In addition to "official"
a significant fraction of a scientist's effort is often
devoted to less formal presentations of their work.
For example, I have found that it is useful to have comprehensive,
textbook-like notes on topics that may be well-developed,
but do not yet occupy textbooks in quite a useful enough form.
The papers and presentations listed here
are divided into the following categories:
Where available, there are also links to full online versions of
articles, notes, and presentations.
notes are Copyright Steven R. Cranmer, 1996-2013. I may publish
them somewhere, someday, in some form or another, but for now, the
author [me] grants the right to copy and distribute these files,
provided they remain unmodified, original authorship is retained, and
they not be used in any widely-distributed or commercial publication.
If the reader would like to cite anything presented
in these documents, please contact me, because most probably there
are better (original) sources to cite....
The Coronal Physics Investigator (CPI) Experiment for ISS:
A New Vision for Understanding Solar Wind Acceleration:
A white paper describing a proposed NASA mission of opportunity
for the International Space Station (ISS).
[Available as an arXiv preprint:
Ultraviolet Coronagraph Spectroscopy: A Key Capability for
Understanding the Physics of Solar Wind Acceleration:
This is a white paper submitted in November 2010 to the NRC's
Solar/Space Physics Decadal Survey project, by myself and 23 coauthors.
In it, we describe how UV coronagraph spectroscopy enables measurements
of the collisionless processes responsible for producing the solar wind.
Although UVCS/SOHO made several key discoveries, many questions remain
unanswered because its capabilities were limited. This paper
summarizes these past achievements and also describes what can be
accomplished with next-generation instrumentation of this kind.
[Available locally in
and also as an arXiv preprint:
On Competing Models of Coronal Heating and Solar Wind
Acceleration: The Debate in '08:
In preparation for lively debate at the May 2008 SPD/AGU Meeting
in Fort Lauderdale, this document was written to briefly lay out my
own view of the evolving controversy over how the solar wind is
accelerated. It is still unknown to what extent the solar wind is fed
by flux tubes that remain open (and are energized by footpoint-driven
wavelike fluctuations), and to what extent much of the mass and
energy is input more intermittently from closed loops into the
[Available as an arXiv preprint:
. . .
Subtitle inspired by Ali and Frazier
Monte Carlo solutions to diffusion-like equations:
A practical application of the Ito Calculus:
Unoriginal notes that describe exact rules for updating the
positions of particles in a Monte Carlo model when the particles
obey a range of diffusion-type partial differential equations.
Nothing really new; it was just helpful for me to lay it all out
in detail for the full range of useful cases.
PDF (68 Kbytes) format]
Potential Hot/Massive Star Areas of Interest for
A brief summary of some major issues concerning hot and massive
stars that could be addressed with Stellar Imager,
a NASA Vision Mission that would use ultra-high angular resolution
at ultraviolet wavelengths to image the surfaces of stars and probe
their interiors with asteroseismology.
(See also related
Astro2010 white paper.)
gzipped postscript (385 Kbytes)
and PDF (141 Kbytes) formats]
Solar Wind Physics with Solar Probe:
An outline (from 1999) of how in situ data from the proposed
Solar Probe mission could be helpful in answering basic
questions about coronal heating and the acceleration of the
high-speed solar wind. 20 specific issues are discussed relating
to particle velocity distribution and field fluctuation measurements.
gzipped postscript (96 Kbytes)
PDF (181 Kbytes) formats]
my inputs from 2005 to the Solar Probe Science Definition team.
UVCS/SOHO Observations of Jupiter in January 1997:
An Independent Calibration of the White Light Channel:
An analysis of data taken to provide an absolute photometric
calibration of one of the channels on the UVCS instrument.
[Revised version: June 2001]
gzipped postscript (239 Kbytes)
and PDF (430 Kbytes) formats]
A Simple Approach to Mutual Irradiation Heating in Close
A brief note that derives an approximate analytic expression for the
rise in temperature expected in the outer layers of stars in close
binary systems that are "irradiated" by incoming radiation from
PDF format (29 Kbytes)]
CUES: An Introduction to Coronal Velocity Distributions
and the Modeling of UVCS/SOHO Emission Lines:
An undergraduate-level documentation for the CUES empirical
modeling code that is distributed on the
Tutorial Web Page. May be useful as a stand-alone introduction.
gzipped postscript (123 Kbytes)
and PDF (251 Kbytes) formats]
On the Synthesis of Solar
Coronal UV Emission Diagnostics:
Describes radiative transfer in optically-thin ultraviolet
spectral lines, resonant scattering redistribution, and "Doppler dimming"
(written in 1997; probably should be updated).
[Available in postscript and
PDF (187 Kbytes) formats]
On the Synthesis of Coronal
White-Light Polarization Diagnostics:
Describes polarized radiative transfer of Thomson-scattered
continuum light and the derivation of various electron density
[Available in postscript
and PDF (138 Kbytes) formats]
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