Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Schwarzschild Radius and Event Horizon

Schwarzschild Radius and Event Horizon

No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape velocity with the...

Detection of Black Holes

Detection of Black Holes

Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...

Gravitation Between Spherically Symmetric Masses

Gravitation Between Spherically Symmetric Masses

The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.

Reduced Mass Coordinates: Isolated Two-body Problem

Reduced Mass Coordinates: Isolated Two-body Problem

In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...

Energy Diagrams - II

Energy Diagrams - II

Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The slope...

Dual Nature of Electromagnetic (EM) Radiation

Dual Nature of Electromagnetic (EM) Radiation

Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Stochastic Siren: Astrophysical Gravitational-Wave Background Measurements of the Hubble Constant.

Physical review letters·2026

Same author

Frontal Lobe Thermal Injury Mimicking Cerebritis on Imaging.

Journal of burn care & research : official publication of the American Burn Association·2025

Same author

Complement Modulation Mitigates Inflammation-Mediated Preterm Birth and Fetal Neural Inflammation.

Cells·2025

Same author

Innovations in Diabetes Management for Pregnant Women: Artificial Intelligence and the Internet of Medical Things.

American journal of perinatology·2024

Same author

The Impact of Pregestational Diabetes on Maternal Morbidity and Mortality: Trends, Challenges, and Future Directions.

American journal of perinatology·2024

Same author

Regional differences in autism and intellectual disability risk associated with cesarean section delivery.

Autism research : official journal of the International Society for Autism Research·2024

Search research articles

Related Experiment Video

Updated: Jul 3, 2026

Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Beyond two dark energy parameters.

Devdeep Sarkar¹, Scott Sullivan, Shahab Joudaki

¹Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.

Physical Review Letters

|July 23, 2008

Summary

This summary is machine-generated.

This study introduces a flexible, multiparameter approach to understanding dark energy, moving beyond the traditional two-parameter model. Next-generation surveys will significantly improve constraints on dark energy

More Related Videos

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Published on: September 8, 2023

Related Experiment Videos

Last Updated: Jul 3, 2026

Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Polarization-Sensitive Two-Photon Microscopy for a Label-Free Amyloid Structural Characterization

Published on: September 8, 2023

Area of Science:

Cosmology
Astrophysics
Particle Physics

Background:

Current models of dark energy rely on a two-parameter equation of state.
These models often assume ad hoc functional forms, limiting their flexibility.
This approach restricts our understanding to only two independent parameters.

Purpose of the Study:

To propose a model-independent, multiparameter approach for analyzing dark energy.
To demonstrate the capability of next-generation surveys in constraining dark energy.
To enable a more comprehensive understanding of dark energy beyond current limitations.

Main Methods:

Developed a multiparameter fitting approach for dark energy.
Utilized simulations for next-generation cosmological surveys.
Analyzed the equation of state of dark energy across multiple redshift bins.

Main Results:

Next-generation surveys will constrain the dark energy equation of state to better than 10% accuracy.
The proposed method allows for constraints in three or more independent redshift bins.
This surpasses the limitations of current two-parameter models.

Conclusions:

A multiparameter, model-independent approach is crucial for advancing dark energy research.
Future cosmological surveys will provide unprecedented precision in characterizing dark energy.
This flexible framework will enhance the analysis of current and future observational data.