Results 31 to 40 of about 4,958 (312)
European Physical Journal C: Particles and Fields, 2022 In this work, we discuss a new method to probe the redshift evolution of the gas depletion factor, i.e. the ratio by which the gas mass fraction of galaxy clusters is depleted with respect to the universal mean of baryon fraction.
R. F. L. Holanda +2 more
doaj +1 more source
The Unexplored Redshift Survey [PDF]
Publications of the Astronomical Society of the Pacific, 2001 Redshift surveys remain an important constraint on cosmological parameters and a key to characterizing the nature and evolution of the large‐scale distribution of galaxies. I discuss redshift surveys as a route to exploration of other issues associated with large‐scale structure including the low surface brightness universe and the links between star ...
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Local Redshift Surveys and Galaxy Evolution [PDF]
, 2006 We present observations of galaxy environmental dependencies using data from the 2dF Galaxy Redshift Survey. From a combined analysis of the luminosity function, Butcher-Oemler effect and trends in H$ $ line strengths we find support for a model where galaxy properties are mainly set by initial conditions at the time of their formation.
De Propris, Roberto +2 more
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PHOTOMETRIC REDSHIFTS FOR QUASARS IN MULTI-BAND SURVEYS [PDF]
The Astrophysical Journal, 2013 MLPQNA stands for Multi Layer Perceptron with Quasi Newton Algorithm and it is a machine learning method which can be used to cope with regression and classification problems on complex and massive data sets. In this paper we give the formal description of the method and present the results of its application to the evaluation of photometric redshifts ...
Brescia M. +4 more
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Simulating Continuum-based Redshift Measurement in the Roman’s High Latitude Spectroscopic Survey
The Astronomical JournalWe investigate the capability of the Nancy Grace Roman Space Telescope’s (Roman) Wide-Field Instrument G150 slitless grism to detect red, quiescent galaxies based on the current reference survey.
Zhiyuan Guo +3 more
doaj +1 more source
Optical Redshift Surveys [PDF]
Highlights of Astronomy, 1992 Redshift surveys of galaxies have been over the past decade the major source of information for studies of the large-scale structure of the Universe. Following the completion of the original CfA Redshift Survey, several groups have joined the endeavor, probing different regions of the sky to different depths in a remarkable long-term effort to study ...
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Advanced Functional Materials, EarlyView.Hollow poly(heptazine imide) spheres are prepared through a novel approach that integrates hard templating with ionothermal synthesis. This method enables precise control over surface area, pore volume, hydrophilicity, light absorption, band position, and metal composition. These tunable properties facilitate the customized design of semiconductors for
Lingli Ni +10 more
wiley +1 more source
Archetype-based Redshift Estimation for the Dark Energy Spectroscopic Instrument Survey
The Astronomical JournalWe present a computationally efficient galaxy archetype-based redshift estimation and spectral classification method for the Dark Energy Survey Instrument (DESI) survey.
Abhijeet Anand +48 more
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The Astrophysical Journal, 2023 Euclid and the Roman Space Telescope (Roman) will soon use grism spectroscopy to detect millions of galaxies via their H α and [O iii ] λ 5007 emission. To better constrain the expected galaxy counts from these instruments, we use a vetted sample of 4239
Gautam Nagaraj +4 more
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Advanced Functional Materials, EarlyView.This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger +10 more
wiley +1 more source