Makale detayı · 2011
Constraints on Perturbative f R Gravity via Neutron Stars
- Yıl
- 2011
- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- YÖKSİS dergi adı Journal of Cosmology and Astroparticle Physics
- Katalog eşleşmesi (ISSN) Journal of Cosmology and Astroparticle Physics
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
OpenAlex · İngilizce
We study the structure of neutron stars in perturbative f ( R ) gravity models with realistic equations of state. We obtain mass-radius relations in a gravity model of the form f ( R ) = R +α R 2 . We find that deviations from the results of general relativity, comparable to the variations due to using different equations of state (EoS'), are induced for |α| ∼ 10 9 cm 2 . Some of the soft EoS' that are excluded within the framework of general relativity can be reconciled with the 2 solar mass neutron star recently observed for certain values of α within this range. For some of the EoS' we find that a new solution branch, which allows highly massive neutron stars, exists for values of α greater than a few 10 9 cm 2 . We find constraints on α for a variety of EoS' using the recent observational constraints on the mass-radius relation. These are all 5 orders of magnitude smaller than the recent constraint obtained via Gravity Probe B for this gravity model. The associated length scale cm is only an order of magnitude smaller than the typical radius of a neutron star, the probe used in this test. This implies that real deviations from general relativity can be even smaller.
Konular
Atıflar
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223 atıf
OpenAlex cited_by_count (önbellek / veritabanı)
Yerel katalogda bu makaleye atıf yapan 8 yayın (OpenAlex referans eşleşmesi; tam dünya listesi değildir).
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- What does a measurement of mass and/or radius of a neutron star constrain: Equation of state or gravity? 2014
- What does a measurement of mass and or radius of a neutron star constrain Equation of state or gravity 2014
- Neutron stars in a perturbative f R gravity model with strong magnetic fields 2013
- Absence of Relativistic Stars in f(T) Gravity 2011
- Relativistic stars in Starobinsky gravity with the matched asymptotic expansions method 2017
- Ricci-Determinant gravity: Dynamical aspects and astrophysical implications 2021