lehner_fall_2011

 

Nicolas Lehner

Research Associate Professor
Astrophysics

B.Sc., Universite Louis Pasteur, France, 1994
M.Sc., ibid., 1995
Ph.D., The Queen’s University of Belfast, N. Ireland, 2000

E-mail: nlehner@nd.edu
Lehner’s Personal Web Page 
Address: NSH 338
Phone: (574) 631-5755
Fax: (574) 631-5952

Research Interests

My main research interests focus on understanding how galaxies form and evolve into the objects we see today. Using multi-wavelength spectroscopy and imaging space-based and ground-based observations, my aim is to determine if the basic principles of galaxy growth models are correct and to empirically characterize the large-scale flows of baryons in and out of galaxies that drive the evolution of galaxies over cosmic time.

Selected Publications

Lehner, N., Howk, J.C., O’Meara, J., Prochaska, J.X., Fumagalli, M.: The cosmic Evolution of the Metallicity Distribution of Ionized Gas Traced by Lyman Limit Systems. The Astrophysical Journal, 833, 283 [34 pp] (2016).

Wotta, C., Lehner, N., Howk, J.C., O’Meara, J., Prochaska, J.X.: Low-Metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z<1. The Astrophysical Journal, 831, 95  [23 pp] (2016).

Fox, A.J., Lehner, N., Lockman, J.F., Wakker, B.P., Hill, A.S., Heitsch, F., Stark, V., Barger, K.A., Sembach, K.R., Rahman, M.: On the Metallicity and Origin of the Smith High-Velocity Cloud. The Astrophysical Journal Letters, 816, 11 [6 pp] (2016).

Lehner, N., Howk, J.C., Wakker, B.P.: Evidence for a Massive, Extended Circumgalactic Medium around the Andromeda Galaxy. The Astrophysical Journal, 804, 79 [21 pp] (2015).

Lehner, N., O’Meara, J., Fox, A., Howk, J.C., Prochaska, J.X., Wolfe, A.M., Burns, V., Armstrong, A.: KODIAQ Survey I: Galactic and Circumgalactic OVI  at 2<z<4 and Its Impact on the Cosmic Baryon and Metal Budgets. The Astrophysical Journal,  788, 119  (2014).

Lehner, N., Howk, J.C., Tripp, T.M., Tumlinson, J., Prochaska, J.X., O’Meara, J., Thom, C., Werk, J.K., Fox, A.J., Ribaudo, J.: The Bimodal Metallicity Distribution of the Circumgalactic Medium at z ≤ 1. The Astrophysical Journal, 770, 138 [32 pp] (2013). 

 

Dr. Lehner CV