We have measured the 21-cm line of Galactic HI over more than 50 square degrees in the direction of the Sagittarius dwarf spheroidal galaxy. "The evidence seems to be the merger rate was higher early in the history of the universe than now."

Not to be confused with the Sagittarius Dwarf Irregular Galaxy (SagDIG), SagDEG is the Milky Way's nearest known neighbor and comprised of mostly old, yellowish stars. The data show no evidence of HI associated with the dwarf spheroidal which might be consider analogous to the Magellanic Stream as it is associated in both position and velocity with the Large Magellanic Cloud.

Numerical models of the tidal disruption of the Sagittarius (Sgr) dwarf galaxy have recently been developed that for the first time simultaneously satisfy most observational constraints on the angular position, distance, and radial velocity trends of both leading and trailing tidal streams emanating from the dwarf. The stellar content of the Sagittarius Dwarf Galaxy? The Sagittarius dwarf galaxy subtends an angle of ~10 deg on the sky, lies at a distance of 24 kpc and is comparable in size and luminosity to the largest dwarf spheroidal, Fornax. However, its position about 16 Kpc behind the (1994).

We have measured the lambda 21 cm line of Galactic {H i} over more than 50 square degrees in the direction of the Sagittarius dwarf spheroidal galaxy. The destroyed Sagittarius dwarf galaxy was long ago torn into streams that wrap around the Milky Way. They're clearly visible in this partial map of the sky.

The data show no evidence of {H i} associated with the dwarf spheroidal which might be consider analogous to the Magellanic Stream as it is associated in both position and velocity with the Large Magellanic Cloud. G. Marconi 1 , R. Buonanno , M. Castellani ; 2 , G. Iannicola 1 , P. Molaro 3 ,L. Pasquini 4 , and L. Pulone 1 Osservatorio Astronomico di Roma, Via dell’Osservatorio 2, Monte Porzio Catone, I-00040 Roma, Italy ered in the constellation of Sagittarius by Ibata et al. In terms of stellar populations it most closely resembles the Fomax dwarf, having a strong intermediate-age stellar component with evidence of a metallicity spread. Introduction Sagittarius is the closestof the nine Galactic dwarf spheroidals; in fact it is the closest galaxy, which A dwarf spheroidal galaxy was recently discov-facilitates the detailed study of its individual stars. In fact we are already in collision with a small galaxy, the Sagittarius Dwarf. The colors indicate the distances to the stars identified in the study - stars located in red areas are further away, while stars in the blue areas are closer. We have discovered a new Galactic satellite galaxy in the constellation of Sagittarius.