Andrew C. Layden

Professor

Chair, Department of Physics & Astronomy
Bowling Green State University
Bowling Green, OH 43403

Office: 104C Overman
voice: 419-372-8653
FAX: 419-372-9938
email: laydena@bgsu.edu

Credentials:

• B.A. - Wesleyan University
  
• Ph.D. - Yale University  

Specialty:

• Astrophysics
  • Photometry of variable stars in old stellar populations: RR Lyrae, Long-period variables, Cepheids
  • Spectroscopy of RR Lyrae variables: chemical abundances and kinematics
    
  • Determination of basic properties of RR Lyrae variables: absolute magnitudes and intrinsic colors

Selected Publications:

Layden, A.C., Evangelista, J., Gupta, S., Mittameda, M., Mulloy, E., Muslim, S., Olushola-Alao, T., & Rishi, A. 2025, AN, 346, e20240135, "Revisiting Variable Stars Near Globular Clusters South of -29 deg Declination"

Caddy, R.V., Layden, A.C., et al. 2022, PASP, 134, 094201, "Optical Time-Series Photometry of the Symbiotic Nova V1835 Aquilae"

Zinn, R., Chen, X., Layden, A.C., & Casseti-Dinescu, D.I. 2020, MNRAS, 492, 2161, "Local RR Lyrae stars: native and alien"

Layden, A., Tiede, G.P., Chaboyer, B., Bunner, C., & Smitka, M., 2019, Astronomical Journal, 158, 105, "Infrared K_S-band Photometry of Field RR Lyrae Variable Stars"

Osborn, W., Kopacki, G., Smith, H., Layden, A., Pritzl, B., Keuhn, C., & Anderson, M., 2019, Acta Astronomica, 69, 101, "Variable Stars in M13. III. The Cepheid Variables and their Relation to Evolutionary Changes in Metal-poor BL Her Stars"

Osborn, W., Layden, A., Kopacki, G., Smith, H., Anderson, M., Kelley, A., McBride, K., & Pritzl, B., 2017, Acta Astronomica, 67, 131-158, "Variable Stars in M13. II. The Red Variables and the Globular Cluster Period-Luminosity Relation"

Abbas, M., Layden, A., Guldenschuh, K., Reichart, D. Ivarsen, K. Haislip, J., Nysewander, M., LaCluyze, A. & Welch, D. 2015, AJ, 149, 40-49, "Variable Stars in Metal-Rich Globular Clusters. IV. Long Period Variables in NGC 6496"

Go here to visit a complete listing of my papers and supplemental data.

Over the years, we have had a number of students who excelled in amateur astrophotography. Here, I have assembled some nice examples of their work.

Here is a larger website including other things I maintain including Astronomy simulations, student projects, public talks, etc.