Philip A. Stahl - Astrophysics - Physics - Science

About > AllExperts
	Search for

Main Menu

Login (Experts Only)

About Us · FAQ · Tell Friends About Us · Link To Us · Free Encyclopedia · Disclaimer · Tech Support

You are here: AllExperts > Science > Physics > Astrophysics

Expert Profile: Philip A. Stahl

Expertise: I specialize in stellar and solar astrophysics. Can answer any questions pertaining to these areas, the spectroscopic analysis of stars – as well as the magneto-hydrodynamics of sunspots and solar flares. Sorry – No homework problems done or research projects! I will provide hints on solutions.

Experience in the area
Have published papers on the relationship between sunspot morphology and solar flares; discovery of SID flares related to this, constructed computerized stellar models; MHD research.

Organizations
American Astronomical Society (Solar physics and Dynamical astronomy divisions), American Geophysical Union, American Mathematical Society, Intertel.

Publications
Solar Physics, Journal of the Royal Astronomical Society of Canada, Journal of the Barbados Astronomical Society, Meudon Solar Flare Proceedings (Meudon, France)

Education/Credentials
B.A. degree in Astronomy; M.Phil. degree in Physics - specializing in solar physics.

Awards and Honors
Postgraduate research award- Barbados government; Studentship Award in Solar Physics - American Astronomical Society

Ask a Question	View Past Answers	View Ratings

Average Ratings
Prestige Points: 1400
Knowledge	9.98 Best of the best
Clarity of Response	9.86 Best of the best
Timeliness	9.93 Best of the best
Politeness	10.0 Best of the best
Number Of Questions (in Past 24 Hours)		0
Max Questions to be Asked (in 24 Hour period)		5
Total Questions (since joining AllExperts)		128

Recent Reviews from Users

Knowl	Clarity	Time	Politeness	Date
10	10	10	10	09/07/08
10	10	10	10	07/04/08
10	10	10	10	07/02/08
10	10	10	10	06/04/08
10	10	10	10	04/22/08

User Comments

Thanks very much! Very interesting.
(Nathan on 09/07/08)

Very helpful! Should be able to do this problem easily now!
(Droo on 06/04/08)

Thanks for a terrifically comprehensive answer, more than I expected!
(Jani on 04/22/08)

View All Comments

Ask a Question	View Past Answers	View Ratings

Recent Answers from Philip A. Stahl

2008-11-17 why sky is dark at night ?: Hello, Olber's paradox is generally rendered with vastly more complexity than it needs to be, using assorted expanding "shells" and so forth. To me the answer to why the sky is dark at night boils down...

2008-10-20 Big tube from earth...: Not likely at all! The air molecules of our atmosphere, remember, are held (more or less) in place by the force of gravity. The only thing that would or could dislodge them (to our detriment) would be...

2008-09-17 Gravitational pull: Hello, First things first - I have to ask if this is a homework question. If it is, the most I can do is offer some pointers, as I emphatically do not like doing students' homework for them. If it...

2008-09-06 plasma: Hello, I think you are confusing two different domains of plasma. You are thinking of "hot plasma" such as in the Sun's core, wherein the temperatures can reach 10^7 K and protons, electrons are essentially...

2008-09-05 more info: Actually, that value is: 5.3 x 10^8 m/s^2 Not m/s! Remember this is an acceleration, and actually a centripetal acceleration - so yes, it is feasible. As you will recall (or google!) centripetal...