Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Harvard UniversityUS3.4k papers
- California Institute of TechnologyUS2.8k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- University of California, BerkeleyUS2k papers
- Massachusetts Institute of TechnologyUS2k papers
- University of ArizonaUS1.9k papers
- Goddard Space Flight CenterUS1.6k papers
- Space Telescope Science InstituteUS1.6k papers
- Princeton UniversityUS1.5k papers
- Max Planck Institute for AstronomyDE1.4k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.4k papers
- University of MichiganUS1.3k papers
309 papers · 2 filters
The change in the inclination angle of the non-eclipsing binary SS Lacertae: future eclipses
Guillermo Torres
Eclipses in the 14.4-day period double-lined binary SS Lac were observed photographically and visually early in the 20th century, but stopped some 50 or 60 years ago. This has been…
[O II] as a tracer of current star formation
Rolf A. Jansen, Marijn Franx, Daniel Fabricant
[O II] lambda 3727 Angstrom is often used as a tracer of star formation at intermediate redshifts (z > 0.4), where Halpha is not easily observed. We use the spectrophotometric data…
SW Sextantis in an excited, low state
Paul J Groot, Rene' G. M. Rutten, Jan van Paradijs
We present low-resolution spectrophotometric optical observations of the eclipsing nova-like cataclysmic variable SW Sex, the prototype of the SW Sex stars. We observed the system…
New Evidence for Black Hole Event Horizons from Chandra
Michael R. Garcia, Jeffrey E. McClintock, Ramesh Narayan +2
Previously we claimed that Black Hole X-ray Novae (BHXN) in quiescence are much less luminous than equivalent Neutron Star X-ray Novae (NSXN). This claim was based on the quiescent…
Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
W. L. Freedman, B. F. Madore, B. K. Gibson +12
We present here the final results of the Hubble Space Telescope Key Project to measure the Hubble constant. We summarize our method, the results and the uncertainties, tabulate our…
The X-ray emission of 3C 346 and its environment
D. M. Worrall, M. Birkinshaw
We present a detailed spectral and spatial analysis of the X-ray properties of the compact and unusual radio galaxy 3C 346, combining information from ROSAT and ASCA. The dominant…
ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
G. Meeus, L. B. F. M. Waters, J. Bouwman +3
We present Infrared Space Observatory (ISO) spectra of fourteen isolated Herbig Ae/Be (HAEBE) stars, to study the characteristics of their circumstellar dust. These spectra show la…
Far Ultraviolet Spectra of B Stars near the Ecliptic
C. Morales, V. Orozco, J. F. Gomez +7
Spectra of B stars in the wavelength range of 911-1100 A have been obtained with the EURD spectrograph onboard the Spanish satellite MINISAT-01 with ~5 A spectral resolution. IUE s…
Accretion onto nearby supermassive black holes: Chandra constraints on the dominant cluster galaxy NGC 6166
T. Di Matteo, R. M. Johnstone, S. W. Allen +1
Chandra observations of low-luminosity supermassive black holes in nearby elliptical galaxies provide tight limits on both their nuclear luminosities and on their Bondi accretion r…
Structure of the X-ray Emission from the Jet of 3C 273
H. L. Marshall, D. E. Harris, J. P. Grimes +12
We present images from five observations of the quasar 3C 273 with the Chandra X-ray Observatory. The jet has at least four distinct features which are not resolved in previous obs…
Galaxy Cluster Gas Mass Fractions from Sunyaev-Zel'dovich Effect Measurements: Constraints on Omega_M
Laura Grego, John E. Carlstrom, Erik D. Reese +5
Using sensitive centimeter-wave receivers mounted on the Owens Valley Radio Observatory and Berkeley-Illinois-Maryland-Association millimeter arrays, we have obtained interferometr…
The Formation of Black-Hole X-Ray Transients
V. Kalogera
Studies of the observed characteristics of black-hole (BH) X-ray binaries can be provide us with valuable information about the process of BH formation. In this paper I address som…
How astrophysical mean field dynamos can circumvent existing quenching constraints
Eric G. Blackman, George B. Field
Mean field dynamo theory is a leading candidate to explain the observed large scale magnetic fields of galaxies and stars. However, controversy arises over the extent of premature…
The halo model and numerical simulations
Martin White, Lars Hernquist, Volker Springel
Recently there has been a lot of attention focussed on a virialized halo-based approach to understanding the properties of the matter and galaxy power spectrum. A key ingredient in…
Numerical Analysis of Magnetic Field Amplification by Turbulence
Hongsong Chou
We apply a Fourier spectral numerical method to 3D incompressible MHD turbulence with a magnetic Prandtl number . We examine the processes by which an initially weak, la…
Towards a Precise Measurement of Matter Clustering: Lyman-alpha Forest Data at Redshifts 2-4
Rupert A. C. Croft, David H. Weinberg, Mike Bolte +5
We measure the filling factor, correlation function, and power spectrum of transmitted flux in a large sample of Lya forest spectra, comprised of 30 Keck HIRES spectra and 23 Keck…
Evidence for a Supermassive Black Hole in the S0 Galaxy NGC 3245
A. J. Barth, M. Sarzi, H. -W. Rix +3
The S0 galaxy NGC 3245 contains a circumnuclear disk of ionized gas and dust with a radius of 1.1" (110 pc), making it an ideal target for dynamical studies with the Hubble Space T…
The DIRECT Project: Catalogs of Stellar Objects in Nearby Galaxies. I. The Central Part of M33
L. M. Macri, K. Z. Stanek, D. D. Sasselov +2
The DIRECT project aims to determine direct distances to two important galaxies in the cosmological distance ladder -- M31 and M33 -- using detached eclipsing binaries (DEBs) and C…
A New Formation Channel for Double Neutron Stars Without Recycling: Implications for Gravitational Wave Detection
K. Belczynski, V. Kalogera
We report on a new evolutionary path leading to the formation of close double neutron stars (NS), with the unique characteristic that none of the two NS ever had the chance to be r…
Sunyaev-Zel'dovich Effect Imaging of Massive Clusters of Galaxies at Redshift z > 0.8
Marshall Joy, Samuel LaRoque, Laura Grego +6
We present Sunyaev-Zel'dovich Effect (SZE) imaging observations of three distant (z > 0.8) and highly X-ray luminous clusters of galaxies, Cl1226+33, Cl0152-13 and MS1054-03. Two o…
The Coalescence Rate of Double Neutron Star Systems
V. Kalogera, R. Narayan, D. N. Spergel +1
We estimate the coalescence rate of close binaries with two neutron stars (NS) and discuss the prospects for the detection of NS-NS inspiral events by ground-based gravitational-wa…
AD Leo from X-Rays to Radio: Are Flares Responsible for the Heating of Stellar Coronae?
M. Guedel, M. Audard, E. F. Guinan +4
In spring 1999, a long coordinated observing campaign was performed on the flare star AD Leo, including {\it EUVE}, {\it BeppoSAX}, the {\it VLA}, and optical telescopes. The campa…
Stellar Pollution in the Solar Neighborhood
N. Murray, B. Chaboyer, B. Hansen +2
We study spectroscopically determined iron abundances of 642 solar-type stars to search for the signature of accreted iron-rich material. We find that the metallicity [Fe/H] of a s…
What is the Highest Plausible Redshift of Luminous Quasars?
Zoltan Haiman, Abraham Loeb
The recent discoveries of luminous quasars at high redshifts imply that black holes more massive than a few billion solar masses have been assembled already when the universe was l…