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Magnetic Flux Rope Shredding By a Hyperbolic Flux Tube: The Detrimental Effects of Magnetic Topology on Solar Eruptions
Vourlidas, Angelos; Stenborg, Guillermo; Chintzoglou, Georgios +3 more
We present the analysis of an unusual failed eruption captured in high cadence and in many wavelengths during the observing campaign in support of the Very high Angular resolution Ultraviolet Telescope (VAULT2.0) sounding rocket launch. The refurbished VAULT2.0 is a Lyα (λ 1216 Å) spectroheliograph launched on 2014 September 30. The campaign targe…
A Universal Correlation between Star Formation Activity and Molecular Gas Properties Across Environments
Nakagawa, Takao; Suzuki, Tomoko L.; Koyama, Yusei +10 more
We present the molecular gas mass fraction ({f}{{{H}}2}) and star formation efficiency (SFE) of local galaxies on the basis of our new CO(J=1-0) observations with the Nobeyama 45 m radio telescope, combined with the COLDGASS galaxy catalog, as a function of galaxy environment defined as the local number density of galaxies me…
NuSTAR Hard X-Ray Observations of the Energetic Millisecond Pulsars PSR B1821-24, PSR B1937+21, and PSR J0218+4232
Gotthelf, E. V.; Bogdanov, S.
We present Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray timing and spectroscopy of the three exceptionally energetic rotation-powered millisecond pulsars PSRs B1821-24, B1937+21, and J0218+4232. By correcting for the frequency and phase drifts of the NuSTAR onboard clock, we are able to recover the intrinsic hard X-ray pulse profiles …
A multispacecraft event study of Pc5 ultralow-frequency waves in the magnetosphere and their external drivers
Wang, Chih-Ping; Liu, Terry Z.; Angelopoulos, Vassilis +9 more
We investigate a quiet time event of magnetospheric Pc5 ultralow-frequency (ULF) waves and their likely external drivers using multiple spacecraft observations. Enhancements of electric and magnetic field perturbations in two narrow frequency bands, 1.5-2 mHz and 3.5-4 mHz, were observed over a large radial distance range from r 5 to 11 RE
Measure the Propagation of a Halo CME and Its Driven Shock with the Observations from a Single Perspective at Earth
Feng, Li; Lu, Lei; Inhester, Bernd +2 more
We present a detailed study of an Earth-directed coronal mass ejection (full-halo CME) event that happened on 2011 February 15, making use of white-light observations by three coronagraphs and radio observations by Wind/WAVES. We applied three different methods to reconstruct the propagation direction and traveling distance of the CME and its driv…
Simulation of magnetic holes formation in the magnetosheath
Raeder, Joachim; Ahmadi, Narges; Germaschewski, Kai
Magnetic holes have been frequently observed in the Earth's magnetosheath and are believed to be the consequence of the nonlinear evolution of the mirror instability. Mirror mode perturbations mainly form as magnetic holes in regions where the plasma is marginally mirror stable with respect to the linear instability criterion. We present an expand…
Suzaku spectroscopy of the neutron star transient 4U 1608-52 during its outburst decay.
Armas Padilla, M.; Muñoz-Darias, T.; Hori, T. +2 more
We test the proposed three-component spectral model for neutron star low-mass X-ray binaries using broad-band X-ray data. We have analysed four X-ray spectra (0.8-30 keV) obtained with Suzaku during the 2010 outburst of 4U 1608-52, which have allowed us to perform a comprehensive spectral study covering all the classical spectral states. We use a …
Kinematics of the galaxy from OB stars with proper motions from the Gaia DR1 catalogue
Bobylev, V. V.; Bajkova, A. T.
We consider two samples of OB stars with different distance scales that we have studied previously. The first and second samples consist of massive spectroscopic binaries with photometric distances and distances determined from interstellar calcium lines, respectively. The OB stars are located at heliocentric distances up to 7 kpc. We have identif…
A systematic search for near-infrared counterparts of nearby ultraluminous X-ray sources (II)
Harrison, F. A.; Roberts, T. P.; Torres, M. A. P. +5 more
We present the results of our continued systematic search for near-infrared (NIR) candidate counterparts to ultraluminous X-ray sources (ULXs) within 10 Mpc. We observed 42 ULXs in 24 nearby galaxies and detected NIR candidate counterparts to 15 ULXs. Fourteen of these ULXs appear to have a single candidate counterpart in our images and the remain…
Suzaku observations of the outskirts of the galaxy cluster Abell 3395, including a filament toward Abell 3391
Ohashi, Takaya; Takizawa, Motokazu; Fujita, Yutaka +4 more
The results of Suzaku observations of the outskirts of Abell 3395, including a large-scale structure filament toward Abell 3391, are presented. We measured temperature and abundance distributions from the southern outskirt of A 3395 to the north at the virial radius, where a filament structure has been found in the former X-ray and Sunyaev-Zel'dov…