arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1002.3625astro-ph.HE
收藏

ESO243-49中质量黑洞的Chandra和Swift跟踪观测

Chandra and Swift Follow-up Observations of the Intermediate Mass Black Hole in ESO243-49

N. A. Webb, D. Barret, O. Godet, M. Servillat, S. A. Farrell, S. R. Oates

摘要:

ESO 243 - 49星系中最亮的超亮X射线源HLX-1为中等质量黑洞的存在提供了强有力的证据。由于亮度和质量的估计取决于HLX-1与ESO 243 - 49的关联,因此确认它的关联至关重要。这需要在X射线以外的波长进行后续调查,这反过来又需要改进源位置。为了进一步加强中等质量黑洞的识别,有必要确定HLX-1的环境,以确定它是否有可能在观测到的光度下形成和滋养黑洞。利用Chandra上的高分辨率相机,我们确定了RA = 01h10m28.3s和Dec =-46d04 '22.3 "的源位置。通过将野外3个X射线源的位置与2MASS星表进行交叉匹配,发现保守的95%误差为0.3 "。结合所有的雨燕紫外/光学望远镜uvw2图像,我们未能检测到在钱德拉位置的紫外源下降到3sigma极限的20.25马格。然而,有证据表明,紫外线发射是在HLX-1的方向拉长。GALEX的档案数据支持了这一点,并表明远紫外辐射比近紫外辐射强。这可能意味着HLX-1可能位于恒星形成区的边缘附近。使用最新的X射线观测,我们推导出质量吸积率的500 Msun的黑洞所观察到的光度,并表明,这是兼容的,这样的环境。

英文摘要:

The brightest Ultra-Luminous X-ray source HLX-1 in the galaxy ESO 243-49 provides strong evidence for the existence of intermediate mass black holes. As the luminosity and thus the mass estimate depend on the association of HLX-1 with ESO 243-49, it is essential to confirm its affiliation. This requires follow-up investigations at wavelengths other than X-rays, which in-turn needs an improved source position. To further reinforce the intermediate mass black hole identification, it is necessary to determine HLX-1's environment to establish whether it could potentially form and nourish a black hole at the luminosities observed. Using the High Resolution Camera onboard Chandra, we determine a source position of RA=01h10m28.3s and Dec=-46d04'22.3". A conservative 95% error of 0.3" was found following a boresight correction by cross-matching the positions of 3 X-ray sources in the field with the 2MASS catalog. Combining all Swift UV/Optical Telescope uvw2 images, we failed to detect a UV source at the Chandra position down to a 3sigma limiting magnitude of 20.25 mag. However, there is evidence that the UV emission is elongated in the direction of HLX-1. This is supported by archival data from GALEX and suggests that the far-UV emission is stronger than the near-UV. This could imply that HLX-1 may be situated near the edge of a star forming region. Using the latest X-ray observations we deduce the mass accretion rate of a 500 Msun black hole with the observed luminosity and show that this is compatible with such an environment.

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。

↑