资源描述:
《引力波源宇宙原初引力波.ppt》由会员上传分享,免费在线阅读,更多相关内容在PPT专区-天天文库。
1、1Gravitational-wavestandardsirensasaprobeofcosmologyWenZhaoDepartmentofAstronomyUniversityofScienceandTechnologyofChinaBasedon:WZ,VanDenBroeck,Baskaran&Li,Phys.Rev.D83,023005(2011)提纲引力波源与引力波探测器引力波源作为标准铃声在宇宙学中的应用2引力波源与引力波探测器宇宙学的“引力波源”宇宙原初引力波(PGW),宇宙弦产生引力波,早期宇宙相变产生引力波“超大质量黑洞”作为引力波源10
2、^{6}-10^{9}太阳质量的双黑洞系统(SMBH)“中子星、恒星质量黑洞”作为引力波源太阳质量的黑洞,中子星双星系统(BNS&NSBH)3引力波源与引力波探测器45引力波源作为“标准铃声”In1986,Schutzfoundthattheluminositydistanceofthebinaryneutronstars(orblackhole)canbeindependentlydeterminedbyobservingtheG.W.generatedbythissystem.IfwecanalsofindtheEMcounterpart,thereds
3、hiftcanalsobedetermined.ThusthedL-zrelationcanbeusedtostudytheevolutionofuniverse.Thisistheso-called:standardsirens.(Schutz,Nature,1986)characters:1.non-EMmethodtostudythecosmology2.independentof“cosmicdistanceladder”*测量哈勃常数地面的Adv.LIGO,Adv.VIRGO(BNS,NSBH)*测量宇宙暗能量地面的EinsteinTelescop
4、e(BNS,NSBH)空间的LISA(SMBBH)空间的BBO(BNS,NSBH)引力波源作为“标准铃声”为什么需要别的方法来确定“红移”?*仅靠引力波的观测无法(很难)定出红移*打破波源的“位置参数”与“內秉参数”之间的耦合6引力波源作为“标准铃声”怎样确定波源的“红移”?*通过引力波探测器的高空间分辨率,找到波源的宿主星系,通过光谱来确定其红移(空间引力波探测器)(Throne,1987;Wen&Chen,PRD,2010)*通过引力潮汐在引力波相位中的体现来确定红移(5PN)(Messenger&Read,PRL,2012)*找到其光学对应体来确定红移
5、,例如伽玛暴,X射线暴等789在宇宙学中的应用------1.直接测量哈勃常数10在宇宙学中的应用------2.直接测量哈勃参数的演化11在宇宙学中的应用------3.区分暗能量与修改引力理论1213在宇宙学中的应用------4.探测宇宙暗能量(WZ,vanBroeck,Baskaran&Li,Phys.Rev.D,2011)Since1998,peoplediscoveredtheanacceleratingexpansionoftheuniversebytheobservationsofSNIa.Nowthemainobservationsincl
6、ude:SNIa,CMB,BAO,WL,GRBandsoon,whichallsupporttheLCDMmodel.Inthismodel,70%energyistheso-calleddarkenergy,mimicthecosmologicalconstant.Now,manydarkenergymodelsaresuggested:Quinessence,Phantom,Quintom,YMC,HDE,MGandsoon.14DarkEnergyProblemThekeytodistinguishvariousmodelsisbasedontheob
7、servationsofEOS.Inthenearfuture,themainprobesarestillvariousEMmethods:CMB,SNIa,BAO,WL[see“ReportofDETF”fordetails].Problem:Arethereanynon-EMmethod?(Komatsuetal.2010)15Gravitational-waveDetectorsGround-based:LIGO,VIRGO,GEO,TAMAAdv.LIGO,Adv.VIRGO(2015)ET(2020?)Space-based:LISA(2020?)
8、BBO,DECIGO,ASTROD(GodKnows