Special Issues

Universe publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic. The journal’s Editor-in-Chief and/or designated EBM will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Probing the Early Universe
edited by
submission deadline 30 May 2024 | Viewed by 237 | Submission Open
Keywords: the Planck era (t < 10-43  s); grand unification era (t < 10-36  s); the inflationary era (t < 10-33  s); electroweak epoch (10-33  s < t < 10-12  s); quark era (10-12  s < t < 10-5  s); hadron era (10-5  s < t < 1 s); lepton era with neutrino decoupling (1 s < t < 10 s); cosmic nucleosynthesis (10 s < t < 1000 s); radiation dominated and ‘ foggy’ era (1000 s < t < 380; 000 years); recombination (18; 000 years < t < 380; 000 years); the dark era (380; 000 years < t < 150 million years); first stars and galaxies (200 to 400 million years); cosmic reionization (200 million to 1 billion years)
(This special issue belongs to the Section Cosmology)
Solar and Stellar Activity: Exploring the Cosmic Nexus
edited by Emese Forgacs-Dajka and Zsofia Bebesi
submission deadline 31 May 2024 | 1 articles | Viewed by 654 | Submission Open
Keywords: astrophysical HD/MHD; solar and stellar activity; space weather; solar and stellar dynamo
(This special issue belongs to the Section Space Science)
Planetary Space Weather
edited by , Sae Aizawa and Lina Hadid
submission deadline 31 May 2024 | 1 articles | Viewed by 585 | Submission Open
Keywords: space weather; planetary environment; solar– planet interactions; sun activity; magnetosphere dynamics
(This special issue belongs to the Section Planetary Sciences)
Blazar Bursts: Theory and Observation
edited by Yunguo Jiang
submission deadline 31 May 2024 | Viewed by 252 | Submission Open
Keywords: active galactic nuclei; blazars; supermassive black holes; flat-spectrum radio quasars; individual BL Lacertae objects; observational astronomy; radiation mechanisms: general; polarization
(This special issue belongs to the Section Compact Objects)
Quantum Physics including Gravity: Highlights and Novelties
edited by
submission deadline 30 Jun 2024 | 5 articles | Viewed by 7319 | Submission Open
Keywords: quantum physics; curved space-times; cosmology; black holes; semi-classical gravity; quantum gravity; trans-Planckian physics; quantum space-time
(This special issue belongs to the Section Gravitation)
Stellar Multi-Band Observational Studies in the Era of Big Data
edited by
submission deadline 30 Jun 2024 | 3 articles | Viewed by 4404 | Submission Open
Keywords: variable star; eclipsing binary; photospheric starspot; chromospheric activity; corona; flare; radio; X-ray; big data; statistic
(This special issue belongs to the Section Stellar Astronomy)
Neutrinos across Different Energy Scales submission deadline 30 Jun 2024 | 3 articles | Viewed by 3571 | Submission Open
Keywords: astroparticle physics; neutrino physics; primordial Universe; relic neutrinos; supernova neutrinos; solar neutrinos; atmospheric neutrinos; high-energy neutrinos; physics beyond the Standard Model
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Focus on Active Galactic Nuclei
edited by Li Zhang and
submission deadline 30 Jun 2024 | 2 articles | Viewed by 2941 | Submission Open
Keywords: active galactic nuclei; supermassive black hole binaries; extragalactic gamma-ray astronomy; gamma-ray instrumentation; probabilistic models for astrophysical data
(This special issue belongs to the Section Galaxies and Clusters)
Advanced Studies in Gravitational Waves
edited by Arnab Dasgupta
submission deadline 30 Jun 2024 | 2 articles | Viewed by 2542 | Submission Open
Keywords: early universe phase transition; gravitational waves; topological defects; cosmic strings; domain walls; inflation
(This special issue belongs to the Section Gravitation)
Small-Scale Eruptions on the Sun submission deadline 30 Jun 2024 | 2 articles | Viewed by 2540 | Submission Open
Keywords: solar eruption; magnetic reconnection; coronal heating; magneto-hydrodynamics (MHD); spicules; jets; bright points; nano-flares; camp fires
(This special issue belongs to the Section Space Science)
The Large-Scale Structure of the Universe: Theory and Observation
edited by
submission deadline 30 Jun 2024 | 1 articles | Viewed by 1266 | Submission Open
Keywords: cosmology; large-structure of the universe; galaxy clusters; cosmic voids; cosmic web; gravitational instability; gravity theories; cosmological parameters; dark matter; dark energy; redshift surveys; gravitational lensing; numerical cosmology; statistical learning; theory; observation
(This special issue belongs to the Section Cosmology)
Formation and Evolution of Exoplanets
edited by Xian-Yu Wang
submission deadline 30 Jun 2024 | 1 articles | Viewed by 1063 | Submission Open
Keywords: exoplanets; planetary system formation and evolution; planetary architectures; planetary dynamics; observational astronomy; astrophysical methods and techniques
(This special issue belongs to the Section Planetary Sciences)
Gravity and Cosmology: Exploring the Mysteries of f(T) Gravity
edited by , Hemily Gomes Marciano Fortes and
submission deadline 30 Jun 2024 | Viewed by 246 | Submission Open
Keywords: gravity; general relativity; teleparallel theory; torsion; extended teleparallel theory; cosmology; compact stars
(This special issue belongs to the Section Gravitation)
Advanced Studies in Ultra-High-Energy Cosmic Rays
edited by and François Montanet
submission deadline 30 Jul 2024 | Viewed by 423 | Submission Open
Keywords: cosmic rays; air showers; neutral particles; hadronic interactions; production processes; emission mechanisms; detection techniques; Monte Carlo simulations
(This special issue belongs to the Section Space Science)
Cosmological Models of the Universe submission deadline 31 Jul 2024 | 1 articles | Viewed by 1108 | Submission Open
Keywords: standard cosmological model; dark matter; dark energy; bounce cosmology; inflation cosmology; Λ CDM-cosmology; anisotropic cosmology
(This special issue belongs to the Section Cosmology)
The Nature of Dark Energy
edited by Alexander Bonilla and
submission deadline 31 Jul 2024 | 1 articles | Viewed by 892 | Submission Open
Keywords: modified gravity; dark energy parameterizations; holographic models and emergent gravity; inhomogeneous and anisotropic models; injection of energy in the early universe; dark bosons; dark radiation and dark matter models; machine learning and inference methods; new observational facilities
(This special issue belongs to the Section Cosmology)
Quantum Field Theory in Curved Spacetime and Its Implications for Cosmology, Blackholes and Quantum Gravity submission deadline 22 Aug 2024 | 6 articles | Viewed by 7109 | Submission Open
Keywords: quantum field theory in curved spacetime; quantum gravity; blackholes; cosmology
(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)
A Multimessenger View of Supermassive Black Holes and the Quasar Main Sequence submission deadline 31 Aug 2024 | 6 articles | Viewed by 8078 | Submission Open
Keywords: quasars; active galactic nuclei; supermassive black holes; quasar main sequence
(This special issue belongs to the Section Galaxies and Clusters)
X-ray Astronomy Steps into the 21st Century: Chandra and XMM-Newton at 25
edited by
submission deadline 31 Aug 2024 | Viewed by 84 | Submission Open
Keywords: X-ray astrophysics; high-resolution X-ray imaging; diffraction grating X-ray spectroscopy; active galaxies; X-ray binaries; supernova remnants; normal galaxies; galaxy clusters
(This special issue belongs to the Section Space Science)
Particle Physics and Cosmology: A Themed Issue in Honor of Professor Dimitri Nanopoulos
edited by , , Tianjun Li and Natsumi Nagata
submission deadline 1 Sep 2024 | 1 articles | Viewed by 735 | Submission Open
Keywords: particle physics; supersymmetry; grand unified theory; string model building; cosmology
Neutrino Insights: Peering into the Subatomic Universe
edited by Guillermo D. Megias
submission deadline 15 Sep 2024 | Viewed by 73 | Submission Open
Keywords: neutrino physics; neutrino oscillations; electroweak interactions; CP violation; solar and atmospheric neutrinos; long-baseline accelerators; neutrino-nucleus reactions; low and high energy neutrinos
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Newest Results in Gravitational Waves and Machine Learning
edited by , and Zhixiang Ren
submission deadline 30 Sep 2024 | 4 articles | Viewed by 4717 | Submission Open
Keywords: gravitational wave; artificial intelligence; machine learning; coalescence of binary compact objects; supernova; glitch classification; Einstein equation; numerical relativity; quantum gravity
(This special issue belongs to the Section Gravitation)
Comets: Tracers of Solar System Formation and Evolution—Celebrating the 20th Anniversary of Rosetta Mission Launch
edited by
submission deadline 30 Sep 2024 | 1 articles | Viewed by 1694 | Submission Open
Keywords: comets; protoplanetary disks; space missions/Rosetta; planetary formation; dust and pebble dynamics; cometary ices
(This special issue belongs to the Section Planetary Sciences)
Dark Energy and Dark Matter
edited by Yan Gong
submission deadline 30 Sep 2024 | 1 articles | Viewed by 1670 | Submission Open
Keywords: dark energy; dark matter; modified gravity; theoretical model; cosmic acceleration; cosmic large-scale structure; gravitational lensing; galaxy clustering; intensity mapping; cosmological constraint
(This special issue belongs to the Section Cosmology)
Planetary Radar Astronomy
edited by and Yan Su
submission deadline 30 Sep 2024 | 1 articles | Viewed by 1607 | Submission Open
Keywords: radar astronomy; lunar and planetary science; lunar and planetary radar detection; lunar and deep space exploration; radar observations of planets within the solar system; radar observations of planets and stars outside the solar system; Chang’ e-3/-4/-5; Tianwen-1 mission and perseverance rover mission
(This special issue belongs to the Section Planetary Sciences)
Ultra-High-Energy Cosmic Rays
edited by Haoning He
submission deadline 30 Sep 2024 | Viewed by 178 | Submission Open
Keywords: high energy neutrino; high energy gamma-ray; ultra-high-energy cosmic rays; particle acceleration; hadronic interactions; anisotropy; composition; multi-messenger astronomy; magnetic fields; Gamma-Ray Bursts (GRBs); galaxy clusters; Active Galactic Nuclei (AGN); Tidal Disruption Events (TDEs); radio galaxies; starburst galaxies; pulsars
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
A Multiwavelength View of Supernovae
edited by
submission deadline 30 Sep 2024 | Viewed by 158 | Submission Open
Keywords: supernovae; core collapse; type Ia; binaries; evolution; circumstellar interactions; emission processes; thermal and non-thermal emission
(This special issue belongs to the Section Stellar Astronomy)
Neutrino Masses and Oscillations
edited by Wenjie Wu and Qinrui Liu
submission deadline 30 Sep 2024 | Viewed by 65 | Submission Open
Keywords: neutrino oscillation; neutrino mixing; neutrino mass ordering; CP violation; reactor neutrinos; atmospheric neutrinos; accelerator neutrinos; solar neutrinos; sterile neutrinos
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Jet and Heavy Flavor Production submission deadline 31 Oct 2024 | 3 articles | Viewed by 3465 | Submission Open
Keywords: ultra-relativistic heavy ion collisions; quark gluon plasma; jet production; heavy flavour production; transverse energy; small systems
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Universe: Feature Papers 2024—"Galaxies and Clusters"
edited by
submission deadline 31 Oct 2024 | 2 articles | Viewed by 2114 | Submission Open
Keywords: galaxies and clusters; galaxy formation and evolution; the structure of galaxies; dwarf galaxies; star formation in galaxies; galaxy clustering; the halo of galaxies; galaxy satellites; dark matter in galaxies; lensing of galaxies; deep surface brightness images; galaxy counts; machine learning and artificial intelligence for galaxy/cluster analysis
(This special issue belongs to the Section Galaxies and Clusters)
Search for New Physics at the LHC and Future Colliders
edited by and
submission deadline 31 Oct 2024 | 1 articles | Viewed by 1592 | Submission Open
Keywords: beyond standard model physics; Large Hadron Collider; future proton-proton; electron-positron; electron-proton colliders; collider experiments; collider phenomenology; new techniques for collider physics; new physics in Flavor physics; new physics in Pb-Pb collisions; new physics related to Higgs bosons; high-order calculations in QFT related to new physics at colliders
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Universe: Feature Papers 2024 – Compact Objects
edited by
submission deadline 31 Oct 2024 | 2 articles | Viewed by 1222 | Submission Open
Keywords: compact object; neutron star; pulsar; magnetar; white dwarf; black hole; X-ray binary
(This special issue belongs to the Section Compact Objects)
Universe: Feature Papers 2024—'Cosmology' submission deadline 31 Oct 2024 | Viewed by 90 | Submission Open
Keywords: cosmological models; quantum cosmology; dark matter and dark energy; cosmic acceleration; cosmological constants; cosmological perturbation theory; cosmic microwave background (CMB); observational cosmology
(This special issue belongs to the Section Cosmology)
Current Trends in Neutrino Oscillation Physics: A Phenomenological and Experimental Perspective
edited by and Budimir Kliček
submission deadline 31 Oct 2024 | Viewed by 72 | Submission Open
Keywords: neutrino oscillation; three flavour oscillation; beyond three flavour oscillation; models for neutrino mass and mixing; neutrino experiments; neutrino detectors; neutrino interactions
Measurements, Observations and Theoretical Studies on the Solar Magnetic Field—Celebrating the 40th Anniversary of the Huairou Solar Observing Station
edited by , Mei Zhang, Junfeng Hou, Jiaben Lin and
submission deadline 30 Nov 2024 | Viewed by 296 | Submission Open
Keywords: solar magnetic field; solar polarimetry; multi-wavelength diagnostic; topology analysis; astroinformatics; MHD; solar dynamo; space weather forecasting; solar historical data; space projects
(This special issue belongs to the Section Solar System)
Studying Astrophysics with High Energy Cosmic-Particles
edited by Kinwah Wu and
submission deadline 30 Nov 2024 | Viewed by 246 | Submission Open
(This special issue belongs to the Section Cosmology)
Origins and Natures of Inflation, Dark Matter and Dark Energy, 2nd Edition
edited by
submission deadline 30 Nov 2024 | Viewed by 130 | Submission Open
Keywords: inflation; dark matter; dark energy; alternative theory of gravity; cosmology; physics in the early universe; cosmological perturbation theory; cosmic microwave background radiation; gravitational waves; large-scale structure of the universe
(This special issue belongs to the Section Cosmology)
Universe: Feature Papers 2024—Space Science
edited by
submission deadline 30 Nov 2024 | Viewed by 93 | Submission Open
Keywords: space mission/instrument/telescope concepts; inflight/in preparation space instrument; instrument performance evaluation; detectors technologies and perspectives; imaging and timing techniques and methods; spectroscopy and polarimetry techniques and methods; observational and analysis techniques and methods; cosmic ray sources emission models; methods for observing gravitational waves and counterparts at other frequencies (from radio to gamma); methods and techniques for planetary (solar and extrasolar) science and exploration; space technology and biomedicine; environmental science; telecommunications; materials science
(This special issue belongs to the Section Space Science)
Challenges and Synergies with Future Gravitational Wave Observatories
edited by Vetrugno Daniele and Riccardo Buscicchio
submission deadline 30 Nov 2024 | Viewed by 78 | Submission Open
Keywords: gravitational waves; LISA; ET; einstein telescope; cosmic explorer; global fit; stochastic gravitational waves background; multifrequency GW observation; GW observatories synergies; GW data analysis
(This special issue belongs to the Section Astroinformatics and Astrostatistics)
keV Warm Dark Matter (ΛWDM) in Agreement with Observations in Tribute to Héctor J. de Vega (2nd Edition)
edited by
submission deadline 30 Nov 2024 | Viewed by 76 | Submission Open
Keywords: keV warm dark matter; keV warm dark matter theory; constraints; and observations; keV warm dark matter galaxies; keV warm dark matter supermassive black holes; keV warm dark matter particles; keV warm dark matter (direct and indirect) detection; neutrinos and sterile neutrinos; dark matter production models; direct and indirect searches
(This special issue belongs to the Section Gravitation)
Recent Advances in Gravitational Lensing and Galactic Dynamics submission deadline 30 Nov 2024 | Viewed by 30 | Submission Open
Keywords: gravitational lensing; weak lensing; astrophysics of black holes and neutron stars; gravitational waves; astrophysical tests of general relativity; relativistic astrophysics; galactic dynamics; JWST; EHT; and Euclid observations; exoplanets
(This special issue belongs to the Section Gravitation)
Multi-wavelength Properties of Active Galactic Nuclei
edited by
submission deadline 15 Dec 2024 | Viewed by 59 | Submission Open
Keywords: active galactic nuclei; black-hole physics; accretion; winds; jets; emission mechanism; theoretical modelling; observing facilities; software and databases
(This special issue belongs to the Section Galaxies and Clusters)
Primordial Black Holes from Inflation
edited by
submission deadline 31 Dec 2024 | 5 articles | Viewed by 15706 | Submission Open
Keywords: primordial black holes  ; inflation  ; statistics  ; gravitational collapse
(This special issue belongs to the Section Compact Objects)
Cosmic Rays and Dark Matter Detection
edited by , and Sami Caroff
submission deadline 31 Dec 2024 | 1 articles | Viewed by 1458 | Submission Open
Keywords: cosmic ray; dark matter; photons; neutrino; axion; black hole; WIMP; astroparticle; solar modulation; Cerenkov detectors
(This special issue belongs to the Section Space Science)
Exotic Scenarios for Compact Astrophysical Objects
edited by , and Martin Veselsky
submission deadline 31 Dec 2024 | 1 articles | Viewed by 1402 | Submission Open
Keywords: compacts objects; neutron stars; hybrid stars; strange quark stars; boson stars; white dwarfs; dark objects
(This special issue belongs to the Section Compact Objects)
The Local Group in Multi-Dimensions submission deadline 31 Dec 2024 | Viewed by 283 | Submission Open
Keywords: local group; resolved stellar populations; galaxy evolution; galaxy groups; Milky Way; M31; dwarf galaxies
(This special issue belongs to the Section Galaxies and Clusters)
New Results from Gravitational Wave Detectors
edited by Mengyao Wang and
submission deadline 31 Dec 2024 | Viewed by 47 | Submission Open
Keywords: gravitational wave; instrumentation; detector designs and techniques
(This special issue belongs to the Section Compact Objects)
Exploring Low-Frequency Gravitational Wave Sources: Waveforms, Detection and Sciences
edited by Wenbiao Han, Ziren Luo and Shucheng Yang
submission deadline 31 Dec 2024 | Viewed by 47 | Submission Open
Keywords: gravitational waves; black holes; tests of theories of gravity; machine learning; data analysis
(This special issue belongs to the Section Gravitation)
Quantum Field Theory, 2nd Edition
edited by
submission deadline 28 Feb 2025 | 1 articles | Viewed by 976 | Submission Open
Keywords: ultralight axions; Peccei– Quinn at finite temperature; spectral densities; mixing of Yang– Mills theories; electroweak symmetry breaking; coarse-graining of Euclidean field theory gradient flow cooling
(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)
Studies of Hadron Spectroscopy at the future Electron-Hadron and Electron-Ion Colliders
edited by Vladimir Vladimir Khachatryan
submission deadline 15 Apr 2025 | Viewed by 51 | Submission Open
Keywords: quantum chromodynamics; electron scattering; electron-hadron colliders; hadron spectroscopy; conventional & non-conventional hadronic states; photo & electroproduction processes; exclusive & inclusive processes; fragmentation & hadronization
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
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