Search Publications
Missions
Journals
Publication Years
KELT-17: a chemically peculiar Am star and a hot-Jupiter planet
González, J. F.; Jofré, E.; Jaque Arancibia, M. +6 more
Context. There is very little information to be found in the literature regarding the detection of planets orbiting chemically peculiar stars.
Aims: Our aim is to determine the detailed chemical composition of the remarkable planet host star KELT-17. This object hosts a hot-Jupiter planet with 1.31 MJup detected by transits, and it…
Study of the departures from LTE in the unevolved stars infrared spectra
Bonifacio, P.; Caffau, E.; Oliva, E. +2 more
We present a study of departures from Local Thermodynamic Equilibrium (LTE) in the formation of infrared (IR) lines of Na I, Mg I, Al I, S I, K I, and Sr II in unevolved stars of spectral types F, G, K and metallicities around the solar metallicity. The purpose of this investigation is to identify lines of these species that can be safely treated …
Electron Acceleration in a Magnetotail Reconnection Outflow Region Using Magnetospheric MultiScale Data
Khotyaintsev, Yuri V.; Graham, Daniel B.; Vaivads, Andris +3 more
We study Magnetospheric MultiScale observations in the outflow region of magnetotail reconnection. We estimate the power density converted via the three fundamental electron acceleration mechanisms: Fermi, betatron, and parallel electric fields. The dominant mechanism, both on average and the peak values, is Fermi acceleration with a peak power de…
Neglected X-ray discovered polars. II. The peculiar eclipsing binary HY Eridani
Burwitz, V.; Beuermann, K.; Schwope, A. +2 more
We report on the X-ray observations of the eclipsing polar HY Eri (RX J0501-0359), along with its photometric, spectrophotometric, and spectropolarimetric optical variations, collected over 30 years. With an orbital period of 2.855 h,
Determination of the orbits of 62 moons of asteroids based on astrometric observations.
Emelyanov, N. V.; Drozdov, A. E.
Based on all published astrometric observations, we have determined the moon orbits for asteroids using a model of the fixed Keplerian orbit. We applied 5-114 observations for each moon. As a result, we have determined the orbits of 62 moons. All results, including the orbital parameters obtained, are presented in the tables that are provided as s…
The GBT Diffuse Ionized Gas Survey: Tracing the Diffuse Ionized Gas around the Giant Hii Region W43
Liu, Bin; Anderson, L. D.; Bania, T. M. +4 more
The Green Bank Telescope Diffuse Ionized Gas Survey (GDIGS) is a fully sampled radio recombination line (RRL) survey of the inner Galaxy at C-band (4-8 GHz). We average together ∼15 Hnα RRLs within the receiver bandpass to improve the spectral signal-to-noise ratio. The average beam size for the RRL observations at these frequencies is ∼2'. We gri…
APEX CO observations towards the photodissociation region of RCW 120
Zavagno, A.; Russeil, D.; Schuller, F. +3 more
Context. The edges of ionized (H II) regions are important sites for the formation of (high-mass) stars. Indeed, at least 30% of the Galactic high-mass-star formation is observed there. The radiative and compressive impact of the H II region could induce star formation at the border following different mechanisms such as the collect and collapse o…
Detection of a possible multiphase ultra-fast outflow in IRAS 13349+2438 with NuSTAR and XMM-Newton
Schartel, N.; Santos-Lleó, M.; Fabian, A. C. +6 more
We present joint NuSTAR and XMM-Newton observations of the bright, variable quasar IRAS 13349+2438. This combined data set shows two clear iron absorption lines at 8 and 9 keV, which are most likely associated with two layers of mildly relativistic blueshifted absorption, with velocities of ∼0.14c and ∼0.27c. We also find strong evidence for a ser…
Parametric Dependence of the Formation of Electron Butterfly Pitch Angle Distribution Driven by Magnetosonic Waves
Fu, Song; Ni, Binbin; Gu, Xudong +10 more
Using the full relativistic test particle (TP) simulation code, we investigate the parametric dependence of electron scattering and phase space density evolution driven by magnetosonic (MS) waves at L = 4.5 both inside and outside the plasmapause. The scattering effects caused by Landau resonance, bounce resonance, and the transit-time effect are …
Multiwavelength investigation of extended green object G19.88-0.53: revealing a protocluster
Tej, Anandmayee; Liu, Tie; Ishwara Chandra, C. H. +5 more
A multiwavelength analysis of star formation associated with the extended green object, G19.88-0.53 is presented in this paper. With multiple detected radio and millimetre components, G19.88-0.53 unveils as harbouring a protocluster rather than a single massive young stellar object. We detect an ionized thermal jet using the upgraded Giant Meterwa…