منابع مشابه
The Galactic Bulge
The Galactic bulge is the least studied component of our Galaxy. Yet, its formation and evolution are key to understand the formation of the Galaxy itself. Studies on the Galactic bulge have increased significantly in the last years, but still there are many points of controversy. This volume contains several contributions from experts in different aspects of the bulge. Issues discussed include...
متن کاملBulge Formation
The currently discussed theories of bulge formation are reviewed, including the pri-mordial scenario, where bulges form rapidly and then accrete disks, the secular scenario, where bulges are formed by dynamical evolution of disks through bars and galaxy interactions , and some combinations of both, where formation of bulges and disks are more continuous and interleaved. The various scenarios ma...
متن کاملAnother Bar in the Bulge
A map of the projected density of the old stellar population of the Galactic Bulge region is reconstructed using 2MASS data. By making a combination of the H and K photometric bands , it is possible to overcome the effect of reddening, and thus penetrate the inner structure of the Galactic Bulge. The main structure in the map corresponds to the well documented peanut shaped bar which is formed ...
متن کاملComposition of the Galactic Bulge
We present detailed abundance results for 9 Galactic bulge stars in Baade’s Window, based on HIRES (R=45,000–60,000) spectra taken with the Keck I telescope. The alpha elements show non-uniform enhancements relative to the solar neighborhood trends: Mg and Si are enhanced in all our bulge stars by ∼0.5–0.3 dex, showing a slight decrease with increasing [Fe/H]. Oxygen is enhanced in most bulge s...
متن کاملVaginal Bulge
PATIENT PRESENTATION A 61-year-old female presented to the emergency department complaining of constipation and vaginal bulge with valsalva 89 days after a robotic-assisted hysterectomy. The patient had intercourse three days prior to presentation and experienced postcoital abdominal discomfort with vaginal bleeding. She denied any other trauma. She had no other complaints and denies fevers, ch...
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ژورنال
عنوان ژورنال: Science
سال: 2011
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.332.6034.1128-a