Elena Cukanovaite
YOU?
Author Swipe
View article: Comparison of methods used to derive the Galactic star formation history from white dwarf samples
Comparison of methods used to derive the Galactic star formation history from white dwarf samples Open
We compare three methods of deriving the local Galactic star formation history, using as a benchmark the Gaia-defined 40 pc white dwarf sample, currently the largest volume complete sample of stellar remnants with medium-resolution spectro…
View article: Comparison of methods used to derive the Galactic star formation history from white dwarf samples
Comparison of methods used to derive the Galactic star formation history from white dwarf samples Open
We compare three methods of deriving the local Galactic star formation history, using as a benchmark the Gaia-defined 40 pc white dwarf sample, currently the largest volume complete sample of stellar remnants with medium-resolution spectro…
View article: The 40 pc sample of white dwarfs from <i>Gaia</i>
The 40 pc sample of white dwarfs from <i>Gaia</i> Open
We present a comprehensive overview of a volume-complete sample of white dwarfs located within 40 pc of the Sun, a significant proportion of which were detected in Gaia Data Release 3 (DR3). Our DR3 sample contains 1076 spectroscopically c…
View article: Local stellar formation history from the 40 pc white dwarf sample
Local stellar formation history from the 40 pc white dwarf sample Open
We derive the local stellar formation history from the Gaia-defined 40 pc white dwarf sample. This is currently the largest volume-complete sample of white dwarfs for which spectroscopy is available, allowing for classification of the chem…
View article: A catalogue of white dwarfs in <i>Gaia</i> EDR3
A catalogue of white dwarfs in <i>Gaia</i> EDR3 Open
We present a catalogue of white dwarf candidates selected from Gaia Early Data Release 3 (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia quality flags to remove objects with unreliable measurements whi…
View article: Horizontal spreading of planetary debris accreted by white dwarfs
Horizontal spreading of planetary debris accreted by white dwarfs Open
White dwarfs with metal-polluted atmospheres have been studied widely in the context of the accretion of rocky debris from evolved planetary systems. One open question is the geometry of accretion and how material arrives and mixes in the …
View article: 3D spectroscopic analysis of helium-line white dwarfs
3D spectroscopic analysis of helium-line white dwarfs Open
In this paper, we present corrections to the spectroscopic parameters of DB and DBA white dwarfs with −10.0 ≤ log (H/He) ≤ −2.0, 7.5 ≤ log g ≤ 9.0, and $12\, 000$ ≲ Teff $\lesssim 34\, 000\,\mathrm{ K}$, based on 282 3D atmospheric models …
View article: 3D atmospheric models of helium-dominated atmosphere white dwarfs
3D atmospheric models of helium-dominated atmosphere white dwarfs Open
All stars below around 10M will eventually become white dwarfs, making them the most common type of stellar remnant. Due to the large densities of white dwarfs, their atmospheres are dominated by the lightest element present, with around 8…
View article: Doppler beaming factors for white dwarfs, main sequence stars, and giant stars
Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Open
Context. Systematic theoretical calculations of Doppler beaming factors are scarce in the literature, particularly in the case of white dwarfs. Additionally, there are no specific calculations for the limb-darkening coefficients of 3D whit…
View article: Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Limb-darkening coefficients for 3D (DA and DB) white dwarf models
Doppler beaming factors for white dwarfs, main sequence stars, and giant stars Limb-darkening coefficients for 3D (DA and DB) white dwarf models Open
We computed Doppler beaming factors for DA, DB, and DBA white dwarf models, as well as for main sequence and giant stars covering the transmission curves of the Sloan, UBVRI, HiPERCAM, Kepler, TESS, and Gaia photometric systems. The calcul…
View article: <i>Gaia</i> white dwarfs within 40 pc – I. Spectroscopic observations of new candidates
<i>Gaia</i> white dwarfs within 40 pc – I. Spectroscopic observations of new candidates Open
We present a spectroscopic survey of 230 white dwarf candidates within 40 pc of the Sun from the William Herschel Telescope and Gran Telescopio Canarias. All candidates were selected from Gaia Data Release 2 (DR2) and in almost all cases, …
View article: A Volume-limited Sample of Cataclysmic Variables from Gaia DR2: Space Density and Population Properties
A Volume-limited Sample of Cataclysmic Variables from Gaia DR2: Space Density and Population Properties Open
We present the first volume-limited sample of cataclysmic variables (CVs), selected using the accurate parallaxes provided by the second data release (DR2) of the European Space Agency Gaia space mission. The sample is composed of 42 CVs w…
View article: From hydrogen to helium: the spectral evolution of white dwarfs as evidence for convective mixing
From hydrogen to helium: the spectral evolution of white dwarfs as evidence for convective mixing Open
We present a study of the hypothesis that white dwarfs undergo a spectral change from hydrogen- to helium-dominated atmospheres using a volume-limited photometric sample drawn from the Gaia-DR2 catalogue, the Sloan Digital Sky Survey (SDSS…
View article: Calibration of the mixing-length theory for structures of helium-dominated atmosphere white dwarfs
Calibration of the mixing-length theory for structures of helium-dominated atmosphere white dwarfs Open
We perform a calibration of the mixing-length parameter at the bottom boundary of the convection zone for helium-dominated atmospheres of white dwarfs. This calibration is based on a grid of 3D DB (pure-helium) and DBA (helium-dominated wi…
View article: The Space Density of Cataclysmic Variables from $\mathit{Gaia}$ DR2
The Space Density of Cataclysmic Variables from $\mathit{Gaia}$ DR2 Open
We present the first volume-limited sample of cataclysmic variables (CVs), selected using the accurate parallaxes provided by the second data release (DR2) of the ESA $\mathit{Gaia}$ space mission. The sample is composed of 42 CVs within 1…
View article: Phase-resolved spectroscopy of Gaia14aae: line emission from near the white dwarf surface
Phase-resolved spectroscopy of Gaia14aae: line emission from near the white dwarf surface Open
AM CVn binaries are a class of ultracompact, hydrogen-deficient binaries,\neach consisting of a white dwarf accreting helium-dominated material from a\ndegenerate or semi-degenerate donor star. Of the 56 known systems, only\nGaia14aae unde…
View article: Fundamental parameter accuracy of DA and DB white dwarfs in<i>Gaia</i>Data Release 2
Fundamental parameter accuracy of DA and DB white dwarfs in<i>Gaia</i>Data Release 2 Open
We report on a comparison of spectroscopic analyses for hydrogen (DA) and helium atmosphere (DB) white dwarfs with Gaia Data Release 2 (DR2) parallaxes and photometry. We assume a reddening law and a mass–radius relation to connect the eff…
View article: A<i>Gaia</i>Data Release 2 catalogue of white dwarfs and a comparison with SDSS
A<i>Gaia</i>Data Release 2 catalogue of white dwarfs and a comparison with SDSS Open
We present a catalogue of white dwarf candidates selected from the second data release of Gaia (DR2). We used a sample of spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey (SDSS) to map the entire space spanned by …
View article: Pure-helium 3D model atmospheres of white dwarfs
Pure-helium 3D model atmospheres of white dwarfs Open
We present the first grid of 3D simulations for the pure-helium atmospheres of DB white dwarfs. The simulations were computed with the CO5BOLD radiation-hydrodynamics code and cover effective temperatures and surface gravities between 12 0…