Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2.2k papers
- University of OxfordGB2.1k papers
- Johannes Gutenberg University MainzDE2.1k papers
- University of ManchesterGB2.1k papers
- Stockholm UniversitySE2k papers
- University of Science and Technology of ChinaCN1.9k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT1.8k papers
- Joint Institute for Nuclear ResearchRU1.7k papers
- University of BonnDE1.7k papers
- Indiana University BloomingtonUS1.7k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.6k papers
- Aix-Marseille UniversitéFR1.6k papers
30 papers · 2 filters
The MiMeS Project: First Results
J. H. Grunhut, E. Alecian, D. A. Bohlender +11
Massive stars are those stars with initial masses above about 8 times that of the sun, eventually leading to catastrophic explosions in the form of supernovae. These represent the…
Discovery of very low amplitude 9-minute multiperiodic pulsations in the magnetic Ap star HD 75445
O. Kochukhov, S. Bagnulo, G. Lo Curto +1
We present our discovery of pulsational radial-velocity variations in the cool Ap star HD 75445, an object spectroscopically similar to the bright, rapidly-oscillating Ap (roAp) st…
Standing on the shoulders of giants: Trojan Earths and vortex trapping in low mass self-gravitating protoplanetary disks of gas and solids
W. Lyra, A. Johansen, H. Klahr +1
Centimeter and meter sized solid particles in protoplanetary disks are trapped within long lived high pressure regions, creating opportunities for collapse into planetesimals and p…
MOST discovers a multimode delta Scuti star in a triple system: HD 61199
M. Hareter, O. Kochukhov, H. Lehmann +13
A field star, HD 61199 (V ~ 8), simultaneously observed with Procyon by the MOST (Microvariability & Oscillations of STars) satellite in continuous runs of 34, 17, and 34 days in 2…
Solar Energetic Particle Spectrum on 13 December 2006 Determined by IceTop
R. Abbasi
On 13 December 2006 the IceTop air shower array at the South Pole detected a major solar particle event. By numerically simulating the response of the IceTop tanks, which are thick…
Prospects for CDM sub-halo detection using high angular resolution observations
T. Riehm, E. Zackrisson, O. Moeller +2
In the CDM scenario, dark matter halos are assembled hierarchically from smaller subunits. A long-standing problem with this picture is that the number of sub-halos predicted by CD…
Are the red halos of galaxies made of low-mass stars? Constraints from subdwarf star counts in the Milky Way halo
E. Zackrisson, C. Flynn
Surface photometry detections of red and exceedingly faint halos around galaxies have resurrected the old question of whether some non-negligible fraction of the missing baryons of…
Magnetic fields and chemical peculiarities of the very young intermediate-mass binary system HD 72106
C. P. Folsom, G. A. Wade, O. Kochukhov +9
The recently discovered magnetic Herbig Ae and Be stars may provide qualitatively new information about the formation and evolution of magnetic Ap and Bp stars. We have performed a…
Natural Transfer of Viable Microbes in Space from Planets in the Extra-Solar Systems to a Planet in our Solar System and Vice-Versa
Mauri Valtonen, Pasi Nurmi, Jia-Qing Zheng +7
We investigate whether it is possible that viable microbes could have been transported to Earth from the planets in extra-solar systems by means of natural vehicles such as ejecta…
Search for Point Sources of High Energy Neutrinos with Final Data from AMANDA-II
The IceCube Collaboration
We present a search for point sources of high energy neutrinos using 3.8 years of data recorded by AMANDA-II during 2000-2006. After reconstructing muon tracks and applying selecti…
The stellar content of the Hamburg/ESO survey. V. The metallicity distribution function of the Galactic halo
T. Schoerck, N. Christlieb, J. G. Cohen +22
We determine the metallicity distribution function (MDF) of the Galactic halo by means of a sample of 1638 metal-poor stars selected from the Hamburg/ESO objective-prism survey (HE…
Atomic diffusion and mixing in old stars II. Observations of stars in the globular cluster NGC 6397 with VLT/FLAMES-GIRAFFE
K. Lind, A. J. Korn, P. S. Barklem +1
Evolutionary trends in the surface abundances of heavier elements have recently been identified in the globular cluster NGC 6397 ([Fe/H]=-2), indicating the operation of atomic dif…
Embryos grown in the dead zone: Assembling the first protoplanetary cores in low mass self-gravitating circumstellar disks of gas and solids
W. Lyra, A. Johansen, H. Klahr +1
In the borders of the dead zones of protoplanetary disks, the inflow of gas produces a local density maximum that triggers the Rossby wave instability. The vortices that form are e…
The radii of the nearby K5V and K7V stars 61 Cyg A & B - CHARA/FLUOR interferometry and CESAM2k modeling
Pierre Kervella, Antoine Mérand, Bernard Pichon +11
Context: The main sequence binary star 61 Cyg (K5V+K7V) is our nearest stellar neighbour in the northern hemisphere. This proximity makes it a particularly well suited system for v…
Comparison of the atmosphere above the South Pole, Dome C and Dome A: first attempt
S. Hagelin, E. Masciadri, F. Lascaux +1
The atmospheric properties above three sites (Dome C, Dome A and the South Pole) on the Internal Antarctic Plateau are investigated for astronomical applications using the monthly…
Pulsations in the atmosphere of the rapidly oscillating Ap star 10 Aquilae
M. Sachkov, O. Kochukhov, T. Ryabchikova +4
The rapidly oscillating Ap (roAp) star 10 Aql shows one of the lowest photometric pulsation amplitudes and is characterized by an unusual spectroscopic pulsational behavior compare…
Strong lensing by subhalos in the dwarf-galaxy mass range I: Image separations
E. Zackrisson, T. Riehm, O. Moeller +2
The cold dark matter scenario predicts that a large number of dark subhalos should be located within the halo of each Milky-way sized galaxy. One tell-tale signature of such dark s…
Model atmospheres of magnetic chemically peculiar stars. A remarkable strong-field Bp SiCrFe star HD137509
Denis Shulyak, Oleg Kochukhov, Sergiy Khan
In the last few years we have developed stellar model atmospheres which included effects of anomalous abundances and strong magnetic field. The full treatment of anomalous Zeeman s…
Mg I emission lines at 12 and 18 micrometer in K giants
J. O. Sundqvist, N. Ryde, G. M. Harper +2
The solar Mg I emission lines at 12 micrometer have already been observed and analyzed well. Previous modeling attempts for other stars have, however, been made only for Procyon an…
The photospheric solar oxygen project: I. Abundance analysis of atomic lines and influence of atmospheric models
Elisabetta Caffau, Hans-G. Ludwig, Matthias Steffen +5
The solar oxygen abundance has undergone a major downward revision in the last decade, the most noticeable one being the update including 3D hydrodynamical simulations to model the…
Dust-driven Winds and Mass Loss of C-rich AGB Stars with subsolar Metallicities
A. Wachter, J. M. Winters, K. -P. Schröder +1
We investigate the mass loss of highly evolved, low- and intermediate mass stars and stellar samples with subsolar metallicity. We give a qualitative as well as quantitative descri…
HE 1327-2326, an unevolved star with [Fe/H]<-5.0. II. New 3D-1D corrected abundances from a VLT/UVES spectrum
Anna Frebel, Kjell Eriksson, Remo Collet +2
We present a new abundance analysis of HE 1327-2326, the currently most iron-poor star, based on observational data obtained with VLT/UVES. We correct the 1D LTE abundances for 3D…
Intense Mass Loss from C-rich AGB Stars at low Metallicity?
L. Mattsson, R. Wahlin, S. Höfner +1
We argue that the energy injection of pulsations may be of greater importance to the mass-loss rate of AGB stars than metallicity, and that the mass-loss trend with metallicity is…
Constraining the mass of the GRB 030329 progenitor
G. Ostlin, E. Zackrisson, J. Sollerman +2
The long-duration gamma-ray burst (GRB) 030329, associated with supernova (SN) 2003dh, occurred inside a star-forming dwarf galaxy at redshift . The low redshift, and a r…