Search Publications
Resolving the shocked gas in HH 54 with Herschel. CO line mapping at high spatial and spectral resolution
Olofsson, G.; Liseau, R.; Benedettini, M. +11 more
Context. The HH 54 shock is a Herbig-Haro object, located in the nearby Chamaeleon II cloud. Observed CO line profiles are due to a complex distribution in density, temperature, velocity, and geometry.
Aims: Resolving the HH 54 shock wave in the far-infrared (FIR) cooling lines of CO constrain the kinematics, morphology, and physical conditio…
High-Resolution Optical Spectroscopy of the R Coronae Borealis Star V532 Ophiuchi at Maximum Light
Lambert, David L.; Kameswara Rao, N.; Hema, B. P. +1 more
Not Available
Based on observations obtained with the Harlan J. Smith Telescope of McDonald Observatory of the University of Texas at Austin.The Massive Star Population in M101. II. Spatial Variations in the Recent Star Formation History
Humphreys, Roberta M.; Grammer, Skyler
We investigate star formation history (SFH) as a function of radius in M101 using archival Hubble Space Telescope Advanced Camera for Surveys photometry. We derive the SFH from the resolved stellar populations in five 2' wide annuli. Binning the SFH into time frames corresponding to stellar populations traced by Hα, far-ultraviolet, and near-ultra…
Observation of High Iron Charge States at Low Energies in Solar Energetic Particle Events
Bochsler, P.; Klecker, B.; Möbius, E. +5 more
The ionic charge states of solar energetic particles (SEPs) provide direct information about the source plasma, the acceleration environment, and their transport. Recent studies report that both gradual and impulsive SEP events show mean iron charge states langQ Ferang ~ 10-14 at low energies E <= 0.1 MeV nuc-1, consistent…
Probing the Mysteries of the X-Ray Binary 4U 1210-64 with ASM, PCA, MAXI, BAT, and Suzaku
Pottschmidt, Katja; Corbet, Robin H. D.; Mukai, Koji +1 more
4U 1210-64 has been postulated to be a high-mass X-ray binary powered by the Be mechanism. X-ray observations with Suzaku, the ISS Monitor of All-sky X-ray Image (MAXI), and the Rossi X-ray Timing Explorer Proportional Counter Array (PCA) and All Sky Monitor (ASM) provide detailed temporal and spectral information on this poorly understood source.…
Sub-millimeter observation of water vapor at 557 GHz in Comet C/2002 T7 (LINEAR)
Choukroun, Mathieu; Janssen, Michael; Keihm, Stephen +9 more
We present sub-millimeter observations of the ground-state rotational transition (110-101) of water vapor from Comet C/2002 T7 (LINEAR) obtained with the MIRO instrument on the ESA Rosetta spacecraft (s/c) orbiter on April 30, 2004. At the time of the observations, the comet was at a distance of 0.63 AU from the Sun, 0.68 AU …
Aperiodic X-ray flux variability of EX Hya and the area of the base of the accretion column at the white dwarf surface
Revnivtsev, M. G.; Semena, A. N.
The goal of this paper is to determine the characteristic cooling time of the accretion flowmatter near the surface of the magnetic white dwarf in the binary system EX Hya. Most of the X-ray photons in such binary systems are produced in an optically thin hot plasma with a temperature above 10 keV heated when the matter passes through the shock ne…
Calibrating Mars Orbiter Laser Altimeter pulse widths at Mars Science Laboratory candidate landing sites
Muller, Jan-Peter; Grindrod, Peter M.; Gupta, Sanjeev +1 more
Accurate estimates of surface roughness allow quantitative comparisons between planetary terrains. These comparisons enable us to improve our understanding of commonly occurring surface processes, and develop a more complete analysis of candidate landing and roving sites. A (secondary) science goal of the Mars Orbiter Laser Altimeter was to map su…
Take up the challenge for a single field inflation after BICEP2
Feng, Chao-Jun; Li, Xin-Zhou
The measurement of the tensor-to-scalar ratio r shows a very powerful constraint to theoretical inflation models through the detection of B-mode. In this paper, we propose a single inflation model with infinity power series potential called the Infinity Power Series (IPS) inflation model, which is well consistent with latest observations from Plan…
Observational effects of the early episodically dominating dark energy
Park, Chan-Gyung; Lee, Jae-heon; Hwang, Jai-chan +1 more
We investigate the observational consequences of the early episodically dominating dark energy on the evolution of cosmological structures. For this aim, we introduce the minimally coupled scalar-field dark energy model with the Albrecht-Skordis potential, which allows a sudden ephemeral domination of a dark energy component during the radiation o…