Gravitational Radiation from Pulsating Magnetic White Dwarfs

Benacquista, M.; Sedrakian, D. M.; Hairapetyan, M. V.; Shahabasyan, K. M.; Sadoyan, A. A.

doi:10.1023/b:asys.0000040161.39617.fb

Cited by 5 publications

(11 citation statements)

References 12 publications

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“…This has been confirmed by recent measurements [13]. It has been shown [9,10] that radiation of the energy of deformation in the form of gravitational waves is also an efficient mechanism for radiation from nonmagnetized white dwarfs. There the role of Joule losses in quasiradial pulsations has also been taken into account and it has been shown that these losses are much smaller than the energy which is converted into gravitational radiation.…”

Section: Introductionsupporting

confidence: 70%

“…The intensities J 0 of the gravitational radiation, the wave amplitude h 0 for an earthbound observer, and the amplitude η of the pulsations according to Eqs. (12), (10), and (7), respectively, are listed at the end of In order to estimate the gravitational radiation from galactic nuclei we specified a temperature of T c = 10 10 K in the center of the object and calculated α using Eq. (21).…”

Section: Polytropic Configurations With a Polytropic Index N =mentioning

confidence: 99%

“…The results of these studies can be compared with earlier work [8][9][10][11][12] on the gravitational radiation of compact objects. In addition, our calculations can be used to estimate the amplitude of the gravitational waves from galactic nuclei and quasars at the corresponding radiation frequency.…”

Section: Introductionmentioning

confidence: 96%

“…Thus, in order to consider gravitational radiation from objects in space it is necessary that processes leading to a time dependence for the quadrupole moment take place in them. Gravitational radiation of compact objects, i.e., white dwarfs and neutron stars, [2][3][4][5][6][7][8][9][10][11][12]. Because of their rotation, these objects are flattened and have nonzero quadrupole moments.…”

Section: Introductionmentioning

confidence: 99%

“…5, more accurate calculations show that these pulsations cannot cause changes in the quadrupole moment of the star; thus, these pulsations cannot be accompanied by the emission of gravitational waves [7]. A number of sources have been proposed [8][9][10][11][12] for continuous maintenance of quasiradial pulsations of white dwarfs and neutron stars. In these papers the radiation intensities were calculated for these sources and the amplitudes of the gravitational waves were estimated for an terrestrial observer.…”

Section: Introductionmentioning

confidence: 99%

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Gravitational Radiation of Relativistic n = 1 Polytropes

Sedrakian¹,

Hayrapetyan²

2005

Astrophysics

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The gravitational radiation of n = 1 polytropes undergoing quasiradial pulsations is examined. The intensity of the gravitational radiation and the gravitational wave amplitudes are calculated for polytropic models of white dwarfs and neutron stars when the energy of rotation of the object serves as the source of the radiated energy. Calculations of h 0 show that objects with a polytropic equation of state can describe the expected gravitational radiation from white dwarfs and neutron stars. The gravitational radiation of polytropic models of galactic nuclei and quasars is also examined. These objects can create a high enough background of gravitational radiation at frequencies of 10 -8 -10 -11 Hz for gravitational wave detectors operating in this frequency range.

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Section: Introductionsupporting

confidence: 70%

Section: Polytropic Configurations With a Polytropic Index N =mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gravitational Radiation of Relativistic n = 1 Polytropes

Sedrakian¹,

Hayrapetyan²

2005

Astrophysics

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Rotating Superdense Configurations: Pulsars and Their Astrophysical Manifestations

Sedrakian¹,

Чубарян²

2011

Ambartsumian’s Legacy and Active Universe

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Gravitational radiation from white dwarfs with rough surfaces

Sedrakian¹,

Hayrapetyan²,

Sadoyan³

2005

Astrophysics

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A white dwarf rotating at a maximal angular velocity can take a form of a triaxial ellipsoid due to the rotation and to the presence of mountains on its surface. Such an object emits gravitational waves at a frequency of 2Ω, where Ω is the angular velocity of rotation, and the source of the radiated energy is the rotational kinetic energy. It is shown that the gravitational waves from rapidly rotating white dwarfs at an average distance of 50 pc from an terrestrial observer have an amplitude on the order of 10 -24 , so they can be detected by the new generation of detectors. Gravitational radiation from a pulsating white dwarf with a rough surface is also examined. It is shown that quasiradial pulsations of a white dwarf are long-lived; that is, once perturbed, a white dwarf will emit gravitational waves during all lifetime.

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Gravitational Radiation from Pulsating Magnetic White Dwarfs

Cited by 5 publications

References 12 publications

Gravitational Radiation of Relativistic n = 1 Polytropes

Gravitational Radiation of Relativistic n = 1 Polytropes

Rotating Superdense Configurations: Pulsars and Their Astrophysical Manifestations

Gravitational radiation from white dwarfs with rough surfaces

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