0 The saturation of disk heating in the solar neighborhood and evidence for a merger 10 Gyrs ago Alice
نویسنده
چکیده
منابع مشابه
The saturation of disk heating in the solar neighborhood and evidence for a merger 9 Gyrs ago
We reexamine the age-velocity dispersion relation in the solar neighborhood using improved stellar age estimates that are based on Hipparcos parallaxes and recent stellar evolution calculations. The resulting relation shows that the Milky Way stellar disk was relatively quiescent, suffering little heating or dispersion increase between 3 and 9 Gyrs. However, at an age of 9 ± 1 Gyrs there is an ...
متن کاملThe saturation of disk heating in the solar neighborhood and evidence for a merger 10 Gyrs ago
We reexamine the age-velocity dispersion relation in the solar neighborhood using improved stellar age estimates that are based on Hipparcos parallaxes and recent stellar evolution calculations. The resulting relation shows that the Milky Way stellar disk was relatively quiescent, suffering little heating or dispersion increase between 3 and 10 Gyrs. However, at an age of 10 Gyrs there is an ab...
متن کاملSizing of a Packed Bed Storage for Solar Air Heating Systems (TECHNICAL NOTE)
Packed bed units generally, represent the most suitable storage units for air heating solar systems. In these systems the storage unit receives the heat from the collector during the collection period and discharges the heat to the building at the retrieval process. A method for sizing of packedbed storage in an air heating system is represented. The design is based on the K-S curves, which hav...
متن کاملOperational trends of a mini parabolic solar collector for agricultural purposes in a non-active solar environment
The mode of operation of mini parabolic solar panels made of germanium, mild steel and aluminium were investigated experimentally, as means of providing heated water on a farmland; the process was also modelled. Angular adjustments of the solar collectors from 70-90o were adopted in order to determine, the best material of construction for the parabolic solar collector and the angular orientati...
متن کاملPerformance Study of a Solar Integrated Central Heating System of a Residential Building Using Trnsys- an Hourly Simulation Model (RESEARCH NOTE)
In this investigation, the performance of an existing heating system of a residential building incorporated with an array of solar thermal collectors was studied. For this purpose, transient systems simulation program model was assembled to estimate the hour-by-hour performance of the existing and the system equipped with the solar thermal collectors in terms of the provided space air condition...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2000