[PDF] Top 20 Mass extinction and the structure of the Milky Way

... up-to-date Milky Way model and solar orbit data in order to test the hypothesis that the Sun’s galactic spiral arm crossings cause mass extinction events on ...the Milky Way’s spiral ... See full document

... Chapter 5 contains a summary of the results obtained in chapters 2, 3, and 4. From the studies carried out, the distances of the stellar groupings are incorporated with those of other population I objects to define more ... See full document

... additional blurring of our data that are already affected by the parallax and hence magnitude er- rors of Hipparcos as well as photometry errors and scatter in the results by too small subsample sizes. In the top panel ... See full document

... 5 A searh for stellar tidal debris of defunt dwarf galaxies around globular lusters in the inner Galati halo 103 5.1 Introdution... 148.[r] ... See full document

... The results from the Hipparcos mission are a powerful demonstration of the value of high accuracy all-sky astrometry for studies of the structure and formation history of the Milky Way. The results ... See full document

... Simulating the Milky-Way (MW) Galaxy as an N-body sys- tem without gas is an important step in understanding its structure, kinematics, and dynamics. The complex struc- tures of the Galactic disc ... See full document

... Taken together, the CO spectra and spatial separation of the ap- proaching and receding velocity components provide reasonable evi- dence for rotation in the z = 1.2 − 1.3 galaxies in our sample. While the presence of ... See full document

... The Milky Way bulge provides an important laboratory to investigate the imprints of how the Galaxy formed and ...of extinction limitations, early studies of the bulge were restricted to Baade’s ... See full document

... During the last four decades it has become clear that our Galaxy is a barred system (see ref. [1]). From start counts, [2–4] found a boxy bulge of ∼ 2 kpc length, with an orientation of ∼ 20 ◦ –25 ◦ . When going toward ... See full document

... Is the Smith Cloud a solitary object or might it be part of a larger structure? To examine this we have recently observed a large region of the sky “ahead” of the Smith Cloud in the 21cm line with the GBT. Figure ... See full document

... reproducible and can be used to describe a large percentage of the stars in the sky. It is possible to calibrate the luminosity and temperature classes directly in terms of absolute magnitude and effective temperature. ... See full document

... One of the most important outcome of the project is the OGLE Collection of Variable Stars (OCVS). It currently consists of almost a million well characterized periodic variable stars of many different types ([9]). The ... See full document

... Variable stars have a long tradition of being an excellent tool for studying the content and structure of stellar systems. RR Lyrae stars are not only excellent standard candles, but they also trace the old ... See full document

... (Majewski et al., 2000, 2005), although these features are not so prominent in more recent work (McMonigal et al., 2014). Sculptor is another dwarf spheroidal which may (Westfall et al., 2006), or may not (Coleman et ... See full document

... the Milky Way is a multidisciplinary collaboration among three senior artists; myself as writer/performer, Floyd Favel as director and Kuna visual artist Oswaldo (Achu) De- Leon Kantule as painter, design ... See full document

... The first low frequency (26.1 MHz) CRRL was detected in absorption to- wards the supernova remnant Cas A by Konovalenko and Sodin (1980) and it was wrongly attributed to a hyperfine structure line of 14 N ... See full document

... complex structure in the primary beams of the antennas did not impart a significant amount of noise to the phases and the delay beam did not suppress significantly off-axis ... See full document

... the Milky Way. One way to then ex- plain the high bulge/disk annihilation ratio is that some disk positrons find their way into the Galactic bulge before they ...field structure of the ... See full document

... The Kepler mission [1] has been observing more than 197,000 stars for almost 4 years [2]. While the mission has been a success for its main goal in terms of looking for extrasolar planets and characterizing them (for ... See full document

... the extinction features must have a projected length of > ∼ 1 ◦ ; and 2) the group members, in pairs of two persons, must independently confirm the extinction feature as a filament- like ...the ... See full document