Search Publications
Disentangling the two sub-populations of early Herbig Be stars using VLT/X-shooter spectra
Arun, R.; Manoj, P.; Maheswar, G. +5 more
Context. Early Herbig Be (HBe) stars are massive, young stars accreting through the boundary layer mechanism. However, given the rapid (<2 Myr) evolution of early Herbig stars to the main-sequence phase, studying the evolution of the circumstellar medium around these stars can be a cumbersome exercise.
Aims: In this work, we study the samp…
Chemical characterisation of the X-shooter Spectral Library (XSL): [Mg/Fe] and [Ca/Fe] abundances
Palicio, P. A.; Vazdekis, A.; Sánchez-Blázquez, P. +1 more
Context. The X-shooter Spectral Library (XSL) is a large empirical stellar library used as a benchmark for the development of stellar population models. The inclusion of α-element abundances is crucial to disentangling the chemical evolution of any stellar system.
Aims: The aim of this paper is to provide a catalogue of high-precision, accura…
An improved spectral extraction method for JWST/NIRSpec fixed slit observations
Thiébaut, E.; Langlois, M.; Ferruit, P. +4 more
The James Webb Space Telescope is performing beyond our expectations. Its Near Infrared Spectrograph (NIRSpec) provides versatile spectroscopic capabilities in the 0.6-5.3 µm wavelength range, where a new window is opening for studying Trans-Neptunian objects in particular. We propose a spectral extraction method for NIRSpec fixed slit observation…
Influence of the interstellar magnetic field and 11-year cycle of solar activity on the heliopause nose location
Bladek, Piotr; Ratkiewicz, Romana
Context. The heliosphere is formed by the interaction between the solar wind (SW) plasma emanating from the Sun and a magnetised component of local interstellar medium (LISM) inflowing on the Sun. A separation surface called the heliopause (HP) forms between the SW and the LISM.
Aims: In this article, we define the nose of the HP and investig…
StarHorse results for spectroscopic surveys with Gaia EDR3: Chrono-chemical populations in the solar vicinity, the genuine thick disk, and young alpha-rich stars (Corrigendum)
Valentini, M.; Anders, F.; Chiappini, C. +16 more
The revised catalog is only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/676/C6
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. <…