Search Publications
Role of Compressive Viscosity and Thermal Conductivity on the Damping of Slow Waves in Coronal Loops with and Without Heating-Cooling Imbalance
Srivastava, A. K.; Wang, T. J.; Prasad, Abhinav
In the present article, we derive a new dispersion relation for slow magnetoacoustic waves invoking the effect of thermal conductivity, compressive viscosity, radiation, and an unknown heating term along with the consideration of heating-cooling imbalance from linearized MHD equations. We solve the general dispersion relation to understand the rol…
Evolved massive stars at low-metallicity. III. A source catalog for the Large Magellanic Cloud
Yang, Ming; Bonanos, Alceste Z.; Gao, Jian +9 more
We present a clean, magnitude-limited (IRAC1 or WISE1 ≤ 15.0 mag) multiwavelength source catalog for the Large Magellanic Cloud (LMC). The catalog was built by crossmatching (1″) and deblending (3″) between the source list of Spitzer Enhanced Imaging Products and Gaia Data Release 2, with strict constraints on the Gaia astrometric solution in orde…
Faint LAEs near z > 4.7 C IV absorbers revealed by MUSE
Salvadori, S.; Ouchi, M.; Vanzella, E. +5 more
We present the results from the search for Lyman alpha emitters (LAEs) in the proximity of 11 C IV absorption systems at z > 4.7 in the spectrum of the QSO J1030+0524, using data from Multi-Unit Spectroscopic Explorer. We have found multiple LAE candidates close to four C IV systems at $z_{{\rm{C {\small IV}}}}=4.94$ -5.74 with $\log _{10}(N_{{…
Global and local processes of thin current sheet formation during substorm growth phase
Artemyev, A. V.; Runov, A.; Angelopoulos, V. +4 more
Formation of thin current sheets in Earth's magnetotail is a critical element of the magnetosphere dynamics. The configuration and stability of these thin current sheets control the onset of magnetic reconnection and particle acceleration in the magnetotail during substorms and other geomagnetic activities. In recent years, multipoint observations…
Completeness of the Gaia-verse - IV. The astrometry spread function of Gaia DR2
Everall, Andrew; Boubert, Douglas; Koposov, Sergey E. +2 more
Gaia Data Release 2 (DR2) published positions, parallaxes, and proper motions for an unprecedented 1331 909 727 sources, revolutionizing the field of Galactic dynamics. We complement this data with the astrometry spread function (ASF), the expected uncertainty in the measured positions, proper motions, and parallax for a non-accelerating point sou…
X-ray binary accretion states in active galactic nuclei? Sensing the accretion disc of supermassive black holes with mid-infrared nebular lines
Fernández-Ontiveros, Juan A.; Muñoz-Darias, Teo
Accretion states, which are universally observed in stellar mass black holes in X-ray binaries, might be expected in active galactic nuclei (AGN). This is the case at low luminosities, when the jet-corona coupling dominates the energy output in both populations. Previous attempts to extend this framework to a wider AGN population have been extreme…
The impact of ionized outflows from z 2.5 quasars is not through instantaneous in situ quenching: the evidence from ALMA and VLT/SINFONI
Alexander, D. M.; Mullaney, J.; Mainieri, V. +7 more
We present high-resolution (~2.4 kpc) ALMA band 7 observations (rest-frame λ ~ 250 $\mu$m) of three powerful z ~ 2.5 quasars (Lbol = 1047.3-1047.5 erg s-1). These targets have previously been reported as showing evidence for suppressed star formation based on cavities in the narrow H α emission at the lo…
Visual Explanation of a Deep Learning Solar Flare Forecast Model and Its Relationship to Physical Parameters
Moon, Yong-Jae; Lim, Daye; Lee, Harim +2 more
In this study, we present a visual explanation of a deep learning solar flare forecast model and its relationship to physical parameters of solar active regions (ARs). For this, we use full-disk magnetograms at 00:00 UT from the Solar and Heliospheric Observatory/Michelson Doppler Imager and the Solar Dynamics Observatory/Helioseismic and Magnetic…
2D kinematics of massive stars near the Galactic Centre
Anderson, Jay; Bedin, Luigi R.; Sabbi, Elena +12 more
The presence of massive stars (MSs) in the region close to the Galactic Centre (GC) poses several questions about their origin. The harsh environment of the GC favours specific formation scenarios, each of which should imprint characteristic kinematic features on the MSs. We present a 2D kinematic analysis of MSs in a GC region surrounding Sgr A* …
Evidence for a Cosmic-Ray Gradient in the IM Lup Protoplanetary Disk
Seifert, Richard A.; Cleeves, L. Ilsedore; Adams, Fred C. +1 more
Protoplanetary disk evolution is strongly impacted by ionization from the central star and local environment, which collectively have been shown to drive chemical complexity and are expected to impact the transport of disk material. Nonetheless, ionization remains a poorly constrained input to many detailed modeling efforts. We use new and archiva…