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We present the discovery of four low-mass ($M<0.6$ $M_\odot$) eclipsing binary (EB) systems in the sub-Gyr old Praesepe open cluster using Kepler/K2 time-series photometry and Keck/HIRES spectroscopy. We present a new Gaussian process…

We apply multi-algorithm machine learning models to TESS 2-minute survey data from Sectors 1-72 to identify stellar flares. Models trained with Deep Neural Network, Random Forest, and XGBoost algorithms, respectively, utilized four flare…

Solar and Stellar Astrophysics · Physics 2024-10-24 Chia-Lung Lin , Daniel Apai , Mark S. Giampapa , Wing-Huen Ip

Traditional spectral analysis methods are increasingly challenged by the exploding volumes of data produced by contemporary astronomical surveys. In response, we develop deep-Regularized Ensemble-based Multi-task Learning with Asymmetric…

Solar and Stellar Astrophysics · Physics 2023-11-23 Sankalp Gilda

High-precision and high-cadence photometric surveys such as Kepler or TESS are making huge progress not only in the detection of new extrasolar planets but also in the study of a great number of variable stars. This is the case for central…

Solar and Stellar Astrophysics · Physics 2024-09-11 Alba Aller , Jorge Lillo-Box , David Jones

We present RAVEN, a newly developed vetting and validation pipeline for TESS exoplanet candidates. The pipeline employs a Bayesian framework to derive the posterior probability of a candidate being a planet against a set of False Positive…

Observations of low-mass stars have frequently shown a disagreement between observed stellar radii and radii predicted by theoretical stellar structure models. This ``radius inflation'' problem could have an impact on both stellar and…

Solar and Stellar Astrophysics · Physics 2023-12-19 M. I. Swayne , P. F. L. Maxted , A. H. M. J. Triaud , S. G. Sousa , A. Deline , D. Ehrenreich , S. Hoyer , G. Olofsson , I. Boisse , A. Duck , S. Gill , D. Martin , J. McCormac , C. M. Persson , A. Santerne , D. Sebastian , M. R. Standing , L. Acuña , Y. Alibert , R. Alonso , G. Anglada , T. Bárczy , D. Barrado Navascues , S. C. C. Barros , W. Baumjohann , T. A. Baycroft , M. Beck , T. Beck , W. Benz , N. Billot , X. Bonfils , L. Borsato , V. Bourrier , A. Brandeker , C. Broeg , A. Carmona , S. Charnoz , A. Collier Cameron , P. Cortés-Zuleta , Sz. Csizmadia , P. E. Cubillos , M. B. Davies , M. Deleuil , X. Delfosse , L. Delrez , O. D. S. Demangeon , B. -O. Demory , G. Dransfield , A. Erikson , A. Fortier , T. Forveille , L. Fossati , M. Fridlund , D. Gandolfi , M. Gillon , M. Güdel , M. N. Günther , N. Hara , G. Hébrard , N. Heidari , C. Hellier , Ch. Helling , K. G. Isaak , F. Kerschbaum , F. Kiefer , L. L. Kiss , V. Kunovac , S. Lalitha , K. W. F. Lam , J. Laskar , A. Lecavelier des Etangs , M. Lendl , D. Magrin , L. Marafatto , E. Martioli , N. J. Miller , C. Mordasini , C. Moutou , V. Nascimbeni , R. Ottensamer , I. Pagano , E. Pallé , G. Peter , D. Piazza , G. Piotto , D. Pollacco , D. Queloz , R. Ragazzoni , N. Rando , H. Rauer , I. Ribas , N. C. Santos , G. Scandariato , D. Ségransan , A. E. Simon , A. M. S. Smith , R. Southworth , M. Stalport , Gy. M. Szabó , N. Thomas , S. Udry , B. Ulmer , V. Van Grootel , J. Venturini , N. A. Walton , E. Willett , T. G. Wilson

Very high quality light curves are now available for thousands of detached eclipsing binary stars and transiting exoplanet systems as a result of surveys for transiting exoplanets and other large-scale photometric surveys. I have developed…

Instrumentation and Methods for Astrophysics · Physics 2016-06-22 P. F. L. Maxted

Deep learning (DL) techniques are a promising approach among the set of methods used in the ever-challenging determination of stellar parameters in M dwarfs. In this context, transfer learning could play an important role in mitigating…

The growth of sky surveys and the large amount of stellar spectra in the current databases, has generated the necessity of developing new methods to estimate atmospheric parameters, a fundamental task on stellar research. In this work we…

Instrumentation and Methods for Astrophysics · Physics 2022-06-27 Miguel Flores R. , Luis J. Corral , Celia R. Fierro-Santillán

The NASA Transiting Exoplanet Survey Satellite (TESS) is observing tens of millions of stars with time spans ranging from $\sim$ 27 days to about 1 year of continuous observations. This vast amount of data contains a wealth of information…

Kepler Mission's single-band photometry suffers from astrophysical false positives, the most common of background eclipsing binaries (BEBs) and companion transiting planets (CTPs). Multi-color photometry can reveal the color-dependent depth…

Earth and Planetary Astrophysics · Physics 2021-09-08 Mu-Tian Wang , Hui-Gen Liu , Jiapeng Zhu , Ji-Lin Zhou

The difficulty in describing the equation of state (EoS) for nuclear matter at densities above the saturation density ($\rho_0$) has led to the emergence of a multitude of models based on different assumptions and techniques. These EoSs,…

Nuclear Theory · Physics 2024-01-17 Ameya Thete , Kinjal Banerjee , Tuhin Malik

In this work, six convolutional neural networks (CNNs) have been trained based on %different feature images and arrays from the database including 15,638 superflare candidates on solar-type stars, which are collected from the three-years…

Solar and Stellar Astrophysics · Physics 2022-09-19 Zuo-Lin Tu , Qin Wu , Wenbo Wang , G. Q. Zhang , Zi-Ke Liu , F. Y. Wang

For densities beyond nuclear saturation, there is still a large uncertainty in the equations of state (EoS) of dense matter that translate into uncertainties in the internal structure of neutron stars. The MUSES Calculation Engine provides…

Nuclear Theory · Physics 2025-05-22 Mateus Pelicer , Veronica Dexheimer , Joaquin Grefa

Two-dimensional electronic spectroscopy has become one of the main experimental tools for analyzing the dynamics of excitonic energy transfer in large molecular complexes. Simplified theoretical models are usually employed to extract model…

Chemical Physics · Physics 2019-01-17 Mirta Rodríguez , Tobias Kramer

We present the physical parameters of an eclipsing binary system EPIC 211982753 derived through photometric and radial velocity data modeling. We make use of photometric data from NASA's K2 mission, ASAS-SN, and 1.3-m Devasthal Fast Optical…

Solar and Stellar Astrophysics · Physics 2023-08-23 Alaxender Panchal , Yogesh C. Joshi

Stellar astrophysics relies on diverse observational modalities-primarily photometric light curves and spectroscopic data from which fundamental stellar properties are inferred. While machine learning (ML) has advanced analysis within…

Solar and Stellar Astrophysics · Physics 2025-10-07 Ilay Kamai , Alex M. Bronstein , Hagai B. Perets

Astroseismology in eclipsing binaries with Delta ($\delta$) Scuti components offers a powerful means to derive stellar parameters and probe internal structures. To enable accurate frequency analysis, binary characteristics must be…

Solar and Stellar Astrophysics · Physics 2025-04-02 J. A. D. M. Dharmathilaka , J. Adassuriya , K. P. S. C. Jayaratne , Jordi L. Gutierrez

We present a detailed analysis of the low-mass detached eclipsing binary system BB Persei, which contains two K-type stars in a circular orbit with a short period of 0.4856 d. We used light curves from the Transiting Exoplanet Survey…

With manual searching processes, the rate at which scientists and astronomers discover exoplanets is slow because of inefficiencies that require an extensive time of laborious inspections. In fact, as of now there have been about only 5,000…

Machine Learning · Computer Science 2025-07-29 Ethan Lo , Dan C. Lo
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