Results 41 to 50 of about 509,485 (382)

Investigating the cores of fossil systems with Chandra

, 2015
We investigate the cores of fossil galaxy groups and clusters (`fossil systems') using archival Chandra data for a sample of 17 fossil systems. We determined the cool-core fraction for fossils via three observable diagnostics, the central cooling time ...
Bharadwaj, V., Reiprich, T. H., Sanders, J. S., Schellenberger, G.   +3 more
core   +1 more source

Clustering Fossils from the Early Universe [PDF]

, 2012
Many inflationary theories introduce new scalar, vector, or tensor degrees of freedom that may then affect the generation of primordial density perturbations.
Jeong, Donghui, Kamionkowski, Marc
core   +2 more sources

Role of forensic odontologist in post mortem person identification

Dental Research Journal, 2012
The natural teeth are the most durable organs in the bodies of vertebrates, and humankind′s understanding of their own past and evolution relies heavily upon remnant dental evidence found as fossils.
Jahagirdar B Pramod, Anand Marya, Vidhii Sharma   +2 more
doaj   +1 more source

Where are the Fossils of the First Galaxies? II. True Fossils, Ghost Halos, and the Missing Bright Satellites

, 2011
We use a new set of cold dark matter simulations of the local universe to investigate the distribution of fossils of primordial dwarf galaxies within, and around the Milky Way.
Abazajian, Barkana, Belokurov, Belokurov, Bovill, Bovill, Bozek, Brown, Brown, Brown, Bullock, Bullock, Ciardi, de Jong, Efstathiou, Frebel, Geha, Haiman, Irwin, Karachentsev, Karachentsev, Klypin, Knollmann, Koposov, Machacek, Maio, Martinez, Massimo Ricotti, McGaugh, McGaugh, Mia S. Bovill, Monelli, Moore, Naab, Norris, O’Shea, Peebles, Ricotti, Ricotti, Ricotti, Ricotti, Ricotti, Ricotti, Sand, Simon, Simon, Smith, Tinker, Tollerud, Trenti, Tully, Venkatesan, Walker, Walker, Walsh, Walsh, Whalen, Willman, Willman, Willman, Wise, Wise, Zentner, Zucker, Zucker   +64 more
core   +1 more source

Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns [PDF]

, 2016
publisher: Elsevier articletitle: Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns journaltitle: Perspectives in Plant Ecology, Evolution and Systematics articlelink: http://dx.doi.org/10.1016/j.ppees.2016.01.003 ...
Alexander R. Schmidt, Barden, Bell, Benton, Benton, Cardinal, Caspary, Christenhusz, Coiffard, Collinson, Collinson, Cruickshank, Darriba, Drummond, Feldberg, Goeppert, Grimaldi, Guindon, Gómez, Harald Schneider, Hasebe, Hedenäs, Heinrichs, Heinrichs, Heinrichs, Heinrichs, Hu, Jochen Heinrichs, Kramer, Kvaček, Lehtonen, Lehtonen, Lloyd, Lovis, Lóriga, Maddison, Magallón, Magallón, Mays, Mendes, Meredith, Mohr, Nagalingum, Nagalingum, Parham, Poinar, Poinar, Pérez-de la Fuente, Rambaut, Rambaut, Ren, Rothwell, Schmidt, Schmidt, Schneider, Schneider, Schneider, Schneider, Schneider, Schuettpelz, Schuettpelz, Shi, Skog, Smith, Smith, Smith, Smith, Smith, Tidwell, Tryon, van Konijnenburg-van Cittert, Vera, Vermeij, Villarreal, Wing, Zeng   +75 more
core   +1 more source

Fossils upon Fossils [PDF]

Nature, 1967
Vertebrate Paleontology By Alfred Sherwood Romer. Third edition. Pp. viii + 468. (Chicago and London: University of Chicago Press, 1966.) $10; 72s.
openaire   +1 more source

The Mass Assembly of Fossil Groups of Galaxies in the Millennium Simulation

, 2007
The evolution of present-day fossil galaxy groups is studied in the Millennium Simulation. Using the corresponding Millennium gas simulation and semi-analytic galaxy catalogues, we select fossil groups at redshift zero according to the conventional ...
Dariush, Ali, Hartley, Will, Khosroshahi, Habib G., Pearce, Frazer, Ponman, Trevor J., Raychaudhury, Somak   +5 more
core   +1 more source

Fossil group origins - VI. Global X-ray scaling relations of fossil galaxy clusters [PDF]

, 2015
We present the first pointed X-ray observations of 10 candidate fossil galaxy groups and clusters. With these Suzaku observations, we determine global temperatures and bolometric X-ray luminosities of the intracluster medium (ICM) out to $r_{500}$ for ...
Aguerri, J. A. L., Barrena, R., Corsini, E. M., D'Onghia, E., De Grandi, S., Gastaldello, F., Girardi, M., Jiménez-Bailón, E., Kundert, A., Lozada-Muñoz, M., Méndez-Abreu, J., Sánchez-Janssen, R., Wilcots, E., Zarattini, S.   +13 more
core   +3 more sources

How Technology Has Thrown Us Out of Balance with Nature and Why We Need to Get Back In

Molecular Frontiers Journal, 2020
We have created a technology-based environment in an effort to control our world, but we need to understand that the biological forces that shaped us continue to play a role in our future. As more and more species go extinct because of human activity, we
Donald Johanson
doaj   +1 more source

Fossil–Lagerstätten [PDF]

Geology Today, 2008
Possibly every palaeontologist, before and after Charles Darwin, has been well aware that the fossil record is very incomplete. Only a tiny percentage of the plants and animals alive at any one time in the past get preserved as fossils, both in terms of numbers of individuals and in terms of numbers of species.
Nudds, J.R., Selden, P.A.
openaire   +2 more sources