TY  - JOUR
A1  - Archer, A.
A1  - Benbow, W.
A1  - Bird, R.
A1  - Brose, Robert
A1  - Buchovecky, M.
A1  - Buckley, J. H.
A1  - Bugaev, V.
A1  - Connolly, M. P.
A1  - Cui, W.
A1  - Daniel, M. K.
A1  - Feng, Q.
A1  - Finley, J. P.
A1  - Fortson, L.
A1  - Furniss, A.
A1  - Gillanders, G.
A1  - Huetten, M.
A1  - Hanna, D.
A1  - Hervet, O.
A1  - Holder, J.
A1  - Hughes, G.
A1  - Humensky, T. B.
A1  - Johnson, C. A.
A1  - Kaaret, P.
A1  - Kar, P.
A1  - Kelley-Hoskins, N.
A1  - Kertzman, M.
A1  - Kieda, D.
A1  - Krause, M.
A1  - Krennrich, F.
A1  - Kumar, S.
A1  - Lang, M. J.
A1  - Lin, T. T. Y.
A1  - Maier, G.
A1  - McArthur, S.
A1  - Moriarty, P.
A1  - Mukherjee, R.
A1  - Ong, R. A.
A1  - Otte, A. N.
A1  - Petrashyk, A.
A1  - Pohl, M.
A1  - Pueschel, Elisa
A1  - Quinn, J.
A1  - Ragan, K.
A1  - Reynolds, P. T.
A1  - Richards, G. T.
A1  - Roache, E.
A1  - Rulten, C.
A1  - Sadeh, I.
A1  - Santander, M.
A1  - Sembroski, G. H.
A1  - Staszak, D.
A1  - Sushch, I.
A1  - Wakely, S. P.
A1  - Wells, R. M.
A1  - Wilcox, P.
A1  - Wilhelm, Alina
A1  - Williams, D. A.
A1  - Williamson, T. J.
A1  - Zitzer, B.
T1  - Measurement of cosmic-ray electrons at TeV energies by VERITAS
JF  - Physical review : D, Particles, fields, gravitation, and cosmology
N2  - Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via synchrotron radiation and inverse-Compton scattering processes while propagating within the Galaxy, and these losses limit their propagation distance. For electrons with TeV energies, the limit is on the order of a kiloparsec. Within that distance, there are only a few known astrophysical objects capable of accelerating electrons to such high energies. It is also possible that the CREs are the products of the annihilation or decay of heavy dark matter (DM) particles. VERITAS, an array of imaging air Cherenkov telescopes in southern Arizona, is primarily utilized for gamma-ray astronomy but also simultaneously collects CREs during all observations. We describe our methods of identifying CREs in VERITAS data and present an energy spectrum, extending from 300 GeV to 5 TeV, obtained from approximately 300 hours of observations. A single power-law fit is ruled out in VERITAS data. We find that the spectrum of CREs is consistent with a broken power law, with a break energy at 710 +/- 40(stat) +/- 140(syst) GeV.
Y1  - 2018
U6  - https://doi.org/10.1103/PhysRevD.98.062004
SN  - 2470-0010
SN  - 2470-0029
VL  - 98
IS  - 6
PB  - American Physical Society
CY  - College Park
ER  - 
TY  - JOUR
A1  - Clark, Peter U.
A1  - Shakun, Jeremy D.
A1  - Marcott, Shaun A.
A1  - Mix, Alan C.
A1  - Eby, Michael
A1  - Kulp, Scott
A1  - Levermann, Anders
A1  - Milne, Glenn A.
A1  - Pfister, Patrik L.
A1  - Santer, Benjamin D.
A1  - Schrag, Daniel P.
A1  - Solomon, Susan
A1  - Stocker, Thomas F.
A1  - Strauss, Benjamin H.
A1  - Weaver, Andrew J.
A1  - Winkelmann, Ricarda
A1  - Archer, David
A1  - Bard, Edouard
A1  - Goldner, Aaron
A1  - Lambeck, Kurt
A1  - Pierrehumbert, Raymond T.
A1  - Plattner, Gian-Kasper
T1  - Consequences of twenty-first-century policy for multi-millennial climate
and sea-level change
JF  - Nature climate change
N2  - Most of the policy debate surrounding the actions needed to mitigate and adapt to anthropogenic climate change has been framed by observations of the past 150 years as well as climate and sea-level projections for the twenty-first century. The focus on this 250-year window, however, obscures some of the most profound problems associated with climate change. Here, we argue that the twentieth and twenty-first centuries, a period during which the overwhelming majority of human-caused carbon emissions are likely to occur, need to be placed into a long-term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist. This long-term perspective illustrates that policy decisions made in the next few years to decades will have profound impacts on global climate, ecosystems and human societies - not just for this century, but for the next ten millennia and beyond.
Y1  - 2016
U6  - https://doi.org/10.1038/NCLIMATE2923
SN  - 1758-678X
SN  - 1758-6798
VL  - 6
SP  - 360
EP  - 369
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - GEN
A1  - Braun, David R.
A1  - Aldeias, Vera
A1  - Archer, Will
A1  - Arrowsmith, J. Ramon
A1  - Baraki, Niguss
A1  - Campisano, Christopher J.
A1  - Deino, Alan L.
A1  - DiMaggio, Erin N.
A1  - Dupont-Nivet, Guillaume
A1  - Engda, Blade
A1  - Feary, David A.
A1  - Garello, Dominique I.
A1  - Kerfelew, Zenash
A1  - McPherron, Shannon P.
A1  - Patterson, David B.
A1  - Reeves, Jonathan S.
A1  - Thompson, Jessica C.
A1  - Reed, Kaye E.
T1  - Reply to Sahle and Gossa: Technology and geochronology at the earliest known Oldowan site at Ledi-Geraru, Ethiopia
T2  - Proceedings of the National Academy of Sciences of the United States of America
Y1  - 2019
U6  - https://doi.org/10.1073/pnas.1911952116
SN  - 0027-8424
N1  - Letter
VL  - 116
IS  - 41
SP  - 20261
EP  - 20262
PB  - National Acad. of Sciences
CY  - Washington
ER  -