NGC 2392

     Timothy M. Lawlor, Ph.D.
     University of Delaware, 2002    
     Associate Professor, Physics
     Pennsylvania State University, Brandywine
     Media, PA 19063

           tlawlor@psu.edu   MY CV

 

  

 

TEACHING 
                                                                                                                                                 
Physics 211, 213, 214 (Mechanics, Fluids and Thermodynamics, Waves, Light and Quantum Physics) 
Astronomy 001, 011, 097, 297, 497 (Introduction to Astronomy and Independent Studies)

Any students interested in an undergraduate research project should contact me via email or phone.   


 RESEARCH INTERESTS

- Population III stars - low and high mass
- The Born Again Phenomena (or Very Late Thermal Pulse(VLTP)) and associated objects
- Late stages of stellar evolution
- Helium rich (DB) white dwarfs
- PG1159 type stars
- Wolf-Rayett central stars, RCrB stars
- Hydrogen defficeint planetary nebulae

PROJECTS IN PROGRESS:

“Population III white dwarfs and the oldest observed stars in the universe”

 

"New late thermal pulse models and the rapid evolution of Hen-1357 (the CSPN of SAO 24456)"

 

REFEREED PUBLICATIONS:


 “The effects of convection criteria on the evolution of population III stars and the detectability of their supernovae”,

T.M. Lawlor, T.R. Young, J. Teffs, J. MacDonald, 2015, Monthly Notices of the Royal Astronomical Society, 450(2), 1618-1630

 “Astronomy Exercises for the Artist: Van Gogh the Observer,”

T.M. Lawlor, 2013, Astronomy Education Review, 12, 010202 (2013)

 

 “The extremely  low metallicity star SDSS J102915+172927: a subgiant scenario,”

J. MacDonald, T.M. Lawlor, N. Anilmis, and N.F. Rufo, 2013, Monthly Notices of the Royal  Astronomical Society, (May 11, 2013) 431 (2), 1425-1431

         

“The Early Universe Stars: A Review and Modeling Results for Population III Stars,”

T.M. Lawlor, 2010, Penn State York Smith Symposium, 7, November 2010

 

 “Being careful with Pasco’s friction lab: Uncovering pre-sliding displacement?”

T.M. Lawlor, 2008The Physics Teacher, 46, 432-435


Single and binary evolution of Population III stars and their supernova explosions
T.M. Lawlor, T.R. Young, T.A. Johnson & J. MacDonald, 2008, MNRAS, 371, 263 

Helium Layer Masses and a Criterion for The Born Again Phenomena
T.M. Lawlor & J. MacDonald, 2006, MNRAS, 371, 263

A new model for V838 Mon: a born-again object with an epoch of accretion
T.M. Lawlor 2005, MNRAS, 361, 695                       

Sakurai's Object, FG Sge, and V605 Aql: An Evolutionary Sequence Revealed          
T.M. Lawlor
& J. MacDonald, 2003, ApJ, 583, 913

 

Conference Proceedings and Presentations:

T.M. Lawlor, S. Shah, & J. Dorley, 2015, “Population III white dwarfs and the oldest observed stars in the universe,” IAU General Assembly, Meeting #29, #2250216

 

T.M. Lawlor, S. Sebzda, Z. Peterson, & D. Conran, 2015,Evolution models from the AGB to the PNe and the rapid evolution of SAO 24456,” IAU General Assembly, Meeting #29, #2250204

 

T.M. Lawlor, J. MacDonald, T. Young, & J. Teffs, 2015,  “On the importance of convection criterion in population III stellar evolution models,” IAU General Assembly, Meeting #29, #2250177

 

T.M. Lawlor, T.R. Young, J. Teffs, Z. Peterson, J. MacDonald, 2014, “Population III Stars: Evolution and Explosions,” Bulletin of the American Astronomical Society, Washington D.C., Meeting #223, #152.18

 

T.M. Lawlor, T.R. Young, J. Teffs, Z. Peterson, J. MacDonald, 2013, “Evolution and Explosions of 15-60 MS Population III Stars,” First Annual GMT Community Science Meeting: Cosmology in the Era of Extremely Large Telescopes,” The University of Chicago, Chicago, IL. (June 10-13, 2013) 

T.M. Lawlor, T. R. Young, J. MacDonald, T.A. Johnson, 2010, “Mid Mass Population III Stars (the “First” Stars)”, The First Galaxies, Quasars & Gamma-Ray Bursts, State College, PA. (June 6, 2010)               

T.M. Lawlor, T. R. Young, J. MacDonald, T.A. Johnson, 2009, "Evolution of  Mid-Mass Population III Stars," Bulletin of the American Astronomical Society. 42, p336   

      

T.M. Lawlor, J. MacDonald, T.R. Young & T. Johnson, 2008, “Mid-mass Population III Stars: Evolution, Structure, Composition and Mass Loss,” Bulletin of the American Astronomical Society, 41, p.204  

 

T.M. Lawlor, J. MacDonald, and T.R. Young, 2007, “10M Population III single and binary evolution models,” FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 238-240 (2008).

 

T.R. Young, T. Johnson, T.M. Lawlor, and J. MacDonald 2007, “Population III Supernova Light Curves from Massive Stars in Binaries,” FIRST STARS III: First Stars II Conference. AIP Conference Proceedings, Volume 990, pp. 233-237 (2008).

 

T.M. Lawlor 2007, “The Reflection Effect In Born-Again Objects,” 210th Meeting of the American Astronomical Society, Bulletin of the American Astronomical Society, 39, p159

 

T.R. Young, T. Johnson, and T.M. Lawlor, 2007, “Population III Supernova Light Curves,” 210th Meeting of the American Astronomical Society, Bulletin of the American Astronomical Society, 39, 123.13

 

Evolution models for V838 Mon: born-again binaries and others, (contributed talk)
T.M. Lawlor, May 2006, The Nature of V838 Mon and its Light Echo ASP Conference Series,

Vol. 363, Proceedings of the conference held 16-19 May, 2006 in Los Concajos, La Palma, Spain. Edited by Romano, L. M. Corradi and Ulisse Munari. San Francisco: Astronomical Society of the Pacific, 2007., p.249-255

 

Massive pop III stars and their resulting SN light curves,
T.M. Lawlor, T.R. Young, T. Johnson and J. MacDonald, May 2006
STScI May Symposium - Massive Stars, Baltimore, MD

The Effects of Mass Transfer on Massive AGB stars                                                       
T.M. Lawlor, J. MacDonald & T.R. Young, June 2005 BAAS, 37, 500

V838 Mon: Not a Born Again Object?
T.M. Lawlor & J. MacDonald, 2004, BAAS, January meeting in Atlanta

Sakurai's Object, FG Sge, and V605 Aql, T.M. Lawlor & J. MacDonald, 2002, IAU Colloq. 187, Exotic stars as challenges to evolution, ed. C.A. Tout and W. Van Hamme, p.193-198

The Born Again Phenomena and its Link to H-deficient Post-AGB Objects T.M. Lawlor & J. MacDonald, 2000, in 12th European Workshop on White Dwarfs, eds. J.L. Provencal, H.L. Shipman, J. MacDonald, and S. Goodchild, (Lecture Notes in Physics,  Springer-Verlag), p.20-26

Theoretical-Observational comparisons and details in the evolution of Sakurai’s Object, T.M. Lawlor & J. MacDonald, 2000, Astrophysics and Space Science, 279, Special Issue:  Sakurai’s Object: What have we learned   in the first five years? ed. J. Dyson, S.A. Lamb, A. Evans, and B. Smalley, p.123-129
 
Exploratory Evolutionary Models Including Mass Loss, T.M. Lawlor & J. MacDonald, BAAS 31, No. 5, January 1999

Hot Sub-dwarfs: Infrared Fluxes, Binaries and Oscillations
A. Ulla,..., T. Lawlor et al., 1998 In 11th European Conference on White Dwarfs, Lecture Notes in Physics, Springer-Verlag. p.58-64

 M Stars Model Atmospheres: Spectra and Colors
 F. Allard, T. Lawlor, D. R. Alexander, 1995 BAAS, 27, 1432
 
  RESEARCH LINKS:

American Astronomical Society (ApJ, AJ, ApJS)
Inernational Astronomy meetings list
IAU, Inernational Astronomical Union http://www.iau.org
Info exchange for Sakurai's Object:  http://www.astro.keele.ac.uk/sakurai/
White dwarf research: http://whitedwarf.org/research/
The 187th IAU conference: http://www.fiu.edu/~vanhamme/iau187
The 12 European conference on white dwarfs: http://www.udel.edu/physics/wd

 

Other Astronomy Activities:

In June 2004 I traveled to New Delhi, India to image the transit of Venus.  To find out more about this astronomical event and our trip to New Delhi and Agra click the links below

 

 

 

 

 

 

 

 

 

 

http://www.und.edu/instruct/young/toast/VENUS-TRANSIT/

http://newdelhi.usembassy.gov/060804.html       

 

find out more? tlawlor@psu.edu
 
 
 


The Pennsylvania State University is not responsible for and does not review the content of personal web pages. - webmaster@psu.edu 

 

 

Last modified:  Tuesday, 13-Oct-2015 16:07:59 EDT10/2015