Essays about: "galaxy mergers"
Showing result 1 - 5 of 14 essays containing the words galaxy mergers.
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1. The quest for a classical bulge - a study of kinematics, abundances, and ages using microlensed dwarf stars and Gaia
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : Context: We present an kinematical analysis of 90 F and G type dwarf, turn-off, and subgiant stars in the Galactic bulge. These stars were observed with high-resolution spectrographs during gravitational microlensing events This allowed for their ages, abundances, and radial velocities to be ascertained while they were significantly brighter. READ MORE
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2. Hyper-velocity stars from globular clusters hosting intermediate-mass black holes
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : In 1988 Hills proposed that stars can gain velocities above 500 km s−1 if they are in a stellar binary which gets disrupted by a super massive black hole (SMBH). One of the stars would get trapped in an elliptical orbit around the SMBH while the other gets ejected and obtains a relatively high velocity. READ MORE
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3. Finding stars that are likely to be from accreted satellite galaxies
University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionenAbstract : The Milky Way galaxy has through its lifetime merged with several smaller galaxies in its surroundings. Merger events like these play an important role in the formation of galaxies and are therefore of great interest to better our understanding of galaxy formation. READ MORE
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4. Searching for direct collapse black holes using the James Webb Space Telescope
University essay from Uppsala universitet/Institutionen för fysik och astronomiAbstract : Recent detections of massive quasars at z > 6 has proven to be an interesting challengefor cosmology given the short time frame that these objects have to reach a certainmass via conventional methods (e.g., galaxy mergers). READ MORE
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5. Colliding Galaxies in a (Nut)Shell
University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionenAbstract : Galaxy interactions and mergers are natural recurring events in the current cosmological paradigm, events that often coincide with starbursts and enhanced star formation activity. To understand why that is, one can use idealised (non-cosmological) merger simulations, which provide freedom to recreate specific tidally distorted galaxies, and analysis of the time evolution and underlying physics of the star formation activity at a high spatial resolution. READ MORE