Biographical Memoirs Volume 82 (2003) / Chapter Skim
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Olin Chaddock Wilson
Olin Chaddock Wilson
Pages 352-371
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From page 353... ...
that the widths of the chromospheric Ca II emission lines in latetype stars provide accurate measures of their luminositiesthe WiTson-Bappu effect. He is known for showing the complex internal motions in planetary nebulae en cl the Orion nebula, the latter shows evidence of shock waves en cl turbulence that is non-Kolmogoroff.
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From page 354... ...
There was not much doubt that Olin wouIcl attend the University of California in Berkeley, partly because his family supported his desire for more education, partly because he hacl heard that Berkeley hacl an excellent astronomy department en c! partly because he conic!
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From page 355... ...
He demonstrated that the reported constancy to six decimal places of the length of the meter was inconsistent with the reported variation in the third decimal place in the speed of light. Donald Menzel came to Lick Observatory in 1926, having been a student of Henry Norris Russell at Princeton.
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From page 356... ...
half-time for the Mt. Wilson Observatory, took courses at Caltech, en cl workocl as a teaching fellow for Anderson.
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From page 357... ...
a staff position at $100 a year less than Struve's offer of $2,500. Olin decided that the difference was less than the increased home heating cost in the winters, en c!
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From page 358... ...
Other astronomers who workocl on the rocket project were Bowen, Robert King (of later laboratory transition values fame) , Horace Babcock, Franklin Roach, Gerald Kron, en cl Nick Mayall.
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Nicole, born on December 24, 1945, eventually married chemist Dave McMilIan, who joined the Purdue University faculty in West Lafayette, Indiana. They have two chilciren.
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From page 360... ...
I last saw the Wilsons in March 1994, where they enjoyed the frequent company of Nickie and Dave and their children. Olin bought a pool table, astronomers used to play pool on cloudy nights, but now most of them watch television.
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From page 361... ...
For instance, the identities en cl strength of certain spectral lines told them, through the use of atomic theory en c! laboratory transition values, the atomic abundances en c!
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From page 362... ...
Thus, the assumption of a smoothly varying density graclient in the outer atmosphere is far from the truth. Olin joined astronomers Aciams, Merrill, Sanford, en cl later Deutsch, Kraft, en cl Preston in the stucly of the interstellar lines that appeared in the spectra of early-type (or clistant)
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From page 363... ...
Further, the recent work relating interstellar line strengths with mean distance for stars conic! be user!
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From page 364... ...
He finished previous work on interstellar lines and Wolf-Rayet stars, but he starter! to explore the internal motions of planetaries with "slitless" spectra.
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From page 365... ...
The velocities inclicatecl internal turbulent velocities averaging 5-7 km. However, the velocities are not characteristic of a Kolmogoroff law but rather of shock waves producing subsonic willies.
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From page 366... ...
This is another example of a serendipitous discovery. He knew from solar research that the H en cl K emission was seen only in active regions en cl thus showocl a strong variation cluring the Il-year solar cycle.
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From page 367... ...
to India without becoming involvecl with the measurements or cliscussion. Olin found that when he plottecl the logarithm of the emission line wiciths against the absolute visual magnitudes, which are also on a logarithmic scale, he obtained a straight line over 15 may.
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From page 368... ...
Olin assisted Ira Bowen in installing the coucle spectrograph at the 200-inch Hale telescope in the early 1950s. He also macle up the observing scheclules for the light time on the Mt.
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From page 369... ...
Unidentified interstellar lines in the yellow and red. Astrophys.
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From page 370... ...
Spectrophotometry of the central stars of four planetary nebulae. Astrophys.
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From page 371... ...
153:221-34. 1970 Widths of Ca II chromospheric emission lines as a measure of stellar luminosity.
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