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74 results for “white dwarfs”
The C-flame Quenching by Convective Boundary Mixing in Super-AGB Stars and the Formation of Hybrid C/O/Ne White Dwarfs and SN Progenitors
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/#abs/2013ApJ...772...37D/abstract">Denissenkov et al. (2013)</a>. MESA version 4631.</p> <p>Publication DOI: <a href="https://doi.org/10.1088/0004-637X/772/1/37">10.1088/0004-637X/772/1/37</a></p>
Polluting white dwarfs with perturbed exo-comets
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/#abs/2017MNRAS.469.2750C/abstract">Caiazzo et al. (2017)</a>. MESA version 5456.</p> <p>Publication DOI: <a href="https://doi.org/10.1093/mnras/stx1036">10.1093/mnras/stx1036</a></p>
Effective temperatures of cataclysmic-variable white dwarfs as a probe of their evolution
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2017MNRAS.466.2855P">Effective temperatures of cataclysmic-variable white dwarfs as a probe of their evolution</a></p>
Tidal dissipation and evolution of white dwarfs around massive black holes: an eccentric path to tidal disruption
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2017MNRAS.468.2296V">Tidal dissipation and evolution of white dwarfs around massive black holes: an eccentric path to tidal disruption</a></p>
Novel modelling of ultracompact X-ray binary evolution - stable mass transfer from white dwarfs to neutron stars
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/#abs/2017MNRAS.470L...6S/abstract">Novel modelling of ultracompact X-ray binary evolution - stable mass transfer from white dwarfs to neutron stars</a></p>
New full evolutionary sequences of H- and He-atmosphere massive white dwarf stars using MESA
<p>MESA inlists associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2018MNRAS.480.1547L">New full evolutionary sequences of H- and He-atmosphere massive white dwarf stars using MESA</a></p>
Carbon Shell or Core Ignitions in White Dwarfs Accreting from Helium Stars
<p>MESA inlists and run_star_extras associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2016ApJ...821...28B">Brooks et al. (2016)</a>. MESA version 7624.</p> <p>Publication DOI: <a href="https://doi.org/10.3847/0004-637X/821/1/28">10.3847/0004-637X/821/1/28</a></p>
Fast and Luminous Transients from the Explosions of Long-lived Massive White Dwarf Merger Remnants
<p>MESA inlists and run_star_extras associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2017ApJ...850..127B">Brooks et al. (2017)</a>. MESA version 9793.</p> <p>Publication DOI: <a href="https://doi.org/10.3847/1538-4357/aa9568">10.3847/1538-4357/aa9568</a></p>
Properties of Carbon-Oxygen White Dwarfs From Monte Carlo Stellar Models
<p>MESA inlists and models associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2016ApJ...823...46F">Fields et al. (2016)</a>. MESA version 7624.</p> <p>Publication DOI: <a href="https://doi.org/10.3847/0004-637X/823/1/46">10.3847/0004-637X/823/1/46</a></p>
PTF1 J082340.04+081936.5: A Hot Subdwarf B Star with a Low-mass White Dwarf Companion in an 87-minute Orbit
<p>MESA inlists and run_star_extras associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2017ApJ...835..131K">Kupfer et al. (2017)</a>. MESA version 8118.</p> <p>Publication DOI: <a href="https://doi.org/10.3847/1538-4357/835/2/131">10.3847/1538-4357/835/2/131</a></p>
Accretion-induced Collapse from Helium Star + White Dwarf Binaries
<p>MESA inlists and run_star_extras associated with <a href="https://ui.adsabs.harvard.edu/?#abs/2017ApJ...843..151B">Brooks et al. (2017)</a>. MESA version 7624.</p> <p>Publication DOI: <a href="https://doi.org/10.3847/1538-4357/aa79a6">10.3847/1538-4357/aa79a6</a></p>
Model Fit Figures for: The 100 pc White Dwarf Sample in the SDSS Footprint II. A New Look at the Spectral Evolution of White Dwarfs
<p>Figures for the model atmosphere fits to the spectroscopically confirmed white dwarfs in the 100 pc sample and the SDSS footprint (<span>arXiv:2412.04611). </span></p>
Blue large-amplitude pulsators formed from the merger of low-mass white dwarfs
<p>Here you will find the files necessary to reproduce the simulations from our work using the MESA (version 23.05.01), GYRE (version 6.0.1), and COSMIC (version 3.4.10) codes.</p>
Multidimensional Parameter Study of Double Detonation Type Ia Supernovae Originating from Thin Helium Shell White Dwarfs
<p>This dataset provides the end-state ejecta data for each of the simulations from Boos et al. 2021, along with condensed versions for use in radiative transfer calculations.</p>
Data release for "Identifying LISA verification binaries among the Galactic population of double white dwarfs"
<p>Posterior samples and SNR calculations associated with <em>Identifying LISA verification binaries among the Galactic population of double white dwarfs</em> (<a href="https://arxiv.org/abs/2210.10812">arxiv:2210.10812</a>, <a href="https://doi.org/10.1093/mnras/stad1288">MNRAS, 522, 5358 (2023)</a>).</p> <p>The <code>data</code> folder contains the following:</p> <ul> <li><code>vb_table</code>: Verification binary (VB) candidate properties obtained from electromagnetic (EM) observations. This data was compiled by Kupfer et al. and is available at <a href="https://gitlab.in2p3.fr/LISA/lisa-verification-binaries">https://gitlab.in2p3.fr/LISA/lisa-verification-binaries</a> (accessed on 2022 September 2). Used in Table 1.</li> <li><code>snr</code>: SNR calculations for each VB candidate as a function of mission duration. Used in Figure 2.</li> <li><code>basic</code>: Gravitational-wave (GW) parameter estimation study of each VB candidate. Used in Table 2 and Figure 3.</li> <li><code>detection_time</code>: VB SNR calculations with source property (and LISA launch time) uncertainty taken into account. Used in Figure 1 and Figure 4.</li> <li><code>em_priors</code>: GW parameter estimation study with EM information included in the priors. Used in Figure 5.</li> <li><code>unknown_noise</code>: GW parameter estimation study with the inclusion of noise parameters to vary the PSD. Used in Figure 6.</li> <li><code>filtered_populations</code>: Source properties of DWDs nearby in frequency to each VB candidate. See the <code>confused_sources.ipynb</code> notebook. Used in Figure 7.</li> <li><code>confusion_snr</code>: SNR calculations of the above confusion sources. Used in Figure 7.</li> <li><code>confusion</code>: A analysis of V803Cen with a realistic Galactic population of DWDs included in the data. Used in Figure 8.</li> </ul> <p>Code to reproduce every figure from the paper is available in <code>plots</code>.</p> <p>Supplementary notebooks associated with the generation of a realistic data instance (i.e. including a simulated Galactic population of DWDs nearby in frequency to V803Cen) can be found in <code>notebooks</code>.</p>
White Dwarfs Revealed in Gaia's Candidate Compact Object Binaries
<p>Discovery and characterisation of black holes (BHs), neutron stars (NSs), and white dwarfs (WDs) with detached luminous companions (LCs) in wide orbits are exciting because they are important test beds for dark remnant (DR) formation physics as well as binary stellar evolution models. Recently, 187 candidates have been identified from <em>Gaia</em>'s non-single star catalog as wide orbit (P<sub>orb</sub>/day>45), detached binaries hosting DRs. We identify UV counterparts for 49 of these sources in the archival GALEX data. Modeling the observed spectral energy distribution (SED) spanning FUV-NUV to IR for these sources and stellar evolution models, we constrain the LC properties including mass, bolometric luminosity, and effective temperature for these 49 sources. Using the LC masses, and the astrometric mass function constrained by <em>Gaia,</em> we constrain the DR masses for these sources. We find that 9 have masses clearly in the NS or BH mass range. Fifteen sources exhibit significant NUV excess and 4 show excess both in FUV and NUV. The simplest explanation for these excess UV fluxes is that the DRs in these sources are WDs. Using SED modeling we constrain the effective temperature and bolometric luminosity for these 15 sources. Our estimated DR masses for all of these 15 sources are lower than the Chandrasekhar mass limit for WDs. Interestingly, five of these sources had been wrongly identified as neutron stars in literature.</p> <p>MIST_OUTPUT.zip : MIST output file for mass estimations</p> <p>Readme : Description of MIST_output files.</p>
Seismic Signatures of the 12C(α, γ)16O Reaction Rate in White Dwarf Models with Overshooting
<p>This data set has all necessary files and scripts to reproduce figures 1-8 in our accepted manuscript.</p>
Numerical code and data for the stellar structure and dynamical instability analysis of generalised uncertainty white dwarfs
Open the record for dataset details and reuse information.
The White Dwarf Opportunity - Supplementary material
<p>Supplementary material for '<em>The White Dwarf Opportunity: Robust Detections of Molecules in Earth-like Exoplanet Atmospheres with the James Webb Space Telescope</em>' - ApJL (2020).</p> <p>This repository contains three figures, and full posterior probability distributions, corresponding to the modelling and retrieval analysis from Kaltenegger & MacDonald et al. (2020). The supplementary materials are as follows:</p> <ul> <li><strong>WD_host_spectrum</strong> - comparison between the Sun's spectrum and the 5000 K white dwarf spectrum used in our atmospheric models.</li> <li><strong>Mixing_ratio_profiles </strong>- calculated atmospheric mixing ratio profiles of H<sub>2</sub>O, CH<sub>4</sub>, O<sub>3</sub>, CO<sub>2</sub>, N<sub>2</sub>O, CO, and CH<sub>3</sub>Cl for an Earth-like planet in the white dwarf habitable zone.</li> <li><strong>PT_profile </strong>- calculated pressure-temperature (P-T) profile for an Earth-like planet in the white dwarf habitable zone.</li> <li><strong>Posterior_N_trans_...</strong> - full posterior distributions from the atmospheric retrievals corresponding to 1, 2, 3, 5, 10, 25, 50, and 100 transits with JWST's NIRSpec Prism. Each corner plot depicts correlations between pairs of retrieved parameters and marginalised histograms for each parameter. Where parameters have clear upper and lower bounds, the median retrieved values and ±1σ confidence levels are given. Otherwise, parameter constraints are expressed as 2σ upper or lower bounds.</li> </ul> <p>For any questions, please contact: rmacdonald@astro.cornell.edu </p>
On The Impact of 22Ne On The Pulsation Periods of Carbon-Oxygen White Dwarfs With Helium Dominated Atmospheres
<p>This file contains the python scripts needed to re-produce figures 2-11 in our paper. It also contains the information to re-run our 22Ne tests and other WD mass models. The README.md file contains a more detailed description of the data. </p>
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.