White Dwarfs: Proceedings of IAU Colloquium No. 114 Held at Dartmouth College, Hanover, New Hampshire, USA, August 15–19, 1988

Volker Weidemann, Jie W. Yuan (auth.), Gary Wegner (eds.)3540510311, 9783540510314, 3540510311-:, 0387510311

This book contains the contributed papers and reviews from IAU Colloquium Number 114 on White Dwarfs held at Dartmouth College in August 1988. All the current fields of research in this area are covered including the evolution of white dwarfs, links to progenitors, luminosity functions of white dwarfs, evolution of white dwarfs in binaries, spectroscopy and atmospheric abundances, diffusion, accretion and convective mixing, the mass-radius relation, gravitational redshifts, masses of white dwarfs, and magnetic white dwarfs. Special emphasis has been placed on the intrinsic properties of single white dwarfs. All the articles are by internationally known authorities and contain the most up-to-date information available at the time of writing.

---

Table of contents :
Mass distribution and luminosity function of white dwarfs….Pages 1-14
The luminosity function of white dwarfs in the local disk and halo….Pages 15-23
Two new late-type degenerates: Implications for the white dwarf luminosity function….Pages 24-28
Pre-white dwarf evolution: Up to planetary nebulae….Pages 29-43
Evolution of white dwarfs: Starting from planetary nebulae….Pages 44-61
On the structure of pre-white dwarfs….Pages 62-65
Transport processes and neutrino emission processes in the interior of white dwarfs….Pages 66-80
The effect of Coulomb interactions on the helium flash….Pages 81-84
Equations of state of hydrogen-helium and carbon-oxygen mixtures….Pages 85-87
Gravitational collapse of mass-accreting white dwarfs….Pages 88-91
The temperatures of white dwarfs in accreting binaries….Pages 92-96
White dwarf evolution in real time: What pulsating white dwarfs teach us about stellar evolution….Pages 97-108
The whole earth telescope….Pages 109-114
The effects of time dependant convection on white dwarf radial pulsations….Pages 115-118
PG 1707+427: The DOV star with the simplest fourier transform….Pages 119-121
Observations of cold degenerate stars….Pages 122-125
Two new faint common proper motion pairs….Pages 126-129
Cluster analysis of the hot subdwarfs in the PG survey….Pages 130-133
An unsuccessful search for white dwarf companions to nearby main sequence stars….Pages 134-137
The Bologna/ESO search for double degenerates….Pages 138-138
Far ultraviolet observations of hot DA white dwarfs….Pages 139-143
Far-ultraviolet spectrophotometry of two do white dwarfs from Voyager ….Pages 144-148
A spectrophotometric atlas of white dwarfs compiled from the me archives….Pages 149-151
Scaleheights of low mass stars from the luminosity function of the local white dwarfs….Pages 152-155
ROSAT — an all-sky X-ray and EUV survey of white dwarfs….Pages 156-159
Results of a spectrophotometric survey of white dwarf suspects in the solar neighbourhood….Pages 160-162
Three double degenerate candidates….Pages 163-166
The ccd/transit instrument (CTI) blue objectsurvey….Pages 167-171
Low mass hydrogen envelopes and the DB gap….Pages 172-175
Diffusion and metal abundances in hot white dwarfs….Pages 176-187
Helium abundance in the photospheres of hot DA white dwarfs….Pages 188-193
Non-LTE spectral analysis of PG 1159-035….Pages 194-197
X-ray emission from hot DA white dwarfs; EXOSAT results, and implications for atmospheric models….Pages 198-201
The effect of CNO metal abundances on the soft X-ray emission from HE rich white dwarfs….Pages 202-205
Chemical stratification in white dwarf atmospheres and envelopes….Pages 206-219
Origin of the DA and non-DA white dwarf stars….Pages 220-235
Model atmospheres for very cool hydrogen-rich white dwarfs….Pages 236-239
An ultraviolet look at the blue edge of the ZZ ceti instability strip….Pages 240-243
Spectroscopic studies and atmospheric parameters OF ZZ Ceti stars….Pages 244-248
Finite element analysis of diffusion processes in white dwarfs….Pages 249-252
Heavy element abundances predicted by radiative support theory in the atmospheres of hot white dwarfs….Pages 253-257
Second-order effects due to rotation in pulsating DR white dwarfs….Pages 258-262
Are pulsatiohs a useful probe of the structure of the outer layers of white dwarfs ?….Pages 263-268
Cooling of white dwarfs with account of non-equilibrium beta-processes….Pages 269-272
Thermonuclear explosion in binaries: White dwarf helium star….Pages 273-277
The phase diagram of high density binary mixtures and the luminosity function of single white dwarfs….Pages 278-281
A variational approach to understanding white dwarf evolution….Pages 282-285
The effect of varying helium and hydrogen layer masses on the pulsation properties of white dwarf models….Pages 286-289
Discovery of the sixth dbv star: CBS 114….Pages 290-292
Optical frequencies in V471 Tau ….Pages 293-295
The time dependence of the phases of the harmonics relative to the 1490 sec fundamental in PG1346+082….Pages 296-299
A new hydrogen equation of state for low mass stars….Pages 300-304
Magnetic fields in white dwarfs….Pages 305-313
The magnetic white dwarfs in AM Her variables….Pages 314-323
Evidence of complex field structure in the magnetic white dwarf in EXO 033319-2554.2….Pages 324-328
Phase correlated spectra of magnetic white dwarfs….Pages 329-332
Synthetic spectra of magnetic white dwarfs….Pages 333-336
Masses and magnetic fields of white dwarfs in cataclysmic variables….Pages 337-340
G117-1115A: how is it evolving?….Pages 341-345
Pressure shifts of metal lines in cool white dwarfs….Pages 346-349
A new temperature determination for sirius B from IUE: Implications for the observed soft X-ray fluxes….Pages 350-353
The detection of ionized helium and carbon in the pulsating DB degenerate GD358….Pages 354-358
Time-dependent studies of the settling of heavy elements in the envelopes of cool white dwarfs….Pages 359-362
The atmospheric composition of the hot pre-degenerate star H1504+65 revisited….Pages 363-367
Stratified model atmospheres for not DA white dwarfs….Pages 368-372
An explanation for the euv spectrum of feige 24….Pages 373-377
Gravitational redshifts for hyades white dwarfs….Pages 378-383
The high resolution spectrum of the pulsating, pre-white dwarf star PG 1159-035 (GW VIR)….Pages 384-387
Polarized radiation from inhomogeneous accretion columns in am herculis binaries….Pages 388-391
Thomson scattering in magnetic fields….Pages 392-395
H-alpha emission in hot degenerates and OB subdwarfs….Pages 396-400
Gravitational redshifts and the mass-radius relation….Pages 401-407
The search for close binary evolved stars….Pages 408-412
The nearby binary, Stein 2051 (G175-34AB)….Pages 413-415
White dwarfs in globular clusters….Pages 416-429
Toward a determination of the helium abundance in cool DA white dwarfs….Pages 430-434
Constraints on the atmospheric parameters of the binary DA white dwarf L870-2 (EG11)….Pages 435-439
The white dwarf mass and orbital period distribution in zero-age cataclysmic binaries….Pages 440-442
The optical spectra of V803 Cen….Pages 443-445
The period problem of the interacting binary white dwarf system AM CVn….Pages 446-449
Critical mass for merging in double white dwarfs….Pages 450-453
On the separations of common proper motion binaries containing white dwarfs….Pages 454-457
Time resolved spectroscopy of AM CVn….Pages 458-461
High frequency oscillations in SS CYGNI….Pages 462-464
The mass spectrum of the white dwarfs in cataclysmic binaries….Pages 465-468
Evolution of low-mass helium dwarfs in interacting binaries: Application to 4UI820-30….Pages 469-472
Binary, pulsating, and irregular variables among planetary nuclei….Pages 473-476
On the formation of close binary white dwarfs….Pages 477-491
A limit on the space density of short-period binary white dwarfs….Pages 492-497
On the masses of the white dwarfs in classical nova systems….Pages 498-506
Growth rate of white dwarf mass in binaries….Pages 507-510
Dynamic mass exchange in doubly degenerate binaries. II. The importance of nuclear energy release….Pages 511-514
The coalescence of white dwarfs and type I supernovae….Pages 515-518
White dwarf — accretion disk boundary layers….Pages 519-523
High resolution optical spectra of 120 white dwarfs….Pages 524-524