Search Publications
Internal structure of spiral arms traced with [C II]: Unraveling the warm ionized medium, H I, and molecular emission lanes
Goldsmith, P. F.; Langer, W. D.; Pineda, J. L. +1 more
Context. The spiral arm tangencies are ideal lines of sight in which to determine the distribution of interstellar gas components in the spiral arms and study the influence of spiral density waves on the interarm gas in the Milky Way. [C II] emission in the tangencies delineates the warm ionized component and the photon-dominated regions and is th…
Experimental determination of the dispersion relation of magnetosonic waves
Dandouras, I.; Walker, S. N.; Yearby, K. H. +4 more
Magnetosonic waves are commonly observed in the vicinity of the terrestrial magnetic equator. It has been proposed that within this region they may interact with radiation belt electrons, accelerating some to high energies. These wave-particle interactions depend upon the characteristic properties of the wave mode. Hence, determination of the wave…
An empirical approach to modeling ion production rates in Titan's ionosphere I: Ion production rates on the dayside and globally
Edberg, N. J. T.; Waite, J. H.; Cravens, T. E. +9 more
Titan's ionosphere is created when solar photons, energetic magnetospheric electrons or ions, and cosmic rays ionize the neutral atmosphere. Electron densities generated by current theoretical models are much larger than densities measured by instruments on board the Cassini orbiter. This model density overabundance must result either from overpro…
First detections of FS Canis Majoris stars in clusters. Evolutionary state as constrained by coeval massive stars
Najarro, F.; Davies, B.; de la Fuente, D. +2 more
Context. FS CMa stars are low-luminosity objects showing the B[e] phenomenon whose evolutionary state remains a puzzle. These stars are surrounded by compact disks of warm dust of unknown origin. Hitherto, membership of FS CMa stars to coeval populations has never been confirmed.
Aims: The discovery of low-luminosity line emitters in the youn…
Dispersal of G-band Bright Points at Different Longitudinal Magnetic Field Strengths
Yang, Yunfei; Feng, Song; Wang, Feng +3 more
G-band bright points (GBPs) are thought to be the foot-points of magnetic flux tubes. The aim of this paper is to investigate the relation between the diffusion regimes of GBPs and the associated longitudinal magnetic field strengths. Two high resolution observations of different magnetized environments were acquired with the Hinode/Solar Optical …
A homogeneous analysis of disks around brown dwarfs
Liu, Y.; Bayo, A.; Wang, H. +2 more
We re-analyzed the Herschel/PACS data of a sample of 55 brown dwarfs (BDs) and very low mass stars with spectral types ranging from M5.5 to L0. We investigated the dependence of disk structure on the mass of the central object in the substellar regime based on a homogeneous analysis of Herschel data from flux density measurements to spectral energ…
Evolution of Intermittency in the Slow and Fast Solar Wind beyond the Ecliptic Plane
Bruno, R.; Wawrzaszek, A.; Macek, W. M. +1 more
We study intermittency as a departure from self-similarity of the solar wind magnetic turbulence and investigate the evolution with the heliocentric distance and latitude. We use data from the Ulysses spacecraft measured during two solar minima (1997-1998 and 2007-2008) and one solar maximum (1999-2001). In particular, by modeling a multifractal s…
Brightest X-Ray Clusters of Galaxies in the CFHTLS Wide Fields: Catalog and Optical Mass Estimator
Finoguenov, A.; Tanaka, M.; Egami, E. +13 more
The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) presents a unique data set for weak-lensing studies, having high-quality imaging and deep multiband photometry. We have initiated an XMM-CFHTLS project to provide X-ray observations of the brightest X-ray-selected clusters within the wide CFHTLS area. Performance of these observations and t…
The Slim-disk State of the Ultraluminous X-Ray Source in M83
Soria, Roberto; Blair, William P.; Kuntz, K. D. +3 more
The transient ULX in M83 that went into outburst in, or shortly before, 2010 is still active. Our new XMM-Newton spectra show that it has a curved spectrum typical of the upper end of the high/soft state or slim-disk state. It appears to be spanning the gap between Galactic stellar-mass black holes (BHs) and the ultraluminous state, at X-ray lumin…
Triangulation of the Interstellar Magnetic Field
McComas, D. J.; Schwadron, N. A.; Richardson, J. D. +2 more
Determining the direction of the local interstellar magnetic field (LISMF) is important for understanding the heliosphere’s global structure, the properties of the interstellar medium, and the propagation of cosmic rays in the local galactic medium. Measurements of interstellar neutral atoms by Ulysses for He and by SOHO/SWAN for H provided some o…