We present the first sample of quasi-stellar objects (QSOs) behind the southern satellite galaxies of the Milky Way. These objects were sought for use as unresolved, inertial reference objects in proper motion studies of the Fornax, Carina and Sculptor dwarf spheroidal galaxies and the Small Mage...
One tail trails the star cluster, the other pulls out ahead of it. They are known as tidal tails, and have been widely studied in colliding galaxies but no one had ever seen them from a nearby open star cluster, until very recently. The key to detecting tidal tails is spotting which ...
There are 9 dwarf spheroidal galaxies in the neighbourhood of the Galaxy. The last to be discovered is in Sagittarius (Ibata et al 1994), situated at a dis... AA Zijlstra,G Dudziak,JR Walsh - Springer Netherlands 被引量: 26发表: 1997年 The Three Dimensional Shape of the Sagittarius Dwa...
earth seemed to be just a small bit of dust.It is only a small planet,and travels around the sun.The sun together with its planets,travels in the Milky Way,our galaxy.The Milky Way has about thirty billion stars like our sun,and is one of about a hundred million galaxies in the ...
Distances to celestial bodies are crucial in astronomy. They allow astronomers to understand the structure of the Universe; for example, to see the organization of the Solar System and to recognize that galaxies lie beyond the Milky Way. The derived physical sizes of bodies scale with the ...
Using the "Updated Nearby Galaxy Catalog", we consider different properties of companion galaxies around luminous hosts in the Local Volume. The data on stellar masses, linear diameters,surface brightnesses, HI-richness, specific star formation rate (sSFR), and morphological types are discussed for ...
Astronomers using NASA's Hubble Space Telescope have found that Markarian 231 (Mrk 231), the nearest galaxy to Earth that hosts a quasar, is powered by two central black holes furiously whirling about each other. The finding suggests that quasars—the brilliant cores of active galaxies—may co...
Ongoing star formation in the Milky Way requires continuous gaseous fuel from accretion. Previous work has suggested that the accretion of dwarf galaxies c... JEG Peek - 《Physics》 被引量: 22发表: 2009年 Spatial and kinematical lopsidedness of atomic hydrogen in the Ursa Major group of galax...
galaxies: evolution — galaxies: stellar content — galaxies: Magellanic Clouds — galaxies: interactions 1. INTRODUCTION Interactions are known to be an important driver of galaxy evolution, but a detailed understanding of their influence remains elusive. The Magellanic Clouds are a particularly com...
A. A. Suchkov,Galaxies-Well-Known and Mysterios(Nauka, Moscow, 1978) [in Russian]. Google Scholar A. A. Suchkov and Yu. A. Shchekinov, “Note on star formation by gravitational fragmentation,” Astron. Zh.52, 662–664 (1975).