| Title | The X-Ray Light Curve in GRB 170714A: Evidence for a Quark Star? |
| Authors | Hou, Shu-Jin Liu, Tong Xu, Ren-Xin Mu, Hui-Jun Song, Cui-Ying Lin, Da-Bin Gu, Wei-Min |
| Affiliation | Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Henan, Peoples R China. Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Yunnan, Peoples R China. Guangxi Univ, Dept Phys, Lab Relativist Astrophys, Nanning 530004, Guangxi, Peoples R China. Xiamen Univ, Dept Astron, Xiamen 361005, Fujian, Peoples R China. Peking Univ, Sch Phys, Beijing 100871, Peoples R China. |
| Keywords | dense matter gamma-ray burst: individual (GRB 170714A) magnetic fields star: neutron BLANDFORD-ZNAJEK PROCESS MILLISECOND MAGNETAR ENERGY INJECTION CENTRAL ENGINE NEUTRON-STAR BURST AFTERGLOW LONG EMISSION GRB-060614 SIGNATURE |
| Issue Date | 2018 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Citation | ASTROPHYSICAL JOURNAL. 2018, 854(2). |
| Abstract | Two plateaus and a following bump in the X-ray light curve of GRB 170714A have been detected by the Swift/X-ray Telescope, which could be very significant for the central engine of gamma-ray bursts (GRBs), implying that the origin of this burst might be different from those of other ultra-long GRBs. We propose that merging two neutron stars into a hyper-massive quark star (QS) and then collapsing into a black hole (BH), with a delay time around 10(4) s, could be responsible for these X-ray components. The hyper-massive QS is initially in a fluid state, being turbulent and differentially rotating, but would solidify and release its latent heat, injecting it into the GRB fireball (lasting about 103 s during the liquid-solid phase transition). A magnetic field as high as similar to 10(15) G can be created by dynamo action of the newborn liquid QS, and a magnetar-like central engine (after solidification) supplies significant energy for the second plateau. More energy could be released during a fall-back accretion after the post-merger QS collapses to a BH, and the X-ray bump forms. This post-merger QS model could be tested by future observations, with either advanced gravitational wave detectors (e.g., advanced LIGO and VIRGO) or X-ray/optical telescopes. |
| URI | http://hdl.handle.net/20.500.11897/510953 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/aaabba |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
