Search Publications
Mid-infrared luminosity function of local star-forming galaxies in the North Ecliptic Pole-Wide survey field of AKARI
Goto, Tomotsugu; Kim, Seong Jin; Im, Myungshin +6 more
We present mid-infrared (MIR) luminosity functions (LFs) of local (z < 0.3) star-forming (SF) galaxies in the AKARI's North Ecliptic Pole (NEP)-Wide survey field. In order to derive more accurate LF, we used spectroscopic sample only. Based on the NEP-Wide point source catalogue containing a large number of infrared (IR) sources distributed ove…
Spectral comparison and stability of red regions on Jupiter
Simon, Amy A.; Sanchez-Lavega, Agustin; Legarreta, Jon +4 more
A rare red cyclone visible on Jupiter in 1994 and 1995 falls in a class of vortices that are intensely colored, yet low altitude, unlike the Great Red Spot (GRS). Dynamical modeling indicates that the presence of nearby anticyclones both aids in formation and lead to the destruction of the cyclone. A study of absolute spectral reflectance from Hub…
The CoRoT chemical peculiar target star HD 49310
Paunzen, E.; Weiss, W. W.; Fröhlich, H. -E. +2 more
Context. The magnetic chemically peculiar (CP) stars of the upper main sequence are well-suited laboratories for investigating the influence of local magnetic fields on the stellar surface because they produce inhomogeneities (spots) that can be investigated in detail as the star rotates.
Aims: We studied the inhomogeneous surface structure o…
Non-elliptic wavevector anisotropy for magnetohydrodynamic turbulence
Narita, Y.
A model of non-elliptic wavevector anisotropy is developed for the inertial-range spectrum of magnetohydrodynamic turbulence and is presented in the two-dimensional wavevector domain spanning the directions parallel and perpendicular to the mean magnetic field.
The non-elliptic model is a variation of the elliptic model with different sca…
Probabilistic constraints from existing and future radar imaging on volcanic activity on Venus
Lorenz, Ralph D.
We explore the quantitative limits that may be placed on Venus' present-day volcanic activity by radar imaging of surface landforms. The apparent nondetection of new lava flows in the areas observed twice by Magellan suggests that there is a ~60% chance that the eruption rate is ~1 km3/yr or less, using the eruption history and area/vol…
Identification of the dominant ULF wave mode and generation mechanism for obliquely propagating waves in the Earth's foreshock
Stasiewicz, K.; Grzesiak, M.; Karimabadi, H. +3 more
We discuss mechanisms of the generation of ultralow frequency (ULF) upstream waves in the terrestrial foreshock that are essential for the acceleration of ions in space plasmas. The analysis is based on global hybrid kinetic simulations of the magnetosphere that provide realistic environment for the growth of the ULF waves in a quasi-radial config…
Constraints to the magnetospheric properties of T Tauri stars - II. The Mg II ultraviolet feature
López-Martínez, Fatima; Gómez de Castro, Ana Inés
The atmospheric structure of T Tauri stars (TTSs) and its connection with the large-scale outflow is poorly known. Neither the effect of the magnetically mediated interaction between the star and the disc is well understood. The Mg ii multiplet is a fundamental tracer of TTSs atmospheres and outflows, and is the strongest feature in the near-ultra…
A weak lensing analysis of the PLCK G100.2-30.4 cluster
Dahle, H.; Aghanim, N.; Arnaud, M. +12 more
We present a mass estimate of the Planck-discovered cluster PLCK G100.2-30.4, derived from a weak lensing analysis of deep Subaru griz images. We perform a careful selection of the background galaxies using the multi-band imaging data, and undertake the weak lensing analysis on the deep (1 h) r -band image. The shape measurement is based on the Ka…
X-Ray Perspective of the Twisted Magnetospheres of Magnetars
Göğüş, Ersin; Weng, Shan-Shan; Lin, Lin +1 more
Anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) are recognized as the most promising magnetar candidates, as indicated by their energetic bursts and rapid spin-downs. It is expected that the strong magnetic field leaves distinctive imprints on the emergent radiation both by affecting the radiative processes in atmospheres of mag…
Far-ultraviolet Study of the ζ-Ophiuchi H II Region
Choi, Yeon-Ju; Min, Kyoung-Wook; Seon, Kwang-Il
We report the results of our analysis of the H II region around ζ Oph based on far-ultraviolet (FUV) spectral imaging observations, together with data made in other wavelengths. We found that scattering by dust grains of the FUV photons, which originate mostly from ζ Oph, dominates the FUV emission in this region, while contributions from the two-…