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Type III Radio Bursts Observations on 20th August 2017 and 9th September 2017 with LOFAR Bałdy Telescope
Zucca, Pietro; Vocks, Christian; Mann, Gottfried +7 more
[C II] and CO Emission along the Bar and Counter-arms of NGC 7479
Laine, Seppo; Fadda, Dario; Appleton, Philip N.
We present new SOFIA [C II] and ALMA COJ=1→0 observations of the nearby asymmetric barred spiral galaxy NGC 7479. The data, which cover the whole bar of the galaxy and the counter-arms visible in the radio continuum, are analyzed in conjunction with a wealth of existing visible, infrared, radio, and X-ray data. As in most normal galaxie…
The warm-up phase in massive star-forming cores around RCW 120
Wiebe, D. S.; Kirsanova, M. S.; Salii, S. V. +3 more
We study molecular emission in a massive condensation at the border of the H II region RCW 120, paying particular attention to the Core 1 and 2 objects, the most massive fragments of the condensation found previously by ALMA. The latter fragment was previously suggested to host a high-mass analogue of Class 0 young stellar object. We present spect…
Active galactic nuclei catalog from the AKARI NEP-Wide field
Goto, Tomotsugu; Kim, Seong Jin; Ho, Simon C. -C. +12 more
Context. The north ecliptic pole (NEP) field provides a unique set of panchromatic data that are well suited for active galactic nuclei (AGN) studies. The selection of AGN candidates is often based on mid-infrared (MIR) measurements. Such methods, despite their effectiveness, strongly reduce the breadth of resulting catalogs due to the MIR detecti…
Strongly pulsed thermal X-rays from a single extended hot spot on PSR J2021+4026
Mereghetti, Sandro; Turolla, Roberto; Rigoselli, Michela +2 more
The radio-quiet pulsar PSR J2021+4026 is mostly known because it is the only rotation-powered pulsar that shows variability in its γ-ray emission. Using XMM-Newton archival data, we first confirmed that its flux is steady in the X-ray band, and then we showed that both the spectral and timing X-ray properties, that is to say the narrow pulse profi…
Observations of Closed Magnetic Flux Embedded in the Lobes During Periods of Northward IMF
Fear, R. C.; Coxon, J. C.; Fryer, L. J. +1 more
The high latitude, lobe regions of the magnetosphere are often assumed to contain cool, low energy plasma populations. However, during periods of northward Interplanetary Magnetic Field, energetic plasma populations have occasionally been observed. We present three cases when Cluster observed uncharacteristically "hot" plasma populations in the lo…
Magnetic Reconnection in the Near-Earth Magnetotail
Nagai, Tsugunobu
Non-equilibrium in the solar neighbourhood using dynamical modelling with Gaia DR2
Kipper, Rain; Tenjes, Peeter; Tempel, Elmo +1 more
Matter distribution models of the Milky Way galaxy are usually stationary, although there are known to be wave-like perturbations in the disc at ~10 per cent level of the total density. Modelling of the overall acceleration field by allowing non-equilibrium is a complicated task. We must learn to distinguish whether density enhancements are persis…
Rapid CO gas dispersal from NO Lup's class III circumstellar disc
Testi, L.; Tazzari, M.; Williams, J. P. +9 more
We observed the K7 class III star NO Lup in an ALMA survey of the 1-3 Myr Lupus association and detected circumstellar dust and CO gas. Here we show that the J = 3-2 CO emission is both spectrally and spatially resolved, with a broad velocity width ~19 km s-1 for its resolved size ~1 arcsec (~130 au). We model the gas emission as a Kepl…
BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav
Davoudi, Fatemeh; Poro, Atila; Blackford, Mark G. +7 more
A new ephemeris, period change analysis and light curve modeling of the W UMa-type eclipsing binary BF Pav are presented in this study. Light curves of the system taken in BVRI filters from two observatories, in Australia and Argentina, were modeled using the Wilson-Devinney code. The results of this analysis demonstrate that BF Pav is a contact b…