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arXiv 0907.3470astro-ph.CO
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类星体SDSS J105041 .35+345631.3:黑洞反冲还是极端双峰发射体?

The Quasar SDSS J105041.35+345631.3: Black Hole Recoil or Extreme Double-Peaked Emitter?

G. A. Shields, D. J. Rosario, K. L. Smith, E. W. Bonning, S. Salviander, J. S. Kalirai, R. Strickler, E. Ramirez-Ruiz, A. A. Dutton, T. Treu, P. J. Marshall

摘要:

类星体SDSS J105041.35+345631.3(z = 0.272)的宽发射线相对于窄线和宿主星系蓝移了3500 km/s。这样的天体可能是反冲的超大质量黑洞、双黑洞、两个天体的叠加,或者是宽发射线区域的不寻常几何形状。在宽线红移处没有窄线反对叠加。J1050+3546的新Keck光谱对二元模型提出了严格的限制。大的速度位移和对称的H-β分布,以及窄的线光谱的结合,使J1050+3546成为黑洞反冲的有趣候选者。然而,光谱的其他方面表明,该物体很可能是一个极端的“双峰发射体”。我们讨论了可能的观测测试,以确定这个特殊物体的真实性质。

英文摘要:

The quasar SDSS J105041.35+345631.3 (z = 0.272) has broad emission lines blueshifted by 3500 km/s relative to the narrow lines and the host galaxy. Such an object may be a candidate for a recoiling supermassive black hole, binary black hole, a superposition of two objects, or an unusual geometry for the broad emission-line region. The absence of narrow lines at the broad line redshift argues against superposition. New Keck spectra of J1050+3546 place tight constraints on the binary model. The combination of large velocity shift and symmetrical H-beta profile, as well as aspects of the narrow line spectrum, make J1050+3546 an interesting candidate for black hole recoil. Other aspects of the spectrum, however, suggest that the object is most likely an extreme case of a ``double-peaked emitter.'' We discuss possible observational tests to determine the true nature of this exceptional object.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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