Search Publications
Magnetic Topology of Actively Evolving and Passively Convecting Structures in the Turbulent Solar Wind
Chapman, S. C.; Hnat, B.; Watkins, N. W.
Multipoint in situ observations of the solar wind are used to identify the magnetic topology and current density of turbulent structures. We find that at least 35% of all structures are both actively evolving and carrying the strongest currents, actively dissipating, and heating the plasma. These structures are comprised of ∼1 /5 3D plasmoids, ∼3 …
Probing galactic double-mode RR Lyrae stars against Gaia EDR3
Kovacs, Geza; Karamiqucham, Behrooz
Context. Classical double-mode pulsators (RR Lyrae stars and δ Cepheids) are important because of their simultaneous pulsation in low-order radial modes. This enables us to place stringent constraints on their physical parameters.
Aims: We use 30 bright galactic double-mode RR Lyrae (RRd) stars to estimate their luminosities and compare these…
Cross-Scale Energy Transport in Space Plasmas: Applications to the Magnetopause Boundary
Nykyri, Katariina; Ma, Xuanye; Johnson, Jay
15 years of galactic surveys and hard X-ray background measurements
Tsygankov, Sergey S.; Sunyaev, Rashid; Kuulkers, Erik +15 more
The INTEGRAL hard X-ray surveys have proven to be of fundamental importance. INTEGRAL has mapped the Galactic plane with its large field of view and excellent sensitivity. Such hard X-ray snapshots of the whole Milky Way on a time scale of a year are beyond the capabilities of past and current narrow-FOV grazing incidence X-ray telescopes. By expa…
The Magnetosheath
Plaschke, Ferdinand; Vörös, Zoltán; Narita, Yasuhito
Physical and Chemical Structure of the Disk and Envelope of the Class 0/I Protostar L1527
Flock, Mario; Terebey, Susan; Isella, Andrea +3 more
Submillimeter spectral line and continuum emission from the protoplanetary disks and envelopes of protostars is a powerful probe of their structure, chemistry, and dynamics. Here we present a benchmark study of our modeling code, RadChemT, that for the first time uses a chemical model to reproduce ALMA C18O (2-1), and CARMA 12
Multi Spacecraft Measurement of Anisotropic Spatial Correlation Functions at Kinetic Range in the Magnetosheath Turbulence
Zhang, J.; Deng, X. H.; Huang, S. Y. +9 more
We investigate spatial correlation functions (SCFs) at kinetic range in the terrestrial magnetosheath because of wide angular distributions of the magnetic field fluctuations and the high Signal to Noise Ratio. We employ four point measurements of magnetic fluctuations from the Cluster and MMS concerning a spatiotemporally varying background magne…
2M17091769+3127589: A Mass-transfer Binary with an Extreme Mass Ratio
Stassun, Keivan G.; Kounkel, Marina; Covey, K. R. +5 more
We present the orbital solution of a peculiar double-lined spectroscopic and eclipsing binary system, 2M17091769+3127589. This solution was obtained by a simultaneous fit of both APOGEE radial velocities and TESS and ASAS-SN light curves to determine masses and radii. This system consists of an $M={0.256}_{-0.006}^{+0.010}$ M⊙, $R={3.96…
CaSSIS Color and multi-angular observations of martian slope streaks
Patel, M. R.; Pajola, M.; Cremonese, G. +12 more
Slope streaks are albedo features that form frequently on equatorial Martian slopes. Most slope streaks are dark relative to surrounding terrains, a minor fraction is bright, and there are rare transitioning streaks that exhibit a contrast reversal partway downslope. Their formation mechanisms and physical surface properties are not well understoo…
Extended HNCO, SiO, and HC3N Emission in 43 Southern Star-forming Regions
Liu, Hong-Li; Zhou, Jian-Jun; Wu, Gang +9 more
We have selected 43 southern massive star-forming regions to study the spatial distribution of HNCO 404-303, SiO 2-1, and HC3N 10-9 line emission and to investigate their spatial association with the dust emission. The morphology of HNCO 404-303 and HC3N 10-9 agrees well with the du…