Satellites around Edge-on Galaxies. I. Dynamical Masses

被引:0
作者
Smirnov, D. V. [1 ]
Makarov, D. I. [2 ]
Karachentsev, I. D. [2 ]
机构
[1] St Petersburg State Univ, St Petersburg 199034, Russia
[2] Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
基金
俄罗斯科学基金会;
关键词
galaxies: groups: general; galaxies: haloes; galaxies: spiral; DARK-MATTER; DWARF GALAXIES; DATA RELEASE; CATALOG; SYSTEMS; PLANE;
D O I
10.1134/S1990341323600230
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have undertaken a search for satellites around edge-on galaxies in the EGIPS catalog, which contains 16 551 objects with declinations above -30(degrees). We searched for systems with a central galaxy dominating in brightness by at least 1(m) compared to its companions. As a result, we discovered 1097 candidate satellites around 764 EGIPS galaxies with projected distances less than 500 kpc and a radial velocity difference less than 300 km s(-1). Of these, 757 satellites around 547 central galaxies have radial velocity accuracies higher than 20 km s(-1) and satisfy the gravitationally bound condition. The ensemble of satellites is characterized by an average projected distance of 84 kpc and an average radial velocity dispersion of 103 km s(-1). Treating small satellites as test particles moving on isotropic orbits around central EGIPS galaxies, we determined the projected (orbital) masses of the edge-on galaxies. Within the luminosity range of 1.3x10(10) to 42x10(10) L-circle dot, the total mass of the systems is well described by a linear dependence logM(p) proportional to 0.88log < L-Kg with an average total mass-to-K-band luminosity equal to (17.5 +/- 0.8)M-circle dot/L-circle dot, which is typical for nearby spiral galaxies such as the Milky Way, M 31 and M 81.
引用
收藏
页码:487 / 498
页数:12
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