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
482 papers · 1 filter
The simultaneous VLA observations of Sgr A* from 90 to 0.7 cm
T. An, J. -H. Zhao, X. -Y. Hong +4
We present a spectrum of Sgr A* observed simultaneously on June 17, 2003 at wavelengths from 90 to 0.7 cm with the VLA. In the spectrum, we also include the measurements of Sgr A*…
Dwarf Seyfert 1 Nuclei and the Low-Mass End of the M-sigma Relation
A. J. Barth, J. E. Greene, L. C. Ho
To examine the relationship between black hole mass and host galaxy velocity dispersion for low black hole masses, we have measured the velocity dispersions of 15 Seyfert 1 galaxie…
A Far-Ultraviolet Spectroscopic Survey of Luminous Cool Stars
A. K. Dupree, A. Lobel, P. R. Young +3
FUSE ultraviolet spectra of 8 giant and supergiant stars reveal that high temperature (3 X 10^5 K) atmospheres are common in luminous cool stars and extend across the color-magnitu…
Present Evidence for Intermediate Mass Black Holes in ULXs and Future Prospects
J. M. Miller
In a number of the most luminous ULXs (L ~ 1 E+40 erg/s) in nearby galaxies, observations with XMM-Newton and Chandra are revealing evidence which suggests that these ULXs may harb…
The radio counter-jet of the QSO 3C~48
W. X. Feng, T. An, X. Y. Hong +4
We present multi--frequency radio observational results of the quasar 3C~48. The observations were carried out with the Very Large Array (VLA) at five frequencies of 0.33, 1.5, 4.8…
The History of the Mysterious Eclipses of KH 15D II. Asiago, Kiso, Kitt Peak, Mt. Wilson, Palomar, Tautenburg and Rozhen Observatories, 1954-97
John Asher Johnson, Joshua N. Winn, Francesca Rampazzi +6
The unusual pre-main-sequence binary star named KH 15D undergoes remarkably deep and long-lasting periodic eclipses. Some clues about the reason for these eclipses have come from t…
Complete Multiwavelength Characterization of Faint Chandra X-ray Sources Seen in the Spitzer Wide-Area IR Extragalactic (SWIRE) Survey
A. Franceschini, J. Manners, M. Polletta +24
We exploit deep combined observations with Spitzer and Chandra of the SWIRE survey in the ELAIS-N1 region, to investigate the nature of the faint X-ray and IR sources in common, to…
Evn, Merlin, and Vla Observations of Nrao530
X. Y. Hong, J. H. Zhao, T. An +4
We present images of NRAO530 observed with the EVN (VLBI) at 5 GHz, the MERLIN at 1 .6 and 5 GHz, and the VLA at 5 and 8 GHz showing the complex morphology on scales from pc to kpc…
A new Search for Carbon Monoxide Absorption in the Transmission Spectrum of the Extrasolar Planet HD 209458b
Drake Deming, Timothy M. Brown, David Charbonneau +2
We have revisited the search for carbon monoxide absorption features in transmission during the transit of the extrasolar planet HD 209458b. We acquired 1077 high resolution spectr…
HI Narrow Self-Absorption in Dark Clouds: Correlations with Molecular Gas and Implications for Cloud Evolution and Star Formation
P. F. Goldsmith, D. Li
We present the results of a comparative study of HI narrow self-absorption (HINSA), OH, 13CO, and C18O in five dark clouds. The HINSA follows the distribution of the emission of th…
Determining the grain composition of the interstellar medium with high resolution X-ray spectroscopy
Julia C. Lee, Bruce Ravel
We investigate the ability of high resolution X-ray spectroscopy to directly probe the grain composition of the interstellar medium. Using iron K-edge experimental data of likely I…
Clues on the Structure and Composition of Galactic Disks from Studies of "Superthin" Spirals: the Case of UGC3697
Lynn D. Matthews, Juan M. Uson
We summarize results from an HI+optical imaging study of the ``Integral Sign'' galaxy, UGC3697. UGC3697 is a low-mass, Sd spiral that exhibits a ``superthin'' disk morphology despi…
Geometrical constraints upon the unipolar model of V407 Vul and RXJ0806.3+1527
S. C. C. Barros, T. R. Marsh, P. Groot +5
V407 Vul and RX J0806.3+1527 are X-ray emitting stars with X-ray light curves that are 100% modulated on periods of 569 and 321 seconds respectively. These periods and no others ar…
A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei
J. A. Braatz, C. Henkel, L. J. Greenhill +2
Using the Green Bank Telescope, we have conducted a survey for 1.3 cm water maser emission toward the nuclei of nearby active galaxies, the most sensitive large survey for H2O mase…
A Possible Detection of M31* with Chandra
M. R. Garcia, B. F. Williams, F. Yuan +5
Two independent sets of Chandra and HST images of the nuclear region of M31 allow registration of X-ray and optical images to 0.1''. This registration shows that none of the bright…
Imaging Protoplanetary Disks with a Square Kilometer Array
D. J. Wilner
The recent detections of extrasolar giant planets has revealed a surprising diversity of planetary system architectures, with many very unlike our Solar System. Understanding the o…
WWW Database of Models of Accretion Disks Irradiated by The Central Star
Paola D'Alessio, Bruno Merin, Nuria Calvet +2
We announce the release of a catalog of physical models of irradiated accretion disks around young stars based on the modelling techniques by D'Alessio et al. The WWW catalog inclu…
Multi-Temperature Blackbody Spectrum of a Thin Accretion Disk around a Kerr Black Hole: Model Computations and Comparison with Observations
Li-Xin Li, Erik R. Zimmerman, Ramesh Narayan +1
We use a ray-tracing technique to compute the observed spectrum of a thin accretion disk around a Kerr black hole. We include all relativistic effects such as frame-dragging, Doppl…
The Outburst of V1647 Ori Revealed by Spitzer
J. Muzerolle, S. T. Megeath, K. M. Flaherty +4
We present Spitzer Space Telescope observations of V1647 Ori, the outbursting source lighting McNeil's nebula, taken near the optical peak of the outburst in early March 2004. The…
A catalog of bright calibrator stars for 200-meter baseline near-infrared stellar interferometry
A. Merand, P. Borde, V. Coude du Foresto
We present in this paper a catalog of reference stars suitable for calibrating infrared interferometric observations. In the K band, visibilities can be calibrated with a precision…
Turbulence in Class 0 and Class I protostellar envelopes
D. Ward-Thompson, L. Hartmann, D. J. Nutter
We estimate the levels of turbulence in the envelopes of Class 0 and I protostars using a model based on measurements of the peak separation of double-peaked asymmetric line profil…
Close-coupling calculations of low-energy inelastic and elastic processes in He collisions with H: A comparative study of two potential energy surfaces
T. G. Lee, C. Rochow, R. Martin +7
The two most recently published potential energy surfaces (PESs) for the HeH complex, the so-called MR (Muchnick and Russek) and BMP (Boothroyd, Martin, and Peterson) surfaces,…
Dating COINS: Kinematic Ages for Compact Symmetric Objects
N. E. Gugliucci, G. B. Taylor, A. B. Peck +1
We present multi-epoch VLBA observations of Compact Symmetric Objects (CSOs) from the COINS sample (CSOs Observed In the Northern Sky). These observations allow us to make estimate…
XMM-Newton Observation of an X-ray Trail Between the Spiral Galaxy NGC6872 and the Central Elliptical NGC6876 in the Pavo Group
M. Machacek, P. Nulsen, L. Stirbat +2
We present XMM-Newton observations of a trail of enhanced X-rayemission extending along the 8'.7 X 4' region between the spiral NGC6872 and the dominant elliptical NGC6876 in the P…