The optical gravitational lensing experiment: Deep photometry of the Sagittarius dwarf spheroidal galaxy
نویسندگان
چکیده
منابع مشابه
The exotic chemical composition of the Sagittarius dwarf Spheroidal galaxy
Context. The Sagittarius dwarf Spheroidal Galaxy is the nearest neighbor of the Milky Way. Moving along a short period quasi-polar orbit within the Halo, it is being destroyed by the tidal interaction with our Galaxy, losing its stellar content along a huge stellar stream. Aims. We study the detailed chemical composition of 12 giant stars in the Sagittarius dwarf Spheroidal main body, together ...
متن کاملThe Planetary Nebula population of the Sagittarius Dwarf Spheroidal Galaxy
The identification of two new Planetary Nebulae in the Sagittarius Dwarf Spheroidal Galaxy (Sgr) is presented. This brings the total number to four. Both new PNe were previously classified as Galactic objects. The first, StWr 2-21, belongs to the main body of Sgr, from its velocity and location. The second, the halo PN BoBn 1, has a location, distance and velocity in agreement with the leading ...
متن کاملHI observations towards the Sagittarius dwarf spheroidal galaxy
We have measured the λ21 cm line of Galactic H i over more than 50 square degrees in the direction of the Sagittarius dwarf spheroidal galaxy. 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. Nor do the H i data show evidence for any ...
متن کاملMetallicity gradients in the Sagittarius dwarf spheroidal Galaxy
Metallicity gradients in the Sagittarius dwarf Galaxy (Sgr) are investigated by using infrared photometric data from the 2MASS survey. To search for metallicity effects, the giant branch in a field situated near the Center of the Sgr is compared to the giant branch in a field situated near its southern edge. The contamination of the Sgr giant branch by foreground Galactic stars is canceled by s...
متن کاملBlue Horizontal Branch Stars in the Sagittarius dwarf spheroidal galaxy
We report on the recovery of a Blue Horizontal Branch (BHB) population belonging to the Sagittarius Dwarf Spheroidal Galaxy (Sgr). The sequence is clearly identified in the (V, V-I) Color Magnitude Diagram (CMD) obtained for about 500,000 stars in the region of the globular cluster M 54. The BHB morphology is similar to the analogous sequence in M 54, but it is unambiguously associated with Sgr...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1995
ISSN: 0004-6256
DOI: 10.1086/117303