SELF-TRAPPING OF DISKOSEISMIC CORRUGATION MODES IN NEUTRON STAR SPACETIMES

David Tsang, George Pappas

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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.
Original languageEnglish
Article numberL11
JournalAstrophysical Journal Letters
Volume818
Issue number1
DOIs
Publication statusPublished - Feb 2016

Fingerprint

precession
equation of state
neutron stars
trapping
turnover
spectroscopy
accretion
iron
quadrupoles
propagation
accretion disks
multipoles
equations of state
low frequencies
effect

Cite this

SELF-TRAPPING OF DISKOSEISMIC CORRUGATION MODES IN NEUTRON STAR SPACETIMES. / Tsang, David; Pappas, George.

In: Astrophysical Journal Letters, Vol. 818, No. 1, L11, 02.2016.

Research output: Contribution to journalArticle

@article{185f801fff554724b17302d0368b6d4c,
title = "SELF-TRAPPING OF DISKOSEISMIC CORRUGATION MODES IN NEUTRON STAR SPACETIMES",
abstract = "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.",
author = "David Tsang and George Pappas",
year = "2016",
month = "2",
doi = "10.3847/2041-8205/818/1/L11",
language = "English",
volume = "818",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing",
number = "1",

}

TY - JOUR

T1 - SELF-TRAPPING OF DISKOSEISMIC CORRUGATION MODES IN NEUTRON STAR SPACETIMES

AU - Tsang, David

AU - Pappas, George

PY - 2016/2

Y1 - 2016/2

N2 - 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.

AB - 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.

U2 - 10.3847/2041-8205/818/1/L11

DO - 10.3847/2041-8205/818/1/L11

M3 - Article

VL - 818

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - L11

ER -