本地星系候选体的新视向速度
New optical velocities for local galaxy candidates
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中文总结 AI 辅助
利用6米BTA望远镜测定46个星系视向速度,发现12个新伴星、一颗卫星及两个可能在本地空洞内的星系,通过13颗NGC1068卫星数据估计星系群总质量为$(2.6\pm1.0)\times10^{12}\, M_\odot$。
中文摘要 AI 辅助
我们使用6米口径的BTA望远镜测定了46个先前被认为是近邻天体的星系的视向速度。其中12个星系的运动学距离在13兆秒差距以内,是明亮的本星系群星系(NGC1068、NGC2903、NGC4517、NGC4565、NGC4826)新的可能伴星。还发现了附近(10.38兆秒差距)类似小麦哲伦星系的矮星系DDO46的一颗新的微小卫星。两个孤立的不规则星系(dw1408 - 0802和Dw1552 - 1027)可能位于本地空洞内,后者光谱显示有丰富的发射线。利用13颗NGC1068卫星的视向速度和投影距离,估计该星系群总质量为$M=(2.6\pm1.0)\times10^{12}\, M_\odot$。
英文摘要
We used the 6-meter BTA telescope to determine radial velocities for 46 galaxies, previously considered to be nearby objects. Twelve of them have kinematic distances within 13Mpc and are new probable companions to the bright Local Volume galaxies: NGC1068, NGC2903, NGC4517, NGC4565, NGC4826. We also found a new tiny satellite of the nearby (10.38Mpc) SMC-like dwarf galaxy DDO46. Two isolated dIrr galaxies: dw1408-0802 and Dw1552-1027 are probably located inside the Local Void. The spectrum of the latter shows a rich set of emission lines. Using the radial velocities and projected separations of 13 NGC1068 satellites, we estimated the total mass of the group to be $M= (2.6\pm1.0)\times10^{12}\, M_\odot$.