Search Publications
MOST Space-based Photometry of the Transiting Exoplanet System HD 209458: Transit Timing to Search for Additional Planets
Moffat, Anthony F. J.; Rucinski, Slavek M.; Rowe, Jason F. +7 more
We report on the measurement of transit times for the HD 209458 planetary system from photometry obtained with the MOST (Microvariability and Oscillations of Stars) space telescope. Deviations from a constant orbital period can indicate the presence of additional planets in the system that are yet undetected, potentially with masses approaching an…
The Red Sequence of High-Redshift Clusters: A Comparison with Cosmological Galaxy Formation Models
Demarco, R.; Rosati, P.; Gobat, R. +4 more
We compare the results from a state-of-the-art semianalytic model of galaxy formation with spectrophotometric observations of distant galaxy clusters observed in the range 0.8 <= z<= 1.3. We investigate the properties of their red sequence (RS) galaxies and compare them with those of the field at the same redshift. In our model we find that …
Study of Magnetic Channel Structure in Active Region 10930
Jing, Ju; Wang, Haimin; Tan, Changyi +2 more
The concept of "magnetic channel" was first introduced by Zirin & Wang. They were defined as a series of oppositely directed vertical-field inversions separated by extremely narrow elongated transverse fields. In this paper, we utilized unprecedented filtergraph and spectropolarimetry observations from Hinode, and studied the evolution and phy…
A Massive-Star-forming Infrared Loop around the Crab-like Supernova Remnant G54.1+0.3: Post-Main-Sequence Triggered Star Formation?
Lee, Jeong-Eun; Onaka, Takashi; Koo, Bon-Chul +6 more
We report the discovery of a star-forming loop around the young, Crab-like supernova remnant (SNR) G54.1+0.3 using the AKARI infrared satellite. The loop consists of at least 11 young stellar objects (YSOs) embedded in a ringlike diffuse emission of radius ~1'. The YSOs are bright in the mid-infrared and are also visible in the Spitzer Space Teles…
Washington CCD Photometry of the Globular Cluster System of the Giant Elliptical Galaxy M60 in Virgo
Lee, Myung Gyoon; Hwang, Ho Seong; Geisler, Doug +3 more
We present a photometric study of the GCs in the giant elliptical galaxy M60 in the Virgo Cluster, based on deep, relatively wide field Washington CT1 CCD images. The CMD reveals a significant population of GCs in M60 and a large number of young luminous clusters in NGC 4647, a small companion spiral northwest of M60. The color distribu…
CME Earthward Direction as an Important Geoeffectiveness Indicator
Cho, K. -S.; Kim, K. -H.; Moon, Y. -J. +7 more
Frontside halo coronal mass ejections (CMEs) are generally considered as potential candidates for producing geomagnetic storms, but there was no definite way to predict whether they will hit the Earth or not. Recently Moon et al. suggested that the degree of CME asymmetries, as defined by the ratio of the shortest to the longest distances of the C…
The Solar Wind Power from Magnetic Flux
McComas, D. J.; Schwadron, N. A.
Observations of the fast, high-latitude solar wind throughout Ulysses' three orbits show that solar wind power correlates remarkably well with the Sun's total open magnetic flux. These observations support a recent model of the solar wind energy and particle sources, where magnetic flux emergence naturally leads to an energy flux proportional to t…
Hyperdiffusion as a Mechanism for Solar Coronal Heating
Cranmer, S. R.; van Ballegooijen, A. A.
A theory for the heating of coronal magnetic flux ropes is developed. The dissipated magnetic energy has two distinct contributions: (1) energy injected into the corona as a result of granule-scale, random footpoint motions and (2) energy from the large-scale, nonpotential magnetic field of the flux rope. The second type of dissipation can be desc…
A New Red Giant-based Distance Modulus of 13.3 Mpc to the Antennae Galaxies and Its Consequences
Rich, R. Michael; Saviane, Ivo; Da Costa, Gary S. +2 more
The Antennae galaxies are the closest example of an ongoing major galaxy merger and, as such, represent a unique laboratory for furthering the understanding of the formation of exotic objects (e.g., tidal dwarf galaxies, ultraluminous X-ray sources, super stellar clusters). In a previous paper HST WFPC2 observations were used to demonstrate that t…
Molecular Gas in the z = 1.2 Ultraluminous Merger GOODS J123634.53+621241.3
Dickinson, Mark; Chary, Ranga-Ram; Pope, Alexandra +14 more
We report the detection of CO(2→1) emission from the z = 1.2 ultraluminous infrared galaxy (ULIRG) GOODS J123634.53+621241.3 (also known as the submillimeter galaxy GN 26). These observations represent the first discovery of high-redshift CO emission using the new Combined Array for Research in Millimeter-Wave Astronomy (CARMA). Of all high-redshi…