双星超大质量黑洞候选体SDSS J095036.75+512838.1的多波段辐射研究
Investigating the Multiwavelength Emission of Binary SMBH Candidate SDSS J095036.75+512838.1
AI总结：
本研究通过多波段观测分析SDSS J095036.75+512838.1的辐射，发现其更符合单个经红化的AGN，近红外过量起源不明，未来高分辨率观测将助力验证其双星SMBH假说。
AI中文摘要：
我们呈现了对双星活动星系核（AGN）候选体SDSS J095036.75+512838.1的多波段研究结果，该天体因存在显著且可变的宽Hβ线位移而被确认为双星超大质量黑洞（SMBH）候选系统。我们利用可获取的红外至X射线数据研究该系统的吸积特性，通过分析钱德拉（Chandra）望远镜的最新观测数据，对X射线辐射进行表征并验证双星SMBH假说。研究发现，X射线光谱可由单个AGN很好地拟合，其2-10 keV波段光度为1.3×10^43 erg s^-1。通过构建综合多波段光谱能量分布（SED），我们进一步研究了环双星吸积的可能性：红外-光学辐射与单个AGN的预期辐射匹配，但在约9500-1900 Å波段观测到辐射过量，在约2600 Å附近存在辐射缺失；存档的光学光谱还显示约8500 Å附近存在辐射缺失。我们探究这些SED异常是否可由长期变异性或星际红化解释，结果未发现变暗的证据，而红化可解释紫外辐射的缺失，但近红外过量的起源仍不明确。最终，SDSS J095036的SED可由单个经红化的AGN辐射很好地描述，未来高分辨率红外和X射线光谱观测对于厘清近红外过量的起源及验证SDSS J095036的双星SMBH场景至关重要。
英文摘要：
We present results from a multiwavelength study of the binary AGN candidate SDSS J095036.75+512838.1, which was identified as a candidate binary SMBH system due to its significant and variable broad H$β$ line shifts. We use available infrared-to-X-ray data to investigate the system's accretion properties. Analyzing recent Chandra observations, we characterize the X-ray emission and test the binary SMBH hypothesis. We find that the X-ray spectrum is well-modeled as a single AGN, with a 2--10 keV luminosity of $1.3 \times10^{43}$ erg s$^{-1}$. By assembling a comprehensive multiwavelength spectral energy distribution, we further examine the possibility of circumbinary accretion. The infrared-optical emission matches that expected from a single AGN, though we observe an excess in emission between $\sim 9500-19000 Å$ and a deficit near $\sim 2600 Å$. Archival optical spectra also suggest a deficit near $\sim 8500 Å$. We investigate whether these SED anomalies can be explained by long-term variability or interstellar reddening. We find no evidence of dimming, while reddening can account for the deficit in UV emission. However, the origin of the near-infrared excess remains unclear. Ultimately, the SED of SDSS J095036 is well described by emission from a single, reddened AGN. Future high-resolution infrared and X-ray spectral observations will be crucial for disentangling the origin of the infrared excess and testing the binary SMBH scenario in SDSS J095036.
