Strange stars confronting with the observations: Non‐Newtonian gravity effects, or the existence of a dark‐matter core. Issue 1 (22nd November 2022)

• Record Type: Journal Article
• Authors: Pi, Chun‐Mei; Yang, Shu‐Hua
• Other Names: Zen Vasconcellos C.A. guestEditor.; Sacahui Reyes J.R. guestEditor.; Hess P.O. guestEditor.; Piccinelli G. guestEditor.; Vargas Magana M. guestEditor.; Gonzalez Felipe R. guestEditor.; Boller Th. guestEditor.; Gullberg S. guestEditor.; Hadjimichef D. guestEditor.
• Is Part Of: Astronomische Nachrichten. Volume 344:Issue 1/2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-22
• Subjects: alternative gravity -- dark matter -- equation of state -- strange stars; Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.20220083
• Languages: English
• ISSNs: 0004-6337

Abstract

Abstract: We find that the existence of strange stars is ruled out by the dimensionless tidal deformability of a 1.4 M ⊙ $$ 1.4\kern0.3em {M}_{\odot } $$ star of GW170817 and the mass of PSR J0740 + 6620, both for the standard MIT bag model and for the density‐dependent quark mass model. However, if non‐Newtonian gravity effects are considered, strange stars can exist for certain ranges of the values of the non‐Newtonian gravity parameter. An alternative explanation to these observations is to suppose that strange stars in GW170817 have a dark‐matter core.