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Astronomy Matters For Chemistry Teachers, Terry Smith, Jay Huebner, Robert Vergenz
Astronomy Matters For Chemistry Teachers, Terry Smith, Jay Huebner, Robert Vergenz
Jay S Huebner
The purpose of this paper is to encourage more chemistry teachers to become familiar with some of the basic ideas described in typical introductory astronomy courses (1 - 9), including those about the origin of elements and forms of matter. These ideas would enrich chemistry courses and help resolve some basic misconceptions that are expressed in many introductory texts (10 - 16) and journal articles for chemistry teachers (17, 18). These misconceptions are typified by statements such as "we can classify all substances as either elements or compounds," and "nature has provided 92 elements out of which all matter is …
Equatorial Wind Compression Effects Across The H-R Diagram., R. Ignace, J. P. Cassinelli
Equatorial Wind Compression Effects Across The H-R Diagram., R. Ignace, J. P. Cassinelli
Richard Ignace
We investigate the degree to which moderate stellar rotation rates can influence the two-dimensional density structure in the winds of four classes of stars: WoIf-Rayet, B[e], asymptotic giant branch (AGB), and novae. These classes are distributed across the H-R diagram and have a wide range of escape speeds and wind acceleration. Furthermore, all have members which possess asymmetric circumstellar nebulae. It has been suggested that these asymmetries could result from stellar winds which have moderate equatorial density enhancements. Large enhancements may arise as the result of stellar rotation as demonstrated by the wind-compressed disk (WCD) model of Bjorkman & Cassinelli. …