Secondary age


  • Webster's Revised Unabridged Dictionary
    • Secondary age (Geol) The Mesozoic age, or age before the Tertiary. See Mesozoic, and Note under Age n., 8.
    • ***


In literature:

A secondary reason may be found in the nature of the age itself, which was intensely emotional.
"English Literature" by William J. Long
Secondary Age: { Cretaceous } Age of Reptiles { Jurassic } with at least twenty Periods.
"Atlantic Monthly, Vol. XII. July, 1863, No. LXIX." by Various
I have already pointed out that in girls the secondary sexual characters begin to make their appearance at an earlier age than in boys.
"The Sexual Life of the Child" by Albert Moll
Candidates for admission to these schools must be over 17 years of age and have completed the secondary school course.
"The Empire of the East" by H. B. Montgomery
The influence of age and heredity may be considered as secondary or predisposing causes.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
The Secondary Era may be called the age of reptiles.
"The Geological Story of the Isle of Wight" by J. Cecil Hughes
There is only slight individual variation, slight variation with age, and no secondary sexual variation.
"Speciation and Evolution of the Pygmy Mice, Genus Baiomys" by Robert L. Packard
Table showing the ages of pupils in State and Communal Secondary Schools.
"The School System of Norway" by David Allen Anderson

In news:

The University of Georgia is starting a graduate degree program this fall that will prepare educators to work with secondary-age students with autism.
There are a lot of great reasons to get a netbook, either as a replacement for an aging laptop or as a secondary portable for trips when you want to travel light.

In science:

Theoretical isochrones for solar-metallicity instantaneous burst BSPs at an age of 1 Gyr (solid circles for the primary, open for the secondary).
Evolutionary Population Synthesis for Binary Stellar Populations
Gyrochronology suggests that the system has an age of approximately 9 Gyr (Barnes 2010) and implies further that the secondary is likely slowly rotating and should, therefore, not shown signs of strong magnetic activity or an in flated radius. A third system also appears to defy the current hypothesis.
Reevaluating the Mass-Radius Relation for Low-Mass, Main Sequence Stars
Binary systems can be used to break this degeneracy and provide examples of L-dwarfs with estimated masses as follows: assuming that the primary and low-mass companion in a system are coeval, age estimates from the primary can be adopted for the secondary.
Three Wide-Separation L dwarf Companions from the Two Micron All Sky Survey: Gl 337C, Gl 618.1B, and HD 89744B
If this preponderance of secondaries should prove to be true of Mars as well, it would affect estimates of the ages of various parts of the surface based on crater numbers.
Astrophysics in 2006
He completed secondary school (Liceo-Ginnasio Statale “Torquato Tasso” in Rome) at the age of 17.
Ettore Majorana and his heritage seventy years later
Furthermore, the average age of the existing nuclear power plants, the limitations of primary and secondary uranium resources as well as the problems related to nuclear proliferation and nuclear waste all lead to doubts about the prospects of the standard water moderated nuclear fission reactors.
The Future of Nuclear Energy: Facts and Fiction Chapter IV: Energy from Breeder Reactors and from Fusion?
These ages range between 33 and 135 Myr, so if the late-type secondaries are physically bound to the early-type primaries, they could be Post-T Tauri stars (PTTS).
X-ray emission from Lindroos binary systems
Although we have no reliable measurements of their ages, most of the Lindroos secondaries seem to be younger than 125 Myr (when compared to the Pleiades) with three of them showing ages lower than 35 Myr (IC 2602 cluster).
X-ray emission from Lindroos binary systems
The smallest possible secondary mass is 0.8M⊙ and therefore the maximum explosion time is the age of the universe.
On the typical timescale for the chemical enrichment from SNeIa in Galaxies
Both the CLOSE DDs and the SD Sub –Chandra model yield an age distribution of the events very skewed at the early epochs; the SD –Chandra model exhibits a dramatic drop at late epochs, related to the requirement of building up to the Chandrasekhar mass by accreting the envelope of low mass secondaries.
The rates of Type Ia Supernovae. I. Analytical Formulations
The two secondaries have different orbital periods, different compact components and different lifetimes etc., and appear in different age of the cluster, as shown in Table 5.
Mass transfer from a giant star to a main sequence companion and its contribution to long-orbital-period blue stragglers
For example, RLOF should start before or at the cluster age tcluster to ensure that the secondary may accrete some matter, but it cannot stop much earlier than tcluster , or the secondary has likely left the main sequence.
Mass transfer from a giant star to a main sequence companion and its contribution to long-orbital-period blue stragglers