Quasibound states of scalar fields in the consistent 4D Einstein–Gauss–Bonnet–(Anti-)de Sitter gravity

Autor: H. S. Vieira, V. B. Bezerra, C. R. Muniz, M. S. Cunha

Publikováno v: European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-22 (2022)

Abstract We examine the interaction between massless scalar fields and the gravitational field generated by a black hole solution that was recently obtained in the consistent well-defined 4-dimensional Einstein–Gauss–Bonnet gravity with a cosmolo

Externí odkaz: https://doaj.org/article/8df81aafe667491fb8d0948186eeff8c

Thermal Casimir effect in Kerr spacetime with quintessence and massive gravitons

Autor: V. B. Bezerra, H. R. Christiansen, M. S. Cunha, C. R. Muniz, M. O. Tahim

Publikováno v: European Physical Journal C: Particles and Fields, Vol 77, Iss 11, Pp 1-7 (2017)

Abstract Starting from an analytical expression for the Helmholtz free energy we calculate the thermal corrections to the Casimir energy density and entropy within nearby ideal parallel plates in the vacuum of a massless scalar field. Our framework i

Externí odkaz: https://doaj.org/article/42f5da2021884ec9a4b88e565bec31fd

FRA–A new fast, robust, and automated pipeline for the detection and measurement of solar‐like oscillations in time‐series photometry of red‐giant stars

Autor: Charlotte Gehan, T. L. Campante, M. S. Cunha, F. Pereira

Publikováno v: Astronomische Nachrichten.

We developed, tested and validated a new Fast, Robust and Automated (FRA) tool to detect solar-like oscillations. FRA is based on the detection and measurement of the frequency of maximum oscillation power $\nu_{max}$, without relying on the detectio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5395232205e977eecfcd19c01318489
https://doi.org/10.1002/asna.20220090

On using dipolar modes to constrain the helium glitch in red giant stars

Autor: G Dréau, P. P. Avelino, M. S. Cunha, M. Vrard

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 497 (1), pp.1008-1014. ⟨10.1093/mnras/staa1981⟩

The space-borne missions CoRoT and Kepler have revealed numerous mixed modes in red-giant stars. These modes carry a wealth of information about red-giant cores, but are of limited use when constraining rapid structural variations in their envelopes.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3f3a902bebc8b7dcc852f470a39b9ce
https://doi.org/10.1093/mnras/staa1981

On quantum traversability of wormholes

Autor: J. Furtado, C. R. Muniz, M. S. Cunha, J. E. G. Silva

In this paper we study the possibility of non-relativistic quantum particles to traverse the generalized Ellis-Bronnikov wormholes by considering quantum effects, such as tunneling. We have used the generalized Ellis-Bronnikov wormhole metric and fou

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9a6bc593d6d5fe3bf0967d9e87415be