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Astrophysics/Philip A. Stahl
All Reviews from Users
Column Headings: K = Knowledgeability C = Clarity of Response T = Timeliness P = Politeness
N = Nominated for Expert of the Month
| Date | User | K | C | T | P | N | Comments |
|---|---|---|---|---|---|---|---|
| 2009-11-06 | Droo | 10 | 10 | 10 | 10 | No | Thanks - I knew it was right! |
| 2009-11-05 | Droo | 10 | 10 | 10 | 10 | Yes | Thanks! I think I can solve this now with your info. But if not will get back to you. |
| 2009-11-04 | Alan | 10 | 8 | 10 | 10 | No | Dear Dr Stahl, Many thanks for the rapid response. I've put 8 for clarity because I've learned something from your response. However, I suspect it's difficult to give a short answer to this question which is still comprehensible to the uninitiated. The references are useful - I'll definiutely look them up! Thanks again. Alan Reeves. |
| 2009-11-02 | Sabrina | 10 | 10 | 10 | 10 | Yes | Thank you for your quick response; however, my theory was not included within the given text. It was merely an assembly of questions that proved vital to its relevence. Even still, this finally answers what I have been searching for. My actual theory was that, instead of black holes existing inside of quasars, it is actually a rather large electromagnetic field giving off strong impulses/currents to its surrounding area, therein attracting metallic substances around it ( hence, the stars radiating around such area; the currents would be what is keeping them circling at such high speeds). As stated, I am only 15; my educators aren't familiar with what I was asking. I apologize for not researching better; it could have saved me a bit of embarassment, heh. |
| 2009-06-30 | Ana | 10 | 10 | 10 | 10 | Yes | Thanks :) my high school brain actually comprehended the information you so kindly provided! |
| 2009-05-14 | Mohan | 9 | 10 | 10 | 10 | No | Thanks Philip ! |
| 2009-05-10 | Droo | 10 | 10 | 10 | 10 | Yes | |
| 2009-04-08 | Droo | 10 | 10 | 10 | 10 | No | Very impressive answer! |
| 2009-04-02 | Devang | 10 | 10 | 10 | 10 | Yes | thank you sir |
| 2009-03-31 | Devang | 10 | 10 | 10 | 10 | Yes | I am really grateful for your answer |
| 2009-03-24 | Mike | 10 | 10 | 10 | 10 | Yes | |
| 2009-03-19 | Paul | 10 | 10 | 10 | 10 | No | Oh, OK. Thanks |
| 2009-03-18 | Colm | 10 | 10 | 10 | 10 | Yes | |
| 2009-03-07 | Paul | 10 | 10 | 10 | 10 | No | |
| 2009-03-06 | Jani | 10 | 10 | 10 | 10 | Yes | Thanks! Very thorough! |
| 2009-03-06 | Paul | 10 | 10 | 10 | 10 | Yes | Thanks! |
| 2009-03-04 | sudheer | 10 | 10 | 10 | 10 | No | thak u.....! |
| 2009-02-27 | Jani | 10 | 10 | 10 | 10 | Yes | Thanks! Most useful! |
| 2009-02-15 | Droo | 10 | 10 | 10 | 10 | Yes | Very thorough answer! Thanks! |
| 2009-01-27 | Jani | 10 | 10 | 10 | 10 | Yes | Terrific comprehensive answer! Thanks! |
| 2009-01-22 | Tue | 10 | 10 | 10 | 10 | Yes | Impressively knowledgeable answer! Thanks a million! I'm with Penrose, too, and I already have (but have not yet read) his book! I'll be sure to call on you again the next time I have a question! |
| 2009-01-08 | Droo | 10 | 10 | 10 | 10 | Yes | Thanks! A most useful explanation! |
| 2009-01-02 | Droo | 10 | 10 | 10 | 10 | No | Lots of really good information I can follow-up on and maybe get back to you. Thanks! |
| 2008-12-09 | Paul | 10 | 10 | 10 | 10 | Yes | Philip A. Stahl, Thanks very much for the quick response. Your answers are very helpful to me. Paul |
| 2008-12-09 | Bill | 10 | 10 | 10 | 10 | No | Thanks Philip, you answered my question well. Yes, I just looked in my 1960 edition Resnick and Halliday college physics text and found the discussion on this subject. Can't understand why I didn't remember. Let's see... how many years ago was that? Appreciate you help. Bill |
| 2008-12-06 | Droog | 10 | 10 | 10 | 10 | Yes | |
| 2008-12-03 | rodney | 10 | 10 | 10 | 10 | No | |
| 2008-09-07 | Nathan | 10 | 10 | 10 | 10 | Yes | Thanks very much! Very interesting. |
| 2008-07-04 | Green | 10 | 10 | 10 | 10 | No | |
| 2008-07-02 | Green | 10 | 10 | 10 | 10 | No |
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
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
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