Time Variability of the Neutral Iron Lines from the Sagittarius B2 Region and Its Implication of a Past Outburst of Sagittarius A$^ast$

Inui Tatsuya; Koyama Katsuji; Matsumoto Hironori; Tsuru Takeshi Go

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Time Variability of the Neutral Iron Lines from the Sagittarius B2 Region and Its Implication of a Past Outburst of Sagittarius A$^ast$

机译：射手座B2区中性铁线的时变性及其对射手座过去爆发的影响A $ ^ ast $

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Weinvestigatedlong-termX-raybehaviorfromtheSgrB2complexusingarchivaldataoftheX-raysatellitesSuzaku,XMM-Newton,Chandra,andASCA.TheobservedregionoftheSgrB2complexincludedtwoprominentspotsintheFeIK$$alpha$$lineat6.40keV,agiantmolecularcloud,M0.66$$-$$0.02,knownasthea€?SgrB2clouda€?andanunusualX-raysource,G0.570$$-$$0.018.Althoughthese6.40keVspotshavespatialextensionsofafewparsecscale,themorphologyandfluxofthe6.40keVlinehasbeentimevariablefor10years,incontrasttotheconstantfluxoftheFeXXVK$$alpha$$lineat6.67keVintheGalacticdiffuseX-rayemission.ThistimevariationismostlyduetoM0.66$$-$$0.02;the6.40keVlinefluxdeclinedin2001,anddecreasedto60%inthetimespan1994a€“2005.Theotherspot,G0.570$$-$$0.018,isfoundtobeconspicuousonlyintheChandraobservationin2000.Fromthelong-termtimevariability($$sim$$10years)oftheSgrB2complex,weinferthattheGalacticCenterblackholeSgrA$$^ast$$wasX-raybrightinthepast300years,andexhibitedatimevariabilitywithaperiodofafewyears.

机译：Weinvestigatedlong-termX-raybehaviorfromtheSgrB2complexusingarchivaldataoftheX-raysatellitesSuzaku，XMM牛顿，钱德拉，andASCA.TheobservedregionoftheSgrB2complexincludedtwoprominentspotsintheFeIK $$阿尔法$$ lineat6.40keV，agiantmolecularcloud，M0.66 $$ - ？$$ 0.02，knownasthea€SgrB2clouda€andanunusualX-raysource，G0.570 $$ - $$ 0.018.Althoughthese6.40keVspotshavespatialextensionsofafewparsecscale，themorphologyandfluxofthe6.40keVlinehasbeentimevariablefor10years，incontrasttotheconstantfluxoftheFeXXVK $$阿尔法$$ lineat6.67keVintheGalacticdiffuseX-rayemission.ThistimevariationismostlyduetoM0.66 $$ - $$ 0.02; the6.40keVlinefluxdeclinedin2001，anddecreasedto60％inthetimespan1994a€“2005.Theotherspot，G0。 570 $$-$ 0.018，仅在2000年的钱德拉观测中就很明显。从SgrB2络合物的长期时间变异性（$$ sim $$ 10年）中，我们得出结论，银河系中心黑洞SgrA $ ^ ast $$在过去300年中具有X射线亮度，并且具有明显的时差。

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《PASJ: Publications of the Astronomical Society of Japan》 |2009年第sp1期|共页
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Inui Tatsuya; Koyama Katsuji; Matsumoto Hironori; Tsuru Takeshi Go;
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机译：来自射手座B2区的中性铁管线的时间可变性及其对Sagittarius的过去爆发的含义A $ ^ ist $
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Time Variability of the Neutral Iron Lines from the Sagittarius B2 Region and Its Implication of a Past Outburst of Sagittarius A$^ast$

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