Non-Newtonian gravity in color-flavor locked strange stars and the 2.6M⊙ component in GW190814

IF 1.9 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Chun-Mei Pi , Shu-Hua Yang
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引用次数: 0

Abstract

We investigate the effects of non-Newtonian gravity on the properties of the color-flavor locked strange stars and constrain the parameters of the strange quark matter model using the mass of the GW190814’s secondary component (2.590.09+0.08M). We find that the allowed region in the Beff1/4Δ parameter space (Beff is the effective bag constant and Δ is the pairing gap) becomes larger and the minimum allowed value of Δ becomes smaller with the increasing of the non-Newtonian gravity parameter g2/μ2. For small values of g2/μ2, the color-flavor locked phase must be employed to support a static 2.6M strange star. However, if g2/μ2 is large enough, the maximum mass of the static strange stars made of unpaired strange quark matter could be larger than 2.6M. Specifically, for the cases of a4=0.6, 0.7, and 0.8 (a4 is the perturbative quantum chromodynamics corrections term), the turning points are g2/μ2=2.15, 3.59, and 4.75 GeV−2, respectively.
有色味的非牛顿引力锁定了奇怪的恒星和GW190814中的2.6M⊙成分
我们研究了非牛顿引力对色味锁定奇异恒星性质的影响,并利用GW190814次级分量的质量(2.59−0.09+0.08⊙)约束了奇异夸克物质模型的参数。我们发现,随着非牛顿引力参数g2/μ2的增大,Beff / 1 -Δ参数空间(Beff为有效袋常数,Δ为配对间隙)的允许区域变大,Δ的最小允许值变小。对于较小的g2/μ2值,必须采用色香味锁相来支撑一个静态的2.6M⊙奇异星。然而,如果g2/μ2足够大,由未配对奇异夸克物质组成的静态奇异星的最大质量可能大于2.6M⊙。具体来说,当a4=0.6、0.7和0.8时(a4为微扰量子色动力学修正项),拐点分别为g2/μ2=2.15、3.59和4.75 GeV−2。
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来源期刊
New Astronomy
New Astronomy 地学天文-天文与天体物理
CiteScore
4.00
自引率
10.00%
发文量
109
审稿时长
13.6 weeks
期刊介绍: New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.
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