Search Publications
Exploring Damped Lyα System Host Galaxies Using Gamma-Ray Bursts
Cenko, S. Bradley; Rafelski, Marc; Veilleux, Sylvain +6 more
We present a sample of 45 Damped Lyα system (DLA; {N}{{H}{{I}}} ≥slant 2× {10}20 {{cm}}-2) counterparts (33 detections, 12 upper limits) which host gamma-ray bursts (GRB-DLAs) in order to investigate star formation and metallicity within galaxies hosting DLAs. Our sample spans z∼ 2{--}6 and is nearly three times la…
Diagnosing the Source Region of a Solar Burst on 26 September 2011 by Using Microwave Type-III Pairs
Huang, J.; Yan, Y.; Karlický, M. +4 more
We report a peculiar and interesting train of microwave Type-III pair bursts in the impulsive rising phase of a solar flare on 26 September 2011. The observations include radio spectrometers at frequencies of 0.80 - 2.00 GHz from the Ondřejov radiospectrograph in the Czech Republic (ORSC), hard X-ray from the Ramaty High-Energy Solar Spectroscopic…
Spectroscopy of Luminous Compact Blue Galaxies in Distant Clusters. II. Physical Properties of dE Progenitor Candidates
Randriamampandry, S. M.; Wirth, Gregory D.; Bershady, M. A. +1 more
Luminous Compact Blue Galaxies (LCBGs) are an extreme star-bursting population of galaxies that were far more common at earlier epochs than today. Based on spectroscopic and photometric measurements of LCBGs in massive (M > 1015 M⊙), intermediate redshift (0.5 < z < 0.9) galaxy clusters, we present their rest-frame p…
The Young Stellar Population of Lynds 1340. An Infrared View
Apai, D.; Balog, Z.; Kun, M. +4 more
We present results of an infrared study of the molecular cloud Lynds 1340, forming three groups of low- and intermediate-mass stars. Our goals are to identify and characterize the young stellar population of the cloud, study the relationships between the properties of the cloud and the emergent stellar groups, and integrate L1340 into the picture …
The role of deviation of magnetic field direction on the beaming angle: Extending of beaming angle theory
Katoh, Yuto; Kalaee, Mohammad Javad
In the beaming angle theory, the magnetic field direction is assumed perpendicular to the normal boundary, and the prediction of this theory, from beaming angle is base on the Jones' formula. We investigate the effect of deviation the magnetic field direction respect to normal boundary direction. In this study, we present new conditions that under…
Potential vorticity of the south polar vortex of Venus
Hueso, R.; Sánchez-Lavega, A.; García Muñoz, A. +1 more
Venus' atmosphere shows highly variable warm vortices over both of the planet's poles. The nature of the mechanism behind their formation and properties is still unknown. Potential vorticity is a conserved quantity when advective processes dominate over friction and diabatic heating and is a quantity frequently used to model balanced flows. As a s…
Identifying the magnetotail lobes with Cluster magnetometer data
Jackman, C. M.; Forsyth, C.; Rae, I. J. +2 more
We describe a novel method for identifying times when a spacecraft is in Earth's magnetotail lobes solely using magnetometer data. We propose that lobe intervals can be well identified as times when the magnetic field is strong and relatively invariant, defined using thresholds in the magnitude of BX and the standard deviation σ of the …
Broad-band spectroscopy of the transient X-ray binary pulsar KS 1947+300 during 2013 giant outburst: Detection of pulsating soft X-ray excess component
Naik, Sachindra; Jaisawal, Gaurava K.; Epili, Prahlad
We present the results obtained from detailed timing and spectral studies of the Be/X-ray binary pulsar KS 1947+300 during its 2013 giant outburst. We used data from Suzaku observations of the pulsar at two epochs, i.e. on 2013 October 22 (close to the peak of the outburst) and 2013 November 22. X-ray pulsations at ∼18.81 s were clearly detected i…
Mixed inflaton and spectator field models: CMB constraints and µ distortion
Takahashi, Tomo; Sekiguchi, Toyokazu; Enqvist, Kari
We discuss mixed inflaton and spectator field models where both the fields are responsible for the observed density fluctuations. We combine the angular power spectrum of the CMB temperature anisotropy from the Planck 2013 result and other ground-based CMB observations in order to constrain both the general mixed model as well as some specific rep…
Penetration of magnetosheath plasma into dayside magnetosphere: 1. Density, velocity, and rotation
Goldstein, Melvyn L.; Pollock, Craig; Lyatsky, Wladislaw +2 more
In this study, we examine a large number of plasma structures (filaments), observed with the Cluster spacecraft during 2 years (2007-2008) in the dayside magnetosphere but consisting of magnetosheath plasma. To reduce the effects observed in the cusp regions and on magnetosphere flanks, we consider these events predominantly inside the narrow cone…