A roadmap to strange star. Issue 1 (8th February 2021)

• Record Type: Journal Article
• Authors: Xu, Renxin; Lai, Xiaoyu; Xia, Chengjun
• Other Names: Zen Vasconcellos C.A. guestEditor.; Hess P.O. guestEditor.; Piccinelli G. guestEditor.; Vargas Magaña M. guestEditor.; Ureña-Lopez L. guestEditor.; González Felipe R. guestEditor.; Boller Th. guestEditor.; Gullberg S. guestEditor.
• Is Part Of: Astronomische Nachrichten. Volume 342:Issue 1/2(2021)
• Page Start: 320
• Page End: 325
• Publication Date: 2021-02-08
• Subjects: pulsar -- neutron star -- dense matter -- elementary particles; Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.202113927
• Languages: English
• ISSNs: 0004-6337

Abstract

Abstract: What if normal baryonic matter is compressed so tightly that atomic nuclei come into close contact? This question has been asked since 1930s. The first answer was presented by Lev Landau whose speculation has been developed, and the concept of neutron star is then popularized. However, another answer is related to strange star, which becomes worthy of attention especially after the establishment of the standard model of particle physics in 1960s. The basic ideas of this study are introduced pedagogically. We must point out emphatically that flavor symmetry and strong coupling between quarks would be essential in seeking true answer to the question. The final answer is expected to appear in the era of multimessenger astronomy. It is emphasized too that, besides the differences of global properties (e.g., mass‐radius relation, maximum mass, tidal deformability), the strong‐bound surface of strange star (rather than the gravity‐bound one for conventional neutron star) could play an important role in identifying a strange star by astronomical observations.