a supermassive black hole or a compact object without events horizon

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1、ASupermassiveBlackHoleoraCompactObjectWithoutEventsHorizon?L.V.Verozub&E.Yu.BannikovaKharkovStateUniversity,Kharkov310077,Kharkov,Ukraine,E-mail:verozub@gravit.kharkov.uaAbstractPreviouslyitwasshownthatgravitationtheoryallowstheex-istanceofsupermassivestablecompactconfigurationsofth

2、edegen-eratedelectronicgas(L.V.Verozub,Astr.Nacr.317(1996)107)withouteventshorizon.Inthepresentpaperthesimplestmodelofsuchkindofobjectsingasenvironmenthasbeenconsidered.Itisshownthatatthesphericallysymmetricaccretionontotheobjecttheluminosityisabout1037erg/sforthemassaccretionrateo

3、ftheorder·ofM=10−6M⊙/year.Thevawelengthoftheradiationmaximumis◦about400÷500A.Thereisanionizationzonearoundthecentralobjectswiththeradiusabout10−3pc.arXiv:astro-ph/9805299v122May19981IntroductionTheanalysisoftheobservationdatagivesevidencefortheexistanceofamassive(about2.5·106M)comp

4、actobjectintheGalacticCenter[1].The⊙observationdatadonotallowtomakeadefiniteconclusionaboutthenatureoftheobject.Forthisreasonitisidentified,asarule,withasupermassiveblackhole.Anotherpossibilityisconsideredinthepresentpaper.Thegravitationequationswhosesphericallysymmetricsolutionhaven

5、oandphysicalsingularityinflatspace-timefromtheviewpointofaremoteobserverwhereproposedinthepaper[2].Accordingtotheequationsthe1eventshorizonisabsentinthesphericallysymmetricsolution.TheradialcomponentofthegravityforceFaffectingatestparticlewithmassminthesphericalcoordinatesysteminflats

6、pace-timeisgivenbyhi21012F=−mcB00+(2B01−B11)v].(1)HereB1,B0andB1arethenonzerocomponentsofthestrengthtensor000111γBαβofgravityfieldinflatspace-time:1αf′f4(1−α/f)1B00=,(2)2f2r40B01=2/r,(3)1αf′1B11=,(4)2f2(1−α/f)33f=(α+r),(5)α=2GM/c2istheSchwarzshildradiusandvistheradialcomponentofthepa

7、rticlevelocity.Fig1showsthevalueof

8、F

9、fortheparticleatrestasafunctionofr=r/α.Itisshowninthepaper[3]thatintheabovetheorytherecanexistequi-libriumstableconfigurationsofthedegeneratedelectronicgaswithmassesupto109Mormorethanthat.Thiskindofobjectstherecanexistinthe⊙GalacticCenter.Fortuna

10、tely,therearesomeconsequen