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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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219 papers · 1 filter
X-ray and optical properties of new Gamma Cas-like objects discovered in X-ray surveys
Christian Motch, Raimundo Lopes de Oliveira, Ignacio Negueruela +2
A growing number of early Be stars discovered in X-ray surveys exhibit X-ray luminosities intermediate between those of normal stars and those of most Be/X-ray binaries in quiescen…
The long period Intermediate Polar 1RXSJ154814.5-452845
D. de Martino, J. -M. Bonnet-Bidaud, M. Mouchet +3
We present the first time resolved medium resolution optical spectroscopy of the recently identified peculiar Intermediate Polar (IP) 1RXSJ154814.5-452845, which allows us to preci…
Temperature distribution in magnetized neutron star crusts. II. The effect of a strong toroidal component
U. Geppert, M. Kueker, Dany Page
We continue the study of the effects of a strong magnetic field on the temperature distribution in the crust of a magnetized neutron star (NS) and its impact on the observable surf…
MAMBO 1.2 Millimeter observations of BzK-selected star-forming Galaxies at z~2
H. Dannerbauer, E. Daddi, M. Onodera +9
We present MAMBO 1.2 mm observations of five BzK-pre-selected vigorous starburst galaxies at z~2. Two of these were detected at more than 99.5% confidence levels, with 1.2 mm fluxe…
Constraining MgII absorbers with the SDSS
Brice Ménard, Stefano Zibetti, Daniel Nestor +1
Using a large sample of MgII absorbers with 0.4<z<2.2 detected by Nestor et al (2005) in the Early Data Release of the SDSS, we present new constraints on the physical properties o…
INTEGRAL and RXTE Observations of Centaurus A
Richard E. Rothschild, Joern Wilms, John Tomsick +6
INTEGRAL and RXTE performed three simultaneous observations of the nearby radio galaxy Cen A in 2003 March, 2004 January, and 2004 February with the goals of investigating the geom…
The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations
A. Eckart, F. K. Baganoff, R. Schoedel +17
We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3-4x10**6 solar mass black hole at the Galactic Cent…
Rejuvenation of spiral bulges
Daniel Thomas, Roger L. Davies
We seek to understand whether the stellar populations of galactic bulges show fingerprints of secular evolution triggered by the presence of the disc. For this purpose we re-analys…
Investigating a Fluctuating-accretion Model for the Spectral-timing Properties of Accreting Black Hole Systems
P. Arevalo, P. Uttley
The fluctuating accretion model of Lyubarskii (1997) and its extension by Kotov et al. (2001), seeks to explain the spectral-timing properties of the X-ray variability of accreting…
The evolution of the star formation activity in galaxies and its dependence on environment
B. M. Poggianti, A. von der Linden, G. De Lucia +16
We study how the proportion of star-forming galaxies evolves between z=0.8 and z=0 as a function of galaxy environment, using the [OII] line in emission as a signature of ongoing s…
26Al in the inner Galaxy
R. Diehl, H. Halloin, K. Kretschmer +12
We performed a spectroscopic study of the 1809 keV gamma-ray line from 26Al decay in the Galaxy using the SPI imaging spectrometer with its high-resolution Ge detector camera on th…
The XMM-Newton Slew Survey: a wide-angle survey in the 0.2 - 12 keV band
M. J. Freyberg, B. Altieri, D. Bermejo +4
The scientific data collected during slews of the XMM-Newton satellite are used to construct a slew survey catalogue. This comprises of the order of 4000 sources detected in the EP…
A Survey of z>5.7 Quasars in the Sloan Digital Sky Survey IV: Discovery of Seven Additional Quasars
Xiaohui Fan, Michael A. Strauss, Gordon T. Richards +27
We present the discovery of seven quasars at z>5.7, selected from ~2000 deg^2 of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new quasars have redshifts z fr…
Probing for evolutionary links between local ULIRGs and QSOs from NIR spectroscopy
K. M. Dasyra, L. J. Tacconi, R. I. Davies +6
We present a study of the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs), merging galaxies of infrared luminosity >10^12 L_sun. During our Very Large Telescope lar…
Correlated spectral and temporal changes in 3C 390.3: a new link between AGN and Galactic Black Hole Binaries?
M. Gliozzi, I. E. Papadakis, C. Raeth
This work presents the results from a systematic search for evidence of temporal changes (i.e., non-stationarity) associated with spectral variations in 3C 390.3, using data from a…
The soft X-ray properties of quasars in the Sloan Digital Sky Survey
Shiyin Shen, Simon D. M. White, H. J. Mo +4
We use the ROSAT All Sky Survey (RASS) to study the soft X-ray properties of a homogeneous sample of 46,420 quasars selected from the third data release of the Sloan Digital Sky Su…
Chandra Multiwavelength Project: Normal Galaxies at Intermediate Redshift
D. -W. Kim, W. A. Barkhouse, E. R. Colmenero +11
(abridged) We have investigated 136 Chandra extragalactic sources without broad optical emission lines, including 93 galaxies with narrow emission lines (NELG) and 43 with only abs…
The Tully-Fisher relation of intermediate redshift field and cluster galaxies from Subaru spectroscopy
O. Nakamura, A. Aragon-Salamanca, B. Milvang-Jensen +3
We have carried out spectroscopic observations in 4 cluster fields using Subaru's FOCAS multi-slit spectrograph and obtained spectra for 103 bright disk field and cluster galaxies…
Weighing the young stellar discs around Sgr A*
Sergei Nayakshin, Walter Dehnen, Jorge Cuadra +1
It is believed that young massive stars orbiting Sgr A* in two stellar discs on scales of 0.1-0.2 parsecs were formed either farther out in the Galaxy and then quickly migrated inw…
XMM-Newton observations of the microquasars GRO J1655-40 and GRS 1915+105
Gloria Sala, Jochen Greiner, Frank Haberl +4
We present results of a sequence of XMM-Newton observations of the two microquasars GRO J1655-40 and GRS 1915+105. The observations were preformed using the EPIC-pn camera in the B…
Weak lensing mass reconstructions of the ESO Distant Cluster Survey
D. Clowe, P. Schneider, A. Aragon-Salamanca +12
We present weak lensing mass reconstructions for the 20 high-redshift clusters i n the ESO Distant Cluster Survey. The weak lensing analysis was performed on deep, 3-color optical…
Candidate Isolated Neutron Stars and Other Optically Blank X-ray Fields Identified from the ROSAT All-Sky and Sloan Digital Sky Surveys
Marcel A. Agueros, Scott F. Anderson, Bruce Margon +6
Only seven radio-quiet isolated neutron stars (INSs) emitting thermal X rays are known, a sample that has yet to definitively address such fundamental issues as the equation of sta…
An explanation for the soft X-ray excess in AGN (Conference proceedings version)
J Crummy, AC Fabian, L Gallo +1
We present a large sample of type 1 AGN spectra taken with XMM-Newton. We fit them with the relativistically blurred photoionized disc model of Ross & Fabian (2005). This model is…
Extending the X-ray luminosity function of AGN to high redshift
J. Silverman, P. Green, W. Barkhouse +6
X-ray surveys of the extragalactic universe are now able to detect significant numbers of AGN out to high redshift (z~5). We highlight some results from the Chandra Multiwavelength…