IRAS F13308+5946: A POSSIBLE TRANSITION PHASE FROM TYPE I ULTRALUMINOUS INFRARED GALAXY TO OPTICAL QUASAR
IRAS F13308+5946: A POSSIBLE TRANSITION PHASE FROM TYPE I ULTRALUMINOUS INFRARED GALAXY TO OPTICAL QUASAR
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DOI：
10.1088/0004-637x/718/2/928
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发表时间：
2010-05
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影响因子：
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通讯作者：
Xianmin Meng;Hong Wu;Q. Gu;Jing Wang;Chen Cao
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文献类型：
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作者：
Xianmin Meng;Hong Wu;Q. Gu;Jing Wang;Chen Cao
本文对一个I型亮红外星系IRAS F13308+5946的星族合成进行了研究。它是一个绝对星等Mi = −22.56的类星体，并且具有赛弗特1.5星系的光谱特征。光学图像显示了合并后期的特征。借助恒星合成代码星光和卡尔泽蒂等人。和Leitherer et al.的消光曲线，我们估计过去的主星系的红外（IR）光度，发现它可能经历了近3亿年的超亮红外星系（ULIRG）阶段，所以这个星系可能经历了I型ULIRG阶段。核星暴（SB）和活动星系核对目前的红外光度收支都有贡献，其中SB的贡献为70%。超大质量黑洞的质量为MBH = 1.8 × 108 M，爱丁顿比Lbol/LEdd = 0.12，两者都是Palomar-Green类星体的近似典型值。这些结果表明，IRAS F13308+5946可能正处于从I型ULIRG向经典类星体的过渡阶段。
We present a stellar population synthesis study of a type I luminous infrared galaxy: IRAS F13308+5946. It is a quasar with absolute magnitude Mi = −22.56 and has the spectral feature of a Seyfert 1.5 galaxy. Optical images show characteristics of later stages of a merger. With the help of the stellar synthesis code starlight and both Calzetti et al.'s and Leitherer et al.'s extinction curves, we estimate the past infrared (IR) luminosities of the host galaxy and find that it may have experienced an ultraluminous infrared galaxy (ULIRG) phase for nearly 300 Myr, so this galaxy has probably experienced a type I ULIRG phase. Both nuclear starburst (SB) and active galactic nuclei contribute to the present IR luminosity budget, with the SB contributing ∼70%. The mass of the supermassive black hole is MBH = 1.8 × 108 M☉ and the Eddington ratio Lbol/LEdd is 0.12, both of which are approximate typical values of Palomar–Green QSOs. These results indicate that IRAS F13308+5946 is probably at the transitional phase from a type I ULIRG to a classical QSO.