The Distance and Motion of the Maffei Group

被引：14
|
作者：
Anand, Gagandeep S. [1 ]
Tully, R. Brent [1 ]
Rizzi, Luca [2 ]
Karachentsev, Igor D. [3 ]
机构：
[1] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA
[2] WM Keck Observ, 65-1120 Mamalahoa Highway, Kamuela, HI 96743 USA
[3] Special Astrophys Observ, Nizhniy Arkhyz 369167, Karachai Cherke, Russia
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2019年 / 872卷 / 01期
基金：
美国国家航空航天局;
关键词：
distance scale; galaxies: distances and redshifts; galaxies: groups: individual (Maffei); galaxies: stellar content; Hertzsprung-Russell and C-M diagrams; RED GIANT BRANCH; TIP;
D O I：
10.3847/2041-8213/aafee6
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
It has recently been suggested that the nearby galaxies Maffei 1 and 2 are farther in distance than previously thought, such that they no longer are members of the same galaxy group as IC 342. We reanalyze near-infrared photometry from the Hubble Space Telescope, and find a distance to Maffei. 2 of 5.73 +/- 0.40 Mpc. With this distance, the Maffei Group lies 2.5 Mpc behind the IC 342 Group and has a peculiar velocity toward the Local Group of -128 +/- 33 km s(-1). The negative peculiar velocities of both of these distinct galaxy groups are likely the manifestation of void expansion from the direction of Perseus-Pisces.
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页数：5
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