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Hard-X-ray-selected active galactic nuclei - I. A radio view at high frequencies
McHardy, I.; Behar, E.; Tombesi, F. +5 more
A thorough study of radio emission in active galactic nuclei (AGNs) is of fundamental importance to understand the physical mechanisms responsible for the emission and the interplay between accretion and ejection processes. High-frequency radio observations can target the nuclear contribution of smaller emitting regions and are less affected by ab…
Three-Dimensional Reconstructions of Coronal Wave Surfaces Using a New Mask-Fitting Method
Feng, Li; Lu, Lei; Gan, Weiqun +5 more
Coronal waves are large-scale disturbances often driven by coronal mass ejections (CMEs). We investigate a spectacular wave event on 7 March 2012, which is associated with an X5.4 flare (SOL2012-03-07). By using a running center-median (RCM) filtering method for the detection of temporal variations in extreme ultraviolet (EUV) images, we enhance t…
White-light Emission and Chromospheric Response by an X1.8-class Flare on 2012 October 23
Watanabe, Kyoko; Imada, Shinsuke
On 2012 October 23, a strong white-light emission, associated with an X1.8-class flare, was observed by the Solar Optical Telescope on board the Hinode satellite. White-light kernels were clearly observed along the Ca II H ribbons. RHESSI also observed hard X-ray emissions that were almost located on the white-light kernels. The total energy of th…
A high redshift population of galaxies at the North Ecliptic Pole. Unveiling the main sequence of dusty galaxies
Valtchanov, I.; White, G. J.; Małek, K. +16 more
Context. Dusty high-z galaxies are extreme objects with high star formation rates (SFRs) and luminosities. Characterising the properties of this population and analysing their evolution over cosmic time is key to understanding galaxy evolution in the early Universe.
Aims: We select a sample of high-z dusty star-forming galaxies (DSFGs) and ev…
MOSEL Survey: Tracking the Growth of Massive Galaxies at 2 < z < 4 Using Kinematics and the IllustrisTNG Simulation
Papovich, Casey; Kewley, Lisa J.; Harshan, Anishya +13 more
We use K-band spectroscopic data from the Multi-Object Spectroscopic Emission Line survey to analyze the kinematic properties of galaxies at z > 3. Our sample consists of 34 galaxies at 3.0 < zspec < 3.8 between 9.0 < $\mathrm{log}({M}_{* }/{M}_{\odot })$ < 11.0. We find that galaxies with $\mathrm{log}({M}_{* }/{M}_{\odo…
Intercycle and Intracycle Variation of Halo CME Rate Obtained from SOHO/LASCO Observations
Gopalswamy, Nat; Akiyama, Sachiko; Yashiro, Seiji +3 more
We report on the properties of halo coronal mass ejections (HCMEs) in solar cycles 23 and 24. We compare the HCME properties between the corresponding phases (rise, maximum, and declining) in cycles 23 and 24 and compare those between the whole cycles. Despite the significant decline in the sunspot number (SSN) in cycle 24, which dropped by 46% wi…
Study of Star Clusters in the M83 Galaxy with a Convolutional Neural Network
Bialopetravičius, Jonas; Narbutis, Donatas
We present a study of evolutionary and structural parameters of star cluster candidates in the spiral galaxy M83. For this we use a convolutional neural network trained on mock clusters and capable of fast identification and localization of star clusters, as well as inference of their parameters from multiband images. We use this pipeline to detec…
XMM-Newton observations of a gamma-ray pulsar J0633+0632: pulsations, cooling and large-scale emission
Zyuzin, D.; Danilenko, A.; Karpova, A. +2 more
We report results of XMM-Newton observations of a γ-ray pulsar J0633+0632 and its wind nebula. We reveal, for the first time, pulsations of the pulsar X-ray emission with a single sinusoidal pulse profile and a pulsed fraction of 23 ± 6 per cent in the 0.3-2 keV band. We confirm previous Chandra findings that the pulsar X-ray spectrum consists of …
Unraveling the Physics of Quasar Jets: Optical Polarimetry and Implications for the X-ray Emission Process
Perlman, Eric S.; Clautice, Devon; Avachat, Sayali +4 more
Since the launch of Chandra twenty years ago, one of the greatest mysteries surrounding Quasar Jets is the production mechanism for their extremely high X-ray luminosity. Two mechanisms have been proposed. In the first view, the X-ray emission is inverse-Comptonized CMB photons. This view requires a jet that is highly relativistic (bulk Lorentz fa…
Future Missions Related to the Determination of the Elemental and Isotopic Composition of Earth, Moon and the Terrestrial Planets
Sotin, Christophe; Guenther, Eike W.; Dandouras, Iannis +14 more
In this chapter, we review the contribution of space missions to the determination of the elemental and isotopic composition of Earth, Moon and the terrestrial planets, with special emphasis on currently planned and future missions. We show how these missions are going to significantly contribute to, or sometimes revolutionise, our understanding o…