Results 71 to 80 of about 4,302,843 (380)
High-redshift QSOs in the FIRST survey [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 7 pages, including 5 ...
Benn C.R. +6 more
openaire +3 more sources
Tracing the sound horizon scale with photometric redshift surveys [PDF]
, 2010 We propose a new method for the extraction cosmological parameters using the baryon acoustic oscillation (BAO) scale as a standard ruler in deep galaxy surveys with photometric determination of redshifts.
E. Sánchez +9 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We present the first comprehensive release of photometric redshifts (photo - z 's) from the Cosmic Assembly Near-Infrared Deep Extragalactic Legacy Survey (CANDELS) team.
Dritan Kodra +29 more
doaj +1 more source
The Inverse Redshift-Space Operator: Reconstructing Cosmological Density and Velocity Fields [PDF]
, 1999 We present the linear inverse redshift space operator which maps the galaxy density field derived from redshift surveys from redshift space to real space. Expressions are presented for observers in both the CMBR and Local Group rest frames.
Andy Taylor +32 more
core +2 more sources
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 ...
openaire +1 more source
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
openaire +2 more sources
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
openaire +8 more sources
Correcting for Interloper Contamination in the Power Spectrum with Neural Networks
The Astrophysical JournalModern slitless spectroscopic surveys such as Euclid and Roman collect vast numbers of galaxy spectra, but their low signal-to-noise ratios often lead to incorrect redshift assignments when relying on a single emission line.
Marina S. Cagliari +2 more
doaj +1 more source
Peering into the Cosmic Dawn: JWST Cycle 1 Data Reveals Early Galaxy Candidates at Redshifts z > 9.5
Edinburgh Student Journal of ScienceObserving high-redshift objects provides a window into the past, enabling insight into galaxy formation, matter distribution, and the nature of dark matter and energy.
Sev Zielinska
doaj +1 more source
JEMS: A Deep Medium-band Imaging Survey in the Hubble Ultra Deep Field with JWST NIRCam and NIRISS
The Astrophysical Journal Supplement Series, 2023 We present JWST Extragalactic Medium-band Survey, the first public medium-band imaging survey carried out using JWST/NIRCam and NIRISS. These observations use ∼2 and ∼4 μ m medium-band filters (NIRCam F182M, F210M, F430M, F460M, F480M; and NIRISS F430M ...
Christina C. Williams +34 more
doaj +1 more source