Title: 19th European Workshop on White Dwarfs
Volume: 493 Year: 2015 View this Volume on ADS
Editors: Dufour, P.; Bergeron, P.; Fontaine, G.

Montreal, Canada
11-15 August, 2014

The 19th European Workshop on White Dwarfs held at the Université de Montréal, Canada, August 11-15, 2014. This meeting was part of a series of biennial conferences founded some 40 years ago by the late Professor Volker Weidemann at the University of Kiel, Germany, and which now draws participants from around the globe. Indeed, the European Workshops on White Dwarfs have become the most significant scientific gatherings of researchers interested in this type of stars. These proceedings constitute a snapshot of current research on white dwarf stars suitable for scientists and graduate students studying these important stars.

The 19th European Workshop on White Dwarfs in Montréal was attended by 130 participants from 21 different countries. A large fraction of the attendees were graduate students and postdocs, reflecting the youthfulness and vitality of the white dwarf community. The main scientific topics discussed were: 1) Atmospheres, Abundance Analyses, and Chemical Composition; 2) Structure, Evolution, and Ages; 3) Pulsating White Dwarfs and Asteroseismology; 4) Disks, Dust, and Planets around White Dwarfs; 5) Fundamental Properties of White Dwarfs; 6) Properties of White Dwarf Populations and Clusters; 7) Physical Processes in White Dwarfs; 8) Surveys: Results and Prospects; 9) White Dwarfs in Binaries; 10) Central Stars of Planetary Nebulae; and 11) Supernova Progenitors and Supernovae.
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Paper Title Page Authors
Book Cover Dufour, P.; Bergeron, P.; Fontaine, G.
Front Matter   
Front Matter 1 Dufour, P.; Bergeron, P.; Fontaine, G.
Conference Photos 2 Dufour, P.; Bergeron, P.; Fontaine, G.
Part I. Atmospheres, Abundance Analyses, Chemical Composition   
Detection of Arsenic in the Atmospheres of Dying Stars 3 Chayer, P.; Dupuis, J.; Kruk, J. W.
HD188112: Supernova Ia Progenitor? 9 Latour, M.; Irrgang, A.; Heber, U.; Schaffenroth, V.
A Possible Solution to the Lyman/Balmer Line Problem in Hot DA White Dwarfs 15 Preval, S. P.; Barstow, M. A.; Badnell, N. R.; Holberg, J. B.; Hubeny, I.
Hot, Hydrogen-deficient White Dwarfs in the Sloan Digital Sky Survey Data Release 10 21 Reindl, N.; Rauch, T.; Werner, K.; Kepler, S. O.; Gänsicke, B.; Gentile Fusillo, N. P.
Trans-iron Elements in the Hot DO-type White Dwarf RE0503–289 and the Prospective Search for Technetium 27 Werner, K.; Rauch, T.; López-Urrutia, J. R. C.; Kruk, J. W.; Kučas, S.; Quinet, P.
On the Origin of Hydrogen in DB White Dwarfs 33 Bergeron, P.; Rolland, B.; Limoges, M.-M.; Giammichele, N.; Séguin-Charbonneau, L.; Green, E. M.
Magnetic Atmosphere Models for White Dwarfs with Heavy Elements 37 Dufour, P.; Jordan, S.; Blouin, S.; Tardif, F.; Groulx, J.; Kilic, M.; Gianninas, A.; Barber, S. D.; Gilligan, C.
Photometric and Spectroscopic Analysis of Warm DQ White Dwarfs 41 Fortier, A.; Dufour, P.
Comparative Analysis of Atmospheric Parameters Obtained from the Photometric and Spectroscopic Techniques 45 Genest-Beaulieu, C.; Bergeron, P.; Darveau-Bernier, A.
TheoSSA - Model WD Spectra on Demand: The Impact of Ne, Na, Mg, and Iron-group Elements on the Balmer Lines 49 Reindl, N.; Rauch, T.
Model Atmosphere Analysis of the Magnetic Field in Cool, Hydrogen-line (DA) White Dwarfs 53 Rolland, B.; Bergeron, P.
Part II. Structure and Evolution, Ages   
Amplitude Variability as Evidence of Crystallization in GD 518 and Other Massive Pulsating White Dwarfs 59 Hermes, J. J.; Kepler, S. O.; Montgomery, M. H.; Gianninas, A.; Castanheira, B. G.; Winget, D. E.
Rotation of White Dwarf Stars 65 Kawaler, S. D.
Rotation and Strong Magnetism of White Dwarfs 71 Kissin, Y.; Thompson, C.
Atmospheric Parameters and Carbon Abundance for Hot DB White Dwarfs 77 Koester, D.; Provencal, J.; Gänsicke, B. T.
Post-Asymptotic Giant Branch Evolution of Low- and Intermediate-Mass Stars. Preliminary Results 83 Miller Bertolami, M. M.
Calibration of the Mixing-Length Free Parameter for White Dwarf Structures 89 Tremblay, P.-E.; Ludwig, H.-G.; Freytag, B.; Fontaine, G.; Steffen, M.; Brassard, P.
The Very Fast Evolution of the VLTP Object V4334 Sgr 95 van Hoof, P. A. M.; Kimeswenger, S.; Van de Steene, G. C.; Zijlstra, A. A.; Hajduk, M.; Herwig, F.
Fingering Convection and its Consequences for Accreting White Dwarfs 101 Vauclair, S.; Vauclair, G.; Deal, M.; Wachlin, F. C.
Deriving the Ages of Field White Dwarfs 107 von Hippel, T.; van Dyk, D.; Si, S.; Montgomery, M. H.; O'Malley, E.; Robinson, E.; Stenning, D.; Stein, N.; Kraczek, E. J.; Jefferys, W. H.; Webster, A.
Metal Accretion onto White Dwarfs. I. The Approximate Approach Based on Estimates of Diffusion Timescales 113 Fontaine, G.; Brassard, P.; Dufour, P.; Tremblay, P.-E.
Metal Accretion onto White Dwarfs. II. A Better Approach Based on Time-Dependent Calculations in Static Models 117 Fontaine, G.; Chayer, P.; Dupuis, J.; Dufour, P.; Brassard, P.
Metal Accretion onto White Dwarfs. III. A Still Better Approach Based on the Coupling of Diffusion with Evolution 121 Brassard, P.; Fontaine, G.
Improvements in the Montréal Evolutionary Code and Application to White Dwarfs 125 Brassard, P.; Fontaine, G.
On Thermohaline Mixing in Accreting White Dwarfs 129 Koester, D.
Testing Fundamental Particle Physics with the Galactic White Dwarf Luminosity Function 133 Miller Bertolami, M. M.; Melendez, B. E.; Althaus, L. G.; Isern, J.
Determination of the Core Composition of White Dwarfs in M67 137 Simon, A.; Fontaine, G.; Brassard, P.
The Born-again Planetary Nebulae Abell 30 and Abell 78 141 Todt, H.; Guerrero, M. A.; Fang, X.; Toalá, J. A.; Arthur, J. S.; Blair, W. P.; Chu, Y.-H.; Gruendl, R. A.; Hamann, W.-R.; Márquez-Lugo, R. A.; Oskinova, L.; Ruiz, N.; Steffen, M.; Schönberner, D.
Deriving Precise Ages of Field White Dwarfs using Bayesian Techniques 145 Webster, A.; von Hippel, T.; Si, S.; van Dyk, D.; Montgomery, M.; Robinson, E.; Stenning, D.; Stein, N.; Kraczek, E. J.; Jefferys, W. H.; O'Malley, E.
Part III. Pulsating White Dwarfs, Asteroseismology   
Method and Tools for an Objective Approach of White Dwarf Asteroseismology 151 Charpinet, S.; Giammichele, N.; Brassard, P.; Van Grootel, V.; Fontaine, G.
Quasi-Periodic Variations of the Pulsation Frequencies of Three White Dwarfs 157 Dalessio, J.; Provencal, J. L.; Shipman, H. L.
Parametric Modeling in Action: High Accuracy Seismology of Kepler DAV Stars 163 Giammichele, N.; Fontaine, G.; Charpinet, S.; Brassard, P.; Greiss, S.
White Dwarfs in the Kepler Field - What's New? 169 Greiss, S.; Gänsicke, B. T.; Hermes, J. J.; Giammichele, N.; Fontaine, G.; Koester, D.; Bell, K.; Breedt, E.; Steeghs, D.
Patterns Emerging from the Asteroseismic Studies of DBVs 175 Bischoff-Kim, A.
An Amplitude Limitation Mechanism for Pulsating White Dwarfs 181 Montgomery, M. H.; Romero, A. D.; Córsico, A. H.
Nonlinear Analysis of Pulsating White Dwarf Lightcurves 187 Provencal, J. L.; Montgomery, M. H.; Shipman, H.; WET Team
Pulsations of Pre-White Dwarfs with Hydrogen-dominated Atmospheres 193 Maeda, K.; Shibahashi, H.
The Frequency Stability of the Pulsating White Dwarf L19-2 199 Sullivan, D. J.; Chote, P.
An Update on the Quirks of Pulsating, Accreting White Dwarfs 205 Szkody, P.; Mukadam, A. S.; Gänsicke, B. T.; Hermes, J. J.; Toloza, O.
The Instability Strip of ZZ Ceti White Dwarfs 211 Van Grootel, V.; Fontaine, G.; Brassard, P.; Dupret, M.-A.
SDSS J1618+3854: The Sixth Extremely Low-Mass White Dwarf Pulsator 217 Bell, K. J.; Kepler, S. O.; Montgomery, M. H.; Hermes, J. J.; Harrold, S. T.; Winget, D. E.
Theoretical Modeling of Pulsating Low-mass White Dwarfs 221 Córsico, A. H.; Althaus, L. G.
The Impact of the Uncertainties in the 12C(α,γ)16O Reaction Rate on the Asteroseismology of ZZ Ceti Stars: First Results 225 De Gerónimo, F. C.; Córsico, A. H.; Althaus, L. G.; Romero, A. D.
Asteroseismic Constraints on the Neutrino Magnetic Dipole Moment 229 Córsico, A. H.; Althaus, L. G.; Miller Bertolami, M. M.; Kepler, S. O.; García-Berro, E.
Determination of the Core Composition of ZZ Ceti Stars through Seismic Means 233 Giammichele, N.; Fontaine, G.; Charpinet, S.; Brassard, P.
High-speed Photometric Observations of ZZ Ceti White Dwarf Candidates 237 Green, E. M.; Limoges, M.-M.; Gianninas, A.; Bergeron, P.; Fontaine, G.; Dufour, P.; O'Malley, C. J.; Guvenen, B.; Biddle, L. I.; Pearson, K.; Deyoe, T. W.; Bullivant, C. W.; Hermes, J. J.; Van Grootel, V.; Grosjean, M.
Time Series Spectroscopic and Photometric Observations of the Massive DAV BPM 37093 241 Nitta, A.; Kepler, S. O.; Chené, A.-N.; Koester, D.; Provencal, J. L.; Kleinman, S. J.; Sullivan, D. J.; Chote, P.; Sefako, R.; Kanaan, A.; Romero, A.; Corti, M.; Kilic, M.; Montgomery, M. H.; Winget, D. E.
Amplitude Modulation in the ZZ Ceti Star GD 244 245 Bognár, Zs.; Paparó, M.; Molnár, L.; Plachy, E.; Sódor, Á.
The Puoko-nui Photometers 249 Sullivan, D. J.; Chote, P.; Harrold, S. T.; Winget, D. E.
GW Lib: a Unique Laboratory for White Dwarf Pulsations 253 Toloza, O.; Gänsicke, B. T.; Hermes, J. J.; Townsley, D. M.; Szkody, P.; Beuermann, K.; Bildsten, L.; de Martino, D.; Godon, P.; Henden, A. A.; Hubeny, I.; Knigge, C.; Long, K. S.; Marsh, T. R.; Patterson, J.; Schreiber, M. R.; Sion, E. M.; Zorotovic, M.
A First Look at the Nonadiabatic Properties of Pulsating Accreting White Dwarfs of the GW Lib Type 257 Van Grootel, V.; Fontaine, G.; Brassard, P.; Dupret, M.-A.
Evidence of Resonant Mode Coupling in the Pulsating DB White Dwarf Star KIC 08626021 261 Zong, W.; Charpinet, S.; Vauclair, G.
Part IV. Disks, Dust, and Planets Around White Dwarfs   
Evolved Planetary Systems around Very Cool and Old White Dwarfs 267 Hollands, M. A.; Gänsicke, B. T.; Koester, D.
Is the Oxygen-Rich White Dwarf SDSS J1242+5226 Accreting Water-Abundant Debris? 273 Raddi, R.; Gänsicke, B. T.; Koester, D.; Farihi, J.; Hermes, J. J.; Scaringi, S.; Breedt, E.; Girven, J.
Variable Emission from a Gaseous Disc around a Metal-Polluted White Dwarf 279 Wilson, D. J.; Gänsicke, B. T.; Koester, D.; Raddi, R.; Breedt, E.; Southworth, J.; Parsons, S. G.
Limits from the Ongoing Search for Planets Around White Dwarf Stars Using Pulsation Timings 285 Winget, D. E.; Hermes, J. J.; Mullally, F.; Bell, K. J.; Montgomery, M. H.; Williams, S. G.; Harrold, S. T.; Kepler, S. O.; Castanheira, B.; Chandler, D. W.; Winget, K. I.; Mukadam, A. S.; Nather, R. E.
Recognition of the First Observational Evidence of an Extrasolar Planetary System 291 Zuckerman, B.
The Search for Transits Around White Dwarfs 295 Braker, I. P.; Burleigh, M. R.; Lawrie, K. A.; Faedi, F.; Goad, M. R.; West, R. G.
Part V. Fundamental Properties of White Dwarfs   
Constraining the Initial-Final Mass Relation with Wide Double White Dwarfs 301 Andrews, J. J.; Agüeros, M. A.; Gianninas, A.; Kilic, M.; Dhital, S.; Anderson, S.
Refining our Knowledge of the White Dwarf Mass-Radius Relation with HST Observations of Sirius-type Binaries 307 Barstow, M. A.; Bond, H. E.; Burleigh, M. R.; Casewell, S. L.; Farihi, J.; Holberg, J. B.; Hubeny, I.
A Detailed Study of CSS 41177: an Eclipsing Double White Dwarf 313 Bours, M. C. P.; Marsh, T. R.; Parsons, S. G.; Copperwheat, C. M.; Dhillon, V. S.; Littlefair, S. P.; Gänsicke, B. T.; Gianninas, A.; Tremblay, P.-E.
Cluster White Dwarfs and the Initial Mass-Final Mass Relation 319 Casewell, S. L.; Dobbie, P. D.
Calibrating the Initial-Final Mass Relationship with White Dwarf Binaries 325 Catalán, S.
Constraints to Post-AGB Evolution Speed and to IFMR Derived from Planetary Nebulae 331 Gesicki, K.; Zijlstra, A. A.
New Insights on the White Dwarf Luminosity and Mass Functions from the LSS-GAC Survey 337 Rebassa-Mansergas, A.; Liu, X.-W.; Cojocaru, R.; Yuan, H.-B.; García–Berro, E.; Torres, S.; Xiang, M.-X.; Huang, Y.
Removing the "Plateau" from Hot White Dwarf Luminosity Functions 343 Krzesinski, J.; Torres, S.; García–Berro, E.
Cool White Dwarfs Selection with Pan-STARRS Proper Motions 347 Lam, M. C.; Hambly, N. C.
The Initial-Final Mass Relation and its Dependence with Metallicity 351 Romero, A. D.; Campos, F.; Kepler, S. O.
Derivation of the Stellar Formation History from White Dwarfs in the Solar Neighborhood 355 Tremblay, P.-E.; Kalirai, J. S.; Soderblom, D. R.; Cignoni, M.; Cummings, J.
Part VI. Properties of White Dwarf Populations, Clusters   
A Population Synthesis Study of the MS+WD Population in the SDSS 361 García–Berro, E.; Torres, S.; Camacho, J.; Rebassa–Mansergas, A.; Gänsicke, B. T.; Schreiber, M. R.; Zorotovic, M.
Commentary and Casual Observations on the SDSS DR7 Spectroscopic Sample 367 Holberg, J. B.
Deep Observations of the Open Cluster NGC 6253 373 Jeffery, E. J.
A Population Synthesis Study of the White Dwarf Cooling Sequence of 47 Tucanae 379 Torres, S.; García–Berro, E.; Althaus, L. G.; Miller Bertolami, M. M.
The Blue Turn in the White Dwarf Stars of Globular Clusters 385 Campos, F.; Bergeron, P.; Romero, A. D.; Kepler, S. O.; Bonatto, C. J.; Winget, D. E.; Montgomery, M. H.
A Study of the Effects of Metallicity on the Population of Galactic Disk White Dwarfs 389 Cojocaru, R.; Torres, S.; Isern, J.; García–Berro, E.
White Dwarfs in the Galactic Plane: an Outlook to the Field and Clustered Population 393 Raddi, R.; Catalán, S.; Steeghs, D.; Gänsicke, B. T.; Hermes, J. J.; Drew, J. E.; Mohr-Smith, M.; EGAPS consortium
Part VII. Physical Processes in White Dwarfs   
Which Hydrogen Balmer Lines are Most Reliable for Determining White Dwarf Atmospheric Parameters? 399 Falcon, R. E.; Rochau, G. A.; Bailey, J. E.; Gomez, T. A.; Montgomery, M. H.; Winget, D. E.; Nagayama, T.
High Transparency of Photosphere Plasma for Electromagnetic Waves Polarized Across Strong Magnetic Field on White Dwarfs 405 Koryagin, S. A.
Completely Bound Motion of Electrons with Positive Energy near Protons in a Cool White Dwarf Photosphere Plasma with Strong Magnetic Field 411 Koryagin, S. A.; Arsenyev, S. A.
Do the Constants of Nature Couple to Strong Gravitational Fields? 415 Preval, S. P.; Barstow, M. A.; Holberg, J. B.; Barrow, J. D.; Berengut, J. C.; Webb, J. K.; Dougan, D.; Hu, J.
Diffusion Coefficients in White Dwarfs 419 Saumon, D.; Starrett, C. E.; Daligault, J.
Part VIII. Surveys: Results and Prospects   
White Dwarf Pulsations in LSST 425 Bell, K. J.; Claver, C. F.; Krughoff, K. S.; Montgomery, M. H.; Mukadam, A. S.; Winget, D. E.
White Dwarfs in HETDEX: Preparation for the Survey 431 Castanheira, B. G.; Winget, D. E.
White Dwarfs in SDSS DR9 and DR10 437 Gentile Fusillo, N. P.; Gänsicke, B.; Koester, D.
White Dwarf Research with Gaia 443 Jordan, S.
New White Dwarfs in the SDSS DR10 449 Kepler, S. O.; Pelisoli, I.; Koester, D.; Ourique, G.; Kleinman, S. J.; Romero, A. D.; Nitta, A.; Eisenstein, D. J.; Costa, J. E. S.; Külebi, B.; Jordan, S.; Dufour, P.; Giommi, P.; Rebassa-Mansergas, A.
Detectability of Substellar Companions Around White Dwarfs with Gaia 455 Silvotti, R.; Sozzetti, A.; Lattanzi, M.; Morbidelli, R.
Using White Dwarfs to Calibrate the Dark Energy Survey 459 Smith, J. A.; Tucker, D. L.; Fix, M. B.; Wester, W. C.; Tremblay, P.-E.; Charbonnier, S.
Future Observations of White Dwarfs from Space 463 Barstow, M. A.; Casewell, S. L.
Part IX. White Dwarfs in Binaries   
Testing Common Envelopes on Double White Dwarf Binaries 469 Nandez, J. L. A.; Ivanova, N.; Lombardi Jr., J. C.
The Population of White Dwarf Binaries with Hot Subdwarf Companions 475 Geier, S.; Kupfer, T.; Heber, U.; Barlow, B. N.; Maxted, P. F. L.; Heuser, C.; Schaffenroth, V.; Ziegerer, E.; Østensen, R. H. O.; Gänsicke, B. T.
The Search for the Shortest Period Binary White Dwarfs: The Latest Results from the ELM Survey 481 Gianninas, A.; Kilic, M.; Brown, W. R.; Canton, P.; Hermes, J. J.; Bell, K. J.; Harrold, S. T.
The Formation of Low-mass Helium White Dwarfs in Close Binaries 487 Istrate, A. G.
Enigmas from the Sloan Digital Sky Survey DR7 White Dwarf Catalog 493 Liebert, J.; Smith, P. S.; Ferrario, L.; Wickramasinghe, D. T.
Angular Momentum Evolution of V455 Andromedae 495 Mukadam, A. S.; Pyrzas, S.; Townsley, D. M.; Gänsicke, B. T.; Hermes, J. J.; Szkody, P.
Dynamical Masses of Cool White Dwarfs in Double Degenerate Binary Systems 501 Nelan, E. P.; Bond, H. E.; Schaefer, G.
Evolution of Nova TrA 2008 into a High Mass-Accretion Rate Post-Nova 507 Walter, F. M.
Analysis of Eclipses in V1032 Ophiuchi 513 Bkakowska, K.; Olech, A.
Study of Dwarf Novae Outbursts 517 Otulakowska-Hypka, M.; Olech, A.
An Intensive HST/COS Study of 31 CV WDs 521 Pala, A. F.; Gänsicke, B. T.; Beuermann, K.; Bildsten, L.; De Martino, D.; Godon, P.; Henden, A. A.; Hubeny, I.; Knigge, C.; Long, K. S.; Marsh, T. R.; Patterson, J.; Schreiber, M. R.; Sion, E. M.; Szkody, P.; Townsley, D.; Zorotovic, M.
Part X. Central Stars of Planetary Nebulae   
When a Couple's Squabbling Leads to Cosmic Bubbles 527 Boffin, H. M. J.
Evolution of the Central Stars of Young Planetary Nebulae 533 Hajduk, M.; van Hoof, P. A. M.; Zijlstra, A. A.
Hydrogen-deficient Central Stars of Planetary Nebulae 539 Todt, H.; Kniazev, A. Y.; Gvaramadze, V. V.; Hamann, W.-R.; Peña, M.; Gräfener, G.; Buckley, D.; Crause, L.; Crawford, S. M.; Gulbis, A. A. S.; Hettlage, C.; Hooper, E.; Husser, T.-O.; Kotze, P.; Loaring, N.; Nordsieck, K. H.; O'Donoghue, D.; Pickering, T.; Potter, S.; Romero-Colmenero, E.; Vaisanen, P.; Williams, T.; Wolf, M.
Part XI. Supernova Progenitors, Supernovae   
Hot DQ White Dwarf Stars as Failed Type Ia Supernovae 547 Dunlap, B. H.; Clemens, J. C.
Long Term Modelling of Recurrent Novae Resulting in SNIa 553 Hillman, Y.; Prialnik, D.; Kovetz, A.; Shara, M. M.
A Spherical Chandrasekhar-Mass Delayed-Detonation Model for a Normal Type Ia Supernova 559 Blondin, S.; Dessart, L.; Hillier, D. J.
The Physics and End-Products of Merging CO WD Binaries 563 Zhu, C.
Back Matter   
Author Index 569 Dufour, P.; Bergeron, P.; Fontaine, G.
Back Matter 573