9.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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29 papers · 2 filters
A model for stealth coronal mass ejections
B. J. Lynch, S. Masson, Y. Li +4
Stealth coronal mass ejections (CMEs) are events in which there are almost no observable signatures of the CME eruption in the low corona but often a well-resolved slow flux rope C…
Halpha Doppler shifts in a tornado in the solar corona
B. Schmieder, P. Mein, N. Mein +3
High resolution movies in 193 A from the Atmospheric Imaging Assembly (AIA) on the Solar Dynamic Observatory SDO show apparent rotation in the leg of a prominence observed during a…
Standing on the shoulders of Dwarfs: the Kepler asteroseismic LEGACY sample II - radii, masses, and ages
Victor Silva Aguirre, Mikkel N. Lund, H. M. Antia +21
We use asteroseismic data from the Kepler satellite to determine fundamental stellar properties of the 66 main-sequence targets observed for at least one full year by the mission.…
The evolution of hydrocarbon dust grains in the interstellar medium and its influence on the infrared spectra of dust
M. S. Murga, S. A. Khoperskov, D. S. Wiebe
We present evolutionary calculations for the size and aromatization degree distributions of interstellar dust grains, driven by their destruction by radiation, collisions with gas…
The K2 Galactic Archaeology Program Data Release 1: Asteroseismic results from Campaign 1
D. Stello, J. Zinn, Y. Elsworth +11
NASA's K2 mission is observing tens of thousands of stars along the ecliptic, providing data suitable for large scale asteroseismic analyses to inform galactic archaeology studies.…
Starspot signature on the light curve: Learning about the latitudinal distribution of spots
A. R. G. Santos, M. S. Cunha, P. P. Avelino +2
Quasi-periodic modulations of the stellar light curve may result from dark spots crossing the visible stellar disc. Due to differential rotation, spots at different latitudes gener…
Three-dimensional hydrodynamical CO5BOLD model atmospheres of red giant stars. V. Oxygen abundance in the metal-poor giant HD 122563 from OH UV lines
D. Prakapavičius, A. Kučinskas, V. Dobrovolskas +5
Although oxygen is an important tracer of the early Galactic evolution, its abundance trends with metallicity are still relatively poorly known at [Fe/H] < -2.5. This is in part du…
A LOFAR detection of the low mass young star T Tau at 149 MHz
Colm P. Coughlan, Rachael E. Ainsworth, Jochen Eislöffel +15
Radio observations of young stellar objects (YSOs) enable the study of ionised plasma outflows from young protostars via their free-free radiation. Previous studies of the low-mass…
The SpaceInn-SISMA database: characterization of a large sample of variable and active stars by means of HARPS spectra
M. Rainer, E. Poretti, A. Mistò +6
We created a large database of physical parameters and variability indicators by fully reducing and analysing the large number of spectra taken to complement the asteroseismic obse…
On the Stability of a General Magnetic Field Topology in Stellar Radiative Zones
Kyle Augustson, Stephane Mathis, Antoine Strugarek
This paper provides a brief overview of the formation of stellar fossil magnetic fields and what potential instabilities may occur given certain configurations of the magnetic fiel…
The MiMeS survey of magnetism in massive stars: Magnetic analysis of the O-type stars
J. H. Grunhut, G. A. Wade, C. Neiner +9
We present the analysis performed on spectropolarimetric data of 97 O-type targets included in the framework of the MiMeS (Magnetism in Massive Stars) Survey. Mean Least-Squares De…
The Gaia-ESO Survey: calibration strategy
E. Pancino, the Gaia-ESO Survey collaboration
The Gaia-ESO survey (GES) is now in its fifth and last year of observations, and has already produced tens of thousands of high-quality spectra of stars in all Milky Way components…
Magnetic helicity estimations in models and observations of the solar magnetic field. Part I: Finite volume methods
Gherardo Valori, Etienne Pariat, Sergey Anfinogentov +7
Magnetic helicity is a conserved quantity of ideal magneto-hydrodynamics characterized by an inverse turbulent cascade. Accordingly, it is often invoked as one of the basic physica…
Blowout Jets and Impulsive Eruptive Flare in a Bald-Patch Topology
R. Chandra, C. H. Mandrini, B. Schmieder +7
Context: A subclass of broad EUV and X-ray jets, called blowout jets, have become a topic of research since they could be the link between standard collimated jets and CMEs.} Aim:…
Analysis of the linear approximation of seismic inversions for various structural pairs
G. Buldgen, D. R. Reese, M. A. Dupret
Thanks to space-based photometry missions CoRoT and Kepler, we benefit from a wealth of seismic data for stars other than the sun. In the future, K2, Tess, and Plato will complemen…
A model for straight and helical solar jets: II. Parametric study of the plasma beta
E. Pariat, K. Dalmasse, C. R. DeVore +2
Jets are dynamic, impulsive, well-collimated plasma events that develop at many different scales and in different layers of the solar atmosphere. Jets are believed to be induced by…
The puzzling properties of the magnetic O star Tr16-22
Yael Naze, Rodolfo Barba, Stefano Bagnulo +4
(abridged version) Context : The detection of bright, hard, and variable X-ray emission in Tr16-22 prompted spectropolarimetric observations of this star, which in turn led to the…
A test field for Gaia. Radial velocity catalogue of stars in the South Ecliptic Pole
Y. Frémat, M. Altmann, E. Pancino +25
Gaia is a space mission currently measuring the five astrometric parameters as well as spectrophotometry of at least 1 billion stars to G = 20.7 mag with unprecedented precision. T…
Proper motion survey and kinematic analysis of the Rho Ophiuchi embedded cluster
C. Ducourant, R. Teixeira, A. Krone-Martins +7
We aim at performing a kinematic census of young stellar objects (YSOs) in the Rho Ophiuchi F core and partially in the E core of the L1688 dark cloud. We run a proper motion progr…
Coronal type III radio bursts and their X-ray flare and interplanetary type III counterparts
Hamish A. S. Reid, Nicole Vilmer
Type III bursts and hard X-rays are both produced by flare energetic electron beams. The link between both emissions has been investigated in many previous studies, but no statisti…
A critical reassessment of the fundamental properties of GJ 504: Chemical composition and age
Valentina D'Orazi, Silvano Desidera, Raffaele Gratton +8
The recent development of brand new observational techniques and theoretical models have greatly advanced the exoplanet research field. Despite significant achievements, which have…
Radio Diagnostics of Electron Acceleration Sites During the Eruption of a Flux Rope in the Solar Corona
Eoin P. Carley, Nicole Vilmer, Peter T. Gallagher
Electron acceleration in the solar corona is often associated with flares and the eruption of twisted magnetic structures known as flux ropes. However, the locations and mechanisms…
Resolving the planet-hosting inner regions of the LkCa 15 disk
C. Thalmann, M. Janson, A. Garufi +28
LkCa 15 hosts a pre-transitional disk as well as at least one accreting protoplanet orbiting in its gap. Previous disk observations have focused mainly on the outer disk, which is…
Asteroseismology of the Hyades with K2: first detection of main-sequence solar-like oscillations in an open cluster
Mikkel N. Lund, Sarbani Basu, Víctor Silva Aguirre +14
The Hyades open cluster was targeted during Campaign 4 (C4) of the NASA K2 mission, and short-cadence data were collected on a number of cool main-sequence stars. Here, we report r…