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Broadband optical spectra are presented for 34 known and candidate nearby stars in the southern sky. Spectral types are determined using a new method that compares the entire spectrum with spectra of more than 100 standard stars. We…

Astrophysics · Physics 2009-11-07 Todd J. Henry , Lucianne M. Walkowicz , Todd C. Barto , David A. Golimowski

It is debated whether the Milky Way bulge has the characteristics of a classical bulge sooner than those of a pseudobulge. Detailed abundance studies of bulge stars is a key to investigate the origin, history, and classification of the…

During the last decade, a large number of different numerical methods have been proposed to tackle the automatic identification and quantification in {\gamma}-ray spectrometry. However, the lack of common benchmarks, including datasets,…

Machine Learning · Computer Science 2025-08-13 Dinh Triem Phan , Jérôme Bobin , Cheick Thiam , Christophe Bobin

The faint radio-source population includes sources dominated both by star formation and active galactic nuclei (AGN), encoding the evolution of activity in the Universe. To investigate its nature, we probabilistically classified 4,471 radio…

Different stellar populations may be identified through differences in chemical, kinematic, and chronological properties, suggesting the interplay of various physical mechanisms that led to their origin and subsequent evolution. As such,…

Astrophysics of Galaxies · Physics 2025-03-26 A. W. Neitzel , T. L. Campante , D. Bossini , A. Miglio

With contemporary infrared spectroscopic surveys like APOGEE, red-giant stars can be observed to distances and extinctions at which Gaia parallaxes are not highly informative. Yet the combination of effective temperature, surface gravity,…

Astrophysics of Galaxies · Physics 2019-10-02 David W. Hogg , Anna-Christina Eilers , Hans-Walter Rix

Wearable sensor systems have demonstrated a great potential for real-time, objective monitoring of physiological health to support behavioral interventions. However, obtaining accurate labels in free-living environments remains difficult…

DNA labeling is a powerful tool in molecular biology and biotechnology that allows for the visualization, detection, and study of DNA at the molecular level. Under this paradigm, a DNA molecule is being labeled by specific k patterns and is…

Information Theory · Computer Science 2024-01-24 Dganit Hanania , Daniella Bar-Lev , Yevgeni Nogin , Yoav Shechtman , Eitan Yaakobi

In the evolving landscape of data science, the accurate quantification of clustering in high-dimensional data sets remains a significant challenge, especially in the absence of predefined labels. This paper introduces a novel approach, the…

Machine Learning · Statistics 2023-11-29 Claus Metzner , Achim Schilling , Patrick Krauss

Accurately measuring the masses of white dwarf stars is crucial in many astrophysical contexts (e.g., asteroseismology and cosmochronology). These masses are most commonly determined by fitting a model atmosphere to an observed spectrum;…

Solar and Stellar Astrophysics · Physics 2016-10-10 T. A. Gomez , M. H. Montgomery , T. Nagayama , D. P. Kilcrease , D. E. Winget

We present a statistical method to derive the stellar density profiles of the Milky Way from spectroscopic survey data, taking into account selection effects. We assume that the selection function of the spectroscopic survey is based on…

Mislabeled examples are a common issue in real-world data, particularly for tasks like token classification where many labels must be chosen on a fine-grained basis. Here we consider the task of finding sentences that contain label errors…

Computation and Language · Computer Science 2022-10-24 Wei-Chen Wang , Jonas Mueller

A suite of spectroscopic surveys is producing vast sets of stellar spectra with the goal of advancing stellar physics and Galactic evolution by determining their basic physical properties. A substantial fraction of these stars are in binary…

Solar and Stellar Astrophysics · Physics 2024-06-03 Rhys Seeburger , Hans-Walter Rix , Kareem El-Badry , Maosheng Xiang , Morgan Fouesneau

Deep learning (DL) plays a more and more important role in our daily life due to its competitive performance in industrial application domains. As the core of DL-enabled systems, deep neural networks (DNNs) need to be carefully evaluated to…

Software Engineering · Computer Science 2023-02-06 Qiang Hu , Yuejun Guo , Xiaofei Xie , Maxime Cordy , Lei Ma , Mike Papadakis , Yves Le Traon

We present a comprehensive abundance analysis of 20 elements for 16 new low-metallicity stars from the Chemical Abundances of Stars in the Halo (CASH) project. The abundances have been derived from both Hobby-Eberly Telescope High…

The label quality of defect data sets has a direct influence on the reliability of defect prediction models. In this study, for multi-version-project defect data sets, we propose an approach to automatically detecting instances with…

Software Engineering · Computer Science 2021-01-29 Shiran Liu , Zhaoqiang Guo , Yanhui Li , Chuanqi Wang , Lin Chen , Zhongbin Sun , Yuming Zhou

Classification of high-dimensional spectroscopic data is a common task in analytical chemistry. Well-established procedures like support vector machines (SVMs) and partial least squares discriminant analysis (PLS-DA) are the most common…

Applications · Statistics 2021-01-29 Andrea Cappozzo , Ludovic Duponchel , Francesca Greselin , Thomas Brendan Murphy

Data collection for scientific applications is increasing exponentially and is forecasted to soon reach peta- and exabyte scales. Applications which process and analyze scientific data must be scalable and focus on execution performance to…

Instrumentation and Methods for Astrophysics · Physics 2018-10-09 Thomas Devine , Katerina Goseva-Popstojanova , Di Pang

The EXTraS project, based on data collected with the XMM-Newton observatory, provided us with a vast amount of light curves for X-ray sources. For each light curve, EXTraS also provided us with a set of features (https://extras.inaf.it). We…

High Energy Astrophysical Phenomena · Physics 2026-04-08 Mario Pasquato , Martino Marelli , Andrea De Luca , Ruben Salvaterra , Gaia Carenini , Andrea Belfiore , Andrea Tiengo , Paolo Esposito
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