3C 273 host galaxy with Hubble Space Telescope coronagraphy⋆,Astronomy & Astrophysics

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3C 273 host galaxy with Hubble Space Telescope coronagraphy⋆
Astronomy & Astrophysics ( IF 6.5 ) Pub Date : 2024-03-01 , DOI: 10.1051/0004-6361/202348254
Bin B. Ren , Kevin Fogarty , John H. Debes , Eileen T. Meyer , Youbin Mo , Dimitri Mawet , Marshall D. Perrin , Patrick M. Ogle , Johannes Sahlmann

The close-in regions of bright quasars’ host galaxies have been difficult to image due to the overwhelming light coming from quasars. With coronagraphic observations in visible light using the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope, we removed 3C 273 quasar light using color-matching reference stars. The observations revealed the host galaxy from 60″ to 0.″2 with nearly full angular coverage. Isophote modeling has revealed a new core jet, a core blob, and multiple smaller-scale blobs within 2.″5. The blobs could potentially be satellite galaxies or infalling materials towards the central quasar. Using archival STIS data, we constrained the apparent motion of its large scale jets over a 22 yr timeline. By resolving the 3C 273 host galaxy with STIS, our study validates the use of coronagraphs on extragalactic sources for obtaining new insights into the central (at ∼kpc scales) regions of quasar hosts.

中文翻译：

哈勃太空望远镜日冕摄影术的 3C 273 宿主星系⋆

由于来自类星体的强烈光线，明亮类星体所在星系的近距离区域很难成像。通过使用哈勃太空望远镜上的太空望远镜成像摄谱仪 (STIS) 在可见光下进行日冕观测，我们使用颜色匹配参考星去除了 3C 273 类星体光。观测结果显示主星系从 60″ 到 0.″2 几乎全角覆盖。等光度模型揭示了一个新的核心射流、一个核心斑点和 2.“5. 范围内的多个较小规模的斑点。这些斑点可能是卫星星系或向中央类星体坠落的物质。使用 STIS 档案数据，我们限制了其大型喷流在 22 年时间内的视运动。通过用 STIS 解析 3C 273 宿主星系，我们的研究验证了日冕仪在河外源上的使用，以获得对类星体宿主中心（~kpc 尺度）区域的新见解。

更新日期：2024-03-01

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PDF https://arxiv.org/pdf/2402.09505

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