论文标题
KK 69的新观察结果。KK69矮星系中的矮星系？
New HI observations of KK 69. Is KK 69 a dwarf galaxy in transition?
论文作者
论文摘要
我们介绍了矮星系KK 69的新数据，该数据是用巨大的Metrewave射电望远镜（GMRT）获得的，其信噪比几乎是先前观察结果的两倍。我们进行了高斯光谱分解和堆叠方法，以鉴定HI气体的冷中性培养基（CNM）和温暖的中性培养基（WNM）。我们发现总HI气体的30％对应于大约的质量。 10^7 mo，处于CNM相。 KK 69中HI的分布不是对称的。我们的GMRT HI强度图69覆盖在哈勃太空望远镜图像上，显示了大约的偏移。高密度区域和恒星体之间的4 kpc，表明它可能是矮人的过渡星系。偏移量以及HI身体的潜在截断是与中央组螺旋星系NGC 2683相互作用的证据，表明HI气体正在从KK 69中剥离。此外，我们发现了该组的矮星银行成员的矮小型HI，以及可能位于ngc 2683的Neort-Eascerthe ne Eascerty附近的矮星系成员，以及可能的新星系。
We present new HI data of the dwarf galaxy KK 69, obtained with the Giant Metrewave Radio Telescope (GMRT) with a signal-to-noise ratio that almost double previous observations. We carried out a Gaussian spectral decomposition and stacking methods to identify the cold neutral medium (CNM) and the warm neutral medium (WNM) of the HI gas. We found that 30% of the total HI gas, which corresponds to a mass of approx. 10^7 Mo, is in the CNM phase. The distribution of the HI in KK 69 is not symmetric. Our GMRT HI intensity map of KK 69 overlaid onto a Hubble Space Telescope image reveals an offset of approx. 4 kpc between the HI high-density region and the stellar body, indicating it may be a dwarf transitional galaxy. The offset, along with the potential truncation of the HI body, are evidence of interaction with the central group spiral galaxy NGC 2683, indicating the HI gas is being stripped from KK 69. Additionally, we detected extended HI emission of a dwarf galaxy member of the group as well as a possible new galaxy located near the north-eastern part of the NGC 2683 HI disk.
