearest neighbor algorithm (kNN) to estimate the photometric redshifts of quasars, based on various datasets from the Sloan Digital Sky Survey (SDSS), UKIRT Infrared Deep Sky Survey (UKIDSS) and Wide-field ...
Yanxia Zhang +4 more
openalex +3 more sources
Transparent Ceramic@Sapphire Composites for High-Power Laser-Driven Lighting. [PDF]
Adv Sci (Weinh)This work introduces an innovative strategy for high‐power laser lighting by integrating a phosphor ceramic layer with a high‐thermal‐conductivity sapphire substrate through a simple high‐temperature sintering process. This approach enhances luminous flux (152–319%) and increases the luminescence saturation threshold (100–233%), making it versatile ...
Xi G +11 more
europepmc +2 more sources
The Astrophysical Journal LettersWe present a new analytical model for the attenuation to Epoch of Reionization (EoR) galaxies by proximate neutral hydrogen gas. Many galaxy spectra in the EoR taken by JWST have shown a flux deficit at wavelengths just redward of the Lyman break, and ...
Yoshihisa Asada +14 more
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Spectral Templates Optimal for Selecting Galaxies at z > 8 with the JWST
The Astrophysical Journal, 2023 The selection of high-redshift galaxies often involves spectral energy distribution (SED) fitting to photometric data, an expectation for contamination levels, and measurement of sample completeness—all vetted through comparison to spectroscopic redshift
Rebecca L. Larson +11 more
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Photo-zSNthesis: Converting Type Ia Supernova Lightcurves to Redshift Estimates via Deep Learning
The Astrophysical Journal, 2023 Upcoming photometric surveys will discover tens of thousands of Type Ia supernovae (SNe Ia), vastly outpacing the capacity of our spectroscopic resources.
Helen Qu, Masao Sako
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HectoMAP: The Complete Redshift Survey (Data Release 2)
The Astrophysical Journal, 2023 HectoMAP is a dense redshift survey of 95,403 galaxies based primarily on MMT spectroscopy with a median redshift z = 0.345. The survey covers 54.64 deg ^2 in a 1.°5 wide strip across the northern sky centered at a decl. of 43.°25. We report the redshift,
Jubee Sohn +5 more
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The Astrophysical Journal, 2023 Large imaging surveys, such as the Legacy Survey of Space and Time, rely on photometric redshifts and tomographic binning for 3 × 2 pt analyses that combine galaxy clustering and weak lensing.
Irene Moskowitz +6 more
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Hierarchical Bayesian inference of galaxy redshift distributions from photometric surveys [PDF]
, 2016 Accurately characterizing the redshift distributions of galaxies is essential for analysing deep photometric surveys and testing cosmological models.
Leistedt, Boris +2 more
core +2 more sources
A Catalog of Photometric Redshift and the Distribution of Broad Galaxy Morphologies
Galaxies, 2018 We created a catalog of photometric redshift of ∼3,000,000 SDSS galaxies annotated by their broad morphology. The photometric redshift was optimized by testing and comparing several pattern recognition algorithms and variable selection strategies, and ...
Nicholas Paul +2 more
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The Astrophysical Journal Supplement Series, 2023 The recent UNCOVER survey with the James Webb Space Telescope (JWST) exploits the nearby cluster A2744 to create the deepest view of our Universe to date by leveraging strong gravitational lensing.
Bingjie Wang +43 more
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