CATALOG OF OBSERVED TANGENTS TO THE SPIRAL ARMS IN THE MILKY WAY GALAXY
نویسندگان
چکیده
منابع مشابه
Molecular Gas, Kinematics, and Ob Star Formation in the Spiral Arms of the Southern Milky Way
The rotation curve for the IV galactic quadrant, within the solar circle, is derived from the Columbia University U. de Chile CO(J=1→0) survey of molecular gas. A new sampling, four times denser in longitude than in our previous analysis, is used to compute kinematical parameters that require derivatives w/r to galactocentric radius; the angular velocity Ω(R), the epicyclic frequency κ(R), and ...
متن کاملBower HI Mapping of the Spiral Arms of the Milky Way
The 21-cm line refers to the spectral line created by changes in the energy state of hydrogen and occurs at approximately 1420.405 MHz. Because this line appears in the microwave, it can easily penetrate dust and interstellar smoke which plagued optical astronomers for centuries. Because the universe in extensively comprised of neutral hydrogen, observing it at this frequency becomes a superior...
متن کاملThe Spiral Arms and Interarm Separation of the Milky Way: an Updated Statistical Study
Measurements of the spiral arms (their pitch angle, number, shape, and the interarm separation) in the Milky Way have been published in the period from 1980 to early 2005, using different methods that yielded slightly or widely differing values, depending on hidden or unknown biases. A meta-analysis would be useful for searching for trends among these individual studies. First, we find a conver...
متن کاملfrom linguistics to literature: a linguistic approach to the study of linguistic deviations in the turkish divan of shahriar
chapter i provides an overview of structural linguistics and touches upon the saussurean dichotomies with the final goal of exploring their relevance to the stylistic studies of literature. to provide evidence for the singificance of the study, chapter ii deals with the controversial issue of linguistics and literature, and presents opposing views which, at the same time, have been central to t...
15 صفحه اولChemodynamical Simulations of the Milky Way Galaxy
We present chemodynamical simulations of a Milky Way-type galaxy using a selfconsistent hydrodynamical code that includes supernova feedback and chemical enrichment, and predict the spatial distribution of elements from Oxygen to Zinc. In the simulated galaxy, the kinematical and chemical properties of the bulge, disk, and halo are consistent with the observations. The bulge formed from the ass...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal Supplement Series
سال: 2014
ISSN: 1538-4365
DOI: 10.1088/0067-0049/215/1/1