LAUSR

Deep learning approach for classifying, detecting and predicting photometric redshifts of quasars in the Sloan Digital Sky Survey Stripe 82

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1 Published in 2018 at "Astronomy and Astrophysics"

DOI: 10.1051/0004-6361/201731106

Abstract: We have applied a convolutional neural network (CNN) to classify and detect quasars in the Sloan Digital Sky Survey Stripe 82 and also to predict the photometric redshifts of quasars. The network takes the variability… read more here.

Keywords: sky survey; sloan digital; survey; redshifts quasars ... See more keywords

Structural and stellar-population properties versus bulge types in Sloan Digital Sky Survey central galaxies

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0 Published in 2020 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/staa328

Abstract: This paper studies pseudo-bulges (P-bulges) and classical bulges (C-bulges) in Sloan Digital Sky Survey (SDSS) central galaxies using the new bulge indicator ΔΣ1, which measures relative central stellar-mass surface density within 1 kpc. We compare ΔΣ1… read more here.

Keywords: density; central galaxies; digital sky; stellar population ... See more keywords

New candidates to polar-ring galaxies from the Sloan Digital Sky Survey

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1 Published in 2018 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/sty3209

Abstract: Polar-ring galaxies (PRGs) are fascinating systems in which the central object (typically, an early-type galaxy) is encircled by a large-scale ring of stars, gas, and dust with almost perpendicular spin. PRGs are rare objects and… read more here.

Keywords: sky survey; sloan digital; digital sky; polar ring ... See more keywords

The Sloan Digital Sky Survey extended point spread functions

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1 Published in 2019 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/stz3111

Abstract: A robust and extended characterization of the point spread function (PSF) is crucial to extract the photometric information produced by deep imaging surveys. Here, we present the extended PSFs of the Sloan Digital Sky Survey… read more here.

Keywords: sky survey; sloan digital; survey; digital sky ... See more keywords

Fuzzy and SVM Based Classification Model to Classify Spectral Objects in Sloan Digital Sky

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2 Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2022.3207480

Abstract: The Sloan Digital Sky Survey (SDSS) comprises about one billion objects classified spectrometrically. Because astronomical datasets are so enormous, manually classifying them is nearly impossible—a huge dataset results in class imbalance and overfitting. We recommend… read more here.

Keywords: svm based; sloan digital; model; fuzzy svm ... See more keywords