Search Publications
MONOS: Multiplicity Of Northern O-type Spectroscopic systems. II. Orbit review and analysis for 35 single-lined spectroscopic binary systems and candidates
Simón-Díaz, S.; Maíz Apellániz, J.; Negueruela, I. +3 more
Context. Massive stars are a key element for understanding the chemical and dynamical evolution of galaxies. Stellar evolution is conditioned by many factors: Rotation, mass loss, and interaction with other objects are the most important ones for massive stars. During the first evolutionary stages of stars with initial masses (i.e., MZAMS
First dust measurements with the Solar Orbiter Radio and Plasma Wave instrument
Maksimovic, M.; Bale, S. D.; Chust, T. +20 more
Context. Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals (as may be expected) are routinely detected by the Time Domain Sampler (TDS) system of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter.
Aims: We in…
Kinematics and star formation toward W33: a central hub as a hub-filament system
Zhang, Chuan-Peng; Wang, Jun-Jie; Xu, Jin-Long +4 more
Aims: We investigate the gas kinematics and physical properties toward the W33 complex and its surrounding filaments. We study clump formation and star formation in a hub-filament system.
Methods: We performed a large-scale mapping observation toward the W33 complex and its surroundings, covering an area of 1.3° × 1.0°, in 12C…
Spectroscopic observations of a flare-related coronal jet
Li, D.; Zhang, Q. M.; Huang, Z. H. +3 more
Context. Coronal jets are ubiquitous in active regions and coronal holes.
Aims: In this paper, we study a coronal jet related to a C3.4 circular-ribbon flare in the active region 12434 on 2015 October 16.
Methods: The flare and jet were observed in ultraviolet and extreme ultraviolet wavelengths by the Atmospheric Imaging Assembly on boa…
Potential origin of the state-dependent high-energy tail in the black hole microquasar Cygnus X-1 as seen with INTEGRAL
Rodriguez, J.; Siegert, T.; Wilms, J. +8 more
Context. 0.1-10 MeV observations of the black hole microquasar Cygnus X-1 have shown the presence of a spectral feature in the form of a power law in addition to the standard black body (0.1-10 keV) and Comptonization (10-200 keV) components observed by INTEGRAL in several black-hole X-ray binaries. This so-called "high-energy tail" was recently s…
J-PLUS: Systematic impact of metallicity on photometric calibration with the stellar locus
Hernández-Monteagudo, C.; Hernán-Caballero, A.; Tremblay, P. -E. +19 more
Aims: We present the photometric calibration of the twelve optical passbands for the Javalambre Photometric Local Universe Survey (J-PLUS) second data release (DR2), comprising 1088 pointings of two square degrees, and study the systematic impact of metallicity on the stellar locus technique.
Methods: The [Fe/H] metallicity from the Larg…
Towards a more complete sample of binary central stars of planetary nebulae with Gaia
Rejkuba, M.; Walton, N. A.; Chornay, N. +3 more
Context. Many if not most planetary nebulae (PNe) are now thought to be the outcome of binary evolutionary scenarios. However, only a few percent of the PNe in the Milky Way are known to host binary systems. The high-precision repeated observing and long time baseline of Gaia make it well suited for detecting new close binaries through photometric…
Reconstructing solar irradiance from historical Ca II K observations. I. Method and its validation
Solanki, Sami K.; Chatzistergos, Theodosios; Ermolli, Ilaria +5 more
Context. Knowledge of solar irradiance variability is critical to Earth's climate models and understanding the solar influence on Earth's climate. Direct solar irradiance measurements have only been available since 1978. Reconstructions of past variability typically rely on sunspot data. However, sunspot records provide only indirect information o…
Multi-spacecraft observations of the structure of the sheath of an interplanetary coronal mass ejection and related energetic ion enhancement
Vainio, R.; Kilpua, E. K. J.; Lavraud, B. +18 more
Context. Sheath regions ahead of coronal mass ejections (CMEs) are large-scale heliospheric structures that form gradually with CME expansion and propagation from the Sun. Turbulent and compressed sheaths could contribute to the acceleration of charged particles in the corona and in interplanetary space, but the relation of their internal structur…
What happened before?. Disks around the precursors of young Herbig Ae/Be stars
Waters, L. B. F. M.; Dominik, C.; Valegård, P. -G.
Context. Planets form in circumstellar disks around pre-main-sequence stars. A key question is, how do the formation and evolution of protoplanetary disks depend on stellar mass? Studies of circumstellar disks at infrared and submillimeter wavelengths around intermediate-mass Herbig Ae/Be stars have revealed disk structures such as cavities, gaps,…