Lectures from School on "Stellar Winds and Mass Loss" in Oleron,
France,
Oct. 2003
In October 2003, at a school on "Stellar Winds and
Mass Loss" held in Oleron, France, I was invited to give a series of
4 x 1.5 hour lectures on "Stellar Wind Mechanisms and Instabilities". A
brief description of the lectures, with links to PDF files
(which can
be viewed using the free Adobe
Acrobat Reader ) of the lecture slides is as follows:
lec1-sw.pdf
(6.9 MB) "Overview + Solar Wind": A general
overview of wind equations and formalism, with then a summary of the
gas-pressure driven outflow
of the solar wind that results from solar coronal heating
lec2-hswcak.pdf
(5 MB) "CAK Line-DrivenWinds from Hot-Stars": A
simplified review of the basic Castor, Abbott, and Klein (1975; CAK)
theory for line-driven mass loss in hot-stars, but emphasizing the
physically more transparent `Qbar' notation.first introduced by
Ken Gayley (1996, ApJ).
lec3-hswrot.pdf
(8 MB) "Rotation and other Multi-D Effects in
Hot-Star Winds":Extension of line-driven wind theory for hot-stars to
account for the vector nature of the line-force, with particular
application to the case with rapid
rotation. This lecture emphasis the peculiar properties of the vector
line-force, and summarizes many of the points made in the general
colloquium
I give on 'Winds that Sail on Starlight'. It also concludes with a
brief
summary of my ideas for rotational mass ejection to make Be-star disks,
a topic also covered elsewhere in my collouquium on 'The Launching of
Be
Star Disks'.
lec4a-csw.pdf
(1.9 MB) "Wave-Pressure Models of Cool-Star Winds":
Summarizes the little I know about cool-star mass loss, briefly
reviewing attempts to
explain this through Alfven-wave-pressure driven winds, and also
emphasizing
the general `Fine-tuning problem' of obtaining a large mass loss with a
terminal speed that is significantly smaller than the surface escape
speed.
lec4b-sedd.pdf
(0.8 MB) "Continuum-Driven Winds from
Super-Eddington Stars": Summarizes recent ideas about continnum-driven
winds based on instabilities that
could occur when a star approaches and exceeds the Eddingoton limit.
lec4c-ldi.pdf
(5.9 MB) "Line-Deshadowing Instability": Reviews the
basis of the strong, intrinsic instabilites that can lead to extensive
small-scale
structure in line-driven stellar winds.
- I would also like to call attention
to some other general summaries related to the subject of these
lectures:
- For the
Encyclopedia of Astronomy and Astrophysics , I wrote a
general-astronomy-level review article on
Radiatively Driven Stellar Winds from Hot Stars , which can be
accessed as either a
PDF (290Kb),
postscript (404Kb), or
gzipped ps (125Kb) file.
- Several of our research projects on hot-star winds were
featured in a general-level summary article, Winds
that Sail on Starlight , that appeared in the Spring 1997 issue of
the the San Diego Supercomputer Center
(SDSC) magazine, Gather/Scatter
- The spring 1999 Centennial meeting of the American Physical Society included an
invited poster session highlighting Great
Discoveries in Astronomy . For this I prepared a poster featuring
Solar and Stellar Winds . I've also created a
slide-show version of this. Using Microsoft's free
PowerPoint viewer , you can also browse either the
poster source file (~1.3Mb) or the
slide-show source file (~1.3Mb).
- For this APS poster there is now a version with the
text translated into french by Dr. Roland Grappin of
the Observatoire de
Paris-Meudon , in Meudon, Fr