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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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394 papers · 1 filter
On the nature of faint Low Surface Brightness galaxies in the Coma cluster
C. Adami, R. Pello, M. P. Ulmer +5
This project is the continuation of our study of faint Low Surface Brightness Galaxies (fLSBs) in one of the densest nearby galaxy regions known, the Coma cluster. Our goal is to i…
A Catalog of 24um Sources Toward the Galactic Center
J. L. Hinz, G. H. Rieke, F. Yusef-Zadeh +3
We present a 1.5deg x 8deg (220pc x 1195pc) Multiband Imaging Photometer for Spitzer 24um image of the Galactic Center and an accompanying point source list. This image is the high…
Further Constraints on Thermal Quiescent X-ray Emission from SAX J1808.4-3658
C. O. Heinke, P. G. Jonker, R. Wijnands +2
We observed SAX J1808.4-3658 (1808), the first accreting millisecond pulsar, in deep quiescence with XMM-Newton and (near-simultaneously) Gemini-South. The X-ray spectrum of 1808 i…
Optical Observations of SAX J1808.4-3658 During Quiescence
C. J. Deloye, C. O. Heinke, R. E. Taam +1
We observed the accreting millisecond pulsar SAX J1808.4-3658 with Gemini-South in g' and i' bands, nearly simultaneous with XMM-Newton observations. A clear periodic flux modulati…
Orientations of very faint galaxies in the Coma cluster
C. Adami, R. Gavazzi, J. C. Cuillandre +5
We have then searched for preferential orientations of faint galaxies in the Coma cluster (down I_Vega~-11.5). By applying a deconvolution method to deep u* and I band images of th…
Common Envelope Mergers: A Possible Channel for Forming Single sdB Stars
Michael Politano, Ronald E. Taam, Marc van der Sluys +1
We quantify an evolutionary channel for single sdB stars based on mergers of binaries containing a red giant star and a lower mass main sequence or brown dwarf companion in our Gal…
The Growth & Migration of Jovian Planets in Evolving Protostellar Disks with Dead Zones
Soko Matsumura, Ralph E. Pudritz, Edward W. Thommes
The growth of Jovian mass planets during migration in their protoplanetary disks is one of the most important problems that needs to be solved in light of observations of the exoso…
Photometric redshifts as a tool to study the Coma cluster galaxy populations
C. Adami, O. Ilbert, R. Pello +5
We investigate the Coma cluster galaxy luminosity function (GLF) at faint magnitudes, in particular in the u* band by applying photometric redshift techniques applied to deep u*, B…
Understanding Compact Object Formation and Natal Kicks: II. The case of XTE J1118+480
T. Fragos, B. Willems, V. Kalogera +4
In recent years, an increasing number of proper motions have been measured for Galactic X-ray binaries. When supplemented with accurate determinations of the component masses, orbi…
A Catalog of X-ray Point Sources from Two Megaseconds of Chandra Observations of the Galactic Center
M. P. Muno, F. E. Bauer, F. K. Baganoff +23
We present a catalog of 9017 X-ray sources identified in Chandra observations of a 2 by 0.8 degree field around the Galactic center. We increase the number of known X-ray sources i…
Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739
Mercedes Lopez-Morales, R. Paul Butler, Debra A. Fischer +6
We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of M sin i = 4.96 M_Jup and is o…
On The Origins Of Eccentric Close-in Planets
Soko Matsumura, Genya Takeda, Fred Rasio
Strong tidal interaction with the central star can circularize the orbits of close-in planets. With the standard tidal quality factor Q of our solar system, estimated circularizati…
Search for Gravitational Wave Bursts from Soft Gamma Repeaters
LIGO Scientific Collaboration, S. Barthelmy, N. Gehrels +2
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with Soft Gamma Repeater (SGR) bursts. This is the first search sensitive to neutron…
Gas disks to gas giants: Simulating the birth of planetary systems
Edward W. Thommes, Soko Matsumura, Frederic A. Rasio
The ensemble of now more than 250 discovered planetary systems displays a wide range of masses, orbits and, in multiple systems, dynamical interactions. These represent the end poi…
Discovery of Hot Gas in Outflow in NGC3379
G. Trinchieri, S. Pellegrini, G. Fabbiano +10
We report the discovery of a faint (L_x ~ 4 10^37 erg/s, 0.5-2 keV), out-flowing gaseous hot interstellar medium (ISM) in NGC 3379. This represents the lowest X-ray luminosity ever…
On the Properties of Inner Cool Disks in the Hard State of Black Hole X-Ray Transient Systems
Ronald E. Taam, B. F. Liu, F. Meyer +1
The formation of a cool disk in the innermost regions of black hole X-ray transient systems in the low hard state is investigated. Taking into account the combined cooling associat…
Massive Star Formation in the Molecular Ring Orbiting the Black Hole at the Galactic Center
F. Yusef-Zadeh, J. Braatz, M. Wardle +1
A ring of dense molecular gas extending 2-7 pc orbits the supermassive black hole Sgr A* at the center of our Galaxy. Using the Green Bank Telescope, we detected water maser lines…
Induced Kozai Migration and Formation of Close-in Planets in Binaries
Genya Takeda, Ryosuke Kita, Frederic A. Rasio
Many recent observational studies have concluded that planetary systems commonly exist in multiple-star systems. At least ~20%, and presumably a larger fraction of the known extras…
A multiphysics and multiscale software environment for modeling astrophysical systems
Simon Portegies Zwart, Steve McMillan, Stefan Harfst +2
We present MUSE, a software framework for combining existing computational tools for different astrophysical domains into a single multiphysics, multiscale application. MUSE facili…
Probing Electron-Capture Supernovae: X-Ray Binaries in Starbursts
T. Linden, J. F. Sepinsky, V. Kalogera +1
Presenting population models of high-mass X-ray binaries (HMXBs) formed after bursts of star formation, we investigate the effect of electron-capture supernovae (ECS) of massive ON…
How Many CVs are Crossing the Period Gap? A Test for the Disruption of Magnetic Braking
P. J. Davis, U. Kolb, B. Willems +1
We apply population synthesis techniques to calculate the present day number of two types of white dwarf-main sequence star (WDMS) binaries within the cataclysmic variable period g…
X-ray hiccups from SgrA* observed by XMM-Newton. The second brightest flare and three moderate flares caught in half a day
D. Porquet, N. Grosso, P. Predehl +14
[truncated] In Spring 2007, we observed SgrA* with XMM with a total exposure of ~230ks. We have performed timing and spectral analysis of the new X-ray flares detected during this…
Comparison of 3.6 - 8.0 Micron Spitzer/IRAC Galactic Center Survey Point Sources with Chandra X-Ray Point Sources in the Central 40x40 Parsecs
R. G. Arendt, D. Y. Gezari, S. R. Stolovy +8
We have studied the correlation between 2357 Chandra X-ray point sources in a 40 x 40 parsec field and ~20,000 infrared sources we observed in the corresponding subset of our 2 x 1…
The Removal of Artificially Generated Polarization in SHARP Maps
Michael Attard, Martin Houde, Giles Novak +1
We characterize the problem of artificial polarization for the Submillimeter High Angular Resolution Polarimeter (SHARP) through the use of simulated data and observations made at…