Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey

Abstract

We present constraints on the dark energy equation-of-state parameter, w=P/(rho c^2), using 60 Type Ia supernovae (SNe Ia) from the ESSENCE supernova survey. We derive a set of constraints on the nature of the dark energy assuming a flat Universe. By including constraints on (Omega_M, w) from baryon acoustic oscillations, we obtain a value for a static equation-of-state parameter w=-1.05^{+0.13}_{-0.12} (stat; 1 sigma) +- 0.11 (sys) and Omega_M=0.274^{+0.033}_{-0.020} (stat; 1 sigma) with a best-fit chi^2/DoF of 0.96. These results are consistent with those reported by the SuperNova Legacy Survey in a similar program measuring supernova distances and redshifts. We evaluate sources of systematic error that afflict supernova observations and present Monte Carlo simulations that explore these effects. Currently, the largest systematic currently with the potential to affect our measurements is the treatment of extinction due to dust in the supernova host galaxies. Combining our set of ESSENCE SNe Ia with the SuperNova Legacy Survey SNe Ia, we obtain a joint constraint of w=-1.07^{+0.09}_{-0.09} (stat; 1 sigma) +- 0.12 (sys), Omega_M=0.267^{+0.028}_{-0.018} (stat; 1 sigma) with a best-fit chi^2/DoF of 0.91. The current SN Ia data are fully consistent with a cosmological constant.

Submitted to ApJ. 82 pages. 9 figures. 10 tables. Companion paper to Miknaitis et al (2007). Electronic tables and probability surfaces available at http://www.ctio.noao.edu/essence/wresults

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• Lensing and Supernovae: Quantifying The Bias on the Dark Energy Equation of State
• Tachyon cosmology, supernovae data and the Big Brake singularity
• Evolution of Oscillating Scalar Fields as Dark Energy
• The slow roll condition and the amplitude of the primordial spectrum of cosmic fluctuations: Contrasts and similarities of standard account and the "collapse scheme"
• Phantom-Like Behavior in $f(R)$-Gravity
• Conformally Friedmann-Lemaitre-Robertson-Walker cosmologies
• Tension in the Recent Type Ia Supernovae Datasets
• The thawing dark energy dynamics: Can we detect it?
• 3-loop Yang-Mills Condensate Dark Energy Model And Its Cosmological Constraints
• Testing the Distance-Duality Relation with a Combination of Cosmological Distance Observations
• The Hubble Space Telescope Cluster Supernova Survey: III. Correlated Properties of Type Ia Supernovae and Their Hosts at 0.9 < z < 1.46
• Measuring dark energy spatial inhomogeneity with supernova data
• Fuzzy Supernova Templates I: Classification
• Dark Energy from Brane-world Gravity
• The signature of dark energy perturbations in galaxy cluster surveys
• Astronomical Distance Determination in the Space Age. Secondary distance indicators
• A parametrization for the growth index of linear matter perturbations
• Using a phenomenological model to test the coincidence problem of dark energy
• Type Ia Supernova Colors and Ejecta Velocities: Hierarchical Bayesian Regression with Non-Gaussian Distributions
• Bounce cosmology in $f(\mathcal{R})$ gravity
• Type Ia Supernovae Rates and Galaxy Clustering from the CFHT Supernova Legacy Survey
• Perturbations of SNe Ia lightcurves, colors and spectral features by circumstellar dust
• Cosmic Core-Collapse Supernovae from Upcoming Sky Surveys
• A new perspective on the relation between dark energy perturbations and the late-time ISW effect
• Constraining the evolution of dark energy with type Ia supernovae and gamma-ray bursts
• Sub-percent Photometry: Faint DA White Dwarf Spectophotometric Standards for Astrophysical Observatories
• Fast full N-body simulations of generic modified gravity: conformal coupling models
• Supernovae as seen by off-center observers in a local void
• Constraints on $w_0$ and $w_a$ of Dark Energy from High Redshift Gamma Ray Bursts
• Dynamics of holographic vacuum energy in the DGP model
• Supernova tests of the timescape cosmology
• Cosmological perturbations in SFT inspired non-local scalar field models
• Cosmic age, Statefinder and $Om$ diagnostics in the decaying vacuum cosmology
• Beyond Two Dark Energy Parameters
• Comparison of Recent SnIa datasets
• Testing gaussianity, homogeneity and isotropy with the cosmic microwave background
• Observational constraints on cosmic neutrinos and dark energy revisited
• Cosmological Constraints from calibrated Yonetoku and Amati relation implies Fundamental plane of Gamma-ray bursts
• Residual Hubble-bubble effects on supernova cosmology
• Hybrid natural inflation from non Abelian discrete symmetry
• Gravitational lensing in the Supernova Legacy Survey (SNLS)
• Thermonuclear explosions of rapidly rotating white dwarfs - I. Deflagrations
• Coupled quintessence and vacuum decay
• Bright High z SnIa: A Challenge for LCDM?
• Cosmic opacity: cosmological-model-independent tests from gravitational waves and Type Ia Supernova
• How strong is the evidence for accelerated expansion?
• The growth factor of matter perturbations in an f(R) gravity
• Localization of nonlocal cosmological models with quadratic potentials in the case of double roots
• Multiple kinetic k-essence, phantom barrier crossing and stability
• Induced cosmological constant and other features of asymmetric brane embedding
• Structure Formation and Backreaction in Growing Neutrino Quintessence
• Cosmography: Extracting the Hubble series from the supernova data
• Cosmological Studies with Radio Galaxies and Supernovae
• Polytropic dark matter flows illuminate dark energy and accelerated expansion
• Phase space analysis of quintessence fields trapped in a Randall-Sundrum braneworld: a refined study
• The solution of the cosmological constant problem from the inhomogeneous equation of state - a hint from modified gravity?
• Fast full $N$-body simulations of generic modified gravity: derivative coupling models
• Signatures of clumpy dark matter in the global 21 cm background signal
• Tolman IV fluid sphere in f(R, T) gravity
• Analysis of scalar perturbations in cosmological models with a non-local scalar field
• Measurement of marked correlation functions in SDSS-III Baryon Oscillation Spectroscopic Survey using LOWZ galaxies in Data Release 12
• Probing thermonuclear supernova explosions with neutrinos
• Forecasting neutrino masses from combining KATRIN and the CMB: Frequentist and Bayesian analyses
• Dark radiation as a signature of dark energy
• Energy conditions bounds and their confrontation with supernovae data
• Including Absorption in Gordon's Optical Metric
• Hybrid Natural Low Scale Inflation
• Gravitational waves in the presence of a cosmological constant
• Two Component Model of Dark Energy
• SweetSpot: Near-Infrared Observations of Thirteen Type Ia Supernovae from a New NOAO Survey Probing the Nearby Smooth Hubble Flow
• Steve: A hierarchical Bayesian model for Supernova Cosmology
• Interacting cosmic fluids in power-law Friedmann-Robertson-Walker cosmological models
• Will the tachyonic Universe survive the Big Brake?
• Slow-roll freezing quintessence
• Cosmic acceleration in non-canonical scalar field model - An interacting scenario
• Is dark energy an effect of averaging?
• Light curves of five type Ia supernovae at intermediate redshift
• Dark Energy and Dark Matter unification via superfluid Chaplygin gas
• The effects of varying colour-luminosity relations on supernova science
• Superpotential method for chiral cosmological models connected with modified gravity
• Model- and calibration-independent test of cosmic acceleration
• WMAP5 and the Cluster Mass Function
• The Three Faces of Omega_m: Testing Gravity with Low and High Redshift SN Ia Surveys
• Dark energy and cosmic curvature: Monte-Carlo Markov Chain approach
• Assisted dark energy
• Supernovae and Cosmology
• Testing nonstandard cosmological models with SNLS3 supernova data and other cosmological probes
• Dark-Energy Dynamics Required to Solve the Cosmic Coincidence
• Gravitational energy and cosmic acceleration
• The prospects for constraining dark energy with future X-ray cluster gas mass fraction measurements
• Quasinormal modes of black holes absorbing dark energy
• Null Energy Condition Violation and Classical Stability in the Bianchi I Metric
• A cosmological independent calibration of the Ep,i-Eiso correlation for Gamma Ray Bursts
• Grand Rip and Grand Bang/Crunch cosmological singularities
• Holographic Dark Energy from a Modified GBIG Scenario
• Dynamical Systems analysis of an interacting dark energy model in the Brane Scenario
• Cosmology with Photometric Surveys of Type Ia Supernovae
• An Interacting model of Dark Energy in Brans-Dicke theory
• Spectral properties of Type Ia supernovae up to z~0.3
• Noether symmetry for Gauss-Bonnet dilatonic gravity
• Model-independent determination of the cosmic expansion rate. I. Application to type-Ia supernovae
• Model-Independent Reconstruction of the Expansion History of the Universe from Type Ia Supernovae
• The WiggleZ Dark Energy Survey: small-scale clustering of Lyman Break Galaxies at z < 1
• The Influence of Galaxy Formation Physics on Weak Lensing Tests of General Relativity
• Revised Supernova Rates from the IfA Deep Survey
• Observational Constraints on Interacting Dark Matter Model Without Dark Energy
• On the impact of intergalactic dust on cosmology with type Ia supernovae
• Gamma-ray burst contributions to constraining the evolution of dark energy
• First Results from the La Silla-QUEST Supernova Survey and the Carnegie Supernova Project
• Understanding the origin of CMB constraints on Dark Energy
• Reconstruction of interaction rate in Holographic dark energy model with Hubble horizon as the infrared cut-off
• Modified GBIG Scenario as an Alternative for Dark Energy
• Single-Field Inflation After WMAP5
• Dark Energy Accretion onto a Black Hole in an Expanding Universe
• Constraints on oscillating dark energy models
• Dark Energy: The Shadowy Reflection of Dark Matter?
• The Accelerating Universe
• The GRBs Hubble diagram in quintessential cosmological models
• A conventional approach to the dark-energy concept
• Cosmic strings interacting with dark strings
• Dynamics and constraints of the Unified Dark Matter flat cosmologies
• Oscillating universe in the DGP braneworld
• SNIa Host Galaxy Properties and the Dust Extinction Distribution
• Cosmography and large scale structure by f(R) gravity: new results
• In Pursuit of LSST Science Requirements: A Comparison of Photometry Algorithms
• Light Curves of 213 Type Ia Supernovae from the ESSENCE Survey
• High Amplitude δ-Scutis in the Large Magellanic Cloud
• Application of Bayesian graphs to SN Ia data analysis and compression
• The 1999aa-like Type Ia Supernova iPTF14bdn in the Ultraviolet and Optical
• A comprehensive parametrization approach for the Hubble parameter in scalar field dark energy models
• Parameterizing and Measuring Dark Energy Trajectories from Late-Inflatons
• Light curve studies of nearby Type Ia Supernovae with a Multi-band Stretch method
• {\it Gauging} the cosmic acceleration with recent type Ia supernovae data sets
• Dark Energy and Dark Matter in General Relativity with local scale invariance
• Consistency of LCDM with Geometric and Dynamical Probes
• Cosmological Constant and Local Gravity
• Consistency Test of Dark Energy Models
• Casimir Energy and Brane Stability
• Planck-PR4 anisotropy spectra show (better) consistency with General Relativity
• The effect of dark strings on semilocal strings
• Host Galaxy Spectra and Consequences for SN Typing From The SDSS SN Survey
• Subaru FOCAS Spectroscopic Observations of High-Redshift Supernovae
• Tomography from the Next Generation of Cosmic Shear Experiments for Viable f(R) Models
• Confronting Tracker Field Quintessence with Data
• Testing the mutual consistency of different supernovae surveys
• Distance-redshift from an optical metric that includes absorption
• The Type Ia supernovae rate with Subaru/XMM-Newton Deep Survey
• Host Galaxy Extinction of SNIa: Co-evolution of ISM Structure and Extinction Law with Star-Formation
• Pre-discovery and Follow-up Observations of the Nearby SN 2009nr: Implications for Prompt Type Ia SNe
• The influence of Red Spiral Galaxies on the Shape of the Local K-Band Luminosity Function
• Utilizing Type Ia Supernovae in a Large, Fast, Imaging Survey to Constrain Dark Energy
• Study of parametrized dark energy models with a general non-canonical scalar field
• Statefinder diagnostic in a torsion cosmology
• Reconstructing Cosmological Matter Perturbations using Standard Candles and Rulers
• Type Ia supernova parameter estimation: a comparison of two approaches using current datasets
• Comparison of cosmological models using standard rulers and candles
• Constraints on the physical properties of Type Ia supernovae from photometry
• Energy conditions bounds and supernovae data
• Probing Dark Energy Inhomogeneities with Supernovae
• Prospects and pitfalls of gravitational lensing in large supernova surveys
• Constraining dark energy via baryon acoustic oscillations in the (an)isotropic light-cone power spectrum
• From model dynamics to oscillating dark energy parameterisation
• Delta-gravity and Dark Energy
• Conformal Cosmological Model Parameters with Distant SNe Ia Data: "gold" and "silver"
• Time-Varying Dark Energy Constraints From the Latest SN Ia, BAO and SGL
• Limitations of Bayesian Evidence Applied to Cosmology
• PHotometry Assisted Spectral Extraction (PHASE) and identification of SNLS supernovae
• The First Data Release from SweetSpot: 74 Supernovae in 36 Nights on WIYN+WHIRC
• Absolute Distances to Nearby Type Ia Supernovae via Light Curve Fitting Methods
• Dynamics and Constraints of the Massive Gravitons Dark Matter Flat Cosmologies
• Dark Matter from the Inflaton Field
• The zenithal 4-m International Liquid Mirror Telescope: a unique facility for supernova studies
• Observational constraints to a phenomenological $f\left(R,\nabla R\right)$-model
• Distance Probes of Dark Energy
• Precision measurements of large scale structure with future type Ia supernova surveys
• Supernovae and Gaia
• Comparative Analysis of Peculiar Type Ia 1991bg-like Supernovae Spectra
• Dynamical 3-Space: A Review
• Rest-Frame R-band Lightcurve of a z~1.3 Supernova Obtained with Keck Laser Adaptive Optics
• Investigating the relationship between cosmic curvature and dark energy models with the latest supernova sample
• Late-Onset Circumstellar Medium Interactions are Rare: An Unbiased GALEX View of Type Ia Supernovae
• Constraints on Dark Energy Models Using Late Universe Probes
• Observational Evidence for Negative-Energy Dust in Late-Times Cosmology
• Cosmological constraints on unifying Dark Fluid models
• Is there a standard measuring rod in the Universe?
• Probing the course of cosmic expansion with a combination of observational data
• Coupled quintessence with a possible transient accelerating phase
• Initial directional singularity in inflationary models
• Correcting for peculiar velocities of Type Ia Supernovae in clusters of galaxies
• Cosmological constraints from low-redshift data
• SNe Ia as a cosmological probe
• Improving Dark Energy Constraints with High Redshift Type Ia Supernovae from CANDELS and CLASH
• BDM Dark Matter: CDM with a core profile and a free streaming scale
• Implications of Two Type Ia Supernova Populations for Cosmological Measurements
• Hybrid dark energy
• Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models
• A Precise Photometric Ratio via Laser Excitation of the Sodium Layer II: Two-photon Excitation Using Lasers Detuned from 589.16 nm and 819.71 nm Resonances
• The ESO's VLT Type Ia supernova spectral set of the final two years of SNLS
• Inference for the dark energy equation of state using Type IA supernova data
• Observational Constraints on the Normal Branch of a Warped DGP Cosmology
• The dark side of curvature
• Cosmology With A Dark Refraction Index
• Inclusive Constraints on Unified Dark Matter Models from Future Large-Scale Surveys
• Quasiattractor in models of new and chaotic inflation
• Unravelling the Dark Matter - Dark Energy Paradigm
• Like vs. Like: Strategy and Improvements in Supernova Cosmology Systematics
• Confronting the sound speed of dark energy with future cluster surveys
• A Precise Photometric Ratio via Laser Excitation of the Sodium Layer I: One-photon Excitation Using 342.78 nm Light
• Constraints on the Phase Plane of the Dark Energy Equation of State
• Projected distances to host galaxy reduce SNIa dispersion
• The $k$-essence scalar field in the context of Supernova Ia Observations
• Consistency of nonlinear interacting ghost dark energy with recent observations
• Reconstructing the interaction between the dark matter and holographic dark energy
• OpenUniverse2024: A shared, simulated view of the sky for the next generation of cosmological surveys
• A Precision Photometric Comparison between SDSS-II and CSP Type Ia Supernova Data
• Equivalence Principle (EP) and Solar System Constraints on $R(1\pm \epsilon \ln (\frac{R}{R_c}))$ model of Gravity
• Evolution of Spherical Overdensity in Thawing Dark energy Models
• Prospects in Constraining the Dark Energy Potential
• Reducing the gravitational lensing scatter of Type Ia supernovae without introducing any extra bias
• Alternative High-z Cosmic Tracers and the Dark Energy Equation of State
• A Quantum Cosmology: No Dark Matter, Dark Energy nor Accelerating Universe
• UV Properties of Type Ia Supernova and their Host Galaxies
• Designing Future Dark Energy Space Missions: II. Photometric Redshift of Space Weak Lensing Optimized Survey
• Non-existence of Extended Holographic Dark Energy with Hubble Horizon
• Crossing the Phantom Divide in Extended Dvali-Gabadadze-Porrati Gravity
• Halting eternal acceleration with an effective negative cosmological constant
• Neutrino Dark Energy With More Than One Neutrino Species
• Cosmological dynamics of a non-minimally coupled bulk scalar field in DGP setup
• Near-infrared K corrections of Type Ia Supernovae and their errors
• Decaying dark matter mimicking time-varying dark energy
• Implications of JLA data for $k-$essence model of dark energy with given equation of state
• Evidence of dark energy in different cosmological observations
• Modeling and Analyzing Stability of Hybrid Stars within $f(Q)$ Gravity
• Time-dependent diffusive interactions between dark matter and dark energy in the context of $k-$essence cosmology
• Blast From the Past: Constraining Progenitor Models of SN 1972E
• Stability analysis in Modified Non-Local Gravity
• Generalizing thawing dark energy models: the standard vis-à-vis model independent diagnostics
• Reducing Zero-point Systematics in Dark Energy Supernova Experiments
• Constraining Perturbative Early Dark Energy with Current Observations
• Constraining dust and color variations of high-z SNe using NICMOS on Hubble Space Telescope
• X-ray Clusters of Galaxies as Cosmological Tools
• Satellite-Mounted Light Sources as Photometric Calibration Standards for Ground-Based Telescopes
• Comparison of cosmological parameter inference methods applied to supernovae lightcurves fitted with SALT2
• Phantom-Like Behavior of a DGP-Inspired Scalar-Gauss-Bonnet Gravity
• Scalar field exact solutions for non-flat FLRW cosmology: A technique from non-linear Schrödinger-type formulation
• Non-Minimal Quintessence With Nearly Flat Potential
• Phantom-like effects in asymmetric brane embedding with induced gravity and the Gauss-Bonnet term in the Bulk
• Cosmology in Delta-Gravity
• Scalar Field as Dark Energy Accelerating Expansion of the Universe
• Diffusive dark matter and dark energy scenario and $k-$essence in the context of Supernova Ia observations
• Upper Limit on Dimming of Cosmological Sources by Intergalactic Grey Dust from the Soft X-ray Background
• Improved parametrization of the growth index for dark energy and DGP models
• Origin of the Chemical Elements
• Constraints on Dark Energy Models from Weak Gravity Conjecture
• Modelling Time-varying Dark Energy with Constraints from Latest Observations
• The Type Ia Supernova Rate in Radio and Infrared Galaxies from the CFHT Supernova Legacy Survey
• Latest Observational Constraints on Cardassian Models
• Fuzzy Supernova Templates II: Parameter Estimation
• Stress testing the dark energy equation of state imprint on supernova data
• Specific Effect of Peculiar Velocities on Dark-Energy Constraints from Type Ia Supernovae
• Fixing the U-band photometry of Type Ia supernovae
• Reconstructing FHDE with Scalar and Gauge Fields
• Cosmological perturbations in the $\Lambda$CDM-like limit of a polytropic dark matter model
• The discovery and classification of 16 supernovae at high redshifts in ELAIS-S1 - the Stockholm VIMOS Supernova Survey II
• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia
• A minimal set of invariants as a systematic approach to higher order gravity models: Physical and Cosmological Constraints
• Observational constraint on dynamical evolution of dark energy
• What can be learned about dark energy evolution?
• The Cosmology of Asymmetric Brane Modified Gravity
• Tracing the equation of state and the density of cosmological constant along z
• The Universe in a Soap Film
• On the Effective Equation of State of Dark Energy
• The Bianchi type-V Dark Energy Cosmology in Self Interacting Brans Dicke Theory of Gravity
• Dilaton-scalar models in context of generalized affine gravity theories: their properties and integrability
• The Shared Causal Pasts and Futures of Cosmological Events
• Type Ia SNe along redshift: the R(Si II) ratio and the expansion velocities in intermediate z supernovae
• Forecasting Supernova Observations with the CSST: I. Photometric Samples
• Cosmological Model-independent Gamma-ray Bursts Calibration and its Cosmological Constraint to Dark Energy
• Dynamic Dark Energy Equation of State (EoS) and Hubble Constant analysis using type Ia supernovae from Union 2.1 dataset
• Investigation of Bouncing Universe and Phantom Crossing in Modified Gravity Coupled with Weyl Tensor and its Reconstruction
• Statefinder analysis of the superfluid Chaplygin gas model
• Interacting dark energy model in the brane scenario: A Dynamical System Analysis
• Probing the cosmic acceleration from combinations of different data sets
• Local measurement of Λ using pulsar timing arrays
• The Matrix Reloaded - on the Dark Energy Seesaw
• Parameters and pitfalls in dark energy models with time varying equation of state
• Constraining hybrid potential scalar field cosmological model in Lyra's geometry with recent observational data
• Brane cosmology in the Horava-Witten heterotic M-Theory on $S^1/Z_2$
• Statefinders and observational measurement of superenergy
• Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
• The Dependence of the Type Ia Supernova Host Bias on Observation or Fitting Technique
• Cosmological extrapolation of MOND
• Testing the Consistence of Gamma Ray Burst Data-set and Supernovae Union2
• Transient Detection and Classification
• Comparing the light curves of simulated Type Ia Supernovae with observations using data-driven models
• Expressing the equation of state parameter in terms of the three dimensional cosmic shear
• A Scaling Relation in Inhomogeneous Cosmology with k-essence scalar fields
• Observational constraints on a Yang-Mills condensate dark energy model
• Constraints on dark energy evolution
• Schwinger's Magnetic Model of Matter: Can It Help Us With Grand Unification?
• Slow-roll, acceleration, the Big Rip and WKB approximation in NLS-type formulation of scalar field cosmology
• The establishment of the Standard Cosmological Model through observations
• The Friedmann equations in deformed Hořava-Lifshitz gravity and Debye model
• Geometrical constraints on dark energy models
• On the propagation of gravitational waves in a $\Lambda$CDM universe
• Observational Constraints on Phantom Crossing DGP Gravity
• Investigation into Compactified Dimensions: Casimir Energies and Phenomenological Aspects
• On the cosmological viability of the Hu-Sawicki type modified induced gravity
• Equation of state and singularities in FLRW cosmological models
• Can MONDian vector theories explain the cosmic speed up ?
• Measuring $H_0$ with pulsar timing arrays
• Singularities in inflationary cosmological models
• Singular Yamabe metrics and initial data with exactly Kottler-Schwarzschild-de Sitter ends II. Generic metrics
• An Exploration of Heterogeneity in Supernova Type Ia Samples
• The expansion of the universe observed with supernovae
• Incorporating Astrophysical Systematics into a Generalized Likelihood for Cosmology with Type Ia Supernovae
• Data compression of measurements of peculiar velocities of Supernovae Ia
• Coincidence Problem in Cyclic Phantom Models of the Universe
• A New Approach to Testing Dark Energy Models by Observations
• Generation of effective massive Spin-2 fields through spontaneous symmetry breaking of scalar field
• Satellite-Mounted Light Sources as Photometric Calibration Standards
• Decoupling of Higgs boson from the inflationary stage of Universe evolution
• Instruments on large optical telescopes -- A case study
• The Self-Calibrating Hubble Diagram
• From atomic physics, to upper-atmospheric chemistry, to cosmology: A "laser photometric ratio star" to calibrate telescopes at major observatories
• Observational constraints on thawing quintessence scalar field model
• Dynamical 3-Space: Supernovae and the Hubble Expansion - Older Universe and End of Dark Energy
• Dark energy from quantum wave function collapse of dark matter
• The snapshot distance method: estimating the distance to a Type Ia supernova from minimal observations
• Dark energy FRW cosmology - dynamical system reconstruction
• Confronting Einstein Yang Mills Higgs Dark Energy in light of observations
• Modified scaling in $k$-essence model in interacting dark energy - dark matter scenario
• Lower bounds on photometric redshift errors from Type Ia supernovae templates
• Perspectives for studying the dark energy at z>2 with galaxy surveys
• Observations of General Relativity at strong and weak limits
• Cosmological constraints from supernova data set with corrected redshift
• Cosmological bootstrap
• Long-wavelength gravitational waves and cosmic acceleration
• Effect of the cosmological parameters on gravitational waves: general analysis
• $\Lambda$CDM, $\Lambda$DGP and extended phantom-like cosmologies
• Cosmological solutions of Tensor-Vector theories of gravity with varying the space-time-matter coupling constant
• Installing of cosmological constant
• Propagation of gravitational waves in a universe with slowly-changing equation of state
• Machine learning analysis of Photometric data from the Dark Energy Survey
• An extended dust disk in a spiral galaxy; An occulting galaxy pair in ANGST
• Nonlinear matter terms in general scalar-tensor braneworld cosmology
• Agegraphic Model based on the Generalized Uncertainty Principle
• Dynamical analysis of $k$-essence cosmology in the light of Supernova Ia observations