{"title":"Non-Newtonian gravity in color-flavor locked strange stars and the 2.6M⊙ component in GW190814","authors":"Chun-Mei Pi , Shu-Hua Yang","doi":"10.1016/j.newast.2024.102347","DOIUrl":null,"url":null,"abstract":"<div><div>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 (<span><math><mrow><mn>2</mn><mo>.</mo><mn>5</mn><msubsup><mrow><mn>9</mn></mrow><mrow><mo>−</mo><mn>0</mn><mo>.</mo><mn>09</mn></mrow><mrow><mo>+</mo><mn>0</mn><mo>.</mo><mn>08</mn></mrow></msubsup><mspace></mspace><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></mrow></math></span>). We find that the allowed region in the <span><math><msubsup><mrow><mi>B</mi></mrow><mrow><mi>eff</mi></mrow><mrow><mn>1</mn><mo>/</mo><mn>4</mn></mrow></msubsup></math></span>–<span><math><mi>Δ</mi></math></span> parameter space (<span><math><msub><mrow><mi>B</mi></mrow><mrow><mi>eff</mi></mrow></msub></math></span> is the effective bag constant and <span><math><mi>Δ</mi></math></span> is the pairing gap) becomes larger and the minimum allowed value of <span><math><mi>Δ</mi></math></span> becomes smaller with the increasing of the non-Newtonian gravity parameter <span><math><mrow><msup><mrow><mi>g</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>. For small values of <span><math><mrow><msup><mrow><mi>g</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, the color-flavor locked phase must be employed to support a static <span><math><mrow><mn>2</mn><mo>.</mo><mn>6</mn><mspace></mspace><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></mrow></math></span> strange star. However, if <span><math><mrow><msup><mrow><mi>g</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span> is large enough, the maximum mass of the static strange stars made of unpaired strange quark matter could be larger than <span><math><mrow><mn>2</mn><mo>.</mo><mn>6</mn><mspace></mspace><msub><mrow><mi>M</mi></mrow><mrow><mo>⊙</mo></mrow></msub></mrow></math></span>. Specifically, for the cases of <span><math><mrow><msub><mrow><mi>a</mi></mrow><mrow><mn>4</mn></mrow></msub><mo>=</mo><mn>0</mn><mo>.</mo><mn>6</mn></mrow></math></span>, 0.7, and 0.8 (<span><math><msub><mrow><mi>a</mi></mrow><mrow><mn>4</mn></mrow></msub></math></span> is the perturbative quantum chromodynamics corrections term), the turning points are <span><math><mrow><msup><mrow><mi>g</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><msup><mrow><mi>μ</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>=</mo><mn>2</mn><mo>.</mo><mn>15</mn></mrow></math></span>, 3.59, and 4.75 GeV<sup>−2</sup>, respectively.</div></div>","PeriodicalId":54727,"journal":{"name":"New Astronomy","volume":"116 ","pages":"Article 102347"},"PeriodicalIF":1.9000,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Astronomy","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1384107624001611","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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 (). We find that the allowed region in the – parameter space ( is the effective bag constant and is the pairing gap) becomes larger and the minimum allowed value of becomes smaller with the increasing of the non-Newtonian gravity parameter . For small values of , the color-flavor locked phase must be employed to support a static strange star. However, if is large enough, the maximum mass of the static strange stars made of unpaired strange quark matter could be larger than . Specifically, for the cases of , 0.7, and 0.8 ( is the perturbative quantum chromodynamics corrections term), the turning points are , 3.59, and 4.75 GeV−2, respectively.
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.