Non-extensive thermodynamics and neutron star properties

Autor(es)

Menezes, Debora P. ^[1] ; Deppman, Airton ^[2] ; Megias, Eugenio ^{[3, 4, 5]} ; Castro, Luis B. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Fed Santa Catarina, CFM, Dept Fis, CP 476, BR-88040900 Florianopolis, SC - Brazil

^[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

^[3] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich - Germany

^[4] Univ Autonoma Barcelona, Dept Fis, Grp Fis Teor, E-08193 Barcelona - Spain

^[5] Univ Autonoma Barcelona, Dept Fis, IFAE, E-08193 Barcelona - Spain

^[6] Univ Fed Maranhao, Dept Fis, BR-65080805 Sao Luis, MA - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL A; v. 51, n. 12 DEC 3 2015.
• Citações Web of Science: 11

Resumo

In the present work we apply non-extensive statistics to obtain equations of state suitable to describe stellar matter and verify its effects on microscopic and macroscopic quantities. Two snapshots of the star evolution are considered and the direct Urca process is investigated with two different parameter sets. q-values are chosen as 1.05 and 1.14. The equations of state are only slightly modified, but the effects are enough to produce stars with slightly higher maximum masses. The onsets of the constituents are more strongly affected and the internal stellar temperature decreases with the increase of the q-value, with consequences on the strangeness and cooling rates of the stars. (AU)

• Processo FAPESP: 13/24468-1 - Investigação das propriedades termodinâmicas de sistemas hadrônicos
• Beneficiário: Airton Deppman
• Modalidade de apoio: Auxílio à Pesquisa - Regular