General relativistic effects on the evolution of binary systems.

Rosario Iaria, Tiziana Di Salvo, Natale Robba, Burderi, D'Antona, Fabio D'Antona, Giuseppe Lavagetto

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

When a radio pulsar brakes down due to magnetodipole emission,its gravitational mass decreases accordingly. If the pulsar is hosted in a binary system, this mass loss will Increase the orbital period of the system. We show that this relativistic effect can be indeed observable if the neutron star is fast and magnetized enough and that, if observed, it will help to put tight constraints to the equation of state of ultradense matter. Moreover, in Low Mass X-ray Binaries that evolve towards short periods, the neutron star lights up as a radio pulsar during the "period gap". As the effect we consider contrasts the orbital period decay, the system spends a longer time in this phase. As a consequence, the neutron star can survive this phase only if it is non-supramassive, Since in such bianries similar to 0.84M(circle dot) can be accreted onto the neutron star, short period (P <= 2 h) millisecond Xray pulsars like SAX J1808.4-3658 can be formed only if either a large part of the accreting matter has been ejected from the system, or the equation of state of ultradense matter is very stiff.
Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages116-120
Number of pages5
Publication statusPublished - 2005

Publication series

NameAIP CONFERENCE PROCEEDINGS

Fingerprint

relativistic effects
pulsars
neutron stars
equations of state
orbitals
brakes
luminaires
decay
x rays

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Iaria, R., Di Salvo, T., Robba, N., Burderi, D'Antona, D'Antona, F., & Lavagetto, G. (2005). General relativistic effects on the evolution of binary systems. In AIP Conference Proceedings (pp. 116-120). (AIP CONFERENCE PROCEEDINGS).

General relativistic effects on the evolution of binary systems. / Iaria, Rosario; Di Salvo, Tiziana; Robba, Natale; Burderi; D'Antona; D'Antona, Fabio; Lavagetto, Giuseppe.

AIP Conference Proceedings. 2005. p. 116-120 (AIP CONFERENCE PROCEEDINGS).

Research output: Chapter in Book/Report/Conference proceedingChapter

Iaria, R, Di Salvo, T, Robba, N, Burderi, D'Antona, D'Antona, F & Lavagetto, G 2005, General relativistic effects on the evolution of binary systems. in AIP Conference Proceedings. AIP CONFERENCE PROCEEDINGS, pp. 116-120.
Iaria R, Di Salvo T, Robba N, Burderi, D'Antona, D'Antona F et al. General relativistic effects on the evolution of binary systems. In AIP Conference Proceedings. 2005. p. 116-120. (AIP CONFERENCE PROCEEDINGS).
Iaria, Rosario ; Di Salvo, Tiziana ; Robba, Natale ; Burderi ; D'Antona ; D'Antona, Fabio ; Lavagetto, Giuseppe. / General relativistic effects on the evolution of binary systems. AIP Conference Proceedings. 2005. pp. 116-120 (AIP CONFERENCE PROCEEDINGS).
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AU - Di Salvo, Tiziana

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AU - D'Antona, Fabio

AU - Lavagetto, Giuseppe

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