【摘 要】
：
We consider both gauged and ungauged minimal supergravities in five dimensions and analyse the charged rotating solutions with two equal angular momenta J.When the electric charge Q ～ J2/3 with some specific coefficient,we find new extremal black objects
【机 构】
：
Center for Joint Quantum Studies and Department of Physics,School of Science,Tianjin University,Tian
【出 处】
：
中国科学：物理学 力学 天文学（英文版）
论文部分内容阅读
We consider both gauged and ungauged minimal supergravities in five dimensions and analyse the charged rotating solutions with two equal angular momenta J.When the electric charge Q ～ J2/3 with some specific coefficient,we find new extremal black objects emerge that are asymptotic to either Minkowski or global AdS spacetimes and can be best described as degenerate black rings.Their near-horizon geometry is locally AdS3 × S2,where the periodic U(1) fibre coordinate in S3 untwists and collapses to be the degenerate part of the AdS3 horizon.It turns out that there are two branches of extremal rotating black holes,starting as the extremal RN black holes of the same mass,but opposite charges.With the increasing of the angular momentum,they will join to become the same degenerate black ring,where the Gibbs free energies however are not continuous at the joining.For the same Q(J) relation,we find that there is in addition a rotating soliton whose mass is smaller than that of the degenerate black ring.
其他文献
In plants and animals,male gamete differentiates and ferti-lizes an egg cell,which develops into different types of specialized cells,tissues,and ultimately an individual.Dur-ing this complex developmental process,germline develop-ment is critical,because
Meiosis is the key process for producing mature gametes.A natural fertile triploid Carassius auratus population (3nDTCC) and an artificially derived sterile triploid crucian carp (3nCC) have been previously observed,providing suitable model organisms for
Inflammatory bowel disease (IBD) is a chronic lifelong disease characterized by inflammation of the gastrointestinal tract.Although more and more treatment options serve IBD,there is still no cure.It is important to find an effective treatment for IBD.Thi
Hens are raised apart from roosters in modem poultry production,a substantial change from their natural social structure.We compared productivity,injuries,behavior,physiology,microbiome and transcriptome of hens housed with (R+) or without (R-)roosters to
Malnutrition reduces tolerance and effectiveness of anti-tu-mor treatment (ANT),increases the risk of complications,medical costs,and death (Arends et al.,2017).About 40％ of patients with cancer die because of malnutrition rather than the disease itself (
Dear Editor,rnThe insect cuticle is a multifunctional coat that defines and stabilizes the shape of the body,appendages and internal organs,serves as a barrier against water and chemical compounds,such as insecticides,prevents infection and protects again
Dear Editor,rnIn the last century,H1N1,H2N2,and H3N2 influenza viruses caused pandemics in 1918,1957,and 1968,respec-tively.In 2009,a novel H1N1 reassortant jumped from pigs to humans and caused a fourth influenza pandemic.Different lineages of H3N2 influ
Dear editor,rnEndotoxic shock usually results from infection-induced physiologic,pathologic,and biologic abnormalities (Singer et al.,2016).Undeniably,it is still a profoundly damaging and life-threatening condition for many individuals (Guan et al.,2019;
In spite of the success of the cold dark matter (CDM) mod-els working well at large scales,several discrepancies have arisen regarding CDM on galaxy scales.Some of these are described as the cusp-core,diversity,missing satellites,and too-big-to-fail anoma
Self-interacting dark matter (SIDM) is a leading candidate proposed to solve discrepancies between predictions of the prevailing cold dark matter theory and observations of galaxies.Many SIDM models predict the existence of a light force carrier that medi