Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Panjab UniversityIN1.9k papers
- University of Illinois ChicagoUS1.9k papers
- Purdue University West LafayetteUS1.9k papers
- Centre National de la Recherche ScientifiqueFR1.8k papers
- Florida State UniversityUS1.8k papers
- Fermi National Accelerator LaboratoryUS1.8k papers
- University of RochesterUS1.7k papers
- University of California, RiversideUS1.7k papers
- University of VirginiaUS1.7k papers
- Brown UniversityUS1.7k papers
- Texas A&M UniversityUS1.7k papers
- University of KansasUS1.7k papers
32 papers · 2 filters
Helioseismic Ring Analysis of CME Source Regions
S. C. Tripathy, S. de Wet, K. Jain +2
We apply the ring diagram technique to source regions of halo coronal mass ejections (CMEs) to study changes in acoustic mode parameters before, during, and after the onset of CMEs…
XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star
Christopher M. Johns-Krull, Peter R. McCullough, Christopher J. Burke +13
We report the discovery of a massive (Mpsini = 13.02 +/- 0.64 Mjup; total mass 13.25 +/- 0.64 Mjup), large (1.95 +/- 0.16 Rjup) planet in a transiting, eccentric orbit (e = 0.260 +…
Warm Molecular Gas in M51: Mapping the Excitation Temperature and Mass of H_2 with the Spitzer Infrared Spectrograph
G. Brunner, K. Sheth, L. Armus +7
We have mapped the warm molecular gas traced by the H_2 S(0) - H_2 S(5) pure rotational mid-infrared emission lines over a radial strip across the nucleus and disk of M51 (NGC 5194…
The double Subgiant Branch of NGC 1851: the role of the CNO abundance
S. Cassisi, M. Salaris, A. Pietrinferni +4
We explore the possibility that the anomalous split in the Subgiant branch of the galactic globular cluster NGC 1851 is due to the presence of two distinct stellar populations with…
Star Spot Induced Radial Velocity Variability in LkCa 19
Marcos Huerta, Christopher M. Johns-Krull, L. Prato +2
We describe a new radial velocity survey of T Tauri stars and present the first results. Our search is motivated by an interest in detecting massive young planets, as well as inves…
Characterizing the Near-UV Environment of M Dwarfs
Lucianne M. Walkowicz, Christopher M. Johns-Krull, Suzanne L. Hawley
We report the results of our HST snapshot survey with the ACS HRC PR200L prism, designed to measure the near-UV emission in a sample of nearby M dwarfs. 33 stars were observed, spa…
GHOSTS | Bulges, Halos, and the Resolved Stellar Outskirts of Massive Disk Galaxies
Roelof S. de Jong, David J. Radburn-Smith, Jonathan N. Sick
In hierarchical galaxy formation the stellar halos of galaxies are formed by the accretion of minor satellites and therefore contain valuable information about the (early) assembly…
Simultaneous Multi-Wavelength Observations of Magnetic Activity in Ultracool Dwarfs. II. Mixed Trends in VB10 and LSR1835+32 and the Possible Role of Rotation
E. Berger, G. Basri, J. E. Gizis +8
[Abridged] As part of our on-going investigation of magnetic activity in ultracool dwarfs we present simultaneous radio, X-ray, UV, and optical observations of LSR1835+32 (M8.5), a…
Multiwavelength Observations of Markarian 421 in March 2001: an Unprecedented View on the X-ray/TeV Correlated Variability
G. Fossati, J. H. Buckley, I. H. Bond +26
(Abridged) We present a detailed analysis of week-long simultaneous observations of the blazar Mrk421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. The…
On the Radial Distribution of White Dwarfs in the Globular Cluster NGC 6397
D. S. Davis, H. B. Richer, I. R. King +5
We have examined the radial distribution of white dwarfs over a single HST/ACS field in the nearby globular cluster NGC 6397. In relaxed populations, such as in a globular cluster,…
The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
A. P. Milone, L. R. Bedin, G. Piotto +13
Photometry with HST's ACS reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an age effect,…
Deep ACS Imaging in the Globular Cluster NGC 6397: The Cluster Color Magnitude Diagram and Luminosity Function
Harvey B. Richer, Aaron Dotter, Jarrod Hurley +9
We present the CMD from deep HST imaging in the globular cluster NGC 6397. The ACS was used for 126 orbits to image a single field in two colors (F814W, F606W) 5 arcmin SE of the c…
Simultaneous Multi-Wavelength Observations of Magnetic Activity in Ultracool Dwarfs. I. The Complex Behavior of the M8.5 Dwarf TVLM513-46546
E. Berger, J. E. Gizis, M. S. Giampapa +8
[Abridged] We present the first simultaneous radio, X-ray, ultraviolet, and optical spectroscopic observations of the M8.5 dwarf TVLM513-46546, with a duration of 9 hours. These ob…
Stellar populations across the NGC4244 truncated galactic disk
Roelof S. de Jong, A. C. Seth, D. J. Radburn-Smith +12
We use HST/ACS to study the resolved stellar populations of the nearby, nearly edge-on galaxy NGC4244 across its outer disk surface density break. The stellar photometry allows us…
The ACS Survey of Galactic Globular Clusters: M54 and Young Populations in the Sagittarius Dwarf Spheroidal Galaxy
Michael H. Siegel, Aaron Dotter, Steven R. Majewski +11
We present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally disrupted Sagittarius (Sgr) dSph galaxy as pa…
Multiwavelength Monitoring of the Unusual Ultraluminous Supernova SN 1978K in NGC 1313 and the Search for an Associated Gamma-Ray Burst
I. A. Smith, S. D. Ryder, M. Boettcher +4
We discuss our radio (Australia Telescope Compact Array and Australian Long Baseline Array) and X-ray (XMM-Newton) monitoring observations of the unusual ultraluminous supernova SN…
Blazar Gamma-Rays, Shock Acceleration, and the Extragalactic Background Light
Floyd W. Stecker, Matthew G. Baring, Errol J. Summerlin
The observed spectra of blazars, their intrinsic emission, and the underlying populations of radiating particles are intimately related. The use of these sources as probes of the e…
The ACS Survey of Galactic Globular Clusters. II. Stellar Evolution Tracks, Isochrones, Luminosity Functions, and Synthetic Horizontal-Branch Models
A. Dotter, B. Chaboyer, D. Jevremovic +4
The ACS Survey of Galactic Globular Clusters, an HST Treasury Project, will deliver high quality, homogeneous photometry of 65 globular clusters. This paper introduces a new collec…
First Results from the XENON10 Dark Matter Experiment at the Gran Sasso National Laboratory
J. Angle, E. Aprile, F. Arneodo +34
The XENON10 experiment at the Gran Sasso National Laboratory uses a 15 kg xenon dual phase time projection chamber (XeTPC) to search for dark matter weakly interacting massive part…
XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary
Christopher J. Burke, P. R. McCullough, Jeff A. Valenti +15
We report on a V=11.2 early K dwarf, XO-2 (GSC 03413-00005), that hosts a Rp=0.98+0.03/-0.01 Rjup, Mp=0.57+/-0.06 Mjup transiting extrasolar planet, XO-2b, with an orbital period o…
The Magnetic Fields of Classical T Tauri Stars
Christopher M. Johns-Krull
We report new magnetic field measurements for 14 classical T Tauri stars (CTTSs). We combine these data with one previous field determination in order to compare our observed field…
A Triple Main Sequence in the Globular Cluster NGC 2808
G. Piotto, L. R. Bedin, J. Anderson +6
Accurate photometry with HST/ACS shows that the main sequence of the globular cluster NGC 2808 splits into three separate branches. The three MS branches may be associated with com…
The multiplicity of the subgiant branch of Omega Centauri: Evidence for prolonged star formation
S. Villanova, G. Piotto, I. R. King +9
We present metallicity measurements based on GIRAFFE@VLT spectra of 80 subgiant-branch stars of the Galactic globular cluster Omega Centauri. The VLT spectroscopic data are complem…
The Distance to the Isolated Neutron Star RX J0720.4-3125
D. L. Kaplan, M. H. van Kerkwijk, J. Anderson
We have used a set of dedicated astrometric data from the Hubble Space Telescope to measure the parallax and proper motion of the nearby neutron star RX J0720.4-3125. At each of ei…