40.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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255 papers · 1 filter
Search for the magnetic field of the O7.5 III star xi Persei
H. F. Henrichs, R. S. Schnerr, J. A. de Jong +3
Cyclical wind variability is an ubiquitous but as yet unexplained feature among OB stars. The O7.5 III(n)((f)) star xi Persei is the brightest representative of this class on the N…
Large grains in disks around young stars: ATCA observations of WW Cha, RU Lup, and CS Cha
Dave Lommen, Sarah Maddison, Chris Wright +3
Grains in disks around young stars grow from interstellar submicron sizes to planetesimals over the course of several Myr. Thermal emission of large grains or pebbles can be best o…
Observations of the transiting planet TrES-2 with the AIU Jena telescope in Großschwabhausen
St. Raetz, M. Mugrauer, T. O. B. Schmidt +9
We have started high precision photometric monitoring observations at the AIU Jena observatory in Grossschwabhausen near Jena in fall 2006. We used a 25 cm Cassegrain telescope equ…
The Environments of Active Galactic Nuclei within the zCOSMOS Density Field
J. D. Silverman, K. Kovac, C. Knobel +58
The impact of environment on AGN activity up to z~1 is assessed by utilizing a mass-selected sample of galaxies from the 10k catalog of the zCOSMOS spectroscopic redshift survey. W…
Dynamics of lane formation in driven binary complex plasmas
K. R. Sütterlin, A. Wysocki, A. V. Ivlev +10
The dynamical onset of lane formation is studied in experiments with binary complex plasmas under microgravity conditions. Small microparticles are driven and penetrate into a clou…
Fermi LAT Observations of the Vela Pulsar
A. A. Abdo
The Vela pulsar is the brightest persistent source in the GeV sky and thus is the traditional first target for new gamma-ray observatories. We report here on initial Fermi Large Ar…
Ground-based calibration and characterization of the Fermi Gamma-Ray Burst Monitor Detectors
Elisabetta Bissaldi, Andreas von Kienlin, Giselher G. Lichti +18
One of the scientific objectives of NASA's Fermi Gamma-ray Space Telescope is the study of Gamma-Ray Bursts (GRBs). The Fermi Gamma-Ray Burst Monitor (GBM) was designed to detect a…
Chandra observations of the galaxy group AWM 5: cool core re-heating and thermal conduction suppression
A. Baldi, W. Forman, C. Jones +4
We present an analysis of a 40 ksec Chandra observation of the galaxy group AWM 5. It has a small ( kpc) dense cool core with a temperature of keV and the temperat…
Detection of the second eclipsing high mass X-ray binary in M 33
W. Pietsch, F. Haberl, T. J. Gaetz +7
Chandra data of the X-ray source [PMH2004] 47 were obtained in the ACIS Survey of M 33 (ChASeM33) in 2006. During one of the observations, the source varied from a high state to a…
Surrogates with random Fourier Phases
Christoph Raeth, Roberto A. Monetti
The method of surrogates is widely used in the field of nonlinear data analysis for testing for weak nonlinearities. The two most commonly used algorithms for generating surrogates…
Exploring the X-ray emission properties of the supernova remnant G67.7+1.8 and its central X-ray sources
C. Y. Hui, W. Becker
We have studied the supernova remnant G67.7+1.8 with the Chandra X-ray observatory. The remnant's X-ray morphology correlates well with the double-arc structure seen at radio wavel…
The XMM-Newton view of AGN with intermediate mass black holes
G. Miniutti, G. Ponti, J. E. Greene +3
We have observed with XMM-Newton four radiatively efficient active type 1 galaxies with black hole masses < 10^6 Msun, selected optically from the SDSS. We show here that their sof…
Investigating the potential of the Pan-Planets project using Monte Carlo simulations
J. Koppenhoefer, C. Afonso, R. P. Saglia +1
Using Monte Carlo simulations we analyze the potential of the upcoming transit survey Pan-Planets. The analysis covers the simulation of realistic light curves (including the effec…
Hard X-ray Properties of the Merging Cluster Abell 3667 as Observed with Suzaku
Kazuhiro Nakazawa, Craig L. Sarazin, Madoka Kawaharada +10
Wide-band Suzaku data on the merging cluster Abell 3667 were examined for hard X-ray emission in excess to the known thermal component. Suzaku detected X-ray signals in the wide en…
OGLE2-TR-L9: An extrasolar planet transiting a fast-rotating F3 star
I. A. G. Snellen, J. Koppenhoefer, R. F. J. van der Burg +7
Context: Photometric observations for the OGLE-II microlens monitoring campaign have been taken in the period 1997-2000. All light curves of this campaign have recently been made p…
The spatial clustering of X-ray selected AGN in the XMM-COSMOS field
R. Gilli, G. Zamorani, T. Miyaji +70
We study the spatial clustering of 538 X-ray selected AGN in the 2 deg^2 XMM-COSMOS field that are spectroscopically identified to I_{AB}<23 and span the redshift range z=0.2-3.0.…
The very short supersoft X-ray state of the classical nova M31N 2007-11a
M. Henze, W. Pietsch, G. Sala +9
Short supersoft X-ray source (SSS) states (durations < 100 days) of classical novae (CNe) indicate massive white dwarfs that are candidate progenitors of supernovae type Ia. We car…
Mass Ejection by Strange Star Mergers and Observational Implications
A. Bauswein, H. -Th. Janka, R. Oechslin +5
We determine the Galactic production rate of strangelets as a canonical input to calculations of the measurable cosmic ray flux of strangelets by performing simulations of strange…
The halo merger rate in the Millennium Simulation and implications for observed galaxy merger fractions
S. Genel, R. Genzel, N. Bouché +2
We developed a new method to extract halo merger rates from the Millennium Simulation. First, by removing superfluous mergers that are artifacts of the FOF halo finder, we find a l…
Modeling The Star Forming Universe at z=2: Impact of Cold Accretion Flows
S. Khochfar, J. Silk
We present results of a semi-analytic model (SAM) that includes cold accretion and a porosity-based prescription for star formation. We can recover the puzzling observational resul…
The Seventh Data Release of the Sloan Digital Sky Survey
K. Abazajian
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDS…
Morphological Composition of z~0.4 groups: The site of S0 formation
D. J. Wilman, A. Oemler, J. S. Mulchaey +3
The low redshift Universe (z<~0.5) is not a dull place. Processes leading to the suppression of star formation and morphological transformation are prevalent: this is particularly…
A strong optical flare before the rising afterglow of GRB 080129
J. Greiner, T. Krühler, S. McBreen +11
We report on GROND observations of a 40 sec duration (rest-frame) optical flare from GRB 080129 at redshift 4.349. The rise- and decay time follow a power law with indices +12 and…
The COSMOS AGN Spectroscopic Survey I: XMM Counterparts
Jonathan R. Trump, Chris D. Impey, Martin Elvis +17
We present optical spectroscopy for an X-ray and optical flux-limited sample of 677 XMM-Newton selected targets covering the 2 deg^2 COSMOS field, with a yield of 485 high-confiden…