论文标题
矮人Galaxy SDSS J090613.77+561015.2在中央中间质量黑洞推出的Parsec尺度无线电飞机？
A parsec-scale radio jet launched by the central intermediate-mass black hole in the dwarf galaxy SDSS J090613.77+561015.2?
论文作者
论文摘要
附近矮星系中的中间质量黑洞（IMBH）人口在探索早期宇宙的黑洞形成和增长方面起着重要的“地面真相”作用。在矮椭圆星系SDSS J090613.77+561015.2（z = 0.0465）中，光学和X射线观察结果已经揭示了一个积聚的IMBH。为了搜索与IMBH相关的可能的无线电核心和喷气机，我们对1.66 GHz的欧洲VLBI网络（EVN）进行了很长的基线干涉法（VLBI）观察。我们的成像结果表明，有两个1-MJY组件，分隔约为52个MAS（投影距离47 PC），而更紧凑的组件位于光学质心的1-sigma误差圆与可用的Gaia Astrometrestry中。根据它们的位置，细长的结构和相对较高的亮度温度，以及宿主星系中没有星星形成活性，我们认为无线电形态起源于中央IMBH驱动的喷气活动。大规模喷射的存在表明，黑洞生长的早期时代可能发生剧烈的喷气活动，从而有助于调节黑洞和星系的共同进化。
The population of intermediate-mass black holes (IMBHs) in nearby dwarf galaxies plays an important "ground truth" role in exploring black hole formation and growth in the early Universe. In the dwarf elliptical galaxy SDSS J090613.77+561015.2 (z=0.0465), an accreting IMBH has been revealed by optical and X-ray observations. Aiming to search for possible radio core and jet associated with the IMBH, we carried out very long baseline interferometry (VLBI) observations with the European VLBI Network (EVN) at 1.66 GHz. Our imaging results show that there are two 1-mJy components with a separation of about 52 mas (projected distance 47 pc) and the more compact component is located within the 1-sigma error circle of the optical centroid from available Gaia astrometry. Based on their positions, elongated structures and relatively high brightness temperatures, as well as the absence of star-forming activity in the host galaxy, we argue that the radio morphology originates from the jet activity powered by the central IMBH. The existence of the large-scale jet implies that violent jet activity might occur in the early epochs of black hole growth and thus help to regulate the co-evolution of black holes and galaxies.
