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most citedQuantum Computation with Quantum Dots

6.9k citations

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342 papers · 1 filter

astro-ph2008★ 71 cited

The Impact of Uncertainties in Reaction Q-values on Nucleosynthesis in Type I X-Ray Bursts

A. Parikh, J. Jose, C. Iliadis +2

Nucleosynthesis in Type I X-ray bursts may involve up to several thousand nuclear processes. The majority of these processes have only been determined theoretically due to the lack…

astro-ph2008★ 72 cited

New period-luminosity and period-color relations of classical Cepheids: III. Cepheids in SMC

A. Sandage, G. A. Tammann, B. Reindl

The photometric data for 460 classical, fundamental-mode Cepheids in the SMC with log P > 0.4 measured by Udalski et al. have been analyzed for their P-C and P-L relations, and for…

astro-ph2008★ 276 cited

Signals of the QCD phase transition in core-collapse supernovae

I. Sagert, M. Hempel, G. Pagliara +5

We explore the implications of the QCD phase transition during the postbounce evolution of core-collapse supernovae. Using the MIT bag model for the description of quark matter and…

astro-ph2008★ 62 cited

Coulomb suppression of the stellar enhancement factor

G. G. Kiss, T. Rauscher, Gy. Gyürky +3

It is commonly assumed that reaction measurements for astrophysics should be preferably performed in the direction of positive Q value to minimize the impact of the stellar enhance…

astro-ph2008★ 2 cited

Angular momentum transport during X-ray bursts on neutron stars: a numerical general relativistic hydrodynamical study

A. Hujeirat, F. -K. Thielemann

The distribution of angular momentum of the matter during X-ray bursts on neutron stars is studied by means of 3D axi-symmetric general relativistic hydrodynamics. The set of fully…

astro-ph2008★ 198 cited

The neutrino signal from protoneutron star accretion and black hole formation

T. Fischer, S. C. Whitehouse, A. Mezzacappa +2

We discuss the formation of stellar mass black holes via protoneutron star (PNS) collapse. In the absence of an earlier explosion, the PNS collapses to a black hole due to the cont…

astro-ph2008★ 52 cited

Cross section measurements of -induced reactions on Mo and Sn for -process studies

W. Rapp, I. Dillmann, F. Käppeler +5

The Mo()Ru, Mo()Ru, and Sn()Te cross sections were measured at the upper end of the -process Gamow window between 8.2…

astro-ph2008★ 7 cited

Stellar Evolution in the Early Universe

R. Hirschi, U. Frischknecht, F. -K. Thielemann +5

Massive stars played a key role in the early evolution of the Universe. They formed with the first halos and started the re-ionisation. It is therefore very important to understand…

astro-ph2008★ 26 cited

Astrophysical relevance of transition energies

T. Rauscher

The relevant gamma energy range is explicitly identified where additional gamma$ strength has to be located for having an impact on astrophysically relevant reactions. It is shown…

astro-ph2008★ 1 cited

SMC in space and time: a project to study the evolution of the prototype interacting late-type dwarf galaxy

M. Tosi, J. Gallagher, E. Sabbi +13

We introduce the SMC in space and time, a large coordinated space and ground-based program to study star formation processes and history, as well as variable stars, structure, kine…

astro-ph2008★ 225 cited

Age Determination of Six Intermediate-age SMC Star Clusters with HST/ACS

Katharina Glatt, Eva K. Grebel, Elena Sabbi +9

We present a photometric analysis of the star clusters Lindsay 1, Kron 3, NGC339, NGC416, Lindsay 38, and NGC419 in the Small Magellanic Cloud (SMC), observed with the Hubble Space…

astro-ph2008★ 58 cited

The expansion field: The value of H_0

G. A. Tammann, A. Sandage, B. Reindl

Any calibration of the present value of the Hubble constant requires recession velocities and distances of galaxies. While the conversion of observed velocities into true recession…

astro-ph2008★ 29 cited

-Process simulations with a modified reaction library

I. Dillmann, T. Rauscher, M. Heil +3

We have performed -process simulations with the most recent stellar cross sections from the "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" project (versi…

astro-ph2008★ 10 cited

(n,) Cross Sections of Light p Nuclei -- Towards an Updated Database for the p Process

I. Dillmann, M. Heil, F. Käppeler +3

The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capt…

astro-ph2008★ 23 cited

Experimental (n,) cross sections of the p-process nuclei Se and Sr

I. Dillmann, M. Heil, F. Käppeler +2

The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capt…

astro-ph2008

Iron-60 evidence for early injection and efficient mixing of stellar debris in the protosolar nebula

N. Dauphas, D. L. Cook, A. Sacarabany +6

Among extinct radioactivities present in meteorites, 60Fe (t1/2 = 1.49 Myr) plays a key role as a high-resolution chronometer, a heat source in planetesimals, and a fingerprint of…

astro-ph2008★ 82 cited

Comparing CN and CH Line Strengths in a Homogeneous Spectroscopic Sample of 8 Galactic Globular Clusters

Andrea Kayser, Michael Hilker, Eva K. Grebel +1

Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in several Galactic globular clusters (GCs). This study is based on a homogeneous dat…

astro-ph2008★ 28 cited

Temperature Differences in the Cepheid Instability Strip Require Differences in the Period-Luminosity Relation in Slope and Zero Point

Allan Sandage, G. A. Tammann

A graphical and an algebraic demonstration is made to show why the slope and zero point of the Cepheid period-luminosity (P-L) relation is rigidly coupled with the slope and zero p…

astro-ph2008★ 5 cited

Crucial inputs to nucleosynthesis calculations

T. Rauscher

The first part of the paper discusses nuclear properties relevant to predict compound reactions. The second part addresses direct reactions with special emphasis on direct neutron…

astro-ph2008★ 165 cited

Complexity on Small Scales III: Iron and alpha Element Abundances in the Carina Dwarf Spheroidal Galaxy

A. Koch, E. K. Grebel, G. F. Gilmore +5

We have obtained high-resolution spectroscopy of ten red giants in the Carina dwarf spheroidal (dSph) with UVES at the ESO/VLT. Here we present the abundances of O,Na,Mg,Si,Ca,Ti a…

astro-ph2008★ 78 cited

Galactic kinematics with RAVE data: I. The distribution of stars towards the Galactic poles

L. Veltz, O. Bienaymé, K. C. Freeman +16

We analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. The c…

astro-ph2007★ 84 cited

Comparison of Distances from RR Lyrae Stars, the Tip of the Red-Giant Branch and Classical Cepheids

G. A. Tammann, A. Sandage, B. Reindl

The extragalactic distance scale relies heavily on Cepheids. However, it has become clear from observations and pulsation models that the slope and zero point of their P-L relation…

astro-ph2007★ 21 cited

Volume limited dependent Galactic model parameters

S. Karaali, S. Bilir, E. Yaz +2

We estimated 34 sets of Galactic model parameters for three intermediate latitude fields with Galactic longitudes l=60, l=90, and l=180, and we discussed their dependence on the vo…

astro-ph2007★ 202 cited

The isotropic diffusion source approximation for supernova neutrino transport

M. Liebendoerfer, S. C. Whitehouse, T. Fischer

Astrophysical observations originate from matter that interacts with radiation or transported particles. We develop a pragmatic approximation in order to enable multi-dimensional s…