On the Continuum Shape of Broad Absorption Line Quasars

Yamamoto Tetsuo M.; Vansevi??ius Vladas

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On the Continuum Shape of Broad Absorption Line Quasars

机译：宽吸收线类星体的连续体形状

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Thecontinuumshapeof26broadabsorptionline(BAL)QSOsisshowntobevirtuallyidenticaltothatofnon-BALQSOswhenthespectraoftheformeraredereddened.AprocedurefordereddeningofBALQSOspectraisintroduced,basedonmeasurementofthefluxinthreebandsanddeterminationofthecolourexcessincomparisonwithanunreddenedspectrum.Thismethodallowsustoderivethetypeandamountofextinction.Weshowthatreddeninginhigh-ionizationBALQSOsiscomparativelysmallandtherangeofextinctionlawsvariesfromMilkyWay,LMCtoSMCtype.Ontheotherhand,low-ionizationBALQSOsseemtoexperiencereddeningwhichcanbeattributedtoSMCtypeextinctionalone.ComparisonofthecolourindicesofcompositespectrafromFrancisetal.(1991)andZhengetal.(1997)withthosederivedfromindividualBALQSOspectrashowsthattheFrancisetal.(1991)compositemightbeamoresuitablerepresentativeofanunreddenedspectrum.Ingeneral,weconcludethatthespectralenergydistributionofnormalQSOscanbeusedasanincidentcontinuumshapeforBALQSOs.

机译：Thecontinuumshapeof26broadabsorptionline（BAL）QSOsisshowntobevirtuallyidenticaltothatofnon-BALQSOswhenthespectraoftheformeraredereddened.AprocedurefordereddeningofBALQSOspectraisintroduced，basedonmeasurementofthefluxinthreebandsanddeterminationofthecolourexcessincomparisonwithanunreddenedspectrum.Thismethodallowsustoderivethetypeandamountofextinction.Weshowthatreddeninginhigh-ionizationBALQSOsiscomparativelysmallandtherangeofextinctionlawsvariesfromMilkyWay，LMCtoSMCtype.Ontheotherhand，低ionizationBALQSOsseemtoexperiencereddeningwhichcanbeattributedtoSMCtypeextinctionalone.ComparisonofthecolourindicesofcompositespectrafromFrancisetal。（1991）andZhengetal。（1997）withthosederivedfromindividualBALQSOspectrashowsthattheFrancisetal。（1991）compositemightbeamoresuitablerepresentativeofanunreddenedspectrum.Ingeneral，weconcludethatthespectralenergydistributionofnormalQSOscanbeusedasanincidentcontinuumshapeforBALQSOs。

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《PASJ: Publications of the Astronomical Society of Japan》 |1999年第3期|共页
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Yamamoto Tetsuo M.; Vansevi??ius Vladas;
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4. Extragalactic jets of broad absorption line (BAL) quasars [C] . M. Kunert-Bajraszewska, M. Ceglowski, C. Roskowiński, International Astronomical Union., Symposium . 2015

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机译：关于宽吸收线Quasars的连续形状

On the Continuum Shape of Broad Absorption Line Quasars

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