Title: 20th European Workshop on White Dwarfs (EuroWD16)
Volume: 509 Year: 2017 View this Volume on ADS
Editors: Tremblay, P.-E.; Gaensicke, B.; Marsh, T.
University of Warwick
25–29 July 2016

This meeting was part of a series of biennial workshops started 42 years ago in 1974 in Kiel, Germany. The 20th EuroWD was the primary conference in 2015 and 2016 for researchers working on white dwarfs, and these proceedings present a snapshot of all aspects of current research on these exceptional evolved stars and their environments.

The 20th European Workshop on White Dwarfs had a record number of 148 participants from more than 20 countries. The oral and poster contributions were diverse, covering white dwarfs found in different Galactic environments and observed with many distinct observational techniques. Topics discussed in these proceedings include 1) white dwarf structure and evolution, 2) atmospheres, chemical composition, and magnetic fields, 3) pulsating white dwarfs, 4) progenitors and central stars of planetary nebulae, 5) binaries: white dwarfs with stellar or sub-stellar companions, double degenerates, and white dwarfs in cataclysmic variables, 6) degenerate stars as SNe Ia progenitors, 7) white dwarfs with evolved planetary systems, 8) white dwarfs in stellar clusters and in the Galactic halo, and 9) white dwarfs as probes of mass loss, the local star formation history, and the initial mass function.
ISBN: 978-1-58381-903-6 eISBN: 978-1-58381-904-3
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Paper Title Page Authors
Book Cover
Front Matter   
Front Matter 1 Tremblay, P.-E.; Gaensicke, B.; Marsh, T
Conference Photos 2 Tremblay, P.-E.; Gaensicke, B.; Marsh, T
Part I. White Dwarf Samples, Surveys, and Luminosity Functions   
The Montreal White Dwarf Database: A Tool for the Community 3 Dufour, P.; Blouin, S.; Coutu, S.; Fortin-Archambault, M.; Thibeault, C.; Bergeron, P.; Fontaine, G.
White Dwarfs in Gaia Data Release 1 9 Jordan, S.
Physical Properties of White Dwarfs from Multi-Band Photometry 13 Raddi, R.
A Tale of Two Surveys 19 Holberg, J. B.; Oswalt, T. D.; Sion, E.
Untangling the White Dwarf Luminosity Functions 25 Lam, M. C.
A Population Synthesis Study of the White Dwarf Cooling Sequence of the Galactic Bulge 29 Torres, S.; García-Berro, E. G.; Cojocaru, R. E.; Calamida, A.
The Double Cooling Sequence of the Globular Cluster ω Centauri 37 García-Berro, E.; Sendra, L.; Torres, S.; Althaus, L. G.
White Dwarfs in the Metal-Rich Open Cluster NGC 6253 43 Jeffery, E. J.; Campos, F.; Romero, A.; Kepler, S. O.
A Study of the SDSS White Dwarf Component in the LSPM Proper Motion Survey 51 Darveau-Bernier, A.; Bergeron, P.; Lépine, S.
Get Ready for Gaia: Cool White Dwarfs in Common Proper Motion with Tycho Stars 55 Hambly, N.; Rowell, N.; Lam, M.
Completeness of the Nearby White Dwarfs Sample: Let Us Count the Ways 59 Oswalt, T. D.; Holberg, J.; Sion, E.
Current Status of the Hot White Dwarf Luminosity Function and non-DA to DA Ratio from SDSS Data 65 Krzesinski, J.; Stachowski, G.
Sensitivity Analysis of Hierarchical Models for the Ages of Galactic Halo White Dwarfs 69 Si, S.; van Dyk, D. A.; von Hippel, T.
Bayesian Evidence for Two Populations of White Dwarfs: Preliminary Results 73 Valentim, R.; Romero, A. D.; Kepler, S. O.; Horvath, J. E.; Rangel, E. M.
Part II. SN Ia Connection   
Close Binary Progenitors and Ejected Companions of Thermonuclear Supernovae 79 Geier, S.; Kupfer, T.; Heber, U.; Nemeth, P.; Ziegerer, E.; Irrgang, A.; Schindewolf, M.; Marsh, T. R.; Gänsicke, B. T.; Barlow, B. N.; Bloemen, S.
Stripped Red Giants - Helium Core White Dwarf Progenitors and their sdB Siblings 85 Heber, U.
Dynamical Masses of Accreting White Dwarfs 91 Pala, A. F.; Gänsckie, B. T.
Part III. White Dwarfs with Planetary Systems   
The DECam Minute Cadence Survey 101 Belardi, C.; Kilic, M.; Munn, J. A.; Gianninas, A.; Barber, S. D.; Dey, A.; Stetson, P. B.
New Observations of the Mysterious Metal-Polluted White Dwarf GD 394 107 Wilson, D. J.; Gänsicke, B. T.; Koester, D.; Holberg, J.; Burleigh, M. R.; Belardi, C..
Explorations of Dusty Debris Disk Geometry 113 Dennihy, E.; Debes, J. H.; Clemens, C. J.
Disk Accretion of Tidally Disrupted Rocky Bodies onto White Dwarfs 121 Feng, W.; Desch, S.
The Dusty Accretion of Polluted White Dwarfs 127 Bonsor, A.; Farihi, J.; Wyatt, M. C.; van Lieshout, R.
New White Dwarf-Brown Dwarf Binaries 133 Casewell, S. L.; Geier, S.; Lodieu, N.
Part IV. Atmospheres: Composition and Evolution   
Modeling the Spectra of Dense Hydrogen Plasmas: Beyond Occupation Probability 143 Gomez, T. A.; Montgomery, M. H.; Nagayama, T.; Kilcrease, D. P.; Winget, D. E.
Reaching Higher Densities for Laboratory White Dwarf Photospheres to Measure Spectroscopic Line Profiles 149 Falcon, R. E.; Bailey, J. E.; Gomez, T. A.; Schaeuble, M.; Nagayama, T.; Montgomery, M. H.; Winget, D. E.; Rochau, G. A.
Infrared Opacities in Dense Atmospheres of Cool White Dwarf Stars 155 Kowalski, P. M.; Blouin, S.; Dufour, P.
Trace Hydrogen in Helium Atmosphere White Dwarfs as a Possible Signature of Water Accretion 163 Gentile-Fusillo, N. P.; Gänsicke, B. T.; Farihi, J.; Koester, D.; Schreiber, M. R.; Pala, A. F.
The Impact of Radiative Atmospheres on Spectroscopic and Photometric Analyses of Cool White Dwarfs 169 Lecavalier-Hurtubise, É.; Bergeron, P.
Trace Metals in PG1159 Stars and the First Identification of Metal Line Forbidden Components in Astrophysical Sources 177 Werner, K.; Hoyer, D.; Rauch, T.; Kruk, J. W.; Quinet, P.
Heavy Metals Resisting Gravity in White Dwarfs? 183 Rauch, T.; Gamrath, S.; Quinet, P.; Hoyer, D.; Werner, K.; Kruk, J. W.
Is the DO-type White Dwarf RE 0503–289 a Unique Object? 189 Hoyer, D.; Rauch, T.; Werner, K.
Understanding the Spectrum of the Very Hot DA White Dwarf PG 0948+534 195 Preval, S. P.; Barstow, M. A.
A Study of the Lyman-α Line Profile in DBA White Dwarfs 201 Genest-Beaulieu, C.; Bergeron, P.
Magnetic White Dwarfs with Heavy Elements 205 Hardy, F.; Dufour, P.; Jordan, S.
Spectroscopic Analysis of Hybrid White Dwarf Spectra from the Sloan Digital Sky Survey 211 Manseau, P. M.; Bergeron, P.; Green, E. M.
On the Interpretation of Cool, Helium-rich White Dwarfs Showing Traces of Hydrogen 215 Rolland, B.; Bergeron, P.; Fontaine, G.
Spectral Analysis of the sdO Standard Star Feige 34 219 Latour, M.; Chayer, P.; Green, E. M.; Fontaine, G.
The Role of Fingering Convection in Accreting Hydrogen-rich White Dwarfs: the Case of GD 133 and G 29-38 223 Wachlin, F. C.; Vauclair, S.; Vauclair, G.; Althaus, L. G.
A New Generation of Cool White Dwarf Atmosphere Models Using Ab Initio Calculations 227 Blouin, S.; Dufour, P.; Kowalski, P. M.
Helium at White Dwarf Photospheric Conditions: Preliminary Laboratory Results 231 Schaeuble, M.; Falcon, R. E.; Gomez, T. A.; Winget, D. E.; Montgomery, M. H.; Bailey, J. E.
The Tübingen Model-Atom Database: A Revised Aluminum Model Atom and its Application for the Spectral Analysis of White Dwarfs 235 Löbling, L.
Part V. Pulsating and Variable White Dwarfs   
Calibrating White Dwarf Asteroseismic Fitting Techniques 243 Castanheira, B. G.; Romero, A. D.; Bischoff-Kim, A.
H Dominates the Dispersion of Period Spacing for DAV Stars 249 Chen, Y.
Seismology of an Ensemble of ZZ Ceti Stars 255 Clemens, J. C.; O'Brien, P. C.; Dunlap, B. H.; Hermes, J. J.
Understanding Systematics in ZZ Ceti Model Fitting to Enable Differential Seismology 263 Fuchs, J. T.; Dunlap, B. H.; Clemens, J. C.; Meza, J. A.; Dennihy, E.; Koester, D.
Asteroseismology of Kepler ZZ Ceti Stars with Fully Evolutionary Models 269 Romero, A. D.; Córsico, A. H.; Castanheira, B. G.; De Gerónimo, F. C.; Kepler, S. O.; Althaus, L. G.; Koester, D.; Kawka, A.; Gianninas, A.; Bonato, C.
Signature of the Core Stratification in Pulsating White Dwarfs and Tests of Seismic Inversion 275 Charpinet, S.; Giammichele, N.; Brassard, P.; Fontaine, G.
Unraveling the Internal Chemical Composition of Kepler White Dwarf Pulsators 283 Giammichele, N.; Charpinet, S.; Fontaine, G.; Brassard, P.
Recent Advances in the Theoretical Modeling of Pulsating Low-mass He-core White Dwarfs 289 Córsico, A. H.; Althaus, L. G.; Calcaferro, L. M.; Serenelli, A. M.; Kepler, S. O.; Jeffery, C. S.
Asteroseismology of the ZZ Ceti Star WD 0246+326 295 Li, C.; Fu, J.; Fox-Machado, L.; Su, J.
The First Six Outbursting Cool DA White Dwarf Pulsators 303 Bell, K. J.; Hermes, J. J.; Montgomery, M. H.; Winget, D. E.; Gentile Fusillo, N. P.; Raddi, R.; Gänsicke, B. T.
Semi-Chaotic Behaviors Observed in the Asteroseismic Fitting of GD 358 309 Bischoff-Kim, A.; Provencal, J. L.
Time-Series Spectroscopy and Photometry of the Helium Atmosphere Pulsating White Dwarf EC 20058–5234 315 Sullivan, D. J.
The Theoretical Instability Strip of V777 Her White Dwarfs 321 Van Grootel, V.; Fontaine, G.; Brassard, P.; Dupret, M.-A.
Photometric Variability and Spectroscopic Characterisation of White Dwarfs in Kepler 2 Fields 329 Braker, I. P.; Burleigh, M. R.; Goad, M. R.; Casewell, S. L.; Buckley, D.; Holberg, J. B.; Lawrie, K. A.; Barstow, M. A.
The Post-outburst Pulsations of GW Librae 335 Chote, P.; Mukadam, A. S.; Aungwerojwit, A.; Szkody, P.; Gänsicke, B. T.; Sullivan, D. J.; Poshyachinda, S.; Reichart, D. E.; Haislip, J. B.; Moore, J. P.
Contrasting Accreting White Dwarf Pulsators with the ZZ Ceti Stars 341 Mukadam, A. S.; Szkody, P.; Gänsicke, B. T.; Pala, A.
Making Sense Out of Pulsating Pre-ELM and ELM White Dwarfs 347 Fontaine, G.; Istrate, A.; Gianninas, A.; Brassard, P.; Van Grootel, V.
Asteroseismology of the ZZ Ceti and DAZ GD 133 355 Fu, J.-N.; Vauclair, G.; Su, J.; Cang, T.; Li, C.; Xue, H.; Jiang, X.-J.; Li, Y.; Niu, H.; Zhang, X.; Colas, F.; Dolez, N.; Fox Machado, L.; Michel, R.; Alvarez, M.; Kim, S.-L.
Kepler Campaign 6 Observations of the DA Pulsating White Dwarf EC 14012–1446 359 Provencal, J. L.; Hermes, J. J.; Kawaler, S. K.; Shipman, H. L.; Bischoff-Kim, A.; Thompson, S. E.
A Search for Companions to the Pulsating sdB Star EC 20117–4014 363 Otani, T.; Oswalt, T.; Amaral, M.; Jordan, R.
Two New ZZ Ceti Stars from the LAMOST Survey 367 Su, J.; Fu, J.; Khokhuntod, P.; Lin, G.
Part VI. Structure, Stellar Evolution, and Fundamental Physics   
Fundamental Physics from Observations of White Dwarf Stars 375 Bainbridge, M. B.; Barstow, M. A.; Reindl, N.; Barrow, J. D.; Webb, J. K.; Hu, J.; Preval, S. P.; Holberg, J. B.; Nave, G.; Tchang-Brillet, L.; Ayres, T. R.
Sirius B: Confronting the Limits of our Understanding of White Dwarfs 383 Barstow, M. A.; Joyce, S.; Casewell, S. L.; Holberg, J. B.; Bond, H. E.; Burleigh, M. R.
HST Spectra of White Dwarfs and the Mass-Radius Relation 389 Joyce, S. R. G.; Barstow, M. A.; Casewell, S. L.; Holberg, J. B.; Bond, H. E.
Mass-Radius Relation of Strongly Magnetized White Dwarfs 395 Bera, P.; Bhattacharya, D.
Significantly Super-Chandrasekhar Limiting Mass White Dwarfs and their Consequences 401 Mukhopadhyay, B.; Das, U.; Rao, A. R.; Subramanian, S.; Bhattacharya, M.; Mukerjee, S.; Bhatia, T. S.; Sutradhar, J.
Magnetic Fields and the Crystallization of White Dwarfs 409 Isern, J.; García-Berro, E.; Külebi, B.; Lorén-Aguilar, P.
The Field White Dwarf Mass Distribution 415 Tremblay, P.-E.; Cummings, J.; Kalirai, J. S.
White Dwarf Mass Distribution 421 Kepler, S. O.; Koester, D.; Romero, A. D.; Ourique, G.; Pelisoli, I.
On the Evolution of Hydrogen-Deficient White Dwarfs 429 Camisassa, M. E.; Althaus, L. G.; Rohrmann, R. D.; García–Berro, E.; Córsico, A. H.
On the Formation of DA White Dwarfs with low Hydrogen Contents: Preliminary Results 435 Miller Bertolami, M. M.; Althaus, L. G.; Córsico, A. H.
New Grid of Models for ELM WDs Including Element Diffusion and Rotational Mixing 441 Istrate, A. G.
What's the Nature of sdA Stars? 447 Pelisoli, I.; Kepler, S. O.; Koester, D.; Romero, A. D.
sdA in SDSS DR12 are Overwhelmingly Not Extremely Low-Mass (ELM) White Dwarfs 453 Hermes, J. J.; Gänsicke, B. T.; Breedt, E.
Post-AGB Evolution Much Faster Than Previously Phought 457 Gesicki, K.; Zijlstra, A. A.; Miller Bertolami, M. M.
Are All Magnetic White Dwarf Stars Massive? 461 Nitta, A.; Kepler, S. O.; Kulebi, B.; Koester, D.; Kleinman, S. J.; Winget, D. E.; Castanheira, B. G.; Corsico, A. H.
Part VII. White Dwarfs in Binaries, Cataclysmic Variables   
Binarity in the Central Stars of Planetary Nebulae and its Relationship to Stellar Evolution: An Observational Perspective 469 Hillwig, T. C.; Jacoby, G. H.; Jones, D.; De Marco, O.
A Population Synthesis Study of White Dwarf–Main Sequence Binaries in the Galactic Disk 475 Cojocaru, R.; Rebassa-Mansergas, A.; Torres, S.; García-Berro, E.
Observational Constraints on the Age-Metallicity Relation from White Dwarf-Main Sequence Binaries 481 Rebassa-Mansergas, A.; Anguiano, B.; García-Berro, E.; Freeman, K. C.; Cojocaru, R.; Manser, C. J.; Pala, A. F.; Gänsicke, B. T.; Liu, X.-W.
The Missing Magnetic WDs in Detached Close Binaries 489 Tovmassian, G.; Gonzalez-Buitrago, D.; Zharikov, S.
The Flow Structure in the Vicinity of the Inner Lagrangian Point in Magnetic Cataclysmic Variables 495 Isakova, P. B.; Zhilkin, A. G.; Bisikalo, D. V.
Correlated X-ray and Optical Variability in Intermediate Polars During their Outbursts 501 Neustroev, V. V.; Tsygankov, S.; Suleimanov, V.; Sjoberg, G.
NuSTAR Observations of the Dwarf Nova GK Persei in 2015: Comparison between Outburst and Quiescent Phases 509 Wada, Y.; Yuasa, T.; Nakazawa, K.; Makishima, K.; Hayashi, T.; Ishida, M.
M31N 2008-12a — The Remarkable Recurrent Nova in M31 515 Darnley, M. J.
White Dwarf Mass Estimation with X-ray Spectroscopy 523 Hayashi, T.
Detection of Double White Dwarf Binaries with Gaia, LSST and eLISA 529 Korol, V.; Rossi, E. M.; Groot, P. J.
The Long-Term Behavior of Known & Suspected Novae 535 Pagnotta, A.
Light Curves Analysis of Deeply Eclipsed Dwarf Nova GY Cnc 543 Voloshina, I.; Khruzina, T.
What Simulations Tell Us About White Dwarf Evolution in AM CVn Close Binaries 549 Montgomery, M. M.
New Southern Cataclysmic Variables: Discoveries from MASTER-SAAO 555 Buckley, D. A. H.; Potter, S. B.; Kniazev, A.; Lipunov, V.; Gorbovskoy, E.; Tiurina, N.
Flare Activity and Polarization States of White Dwarfs in Binary Star Systems 563 Boneva, D.; Filipov, L.
Gaia14aae: the First Fully-Eclipsing AM CVn 567 Green, M. J.; Marsh, T. R.; Steeghs, D. T. H.; Breedt, E.; Campbell, H. C.; Dhillon, V. S.; Hardy, L. K.; Littlefair, S. P.
V471 Tauri: Examining Eclipse Timing Variations with two Independent Clocks 571 Vanderbosch, Z. P.; Clemens, J. C.; Dunlap, B. H.; Winget, D. E.
Back Matter   
Author Index 577 Tremblay, P.-E.; Gaensicke, B.; Marsh, T
Back Matter 580