Dr. Adam G. Riess is a Professor of Astronomy and Physics at the Johns Hopkins University and a Senior member of the Science Staff at the Space Telescope Science Institute, both in Baltimore, MD.
Observations of physical cosmology, primarily through the use of distance indicators like supernovae. Measurements of dark energy and the expansion history of the Universe using optical and near-infrared instruments from space and the ground.
He was a founding member of the High-z Supernova Search Team and led the study in 1998 (first author of the publication) which, along with Supernova Cosmology Project, found evidence of the universe\\\'s present accelerating expansion.
His research involves measurements of the cosmological framework with supernovae (exploding stars) and Cepheids (pulsating stars).
In 1998 Dr. Riess led a study for the High-z Team which provided the first direct and published evidence that the expansion of the Universe was accelerating and filled with Dark Energy (Riess et al. 1998, AJ, 116, 1009), a result which, together with the Supernova Cosmology Project\\\'s result, was called the Breakthrough Discovery of the Year by Science Magazine in 1998.
On the ten year anniversary of this discovery, Symmetry Magazine reprinted the key page from his lab notebook showing the first indication, here, that the expansion of the Universe was accelerating.
He followed this work with a number of studies to test the susceptibility of this measurement to contamination by unexpected types of dust or evolution. To this aim, Dr. Riess led the Hubble Higher-z Team beginning in 2002 to find 25 of the most distant supernovae known with the Hubble Space Telescope, all at redshift greater than 1. This work culminated in the first highly significant detection of the preceding, decelerating epoch of the Universe and helped to confirm the reality of acceleration by disfavoring alternative, astrophysically-motivated explanations for the faintness of supernovae (Riess et al. 2004, ApJ, 607, 655).
This work also began characterizing the time-dependent nature of dark energy. It has been identified by NASA as the #1 Achievement of the Hubble Space Telescope to date.
Riess received the Astronomical Society of the Pacific\\\'s Trumpler Award in 1999, Harvard University\\\'s Bok Prize in 2001, the American Astronomical Society\\\'s Helen B. Warner Prize in 2003, the Raymond and Beverly Sackler Prize in 2004, and in 2006, he shared the Shaw Prize in Astronomy.
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Authors: Riess, Adam G.; Filippenko, Alexei V.; Challis, Peter; Clocchiatti, Alejandro; Diercks, Alan; Garnavich, Peter M.; Gilliland, Ron L.; Hogan, Craig J.; Jha, Saurabh; Kirshner, Robert P.; Leibundgut, B.; Phillips, M. M.; Reiss, David; Schmidt, Brian P.; Schommer, Robert A.; Smith, R. Chris; Spyromilio, J.; Stubbs, Christopher; Suntzeff, Nicholas B.; Tonry, John
Bibliographic Code: 1998AJ....116.1009R
The Farthest Known Supernova: Support for an Accelerating Universe and a Glimpse of the Epoch of Deceleration
Authors: Riess, Adam G.; Nugent, Peter E.; Gilliland, Ronald L.; Schmidt, Brian P.; Tonry, John; Dickinson, Mark; Thompson, Rodger I.; Budavári, Tamás; Casertano, Stefano; Evans, Aaron S.; Filippenko, Alexei V.; Livio, Mario; Sanders, David B.; Shapley, Alice E.; Spinrad, Hyron; Steidel, Charles C.; Stern, Daniel; Surace, Jason; Veilleux, Sylvain
Bibliographic Code: 2001ApJ...560...49R
Type Ia Supernova Discoveries at z > 1 from the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
Authors: Riess, Adam G.; Strolger, Louis-Gregory; Tonry, John; Casertano, Stefano; Ferguson, Henry C.; Mobasher, Bahram; Challis, Peter; Filippenko, Alexei V.; Jha, Saurabh; Li, Weidong; Chornock, Ryan; Kirshner, Robert P.; Leibundgut, Bruno; Dickinson, Mark; Livio, Mario; Giavalisco, Mauro; Steidel, Charles C.; Benítez, Txitxo; Tsvetanov, Zlatan
Bibliographic Code: 2004ApJ...607..665R
New Hubble Space Telescope Discoveries of Type Ia Supernovae at z >= 1: Narrowing Constraints on the Early Behavior of Dark Energy
Authors: Riess, Adam G.; Strolger, Louis-Gregory; Casertano, Stefano; Ferguson, Henry C.; Mobasher, Bahram; Gold, Ben; Challis, Peter J.; Filippenko, Alexei V.; Jha, Saurabh; Li, Weidong; Tonry, John; Foley, Ryan; Kirshner, Robert P.; Dickinson, Mark; MacDonald, Emily; Eisenstein, Daniel; Livio, Mario; Younger, Josh; Xu, Chun; Dahlén, Tomas; Stern, Daniel
Bibliographic Code: 2007ApJ...659...98R