Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks [PDF]
Entropy, 2022 We focus on characterizing the high-energy emission mechanisms of blazars by analyzing the variability in the radio band of the light curves of more than a thousand sources.
Belén Acosta-Tripailao +3 more
doaj +2 more sources
Classification of Low Earth Orbit (LEO) Resident Space Objects’ (RSO) Light Curves Using a Support Vector Machine (SVM) and Long Short-Term Memory (LSTM) [PDF]
Sensors, 2023 Light curves are plots of brightness measured over time. In the field of Space Situational Awareness (SSA), light curves of Resident Space Objects (RSOs) can be utilized to infer information about an RSO such as the type of object, its attitude, and its ...
Randa Qashoa, Regina Lee
doaj +2 more sources
Feature-Based Classification Neural Network for Kepler Light Curves from Quarter 1
Universe, 2023 Determining the types of light curves has been a challenge due to the massive amount of light curves generated by large sky survey programs. In the literature, the light curves classification methods are overly dependent on the imaging quality of the ...
Jing Yan +4 more
doaj +1 more source
Mass Ratio and Spot Parameter Estimation from Eclipsing Binary Star Light Curves
Galaxies, 2022 Eclipsing binary stars have a rich history of contributing to the field of stellar astrophysics. Most of the available information on the fundamental properties of stars has come from the analysis of observations of binaries. The availability of powerful
Dirk Terrell
doaj +1 more source
A Dual Perspective on Geostationary Satellite Monitoring Using DSLR RGB and sCMOS Sloan Filters
Aerospace, 2023 This paper outlines a multi-system approach for ground-based optical observations and the characterization of satellites in geostationary orbit. This multi-system approach is based on an in-depth analysis of the key factors to consider for light curve ...
Lorenzo Mariani +10 more
doaj +1 more source
Prospects of Searching for Type Ia Supernovae with 2.5-m Wide Field Survey Telescope
Universe, 2022 Type Ia supernovae (SNe Ia) are thermonuclear explosions of carbon-oxygen white dwarfs (WDs) and are well-known as a distance indicator. However, it is still unclear how WDs increase their mass near the Chandrasekhar limit and how the thermonuclear ...
Maokai Hu +6 more
doaj +1 more source
Rotation Periods of Asteroids Determined With Bootstrap Convex Inversion From ATLAS Photometry
Frontiers in Astronomy and Space Sciences, 2022 The rotation period is one of the fundamental physical characteristics of asteroids. It can be determined from photometric measurements by standard methods of time-series period analysis or by creating a physical model of an asteroid with the rotation ...
Josef Ďurech +3 more
doaj +1 more source
Dynamic equilibrium and oscillations of stars with uneven mass of particles of the medium
Известия высших учебных заведений. Поволжский регион: Физико-математические науки, 2023 Background. The study examines a model of the structure and evolution of stars in dynamic equilibrium, supplemented by a new analysis of the zonal flow velocity, new elements for describing the evolution of the heat flow, and the introduction of unequal ...
Viktor M. Zhuravlev
doaj +1 more source
Discrete Chi-square Method for Detecting Many Signals
The Open Journal of Astrophysics, 2020 Unambiguous detection of signals superimposed on unknown trends is difficult for unevenly spaced data. Here, we formulate the Discrete Chi-square Method (DCM) that can determine the best model for many signals superimposed on arbitrary polynomial trends.
Lauri Jetsu
doaj +1 more source
Magnetar Flare-driven Bumpy Declining Light Curves in Hydrogen-poor Superluminous Supernovae
The Astrophysical Journal, 2023 Recent observations indicate that hydrogen-poor superluminous supernovae (SLSNe-I) often display bumpy declining light curves. However, the cause of these undulations remains unclear.
Xiao-Fei Dong +3 more
doaj +1 more source