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Special Issue "Dark Energy"
Deadline for manuscript submissions: closed (30 June 2017).
Interests: gravitational astrophysics, general theory of relativity, relativistic astrophysics, physical cosmology, environmental physics, history of astronomy, science education
You are cordially invited to submit papers to the Special Issue Dark Energy, that focuses on understanding the nature of the constituent that causes the accelerated expansion of the Universe.
During the last 20 years, a continuously growing list of observational data has verified the existence of a distributed energy component in the Universe, i.e., one that does not cluster at any scale. Reflecting our ignorance on its exact nature, this new component—which constitutes about two-thirds of the Universe’s mass-energy content—was termed dark energy (DE).
The need for DE was first suggested by high-precision distance measurements, performed with the aid of the supernovae Ia standard candles. Today, there is also evidence from galaxy clusters, the integrated Sachs–Wolfe effect, baryon acoustic oscillations, weak gravitational lensing, gamma ray bursts, the Lyman-α forest, etc. A combination of these data with those from the cosmic microwave background survey has provided evidence for DE at the 5σ confidence level.
Although the notion of DE can be attributed to a non-vanishing cosmological constant, Λ, such a choice fails to explain the magnitude of Λ, with the corresponding theoretical predictions being 10123 times larger than what is observed. As a consequence, many other physically-motivated models have appeared in the literature, including quintessence, phantom cosmology, braneworld scenarios, modified gravity theories, Chaplygin gas, Cardassian cosmology, unified dark matter models, and so on.
As none of these models meets observation at a 100% level, today, the determination of DE’s exact nature is one of the most intriguing challenges of theoretical physics and cosmology.
Dr. N. K. Spyrou
Dr. K. Kleidis
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Entropy is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- dark energy
- accelerating universe
- cosmological constant
- cardassian cosmology
- unified dark matter