Detailed Information on Publication Record
2010
ON MASS CONSTRAINTS IMPLIED BY THE RELATIVISTIC PRECESSION MODEL OF TWIN-PEAK QUASI-PERIODIC OSCILLATIONS IN CIRCINUS X-1
BAKALA, Pavel, Zdeněk STUCHLÍK, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK, Martin URBANEC et. al.Basic information
Original name
ON MASS CONSTRAINTS IMPLIED BY THE RELATIVISTIC PRECESSION MODEL OF TWIN-PEAK QUASI-PERIODIC OSCILLATIONS IN CIRCINUS X-1
Authors
Edition
Astrophysical Journal, CA - Kanada, 2010, 0004-637X
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
UT WoS
000276701000059
Keywords in English
HIGH-FREQUENCY QPOS, EQUATION-OF-STATE, X-RAY BINARIES, ACCRETING NEUTRON-STARS, SOURCE 4U 1636-53, BLACK-HOLE, GENERAL-RELATIVITY, DISK OSCILLATIONS, ATOLL SOURCE, KHZ QPOS
Tags
Tags
International impact, Reviewed
Links
GA202/09/0772, research and development project. LC06014, research and development project. MSM4781305903, plan (intention).
Změněno: 7/12/2020 11:55, Mgr. Pavlína Jalůvková
Abstract
V originále
Boutloukos et al. discovered twin-peak quasi-periodic oscillations (QPOs) in 11 observations of the peculiar Z-source Circinus X-1. Among several other conjunctions the authors briefly discussed the related estimate of the compact object mass following from the geodesic relativistic precession model for kHz QPOs. Neglecting the neutron star rotation they reported the inferred mass M-0 = 2.2 +/- 0.3 M-circle dot. We present a more detailed analysis of the estimate which involves the frame-dragging effects associated with rotating spacetimes. For a free mass we find acceptable fits of the model to data for (any) small dimensionless compact object angular momentum j = cJ/GM(2). Moreover, quality of the fit tends to increase very gently with rising j. Goodfits are reached when M similar to M-0[1 + 0.55(j + j(2))].