... At present Ibata et al. (2001) base their analysis of the Sagittarius stream on only 38 Carbon stars, inferring from their apparent distribution on a great circle on the sky and a comparison with numerical simulations that the dark halo must be nearly ...
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Ссылки http://www.mso.anu.edu.au/~kcf/surya/spiralstructure/Gerhard02 -- 285.1 Кб -- 13.05.2006 Похожие документы
... In particular, the RR Lyrae distribution has been utilised to rule out the possibility that the lenses are located in a hitherto undetected intervening dwarf galaxy, similar to the Sagittarius dwarf. ...
... This process continues today, with the accretion of the Sagittarius dSph galaxy into the halo of our own Galaxy being a prime example (Ibata, Gilmore, & Irwin 1994). ...
... isolated, and are subject to numerous small perturbations from infalling dwarf galaxies as well as the passage of larger galaxies at greater distance; e.g., the Milky Way today has the Sagittarius dwarf, the Magellanic Clouds, and other dwarf companions ...
... They have detected a concentration of giants at 50 kpc and at 80 kpc: the radial velocities of these giants indicate that they are part of the disrupting Sagittarius dwarf galaxy, whose center is 60 degrees away. ...
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Ссылки http://www.mso.anu.edu.au/annualReport/2001/annrep_2001.pdf -- 398.8 Кб -- 15.10.2004 Похожие документы
... This merger and accretion process continues to the present day: for example, the Sagittarius dwarf spheroidal galaxy (dSph) is currently being disrupted by the gravitational field of the Galaxy and will be completely absorbed into the Galatic halo in a ...
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Ссылки http://www.mso.anu.edu.au/annualReport/2004/RSAA_AR2004.pdf -- 1673.3 Кб -- 11.04.2006 Похожие документы