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The Universal Rotation Curve (URC) of disk galaxies was originally proposed to predict the shape and amplitude of any rotation curve (RC) based solely on photometric data. Here, the URC is investigated with an extensive set of…

Astrophysics of Galaxies · Physics 2024-06-21 Raj Patel , Nikhil Arora , Stéphane Courteau , Connor Stone , Matthew Frosst , Lawrence Widrow

Model fitting is frequently used to determine the shape of galaxies and the point spread function, for examples, in weak lensing analyses or morphology studies aiming at probing the evolution of galaxies. However, the number of parameters…

Cosmology and Nongalactic Astrophysics · Physics 2012-10-03 Guoliang Li , Bo Xin , Wei Cui

Forbush decreases (FDs) are short-term depressions in the galactic cosmic ray flux and one of the common signatures of coronal mass ejections (CMEs) in the heliosphere. They often show a two-step profile, the second one associated with the…

Solar and Stellar Astrophysics · Physics 2024-01-18 M. Dumbovic , L. Kramaric , I. Benko , B. Heber , B. Vrsnak

To address the the problem of calibration of instrument systematics in transit light curves, we present the Python package ExoTiC-ISM. Transit spectroscopy can reveal many different chemical components in exoplanet atmospheres, but such…

Instrumentation and Methods for Astrophysics · Physics 2020-07-16 Iva Laginja , Hannah R. Wakeford

Time-correlated noise is a significant source of uncertainty when modeling exoplanet light-curve data. A correct assessment of correlated noise is fundamental to determine the true statistical significance of our findings. Here we review…

Earth and Planetary Astrophysics · Physics 2016-12-21 Patricio Cubillos , Joseph Harrington , Thomas J. Loredo , Nate B. Lust , Jasmina Blecic , Madison Stemm

We conduct a comprehensive study of the effects of incorporating galaxy morphology information in photometric redshift estimation. Using machine learning methods, we assess the changes in the scatter and catastrophic outlier fraction of…

Color fundus image (CFI) bounds detection and contrast enhancement are fundamental tasks in automatic CFI analysis. We present an open-source algorithm, published as a Python package, to automatically extract parametric bounds from color…

Other Quantitative Biology · Quantitative Biology 2025-12-19 Jose Vargas Quiros , Bart Liefers , Karin van Garderen , Eyened Reading Center , Caroline Klaver

Image restoration aims to restore high-quality images from degraded counterparts and has seen significant advancements through deep learning techniques. The technique has been widely applied to mobile devices for tasks such as mobile…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Xiangyu Chen , Ruiwen Zhen , Shuai Li , Xiaotian Li , Guanghui Wang

We present an all-sky map of the synchrotron spectral index and curvature between 45 and 2300 MHz at a resolution of 1 degree calculated from a combination of numerous partial sky empirical measurements. We employ a least-squares parametric…

Astrophysics of Galaxies · Physics 2026-04-08 Melis O. Irfan , Giuseppe Puglisi

Reinforcement Fine-Tuning (RFT) on flow-based models is crucial for preference alignment. However, they often introduce visual hallucinations like over-optimized details and semantic misalignment. This work preliminarily explores why visual…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Xiaofeng Tan , Jun Liu , Yuanting Fan , Bin-Bin Gao , Xi Jiang , Xiaochen Chen , Jinlong Peng , Chengjie Wang , Hongsong Wang , Feng Zheng

Despite significant advances in document understanding, determining the correct orientation of scanned or photographed documents remains a critical pre-processing step in the real world settings. Accurate rotation correction is essential…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Suranjan Goswami , Abhinav Ravi , Raja Kolla , Ali Faraz , Shaharukh Khan , Akash , Chandra Khatri , Shubham Agarwal

CurvPy is an open-source Python library for automated curve fitting and regression analysis, aiming to make advanced statistical and machine learning techniques more accessible. This paper explores the mathematical foundations and…

Databases · Computer Science 2024-07-09 Sidharth S S

For many shape analysis problems in computer vision and scientific imaging (e.g., computational anatomy, morphological cytometry), the ability to align two closed curves in the plane is crucial. In this paper, we concentrate on rigidly…

Differential Geometry · Mathematics 2025-01-30 Günay Dogan , Javier Bernal , Charles Hagwood

We present here the first release of the open-source python package ExoTETHyS, which aims to provide a stand-alone set of tools for modeling spectro-photometric observations of the transiting exoplanets. In particular, we describe: (1) a…

Earth and Planetary Astrophysics · Physics 2020-02-05 Giuseppe Morello , Antonio Claret , Marine Martin-Lagarde , Christophe Cossou , Angelos Tsiaras , Pierre-Olivier Lagage

The APOSTLE cosmological hydrodynamical simulation suite is a collection of twelve regions $\sim 5$ Mpc in diameter, selected to resemble the Local Group of galaxies in terms of kinematics and environment, and re-simulated at high…

Astrophysics of Galaxies · Physics 2018-08-22 Kyle A. Oman

We analyse maps of the spatially-resolved nebular emission of $\approx$1500 star-forming galaxies at $z\approx0.6$-$2.2$ from deep KMOS and MUSE observations to measure the average shape of their rotation curves. We use these to test claims…

We introduce an adaptable kinematic modelling tool called ROHSA-SNAPD, "Spatially Non-parametric Approach to PSF Deconvolution using ROHSA". ROHSA-SNAPD utilises kinematic regularisation to forward model the intrinsic emission-line flux and…

Astrophysics of Galaxies · Physics 2025-09-22 Isaac Kanowski , Emily Wisnioski , J. Trevor Mendel , Antoine Marchal , Takafumi Tsukui

There are many application fields for robotic systems including service robotics, search and rescue missions, industry and space robotics. As the scenarios in these areas grow more and more complex, there is a high demand for powerful tools…

Robotics · Computer Science 2016-05-31 Sebastian G. Brunner , Franz Steinmetz , Rico Belder , Andreas Dömel

We propose a new framework to predict stellar properties from light curves. We analyze the light-curve data from the Kepler space mission and develop a novel tool for deriving the stellar rotation periods for main-sequence stars. Using this…

Solar and Stellar Astrophysics · Physics 2024-11-26 Ilay Kamai , Hagai B. Perets

The early and complete temporal characterization of optical, fast, transient sources requires continuous and multiband observations over different timescales (hours to months). For time-domain astronomy, using several telescopes to analyze…

Instrumentation and Methods for Astrophysics · Physics 2022-11-29 P. A. Duverne , S. Antier , S. Basa , D. Corre , M. W. Coughlin , A. V. Filippenko , A. Klotz , P. Hello , W. Zheng