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Related papers: J-PLUS: Morphological star/galaxy classification b…

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We have found the u -r color versus g -i color gradient space can be used for highly successful morphology classification of galaxies in the Sloan Digital Sky Survey. In this space galaxies form early and late type branches well-separated…

Astrophysics · Physics 2009-11-13 Changbom Park , Yun-Young Choi

We present a quantitative method to classify galaxies, based on multi-wavelength data and elaborated from the properties of nearby galaxies. Our objective is to define an evolutionary method that can be used for low and high redshift…

Astrophysics · Physics 2017-03-29 Sebastien Lauger , Denis Burgarella , Veronique Buat

Context. The Javalambre Photometric Local Universe Survey (J-PLUS) has obtained precise photometry in twelve specially designed filters for large numbers of Galactic stars. Deriving their precise stellar atmospheric parameters and…

We investigate the photometric properties of 456 bright galaxies using imaging data recorded during the commissioning phase of the Sloan Digital Sky Survey (SDSS). Morphological classification is carried out by correlating results of…

Astrophysics · Physics 2009-07-09 K. Shimasaku , M. Fukugita , M. Doi , M. Hamabe , T. Ichikawa , S. Okamura , M. Sekiguchi , N. Yasuda

We present a strong lensing system in which a double source is imaged 5 times by 2 early-type galaxies. We take advantage in this target of the multi-band photometry obtained as part of the CLASH program, complemented by the spectroscopic…

The two-step galaxy morphology classification framework {\tt USmorph} successfully combines unsupervised machine learning (UML) with supervised machine learning (SML) methods. To enhance the UML step, we employed a dual-encoder architecture…

Astrophysics of Galaxies · Physics 2025-12-22 Xiaolei Yin , Guanwen Fang , Shiying Lu , Zesen Lin , Yao Dai , Chichun Zhou

(Abridged) We determine the quantitative morphology and star formation properties of galaxies in six nearby X-ray detected, poor groups using multi-object spectroscopy and wide-field R imaging. We measure structural parameters for each…

Astrophysics · Physics 2009-10-31 Kim-Vy H. Tran , Luc Simard , Ann I. Zabludoff , John S. Mulchaey

Star-galaxy classification is one of the most fundamental data-processing tasks in survey astronomy, and a critical starting point for the scientific exploitation of survey data. For bright sources this classification can be done with…

Instrumentation and Methods for Astrophysics · Physics 2013-07-30 Marc Henrion , Daniel J. Mortlock , David J. Hand , Axel Gandy

The interstellar medium is highly structured, presenting a range of morphologies across spatial scales. The large data sets resulting from observational surveys and state-of-the-art simulations studying these hierarchical structures means…

Astrophysics of Galaxies · Physics 2022-08-31 Seamus D. Clarke , Sarah E. Jaffa , Anthony P. Whitworth

Galaxy morphologies provide valuable insights into their formation processes, tracing the spatial distribution of ongoing star formation and encoding signatures of dynamical interactions. While such information has been extensively…

We present a novel multimodal neural network (MNN) for classifying astronomical sources in multiband ground-based observations, from optical to near infrared, to separate sources in stars, galaxies and quasars. Our approach combines a…

We introduce J-HERTz (J-PLUS Heritage Exploration of Radio Targets at $z < 5$), a new multi-wavelength catalog that combines optical narrow-band photometry from J-PLUS, infrared observations from WISE, and deep low-frequency radio data from…

We provide fits to the distribution of galaxy luminosity, size, velocity dispersion and stellar mass as a function of concentration index C_r and morphological type in the SDSS. We also quantify how estimates of the fraction of `early' or…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 M. Bernardi , F. Shankar , J. B. Hyde , S. Mei , F. Marulli , R. K. Sheth

We revisit the scaling relations and star-forming histories of local elliptical galaxies using a novel selection method applied to the Sloan Digital Sky Survey DR7. We combine two probability-based automated spectroscopic and morphological…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 J. A. L. Aguerri , M. Huertas-Company , J. Sánchez Almeida , C. Munoz-Tunon

We study the spatially-resolved stellar specific angular momentum $j_*$ in a high-quality sample of 24 CALIFA galaxies covering a broad range of visual morphology, accounting for stellar velocity and velocity dispersion. The shape of the…

We present a catalog of 5437 morphologically classified sources in the direction of the Perseus galaxy cluster core, among them 496 early-type low-mass galaxy candidates. The catalog is primarily based on V-band imaging data acquired with…

The Sloan Digital Sky Survey (SDSS) was foundational to the study of galaxy evolution, having revealed the bimodality of galaxies and the relationship between their structure and star-forming activity. However, ground-based optical surveys…

Astrophysics of Galaxies · Physics 2024-04-18 Chandler Osborne , Samir Salim

We study the total and baryonic mass distributions of the deflector SDSS J0100+1818 through a full strong lensing analysis. The system is composed by an ultra-massive early-type galaxy at $z=0.581$, with total stellar mass of $(1.5 \pm 0.3)…

Astrophysics of Galaxies · Physics 2023-03-08 A. Bolamperti , C. Grillo , R. Cañameras , S. H. Suyu , L. Christensen