Stellar Evolution, Cataclysmic Eruptions, and

the MysteriousV838 Monocerotis



Dr. Timothy Lawlor

Assistant Professor of Physics

Physics Department

Penn State Brandywine


Tuesday, April 1st, at 4:30 5:30 p.m.

Ruhl Student Center, Community Room



The stars are changing - all of them.  Even our own sun is brighter now than it was at its birth, 5 billion years ago (plus or minus
a few hundred million years).  In the case of our Sun, it will be a few billion more years before we have to worry about it
on Earth.  Every once in a while, we spot a star that completely changes in size, brightness and temperature in just a few
weeks!  In this talk I'll review the life of a star like the Sun, what we can learn from starlight, and finally I will discuss the strange
extreme outburst object V838 Monocerotis (the "V" means variable).  This star grew in size by at least 10 times in weeks.



Assistant Professor of Physics and Astrophysics
B.S., Pennsylvania State University,

B.S.,  East Stroudsburg University of Pennsylvania,

M.S., Wichita State University,

Ph.D. University of Delaware
Research/Scholarly Interests:  Computer modeling the late states of stellar evolution; variable stars; born-again stars, V838 monocerotis and similar variable stars; population III starts (early universe stars), massive binary stars;
Joined campus faculty 2006.

                                                                                                                                   V838 Monocerotis Hubble Space Telescope


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