吴庆文^1，*， Bozena Czerny^2，， Mikolaj Grzedzielski^3，， Agnieszka Janiuk^3，，顾为民^4，， 董爱军^1，， 操小凤^5，， 游贝^2，， 闫震^6，， 孙牟远^4，

（  1、华中科技大学 物理学院,武汉, 430074 ；       2、波兰 哥白尼天文中心,华沙, 00-716；       3、波兰 理论物理研究中心,华沙, 02-668；       4、厦门大学天文系,厦门, 361005；       5、湖北第二师范学院 物理与电子信息系,武汉 430205；       6、中国科学院上海天文台, 上海, 200030；  ）

摘要： 极亮X射线源HLX-1是最佳的中等质量黑洞后选体之一,大约每400天爆发一次。这种准周期性的爆发机制目前并不清楚,我们发现如果其黑洞质量大约是10 万个太阳质量,则辐射压不稳定性可以很好的解释这种准周期爆发的光变幅度和时标。我们还进一步发现一个不同尺度黑洞天体都符合爆发时标和光度统一关系,该统一关系与吸积盘辐射压不稳定性预言吻合,该结果暗示吸积盘辐射压不稳定性可能存在于不同尺度黑洞天体中。
关键词： 天体物理、黑洞、吸积盘、活动星系核

Wu Qingwen^1,*， Bozena Czerny^2,， Mikolaj Grzedzielski^3,， Agnieszka Janiuk^3,，Wei-Min Gu^4,， Ai-jun Dong^1,， Xiao-Feng Cao^5,， Bei You^2,， Zhen Yan^6,， Mou-Yuan Sun^4,

（  1、School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China ；       2、Nicolaus Copernicus Astronomical Center PAS, Bartycka 18, 00-716 Warsaw, Poland ；       3、Center for Theoretical Physics, Al. Lotnikow 32/46, 02-668 Warsaw, Poland ；       4、Department of Astronomy, Xiamen University, Xiamen, Fujian 361005, China ；       5、School of Physics and Electronics Information, Hubei University of Education, 430205 Wuhan, China ；       6、Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China ；  ）

Abstract： The hyperluminous X-ray source (HLX-1, the peak X-ray luminosity $sim 10^{42} m erg s^{-1}$) near the spiral galaxy ESO 243-49 is possibly the best candidate for intermediate mass black hole (IMBH), which underwent recurrent outbursts with a period of $sim 400$ days. The physical reason for this quasi-periodic variability is still unclear. We explore the possibility of radiation-pressure instability in accretion disk by modeling the light curve of HLX-1, and find that it can roughly reproduce the duration, period and amplitude of the recurrent outbursts HLX-1 with an IMBH of $sim 10^5$ Msun. Our result provides a possible mechanism to explain the recurrent outbursts in HLX-1. We further find a universal correlation between the outburst duration and the bolometric luminosity for the BH sources with a very broad mass range (e.g., X-ray binaries, XRBs, HLX-1 and active galactic nuclei, AGNs), which is roughly consistent with the prediction of radiation-pressure instability of the accretion disk. These results imply that ``heartbeat" oscillations triggered by radiation-pressure instability may appears in different-scale BH systems.
Keywords： Astrophysics, Black hole physics, accretion disks, Active Galactic Nuclei

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