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Title: SELF-TRAPPING OF DISKOSEISMIC CORRUGATION MODES IN NEUTRON STAR SPACETIMES

We examine the effects of higher-order multipole contributions of rotating neutron star (NS) spacetimes on the propagation of corrugation (c-)modes within a thin accretion disk. We find that the Lense–Thirring precession frequency, which determines the propagation region of the low-frequency fundamental corrugation modes, can experience a turnover allowing for c-modes to become self-trapped for sufficiently high dimensionless spin j and quadrupole rotational deformability α. If such self-trapping c-modes can be detected, e.g., through phase-resolved spectroscopy of the iron line for a high-spin low-mass accreting neutron star, this could potentially constrain the spin-induced NS quadrupole and the NS equation of state.
Authors:
 [1] ;  [2]
  1. Center for Theory and Computation, Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)
  2. Department of Physics and Astronomy, The University of Mississippi, University, MS 38677 (United States)
Publication Date:
OSTI Identifier:
22518617
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 818; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCRETION DISKS; EQUATIONS OF STATE; GRAVITATION; IRON; MASS; NEUTRON STARS; RELATIVISTIC RANGE; SPACE-TIME; SPIN; TRAPPING; X RADIATION