论文标题
$ HUBBLE〜空间〜望远镜$揭示了与Centaurus的标志性尘埃车道上的脱衣舞超新星2016ADJ相关的壮观的灯回声
$Hubble~Space~Telescope$ Reveals Spectacular Light Echoes Associated with the Stripped-envelope Supernova 2016adj in the Iconic Dust Lane of Centaurus A
论文作者
论文摘要
我们提供了$ hubble〜空间〜望远镜$图像的多频序列，记录了多个光回声的出现和演变，该镜头与剥离的Envelope Supernova（SN）2016ADJ相关的Centaurus中央尘埃车道上的剥离 - Envelope Supernova（sn）Adjj a。 最大限度。通过$+$ 578 d延伸的其他HST图像覆盖了LE1的演变，而$+$ 1991 d拍摄的图像不仅显示了LE1，而且还显示了新的Inner Le Ring（LE2）的片段以及两个附加的外部LE环（LE3＆LE4）。 LE的角度半径采用单个散射形式主义，这表明它们源自SN前景中的离散灰尘表。这些信息，结合了散射表面的颜色和光学深度的测量，为一个场景提供了多片块状灰尘，其特征是不同程度的孔。在这种情况下，LE的角半径越大，其灰尘板的前景越远。但是，一个例外是LE2，它是由位于SN靠近SN的防尘板形成的，而不是产生LE1，LE3和LE4的防尘表。 LE2的延迟外观可以归因于其尘埃板沿SN和Earth之间的视线有一个明显的孔。
We present a multi-band sequence of $Hubble~Space~Telescope$ images documenting the emergence and evolution of multiple light echoes (LEs) linked to the stripped-envelope supernova (SN) 2016adj located in the central dust-lane of Centaurus A. Following point-spread function subtraction, we identify the earliest LE emission associated with a SN at only $+$34 days (d) past the epoch of $B$-band maximum. Additional HST images extending through $+$578 d cover the evolution of LE1 taking the form of a ring, while images taken on $+$1991 d reveals not only LE1, but also segments of a new inner LE ring (LE2) as well as two additional outer LE rings (LE3 & LE4). Adopting the single scattering formalism, the angular radii of the LEs suggest they originate from discrete dust sheets in the foreground of the SN. This information, combined with measurements of color and optical depth of the scattering surfaces, informs a scenario with multiple sheets of clumpy dust characterized by a varying degree of holes. In this case, the larger the LE's angular radii, the further in the foreground of the SN its dust sheet is located. However, an exception to this is LE2, which is formed by a dust sheet located in closer proximity to the SN than the dust sheets producing LE1, LE3, and LE4. The delayed appearance of LE2 can be attributed to its dust sheet having a significant hole along the line-of-sight between the SN and Earth.
