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Properties of LBGs with [OIII] detection at z ∼ 3.5. The importance of including nebular emission data in SED fitting
Burgarella, Denis; Boquien, Médéric; Yuan, Fang-Ting +3 more
Context. Nebular emission lines are critical to measure physical properties in the ionized gas (e.g., metallicity, the star formation rate, or dust attenuation). They also account for a significant fraction of broadband fluxes, in particular at the highest redshifts, and therefore can strongly affect the determination of other physical properties,…
Exploring the damping of Alfvén waves along a long off-limb coronal loop, up to 1.4 R⊙
Mason, H. E.; Del Zanna, G.; Gupta, G. R.
The Alfvén wave energy flux in the corona can be explored using the electron density and velocity amplitude of the waves. The velocity amplitude of Alfvén waves can be obtained from the non-thermal velocity of spectral line profiles. Previous calculations of the Alfvén wave energy flux with height in active regions and polar coronal holes have pro…
Two years with comet 67P/Churyumov-Gerasimenko: H2O, CO2, and CO as seen by the ROSINA/RTOF instrument of Rosetta
Lasue, J.; Wurz, P.; Altwegg, K. +18 more
Context. The ESA Rosetta mission investigated the environment of comet 67P/Churyumov-Gerasimenko (hereafter 67P) from August 2014 to September 2016. One of the experiments on board the spacecraft, the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) included a COmet Pressure Sensor (COPS) and two mass spectrometers to analyze the…
Elemental composition in quiescent prominences
Vial, J. -C.; Parenti, S.; Del Zanna, G.
Context. The first ionization potential (FIP) bias is currently used to trace the propagation of solar features ejected by the wind and solar eruptions (coronal mass ejections). The FIP bias also helps us to understand the formation of prominences, as it is a tracer for the solar origin of prominence plasma.
Aims: This work aims to provide el…
Extra-tidal structures around the Gaia Sausage candidate globular cluster NGC 6779 (M56)
Carballo-Bello, Julio A.; Piatti, Andrés E.
We present results on the stellar density radial profile of the outer regions of NGC 6779, a Milky Way globular cluster recently proposed as a candidate member of the Gaia Sausage structure, a merger remnant of a massive dwarf galaxy with the Milky Way. Taking advantage of the Pan-STARRS PS1 public astrometric and photometric catalogue, we built t…
The 50-100 pc scale parent stellar populations of Type II supernovae and limitations of single star evolution models
Galbany, L.; Anderson, J.; Schady, P. +4 more
There is observational evidence of a dearth in core-collapse supernova (ccSN) explosions from stars with zero-age main-sequence (ZAMS) mass M0 ≈ 17-30M⊙, referred to as the `red supergiant problem'. However, simulations now predict that above 20 M⊙ we should indeed only expect stars within certain pockets of M…
Flow Structure in the Eclipsing Polar V808 Aur. Results of 3D Numerical Simulations
Bisikalo, D. V.; Zhilkin, A. G.; Gabdeev, M. M. +1 more
The structure of the flows in the eclipsing polar V808 Aur is studied. Comparison of computations with observed light curves is used to identify and clarify a number of features in the system, such as the drift of the hot spot—the place where the stream from the inner Lagrange point approaches the surface of the white dwarf, changes in the brightn…
Spectroscopic binaries RV Tauri and DF Cygni
Bowman, Dominic M.; Manick, Rajeev; Van Winckel, Hans +7 more
Context. Some RV Tauri stars show a long-term photometric variability in their mean magnitudes. DF Cygni (DF Cyg), the only RV Tauri star in the original Kepler field, and the prototype RV Tauri (RV Tau) are two such stars.
Aims: The focus of this paper is on two famous but still poorly understood RV Tauri stars: RV Tau and DF Cyg. We aim to …
Studies of irregular satellites: I. Lightcurves and rotation periods of 25 Saturnian moons from Cassini observations
Mottola, Stefano; Denk, Tilmann
Disk-integrated time-resolved photometric observations have been performed for 25 irregular moons of Saturn with the ISS camera of the Cassini spacecraft in a wide range of solar phase angles. From the derived lightcurves, synodic rotation periods were determined, ranging from 5.5 h to 76 h; the fastest observed spin rate is much slower than the d…
The Gaia-ESO Survey: The inner disc, intermediate-age open cluster Pismis 18
Hatzidimitriou, D.; Gilmore, G.; Bayo, A. +34 more
Context. Pismis 18 is a moderately populated, intermediate-age open cluster located within the solar circle at a Galactocentric distance of about seven kpc. Few open clusters have been studied in detail in the inner disc region before the Gaia-ESO Survey.
Aims: New data from the Gaia-ESO Survey allowed us to conduct an extended radial velocit…