Search Publications
VarIabiLity seLection of AstrophysIcal sources iN PTF (VILLAIN). I. Structure function fits to 71 million objects
Hjorth, J.; Bruun, S. H.; Agnello, A.
Context. Light-curve variability is well-suited to characterising objects in surveys with high cadence and a long baseline. This is especially relevant in view of the large datasets to be produced by the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST).
Aims: We aim to determine variability parameters for objects in the Paloma…
First detailed study of two eccentric eclipsing binaries: TYC 5378-1590-1 and TYC 8378-252-1
Zasche, P.; Marang, F.; Erdem, A. +2 more
Aims: The analysis of combined photometry and spectroscopy of eccentric eclipsing binary systems facilitates the derivation of very precise values for a large ensemble of physical parameters of the component stars and their orbits, thereby providing stringent tests of theories of stellar structure and evolution. In this paper two eccentric ec…
GD 99: Re-investigation of an old ZZ Ceti companion
Sódor, Á.; Bognár, Zs.; Mező, Gy.
Context. Thanks to photometric space missions, we have access to more and more information on the properties of white dwarf stars, especially pulsating ones. In the case of pulsators, we have the opportunity to get an insight into their otherwise hidden interiors by the means of asteroseismology. In addition to space-based observations, we also ta…
Solar-like oscillations in γ Cephei A as seen through SONG and TESS. A seismic study of γ Cephei A
Grundahl, F.; Knudstrup, E.; Lund, M. N. +11 more
Context. Fundamental stellar parameters such as mass and radius are some of the most important building blocks in astronomy, both when it comes to understanding the star itself and when deriving the properties of any exoplanet(s) they may host. Asteroseismology of solar-like oscillations allows us to determine these parameters with high precision.…
Interaction of a high-mass X-ray binary with the interstellar medium through stellar wind. The case of GX 301-2
Chaty, S.; Marchioro, J.; Coleiro, A. +2 more
Context. GX 301-2 is a high-mass X-ray binary (HMXB) with strong stellar outflows. The evolution of these binaries can be closely related with the interstellar environment due to strong wind interactions.
Aims: We try to constrain the energy injected in the interstellar medium by GX 301-2 through stellar wind using HAWK-I and Herschel data. <…
Frequency analysis of the hybrid δ Sct-γ Dor star CoRoT-102314644
Creevey, O. L.; Pichon, B.; Sánchez Arias, J. P. +1 more
Context. Observations from space missions allowed significant progress due to the absence of atmospheric noise contributions and having uninterrupted data sets. This has been extremely beneficial in asteroseismology because many oscillation frequencies, not observable from the ground, can be detected. One example of this success is the large numbe…
Blending from binarity in microlensing searches toward the Large Magellanic Cloud
Moniez, M.; Blaineau, T.
Context. Studies of gravitational microlensing effects require the estimation of their detection efficiency as soon as one wants to quantify the massive compact objects along the line of sight of source targets. This is particularly important for setting limits on the contribution of massive compact objects to the Galactic halo. These estimates of…
Reconstruction of total solar irradiance variability as simultaneously apparent from Solar Orbiter and Solar Dynamics Observatory
Schmidt, W.; Woch, J.; Solanki, S. K. +42 more
Solar irradiance variability has been monitored almost exclusively from the Earth's perspective. We present a method to combine the unprecedented observations of the photospheric magnetic field and continuum intensity from outside the Sun-Earth line, which is being recorded by the Polarimetric and Helioseismic Imager on board the Solar Orbiter mis…
HCS background magnetic field study HYTARO+
Hidalgo, M. A.; Blanco, J. J.; Arrazola, D.
Context. HYTARO+ is an analytical model developed to evaluate the influence of the solar magnetic dipole in the topology of the local structure of the heliospheric current sheet (HCS).
Aims: Statistical methods such as MVA, which are typically used in the study of the HCS come with two limitations. On one hand, they do not provide any informa…
New constraints on the presence of debris disks around G 196-3 B and VHS J125601.92-125723.9 b
Zakhozhay, Olga V.; Rebolo, Rafael; Semenov, Dmitry A. +10 more
Context. The existence of warm (protoplanetary) disks around very young isolated planetary and brown dwarf mass objects is known based on near- and mid-infrared flux excesses and millimeter observations. These disks may later evolve into debris disks or rings, although none have been observed or confirmed so far. Little is known about circum(sub)s…