R-modes of accreting hyperon stars as persistent sources of gravitational waves

被引：73

作者：

Nayyar, M ^{[1
]}

Owen, BJ

机构：

[1] Penn State Univ, Inst Gravitat Phys & Geometry, Dept Phys, University Pk, PA 16802 USA

[2] Penn State Univ, Ctr Gravitat Wave Phys, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.73.084001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The r-modes of accreting neutron stars could be a detectable source of persistent gravitational waves if the bulk viscosity of the stellar matter can prevent a thermal runaway. This is possible if exotic particles such as hyperons are present in the core of the star. We compute bulk viscous damping rates and critical frequencies for r-modes of neutron stars containing hyperons in the framework of relativistic mean field theory. We combine the results of several previous calculations of the microphysics, include for the first time the effect of rotation, and explore the effects of various parameters on the viability of persistent gravitational wave emission. We find that persistent emission is quite robust, although it is disfavored in stars below 1.3-1.5 M depending on the equation of state. In some cases persistent emission is compatible with temperatures as low as 10(7) K, observed in some accreting neutron stars in quiescence.

引用

页数：14

共 54 条

[11] Nuclear-powered millisecond pulsars and the maximum spin frequency of neutron stars [J].

Chakrabarty, D ;

Morgan, EH ;

Muno, MP ;

Galloway, DK ;

Wijnands, R ;

van der Klis, M ;

Markwardt, CB .

NATURE, 2003, 424 (6944) :42-44

[12] Gravitationally redshifted absorption lines in the X-ray burst spectra of a neutron star [J].

Cottam, J ;

Paerels, F ;

Mendez, M .

NATURE, 2002, 420 (6911) :51-54

[13]

CUTLER C, GRQC0204090

[14]

Glendenning N. K., 2012, Compact stars: Nuclear physics, particle physics and general relativity, DOI DOI 10.1007/978-1-4684-0491-3

[15] NEUTRON STARS ARE GIANT HYPERNUCLEI [J].

GLENDENNING, NK .

ASTROPHYSICAL JOURNAL, 1985, 293 (02) :470-493

[16] Bulk viscosity in superfluid neutron star cores -: III.: Effects of Σ- hyperons [J].

Haensel, P ;

Levenfish, KP ;

Yakovlev, DG .

ASTRONOMY & ASTROPHYSICS, 2002, 381 (03) :1080-1089

[17] Review of particle physics -: art. no. 010001 [J].

Hagiwara, K ;

Hikasa, K ;

Nakamura, K ;

Tanabashi, M ;

Aguilar-Benitez, M ;

Amsler, C ;

Barnett, RM ;

Burchat, PR ;

Carone, CD ;

Caso, C ;

Conforto, G ;

Dahl, O ;

Doser, M ;

Eidelman, S ;

Feng, JL ;

Gibbons, L ;

Goodman, M ;

Grab, C ;

Groom, DE ;

Gurtu, A ;

Hayes, KG ;

Hernández-Rey, JJ ;

Honscheid, K ;

Kolda, C ;

Mangano, ML ;

Manley, DM ;

Manohar, AV ;

March-Russell, J ;

Masoni, A ;

Miquel, R ;

Monig, K ;

Murayama, H ;

Navas, S ;

Olive, KA ;

Pape, L ;

Patrignani, C ;

Piepke, A ;

Roos, M ;

Terning, J ;

Tornqvist, NA ;

Trippe, TG ;

Vogel, P ;

Wohl, CG ;

Workman, RL ;

Yao, WM ;

Armstrong, B ;

Gee, PS ;

Lugovsky, KS ;

Lugovsky, SB ;

Lugovsky, VS .

PHYSICAL REVIEW D, 2002, 66 (01)

[18] SLOWLY ROTATING RELATIVISTIC STARS .I. EQUATIONS OF STRUCTURE [J].

HARTLE, JB .

ASTROPHYSICAL JOURNAL, 1967, 150 (3P1) :1005-+

[19] Low-mass X-ray binaries may be important laser interferometer gravitational-wave observatory sources after all [J].

Heyl, JS .

ASTROPHYSICAL JOURNAL, 2002, 574 (01) :L57-L60

[20]

JONES PB, 1970, ASTROPHYS LETT, V5, P33

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