Search Results - "Optical 3D Laser Measurement Systems Optimization"

The VISCACHA survey – X. A fast method to build completeness maps for Magellanic Clouds star clusters

Authors: João F Gardin J. F. C. Santos F. F. S. Maia et al.

Source: Monthly Notices of the Royal Astronomical Society. 532:1683-1700

Subject Terms: Optical 3D Laser Measurement Systems Optimization, Physics, Astronomy, 4. Education, Computational Mechanics, Astronomy and Astrophysics, Stellar Astrophysics and Exoplanet Studies, Astrophysics, Stars, Mathematical analysis, Star cluster, Astronomical Data Analysis, Completeness (order theory), Engineering, Physics and Astronomy, Astronomical Instrumentation and Spectroscopy, Physical Sciences, FOS: Mathematics, 10. No inequality, Instrumentation, Large Magellanic Cloud, Mathematics, Star (game theory)

OzDES Reverberation Mapping Program: Stacking analysis with Hβ, Mg ii, and C iv

Authors: Umang Malik Robert Sharp Andrew Penton et al.

Source: Monthly Notices of the Royal Astronomical Society. 531:163-182

Subject Terms: Theoretical and Computational Physics, Laser Scanning, Optical 3D Laser Measurement Systems Optimization, Physics, Reverberation, Computational Mechanics, FOS: Physical sciences, Astronomy and Astrophysics, Statistical and Nonlinear Physics, Acoustics, Astrophysics - Astrophysics of Galaxies, Gamma-Ray Bursts and Supernovae Connections, Nuclear magnetic resonance, Engineering, Physics and Astronomy, Stacking, 13. Climate action, Astrophysics of Galaxies (astro-ph.GA), Physical Sciences

File Description: text

Access URL: http://arxiv.org/abs/2405.06100

Dark Energy Survey Year 6 results: Intra-cluster light from redshift 0.2 to 0.5

Authors: Zhang Y. Golden-Marx J. B. Ogando R. L. C. et al.

Contributors: Zhang Y. Golden-Marx J. B. Ogando R. L. C. et al.

Source: Monthly Notices of the Royal Astronomical Society. 531:510-529

Subject Terms: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, FOS: Physical sciences, Stellar Astrophysics and Exoplanet Studies, Cluster (spacecraft), Astrophysics, 01 natural sciences, Quantum mechanics, Astronomical Data Analysis, Engineering, Astronomical Instrumentation and Spectroscopy, 0103 physical sciences, Dark energy, Instrumentation, Physics, Astronomy and Astrophysics, Redshift, galaxies: evolution, galaxies: clusters: general, Astrophysics - Astrophysics of Galaxies, Computer science, Cosmology, Programming language, Galaxy, Physics and Astronomy, Astrophysics of Galaxies (astro-ph.GA), Physical Sciences, Energy (signal processing), Astrophysics - Cosmology and Nongalactic Astrophysics

File Description: application/pdf; text

Access URL: http://arxiv.org/abs/2309.00671
https://hdl.handle.net/11368/3086705
https://academic.oup.com/mnras/article/531/1/510/7665764?login=true

Chemical abundances of LINER galaxies – nitrogen abundance estimations

Authors: C B Oliveira Â. C. Krabbe O. L. Dors et al.

Source: Monthly Notices of the Royal Astronomical Society. 531:199-212

Subject Terms: GALAXIES: ABUNDANCES, Nitrogen, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Abundance (ecology), FOS: Physical sciences, Astrophysics, Quantum mechanics, Agricultural and Biological Sciences, Astronomical Data Analysis, Engineering, 11. Sustainability, 14. Life underwater, 10. No inequality, Biology, Effects of Beta-Adrenergic Agonists in Livestock, GALAXIES: NUCLEI, Ecology, ISM: ABUNDANCES, Physics, Life Sciences, 15. Life on land, Astrophysics - Astrophysics of Galaxies, Galaxy, 13. Climate action, FOS: Biological sciences, Astrophysics of Galaxies (astro-ph.GA), Physical Sciences, Animal Science and Zoology, ASTROPHYSICS: ASTROPHYSICS OF GALAXIES

File Description: application/pdf

Access URL: http://arxiv.org/abs/2404.16631
http://hdl.handle.net/11336/245027

The S-PLUS Fornax Project (S+FP): SExtractor detection and measurement of nearby galaxies in large photometric surveys

Authors: R. F. Haack A. V. Smith Castelli C. Mendes de Oliveira et al.

Source: Monthly Notices of the Royal Astronomical Society. 530:3195-3207

Subject Terms: Optical 3D Laser Measurement Systems Optimization, Physics, Astronomy, Multi-Object Spectroscopy, Computational Mechanics, FOS: Physical sciences, Astrophysics, Astrophysics - Astrophysics of Galaxies, Stars, Red shift, Galaxy, Engineering, Physics and Astronomy, Photometry (optics), 13. Climate action, Astrophysics of Galaxies (astro-ph.GA), Astronomical Instrumentation and Spectroscopy, Physical Sciences, Quadrant Photodetector, Position-Sensitive Detector, 14. Life underwater, 10. No inequality, Instrumentation

Access URL: http://arxiv.org/abs/2404.10847

A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070

Authors: Carys Herbert D. Froebrich S. Vanaverbeke et al.

Contributors: Carys Herbert D. Froebrich S. Vanaverbeke et al.

Source: Monthly Notices of the Royal Astronomical Society. 529:4856-4878

Subject Terms: star spots [Stars], Stars: formation, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Stellar Astrophysics and Exoplanet Studies, Astrophysics, Stars: star spots, Engineering, Astronomical Instrumentation and Spectroscopy, 14. Life underwater, Instrumentation, Stars: variables: T Tauri, formation [Stars], pre-main-sequence [Stars], Physics, Stars: rotation, Multi-Object Spectroscopy, Astronomy and Astrophysics, 3rd-DAS, Stars, rotation [Stars], Physics and Astronomy, Variable star, 13. Climate action, variables: T Tauri [Stars], Physical Sciences, Stars: pre-main-sequence

File Description: application/pdf

Access URL: https://hdl.handle.net/10023/29637

The classical T Tauri star CI Tau observed with SPIRou: magnetospheric accretion and planetary formation

Authors: J.-F. Donati Benjamin Finociety P. I. Cristofari et al.

Contributors: J.-F. Donati Benjamin Finociety P. I. Cristofari et al.

Source: Monthly Notices of the Royal Astronomical Society

Subject Terms: stars, Optical 3D Laser Measurement Systems Optimization, Astronomy, imaging -stars, Computational Mechanics, Accretion (finance), Stellar Astrophysics and Exoplanet Studies, magnetic fields -stars, CI Tautechniques, Astrophysics, 01 natural sciences, 7. Clean energy, [SDU] Sciences of the Universe [physics], Astronomical Data Analysis, formation -stars, planetary systems -stars, Engineering, 0103 physical sciences, 14. Life underwater, individual, Formation and Evolution of the Solar System, Physics, Astronomy and Astrophysics, stars magnetic fields -stars imaging -stars planetary systems -stars formation -stars individual CI Tautechniques polarimetric, Stars, Physics and Astronomy, [SDU]Sciences of the Universe [physics], 13. Climate action, Physical Sciences, T Tauri star, polarimetric, Accretion disc

File Description: application/pdf

Access URL: https://cnrs.hal.science/hal-04752333v1/document
https://doi.org/10.1093/mnras/stae675
https://cnrs.hal.science/hal-04752333v1

Celestial Object Detection in Astronomical Images Using MSE and Jacobi Moments

Authors: Ismail Naouadir Omar El Ogri Jaouad El-Mekkaoui et al.

Source: Statistics, Optimization & Information Computing. 12:660-671

Subject Terms: Artificial intelligence, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Aerospace Engineering, FOS: Mechanical engineering, Zernike polynomials, Magnetic Sensing, Astronomical Data Analysis, Engineering, Wavefront, Ancient Astronomy and Mathematical Instruments, Historical Astronomy, Velocity Moments, Observability Analysis, Physics, 4. Education, Astronomy and Astrophysics, Geology, Optics, FOS: Earth and related environmental sciences, Remote sensing, 15. Life on land, Computer science, Astronomical Calculator, Physics and Astronomy, Physical Sciences, Object (grammar), Computer vision, Inertial Navigation Systems and Sensor Fusion Techniques

The S-PLUS Transient Extension Program: imaging pipeline, transient identification, and survey optimization for multimessenger astronomy

Authors: Angelo Santos C. D. Kilpatrick Clécio R. Bom et al.

Source: Monthly Notices of the Royal Astronomical Society. 529:59-73

Subject Terms: Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, FOS: Physical sciences, FOS: Mechanical engineering, Astrophysics, 7. Clean energy, Identification (biology), Engineering, Astronomical Instrumentation and Spectroscopy, Position-Sensitive Detector, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Biology, Transient (computer programming), High Energy Astrophysical Phenomena (astro-ph.HE), Extension (predicate logic), Physics, Multi-Object Spectroscopy, Botany, Adaptive Optics in Astronomy and Space Telescopes, Computer science, Atomic and Molecular Physics, and Optics, Mechanical engineering, Programming language, Operating system, Physics and Astronomy, 13. Climate action, Physical Sciences, Pipeline (software), Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena

Access URL: http://arxiv.org/abs/2312.15057

TransitFit: combined multi-instrument exoplanet transit fitting for JWST, HST, and ground-based transmission spectroscopy studies: combined multi-instrument exoplanet transit fitting for JWST, HST, and ground-based transmission spectroscopy studies

Authors: J. J. C. Hayes Akshay Priyadarshi E. Kerins et al.

Source: The SPEARNET Collaboration 2024, 'TransitFit : combined multi-instrument exoplanet transit fitting for JWST, HST, and ground-based transmission spectroscopy studies', Monthly Notices of the Royal Astronomical Society, vol. 527, no. 3, pp. 4936-4954. https://doi.org/10.1093/mnras/stad3353

Subject Terms: Optical 3D Laser Measurement Systems Optimization, Astronomy, FOS: Political science, software: data analysis, Computational Mechanics, FOS: Physical sciences, Light curve, FOS: Law, Stellar Astrophysics and Exoplanet Studies, Astrophysics, methods: analytical, Engineering, software: public release, Astronomical Instrumentation and Spectroscopy, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Telescope, Political science, planets and satellites: atmospheres, Earth and Planetary Astrophysics (astro-ph.EP), Spectrograph, Physics, William Herschel Telescope, Multi-Object Spectroscopy, Astronomy and Astrophysics, Ephemeris, methods: data analysis, Exoplanet, Physics and Astronomy, 13. Climate action, Satellite, Physical Sciences, Transit (satellite), Hot Jupiter, Planet, Public transport, Astrophysics - Instrumentation and Methods for Astrophysics, Law, Astrophysics - Earth and Planetary Astrophysics, Spectral line

Access URL: http://arxiv.org/abs/2103.12139

PROPOSED STRATEGY TO OBTAIN OPTIMUM INTER-STATION DISTANCE FOR GPS CORS DEVELOPMENT SCENARIO

Authors: N. A. A. Rahman T. A. Musa W. A. Wan Aris et al.

Source: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLVIII-4-W6-2022, Pp 431-437 (2023)

Subject Terms: Technology, Optical 3D Laser Measurement Systems Optimization, Computational Mechanics, 0211 other engineering and technologies, Aerospace Engineering, FOS: Mechanical engineering, 02 engineering and technology, Oceanography, 01 natural sciences, Environmental science, Engineering, Global Navigation Satellite Systems (GNSS), Global Positioning System, Applied optics. Photonics, 0105 earth and related environmental sciences, Geography, Baseline (sea), Ambiguity resolution, Geology, GPS Integration, Kilometer, Transport engineering, FOS: Earth and related environmental sciences, Engineering (General). Civil engineering (General), Computer science, TA1501-1820, GNSS applications, Physical Sciences, Telecommunications, Inertial Navigation Systems and Sensor Fusion Techniques, TA1-2040, Geodesy

File Description: application/pdf

Access URL: https://isprs-archives.copernicus.org/articles/XLVIII-4-W6-2022/431/2023/
https://doaj.org/article/bd867b5eae8a4d9da1b73d244c3971d3

Online Measuring of Robot Positions Using Inertial Measurement Units, Sensor Fusion and Artificial Intelligence

Authors: Benedito A. N. Campos José Maurício S. T. Motta

Source: IEEE Access, Vol 9, Pp 5678-5689 (2021)

Subject Terms: Artificial neural network, Artificial intelligence, 0209 industrial biotechnology, Robot, Optical 3D Laser Measurement Systems Optimization, Computational Mechanics, Aerospace Engineering, FOS: Mechanical engineering, Noise (video), 02 engineering and technology, Simultaneous Localization and Mapping, Robotic Navigation, Real-time computing, online robot calibration, Engineering, FOS: Mathematics, Image (mathematics), Position-Sensitive Detector, sensor fusion, Sensor fusion, Attitude Estimation, Sensor Fusion, Statistics, neural networks, Computer science, TK1-9971, Process (computing), Operating system, Inertial measurement unit, Parametric statistics, IMU calibration, Physical Sciences, Calibration, Electrical engineering. Electronics. Nuclear engineering, Inertial Navigation Systems and Sensor Fusion Techniques, Inertial Navigation Systems, Mathematics

Access URL: https://ieeexplore.ieee.org/ielx7/6287639/9312710/09312193.pdf
https://doaj.org/article/818c1aeb535a416aaf1fe3e60a45773b
https://ieeexplore.ieee.org/document/9312193/
https://dblp.uni-trier.de/db/journals/access/access9.html#CamposM21

Editorial: Planetary nebulae as tools for astrophysics

Authors: M. Peña K. B. Kwitter M. M. Miller Bertolami et al.

Source: Frontiers in Astronomy and Space Sciences, Vol 10 (2023)

Subject Terms: Common envelope, Asymptotic giant branch, Optical 3D Laser Measurement Systems Optimization, Astronomy, Geophysics. Cosmic physics, Nebula, Computational Mechanics, Planetary nebula, QB1-991, Stellar Astrophysics and Exoplanet Studies, Astrophysics, 7. Clean energy, 01 natural sciences, Engineering, Interstellar medium, Astronomical Instrumentation and Spectroscopy, 11. Sustainability, 0103 physical sciences, diagnostics, Planetary Systems, Instrumentation, 0105 earth and related environmental sciences, interstellar medium, QC801-809, Physics, Stellar nucleosynthesis, Astronomy and Astrophysics, planetary nebulae, White dwarf, Stars, Galaxy, Physics and Astronomy, kinematics, 13. Climate action, Physical Sciences, chemical evolution, Nucleosynthesis, catalogs

Access URL: https://doaj.org/article/b6a7766b8fef431b95fe1076451cfe50

Characterizing B stars from Kepler/K2 Campaign 11: Optical analysis and seismic diagnostics

Authors: Alan W. Pereira Eduardo Janot-Pacheco Marcelo Emilio et al.

Source: Astronomy & Astrophysics. 686:A20

Subject Terms: Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Geometry, Light curve, Stellar Astrophysics and Exoplanet Studies, Astrophysics, 7. Clean energy, Astronomical Data Analysis, Engineering, Astronomical Instrumentation and Spectroscopy, FOS: Mathematics, 14. Life underwater, Instrumentation, Physics, 4. Education, Asteroseismology, Astronomy and Astrophysics, Stars, Physics and Astronomy, Variable star, 13. Climate action, Physical Sciences, Kepler, Rotation (mathematics), Mathematics, Spectral line

The internal Faraday screen of Sagittarius A*

Authors: Maciek Wielgus Sara Issaoun Iván Martí-Vidal et al.

Source: Astronomy & Astrophysics, 682, pp. 1-12
A&A

Subject Terms: Nuclear and High Energy Physics, Optical 3D Laser Measurement Systems Optimization, Astronomy, black hole physics, Computational Mechanics, FOS: Physical sciences, magnetic fields, Astrophysics, 01 natural sciences, Quantum mechanics, Astronomical Data Analysis, Engineering, 0103 physical sciences, Ancient Astronomy and Mathematical Instruments, High-Energy Astrophysics and Particle Acceleration Studies, Sagittarius A, Sagittarius, Faraday cage, High Energy Astrophysical Phenomena (astro-ph.HE), polarization, Galaxy: center, Physics, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Stars, Milky Way, techniques: polarimetric, Magnetic field, Physics and Astronomy, techniques: interferometric, Astrophysics of Galaxies (astro-ph.GA), Physical Sciences, Astrophysics - High Energy Astrophysical Phenomena

File Description: application/pdf

Access URL: http://arxiv.org/abs/2308.11712
https://hdl.handle.net/https://repository.ubn.ru.nl/handle/2066/304677
https://doi.org/10.1051/0004-6361/202347772
https://repository.ubn.ru.nl/handle/2066/304677
https://repository.ubn.ru.nl//bitstream/handle/2066/304677/304677.pdf
https://hdl.handle.net/11584/406607
https://doi.org/10.1051/0004-6361/202347772

Chemical fingerprints of He-sdO stars

Authors: M. Schindewolf Péter Németh U. Heber et al.

Source: Open Astronomy, Vol 27, Iss 1, Pp 27-34 (2018)
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP

Subject Terms: slow merger, he-sdo, Abundance of the chemical elements, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, QB1-991, Neon, Stellar Astrophysics and Exoplanet Studies, Astrophysics, Helium, Instability strip, Quantum mechanics, 7. Clean energy, 01 natural sciences, Atomic physics, Effective temperature, Astronomical Data Analysis, Engineering, hot flasher, Astronomical Instrumentation and Spectroscopy, 0103 physical sciences, Argon, Instrumentation, atmospheric parameters, Cepheid variable, abundances, Physics, 4. Education, Astronomy and Astrophysics, White dwarf, Stars, Solar mass, He-sdO, Surface gravity, Astronomía, Physics and Astronomy, subdwarfs, 13. Climate action, Physical Sciences, stellar atmospheres, Spectral line, Hydrogen

File Description: application/pdf

Access URL: https://doaj.org/article/0089a23068ae4c538856cf26d30cfcd0
http://sedici.unlp.edu.ar/handle/10915/78622
https://www.degruyter.com/view/j/astro.2018.27.issue-1/astro-2018-0010/astro-2018-0010.xml
https://doaj.org/article/0089a23068ae4c538856cf26d30cfcd0
https://ui.adsabs.harvard.edu/abs/2018OAst...27...27S/abstract
http://sedici.unlp.edu.ar/bitstream/handle/10915/78622/Documento_completo.pdf?sequence=1
https://core.ac.uk/display/156967234
http://sedici.unlp.edu.ar/handle/10915/78622

NuSTAR and XMM-Newton observations of the binary 4FGL J1405.1–6119

Authors: Enzo A. Saavedra Federico A. Fogantini Gastón J. Escobar et al.

Source: Astronomy & Astrophysics. 680:A88

Subject Terms: X-Ray Astronomy, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Neutron star, Light curve, Stellar Astrophysics and Exoplanet Studies, Astrophysics, 7. Clean energy, Astrophysical Studies of Black Holes, Quantum mechanics, Power law, Engineering, Context (archaeology), Jet (fluid), FOS: Mathematics, 10. No inequality, Biology, Radiation, Arithmetic, Physics, Statistics, Paleontology, Astronomy and Astrophysics, Epoch (astronomy), Stars, Physics and Astronomy, 13. Climate action, Black-body radiation, Physical Sciences, Thermodynamics, Binary number, Mathematics, Spectral line

Classification of Chandra X-Ray Sources in Cygnus OB2

Authors: V. Kashyap M. G. Guarcello N. J. Wright et al.

Contributors: V. Kashyap M. G. Guarcello N. J. Wright et al.

Source: The Astrophysical Journal Supplement Series, Vol 269, Iss 1, p 10 (2023)
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas

Subject Terms: Artificial intelligence, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, FOS: Physical sciences, Bayesian statistics, Astrophysics, 01 natural sciences, Astrophysical Studies of Black Holes, Astrostatistics techniques, Open star clusters, OB associations, Astrostatistics, Astronomical Data Analysis, Star forming regions, Engineering, 85A35 (Primary), 85A15, 62H30, 62P99 (Secondary), 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), Telescope, Solar and Stellar Astrophysics (astro-ph.SR), High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astronomy and Astrophysics, Optics, Stellar classification, Astrophysics - Astrophysics of Galaxies, Extinction (optical mineralogy), Stars, Computer science, Gamma-Ray Bursts and Supernovae Connections, QB460-466, X-ray stars, Astrophysics - Solar and Stellar Astrophysics, Physics and Astronomy, Photometry (optics), Astrophysics of Galaxies (astro-ph.GA), Physical Sciences, Catalogs, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Sky, Infrared, Standart stars, Discriminant

File Description: application/pdf

Access URL: http://arxiv.org/abs/2306.06832
https://doaj.org/article/dae495f84fe24d82b1bd5cef68bad6d6
http://hdl.handle.net/11336/232445
http://hdl.handle.net/20.500.12386/35838

K2 and TESS observations of symbiotic X-ray binaries: GX 1+4 and IGR J16194−2810

Authors: G. J. M. Luna

Source: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas

Subject Terms: Pulsar Timing, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, FOS: Physical sciences, Neutron star, Light curve, STARS: INDIVIDUAL: GX 1+4, Astrophysics, Astrophysical Studies of Black Holes, Engineering, Pulsar, Spin (aerodynamics), Observation and Study of Gravitational Waves Phenomenon, Solar and Stellar Astrophysics (astro-ph.SR), High Energy Astrophysical Phenomena (astro-ph.HE), Physics, STARS: INDIVIDUAL: IGR J16194-2810, Astronomy and Astrophysics, Stars, Gamma-Ray Bursts and Supernovae Connections, X-ray binary, Astrophysics - Solar and Stellar Astrophysics, Physics and Astronomy, Physical Sciences, Thermodynamics, Astrophysics - High Energy Astrophysical Phenomena, Orbital period, BINARIES: SYMBIOTIC

File Description: application/pdf

Access URL: http://arxiv.org/abs/2307.01873
http://hdl.handle.net/11336/219538

VVV-VIVACE ID 533558 (=OGLE RRLYR-09505): The Half-day Period as a Challenge for the Automatic Searches for Variable Stars

Authors: L José R. K. Saito A. Kanaan et al.

Source: Research Notes of the AAS. 7:140

Subject Terms: Period (music), Optical 3D Laser Measurement Systems Optimization, Computational Mechanics, Light curve, Set (abstract data type), Stellar Astrophysics and Exoplanet Studies, Globular cluster, Astrophysics, 01 natural sciences, Mathematical analysis, Astronomical Data Analysis, Engineering, Astronomical Instrumentation and Spectroscopy, 0103 physical sciences, FOS: Mathematics, 14. Life underwater, Variable (mathematics), Instrumentation, Arithmetic, Physics, 4. Education, Statistics, Astronomy and Astrophysics, Optics, Detector, Acoustics, Sampling (signal processing), 15. Life on land, Stars, Computer science, Programming language, Physics and Astronomy, Variable star, 13. Climate action, Physical Sciences, Binary number, Multiple, RR Lyrae variable, Mathematics