de Martino / Silvotti / Solheim White Dwarfs

2003
ISBN: 978-94-010-0215-8
Verlag: Springer Netherland
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, Band 105, 429 Seiten, eBook

Reihe: NATO Science Series II: Mathematics, Physics and Chemistry

Proceedings of the NATO Advanced Research Workshop, held in Naples, Italy, 24-28 June 2002

Zielgruppe

Research

Autoren/Hrsg.

de Martino, Domitilla

Silvotti, Roberto

Solheim, Jan-Erik

Kalytis, Romualdas

Inhaltsverzeichnis

1. White Dwarf Structure and Evolution.- On Oxygen-Neon white dwarfs.- Progenitor evolution and chemical stratification in CO white dwarfs.- Convective coupling: a largely overlooked effect in cooling white dwarfs.- Sinking of 22Ne in liquid WD interiors.- From red giants to white dwarfs: a radiation-hydrodynamics simulation of the planetary nebula stage.- The star formation rate from white dwarfs.- New determination of 12C(?, ?)16O reaction rate and impact on WD models.- The origin of white dwarf rotation velocities.- 2. SNIa Progenitors.- Type Ia Supernovae: constraints for the progenitor scenario.- A new evolutionary path for the progenitors of type Ia supernovae.- Search for double degenerate progenitors of Supernovae type Ia with SPY.- Double degenerates from the Supernova Ia Progenitor Survey (SPY).- 3. Subdwarf B stars.- Subluminous B stars and progenitors of helium core white dwarfs.- The progeny of binary white dwarf mergers.- New subdwarf B star periods.- SdB stars and the structure of the milky way.- High signal-to-noise ratio observations of EC 14026 pulsators.- Fundamental parameters of sdB pulsators from asteroseismology.- Towards asteroseismology of the non-radial pulsating sdB star PG 1605+072.- Pulsation period stability in the sdBV star HS 2201+2610.- Feige 48: a model match for the coolest pulsating subdwarf B star.- MMT blue spectrograph observations of sdB stars: heavy elements abundances.- Radial velocity variations and metal abundances of three bright sdB stars.- Preliminary results from CCD monitoring:light curves of subdwarf B stars.- Physical parameters for subdwarf B stars with composite spectra.- Are helium-rich subdwarf B stars the products of white dwarf mergers ?.- Spectroscopic studies of the pulsating sdB binary PG 1336-018.- Companions to subdwarf B stars — degenerate or non-degenerate ?.- Hot subdwarfs: further photometric observations of pulsating and non pulsating objects.- The temperature of the cool stars in three eclipsing binary systems with the sdB components: HW Vir, PG 1336-018 and HS 0705+670.- Analysis of FUSE and IUE spectra of the sdOB star EC 11481-2303.- Photometric and spectroscopic monitoring of the sdBV star PG 1605+072: the Multi-Site Spectroscopic Telescope (MSST) project.- Stellar wind signatures in sdB stars?.- 4. Atmospheres and Chemical Composition.- A new determination of the spectroscopic mass and radius for Sirius B.- Metal abundances in PG 1159 stars from CHANDRA and FUSE spectroscopy.- High resolution EUV & FUV spectroscopy of DA white dwarfs.- Detection of photospheric O VI in the FUSE spectra of low metallicity white dwarfs.- FUSE observations of the DAO white dwarf Feige 55.- FUSE spectra of DO white dwarfs.- Trace metals in cool DA white dwarfs.- Spectroscopic determination of mass for a sample of DAO white dwarfs.- Improved results for equilibrium abundances from diffusion calculations.- Discovery of oxygen in the DQ white dwarf star G 227-5 (PG 1727+560): a progress report.- Spectral analysis of supra horizontal branch stars in globular clusters.- Abundance patterns in hot DA atmospheres from FUSE.- FUSE observations of the peculiar hot sdO star MCT 0019-2441.- Lyman gamma satellites due to H-H+ collisions: application to FUSE observations of hot white dwarfs.- Quasi-molecular lines in Lyman wings of cool DA white dwarfs; application to FUSE observations of G 231-40.- Defining the red edge of the DB gap with PG 0112+104.- The FUSE spectrum of the DB white dwarf GD 190.- Search for oxygen in cool DQ white dwarf atmospheres.- FUSE spectroscopy of the two prototype white dwarfs with signatures of a super-hot wind.- 5. Magnetic White Dwarfs.- Progress in modeling magnetic white dwarfs.- Spectropolarimetric survey of southern hydrogen-rich white dwarfs.- Magnetic field evolution in accreting white dwarfs.- Radiation-driven diskons.- Constraints on the parameters of a magnetic white dwarf corona imposed by its cyclotron emission.- Zeeman tomography of magnetic white dwarfs: general method and application to EF Eridani.- Magnetic white dwarfs in the SDSS.- WD 1953-011 — a white dwarf with a star spot ?.- Do magnetic fields prevent hydrogen from accreting on to cool metal-line white dwarfs ?.- Electromagnetic radiation from accretion-induced collapse of a white dwarf.- Magnetic reconnection in the accretion-disk corona of compact stars.- Cyclotron emission features in polars with low accretion rates.- Transfer of cyclotron radiation in plasmas on magnetic white dwarfs.- Modelling magnetic DB white dwarfs.- 6. Variable White Dwarfs.- The ZZ Ceti instability strip: facts and fallacies.- Heat waves and WD cooling theory in ZZ Ceti stars.- Searching for the most stable pulsating stars.- The DBV white dwarf EC 20058-5234.- Progress report on the hot DB PG 0112+104.- Period stability on pulsating white dwarfs.- Diffusion in variable DA white dwarfs.- Disentangling the core from the envelope in pulsating white dwarf stars.- White dwarf seismology and the 12C(?, ?)16O rate.- Group behaviour of the pulsating DB white dwarf stars.- Asteroseismology of the DB star GD 358: improved evolutionary models.- On mode trapping properties of full DA white dwarf evolutionary models.- Preliminary results of the WET Xcov22 campaign at Calar Alto observatory.- Search for magnetic fields among non-pulsators in the DAV instability strip.- 3He in variable DB white dwarfs?.- Wavelength dependence of pulsation amplitudes in DBV white dwarfs.- Towards understanding another cool DA white dwarf pulsator: G 255-2.- 7. White Dwarfs in Binaries.- Direct impact accretors: evolutionary links between detached and semi-detached white dwarfs.- Helium white dwarfs remnants of binary evolution in globular clusters: hints from the case of the optical companion of PSR J 1740-5340 in NGC 6397.- Eclipsing binary ms pulsar PSR J 1740-5340: pre-He white dwarf + ms pulsar system?.- They’re hot, hot, hot.- HST observations of white dwarfs in close and wide binaries.- Gravitational waves from the merging of white dwarfs.- The AM CVn systems — and their white dwarfs.- The properties of non-magnetic white dwarfs in cataclysmic variables.- White dwarfs in cataclysmic variables: HST results on GW Lib and gleanings from SDSS provide insight on the effects of accretion.- Internal conditions of accreting white dwarfs.- White dwarfs in magnetic cataclysmic variables.- The white dwarfs in the Intermediate Polars.- Principal components of variability of the accretion structures near white dwarfs.- Imaging planets around white dwarfs.- Rapid photometric changes in the temporal spectra of the PNN NGC 246.- The search for planets around pulsating white dwarf stars.- Variations of the outburst characteristics of the dwarf nova RU Peg.- Far-UV observations of Sirius-like binaries.- An improved visual and photographic orbit for Sirius.- Modeling the irradiated atmospheres of unevolved companions in precataclysmic binaries (PCB).- Seven years photopolarimetry of the AM Herculis system V834 Centauri.- HS 1136+6646: a hot DA0.5+K6V young post-CE pre-CV binary.- White dwarf colors in low accretion rate binaries.- Mass of white dwarf in T CrB and variability of accretion disk.- Similarity of emission lines of accreting white dwarfs and quasars.- Calculating spectra of accretion disks in AM CVn systems.- Constraints on AM CVn formation channels from modelling the composition of their discs.- 8. Cool White Dwarfs, WD Populations, Astrometry and Surveys.- The population of halo white dwarfs.- A distant white dwarf population in the 2QZ and Sloan surveys.- White dwarfs from the Hamburg Quasar Survey.- The Calán-ESO Survey: white dwarfs.- 3D kinematics of white dwarfs from the SPY project.- Search for ancient cool white dwarfs using GSC2 material.- Hidden sd/wd stars among the FAUST UV sources toward Ophiuchus.- Unusual white dwarfs found in the Sloan Digital Sky Survey.- Identification of cool white dwarfs in the NOAO Deep Wide-Field Survey.- White dwarf stars in the Sloan Digital Sky Survey: photometry.- White dwarfs in the Sloan Digital Sky Survey: spectroscopy.- The nature of high velocity white dwarfs.- Search for white dwarfs in the Capodimonte Deep Field.- A lower limit to the age of the galaxy from the white dwarf luminosity function.- The white dwarf population accessible to GAIA.- 9. Current and Future Space and Ground-Based Observing Facilities.- The APEX high resolution EUV spectroscopic explorer.- The World Space Observatory.- The VLT Survey Telescope: an efficient facility for the study of the WD luminosity function.- New wine, new vintages, and limoncello: Conference summary.- Author index.- Object index.