IAU

The A-Star Puzzle

IAU Symposium No. 224

Dedicated to
Vera L. Khokhlova (*1927 — †2003)
and
Horace W. Babcock (*1912 — †2003)
July 8-13, 2004, Poprad, Slovakia

Astronomical Institute

Proceedings
Basic Info	Programme	List of Participants	Poster	List of Contributions
Presentations
Symposium Photos
IAU Symposium No. 224, "A-Star Puzzle" LIST OF CONTRIBUTIONS AS ACCEPTED BY SOC A. NORMAL A-STARS TALKS AOR1 - S. J. ADELMAN: The physical properties of normal A-stars AOR2 - J. KUBAT, D. KORCAKOVA: Standard model atmospheres and non-LTE effects AT1 - J. KRTICKA, J. KUBAT: NLTE wind models of A supergiants AT3 - G. HILL, A. F. GULLIVER, S. J. ADELMAN: A spectral study of Vega: A rapidly-rotating pole-on star POSTERS AP1 - K. M. BISCHOF: A platform independent, parallel version of Atlas12 AP2 - R. MONIER, O. RICHARD: Abundance determinations for normal AF and AmFm stars in open clusters AP4 - S. ADELMAN, Z. LOPEZ-GARCIA, S. M. MALARODA, N. E. NUNEZ, M. G. GROSSO: Elemental abundance analyses with EBASIM spectrograph of the CASLEO observatory AP5 - D. KORCAKOVA, J. KUBAT, J. KRTICKA: Synthetic spectra of A supergiants AP6 - D. A. BOHLENDER, R. E. M. GRIFFIN: Vega and the local interstellar medium AP7 - A. TEKER, S. J. ADELMAN, D. KOCER: A preliminary analysis of the sharp-lined A3V star 95 Leo B. STELLAR EVOLUTION AND ROTATION; BINARITY TALKS BKNS - A. NOELS, J. MONTALBAN, C. MACERONI: Stellar evolution BIL1 - S. TALON: Mass loss, meridional circulation, and turbulence in contemporary stellar evolution models BIL2 - M. MARCONI, F. PALLA: Pre-Main-Sequence of A stars (exploring both the evolutionary and pulsational aspects) BIL3 - M. YILDIZ: Binarity as the tool for determining physical properties and evolutionary aspects of A-stars BT1 - M. YILDIZ: A new concept in stellar astrophysics based on internal rotation: effective mass and its place in the A- and B-star Puzzle BT2 - A. REINERS, F. ROYER: First signatures of strong differential rotation in A-type stars BT3 - R. ARLT: Magnetorotational instability in Ap star envelopes POSTERS BP1 - F. ROYER, J. ZOREC, A. E. GOMEZ: Rotational velocity distributions of A-type stars BP2 - J. SOUTHWORTH, B. SMALLEY, P. MAXTED: Accurate fundamental parameters of eclipsing binary stars BP3 - R. E. M. GRIFFIN: Omicron Leonis, an evolving Am binary BP4 - V. GOPKA, V. L. KHOKHLOVA, A. V. YUSHCHENKO, D. L. LAMBERT: Chemical composition of the components of unevolved SB2 systems with equal mass components C. CONVECTION IN STARS TALKS CKNS - F. KUPKA: Convection in stars CIL1 - B. SMALLEY: Observations of convection in A-stars CIL2 - B. FREYTAG: Numerical simulations of convection in A-stars CT1 - S. VAUCLAIR: Thermohaline convection and metallic fingers in polluted stars CT2 - M. K. BROWNING, A. S. BRUN, J. TOOMRE: Simulations of core convection and resulting dynamo action in rotating A-type stars CT3 - R. TRAMPEDACH: The Convection-zone of an A-star POSTERS CP1 - C. STUETZ, F. KUPKA: Stellar model atmospheres with emphasis on velocity dynamics CP2 - F. KUPKA, J. D. LANDSTREET, C. BILDFELL, A. FORD, J. SILAJ, A. TOWNSHEND: Observational signatures of atmospheric velocity fields in main sequence stars D. DIFFUSION AS THE MECHANISM FOR ELEMENT SEGREGATION TALKS DKNS - G. MICHAUD: Atomic diffusion in stellar surfaces and interiors DIL1 - G. ALECIAN: Diffusion in magnetic fields DIL2 - F. LEBLANC, D. MONIN: Modelling of stratified atmospheres of CP-stars DT1 - J. KRTICKA, J. KUBAT: Multicomponent stellar wind and chemical peculiarity in A stars DT2 - R. MONIER, O. RICHARD: Abundances of a and Am stars in open clusters as constraints to self consistent models including transport processes DT3 - O. RICHARD, S. TALON, G. MICHAUD: Surface abundances of Am stars as a constraint on rotational mixing POSTERS DP1 - T. RYABCHIKOVA, F. LEONE, O. KOCHUKHOV, S. BAGNULO: Element stratification in the atmospheres of two superficially non-magnetic Ap stars of Cr-type DP2 - G. ALECIAN, F. LEBLANC: Fast and easy computation of radiative accelerations in stellar interiors DP3 - J. F. ASHWELL, R. D. JEFFRIES, B. SMALLEY, C. P. DELYIANNIS, A. STEINHAUER, J. R. KING: The Li overabundance in J37: diffusion or accretion? E. MAGNETIC FIELDS TALKS EKNS - G. MATHYS: Stellar magnetic fields EIL1 - G. WADE: Stellar magnetic fields: the view from the ground and from space EIL2 - D. MOSS: Magnetic fields in A-stars: theoretical aspects ET1 - J. BRAITHWAITE, H. SPRUIT: The magnetic fields of A-stars and white dwarfs explained ET2 - T. LUEFTINGER, O. KOCHUKHOV, I. ILYIN, W. W. WEISS: Vertical and horizontal abundance structures and magnetic field geometry of the roAp star HD 24712 POSTERS EP1 - D. DRUIN, S. BAGNULO, J. D. LANDSTREET, E. MASON, D. MONIN, G. A. WADE: Seeking the progenitors of magnetic Ap stars: A search for magnetic fields in Herbig Ae/Be stars using the ESO VLT EP2 - N. JOHNSON, G. A. WADE, M. ABECASIS, M. AURIERE, S. BAGNULO, J.-F. DONATI, J. D. LANDSTREET, T. LUEFTINGER, S. MARSDEN, D. MOUILET, F. LIGNIERES, F. PALETOU, P. PETIT, J. SILVESTER, N. TOQUE: A spectrophotometric survey of the coolest Cp-stars EP3 - V. KHALACK: Magnetic field of an ellipsoidal star EP4 - I. I. ROMANYUK: Search for vertical structure of magnetic field in CP star alpha 2 CVn EP5 - E. A. SEMENKO: Search for magnetic field in CP stars using multiline approach EP6 - E. GERTH, Yu. V. GLAGOLEVSKIJ: The deforming effect of stellar magnetic fields on spectral line profiles EP7 - G. SCHOLZ, E. GERTH: Modelling of externally influenced magnetic fields in stars EP8 - Yu. V. GLAGOLEVSKIJ, E. GERTH: Modelling of several magnetic CP-stars: HD2453, HD12288, HD200311 EP9 - N. NESVACIL, S. HUBRIG, G. MATHYS: A search for magnetic field gradients in atmospheres of Ap stars EP10 - D. KUDRYAVTSEV, I. ROMANYUK, V. ELKIN: Search for new magnetic stars in stellar groups and open clusters EP11 - E. GERTH, Yu. V. GLAGOLEVSKIJ: The decentered magnetic dipole - a challenge for modelling EP12 - M. AURIERE, G. WADE: A survey of the weakest-field magnetic Ap stars: discovery of a threshold magnetic field strength EP13 - V. D. BYCHKOV, L. V. BYCHKOVA, J. MADEJ: Analysis of the magnetic phase curves of Ap-stars EP14 - V. D. BYCHKOV, L. V. BYCHKOVA, J. MADEJ: Averaged magnetic phase curves: Analysis of the catalogues EP15 - M. CHADID, G. A. WADE: Magnetic field in pulsating stars EP16 - M. Yu. SKULSKY, S. I. PLACHINDA: A 338 day period of magnetic field on beta Lyrae F. CHEMICALLY PECULIAR STARS TALKS FKNS - C. R. COWLEY, D. BORD: The CP phenomenon FIL1 - T. RYABCHIKOVA: Observations of magnetic CP-stars FIL2 - G. WAHLGREN: Observations of non-magnetic CP-stars FT1 - I. Kh. ILIEV, M. FENOVCIK, J. BUDAJ, J. ZVERKO, J. ZIZNOVSKY, I.BARZOVA: A search for SB2 systems among selected Am binaries FT2 - D. PYPER, S. J. ADELMAN: Variable light curves of magnetic CP stars FT3 - L. MASHONKINA, A. RYABTSEV, T. RYABCHIKOVA: NLTE ionization equilibrium of Nd II and Nd III in cool A and Ap stars POSTERS FP1 - I. ILIEV, I. STATEVA, E. PAUNZEN, I. BARZOVA: Diagnostics of lambda Bootis atmospheres using NaD, H-alpha and Paschen lines FP2 - Z. MIKULASEK, J. ZVERKO, J. ZIZNOVSKY, J. JANIK: Analysis of light curves of magnetic CP stars by advanced PCA methods FP3 - O. PINTADO, S. J. ADELMAN: Elemental abundances for HgMn stars observed with EBASIM echelle spectrograph from CASLEO FP4 - L. FRAGA, A. KANAAN: Looking for a definitive answer for age dependecy of Ap stars FP6 - G. WADE, S. BAGNULO: A Peculiar Newsletter: The official circular of the IAU working group on Ap and related stars FP7 - N. POLOSUKHINA, A. SHAVRINA, N. DRAKE, V. TSYMBAL, P. NORTH, V. KHALACK, J. ZVERKO, J. ZIZNOVSKY, Ya. PAVLENKO: The enigma of lithium in roAp-stars FP8 - I. H. CAY: Spectroscopic analysis of a metalic-line star 2 UMa (A2m) FP9 - I. BALEGA, Y. BALEGA, E. A. MALOGOLOVETS: Speckle interferometry of the binary system 53 Cam FP10 - H. CALISKAN, S. J. ADELMAN, A. F. GULLIVER: A spectroscopic atlas of the magnetic CP star HR8216 FP11 - N. DRAKE, N. S. POLOSUKHINA, R. de la REZA, M. HACK: Spotted Li abundance on the surface of the CP star HD3980 FP12 - F. FREMAT, P. LAMPENS, H. HENSBERGE: Chemical analysis of a spectroscopic triple system FP13 - J. KRTICKA, Z. MIKULASEK, J. KUBAT, J. ZVERKO, J. ZIZNOVSKY: The dependences of energy distribution on the abundances of A-star models FP14 - A. SHAVRINA, N. POLOSUKHINA, Y. PAVLENKO, S. KHAN, P. QUINET, V. KHALACK, A. YUSHCHENKO, V. GOPKA, N. MIKHAILITSKA, G. WADE: Lithium in the atmospheres of some sharp-lined roAp stars FP15 - E. PAUNZEN, U. HEITER: UV photometry of lambda Bootis stars and related objects FP16 - M. RODE-PAUNZEN, H. POEHNL, E. PAUNZEN, H. M. MAITZEN: Frequencies of CP2 stars in open clusters and galactic field FP17 - M. M. DWORETSKY: The helium abundances in HgMn and normal stars FP18 - V. GOPKA, A. YUSCHCHENKO, A. SHAVRINA, A. HATZES, D. MKRTICHIAN, S. ANDRIEVSKY, L. CHERNYSHEVA: On the radiateive shells in peculiar Main sequence stars: the phenomenon of Przybylski's star FP19 - H. BAUM, H. M. MAITZEN, M. NETOPIL, E. PAUNZEN, H. POEHNL, M. RODE-PAUNZEN, C. STUETZ: The Delta a research group FP20 - M. FENOVCIK, J. BUDAJ, I. ILIEV, M. T. RICHARDS, I. BARZOVA: Search for tidally driven abundance anomalies FP21 - N. NESVACIL, S. HUBRIG: Testing the presence of lithium on the surface of cool Ap stars FP22 - B. MICHAEL: New modelisation of oscillating Am stars G. PULSATING VARIABLES TALKS GKNS - L. BALONA: Pulsations of A-stars GIL1 - M. BREGER: Delta Scuti and gamma Doradus stars GIL2 - D. W. KURTZ: roAp-stars GT1 - K. ZWINTZ, M. MARCONI, W. W. WEISS: Pulsating pre-main sequence stars in young clusters GT2 - M. S. CUNHA, S. THEADO, S. VAUCLAIR: Excitation of oscillations in roAp stars: the role of chemical diffusion and winds GT4 - K. KOLENBERG, M. BREGER: New approaches to solve the old Blazhko puzzle in RR Lyrae stars POSTERS GP1 - J. D. RILEY, D. W. KURTZ, M. CUNHA: Long period oscillations in roAp stars GP2 - M. SACHKOV, T. RYABCHIKOVA, I. ILYIN, O. KOCHUKHOV, T. LUEFTINGER: Radial velocity pulsations in the atmosphere of HD 24712 GP3 - H. SAIO: The effect of a magnetic field on the radiative excitation and damping of high-order p-modes GP5 - W. ZIMA, K. KOLENBERG, M. BRIQUET, M. BREGER: Testing complementary spectroscopic mode identification methods: A hare-and-hound test of the pixel-by-pixel and the moment method GP6 - P. LENZ, M. BREGER: Period04 - A statistical package to extract multiple frequencies from imperfect data GP8 - P. REEGEN: Statistics of non-equidistantly sampled time series - estimating peak significance in the frequency domain GP9 - V. RIPEPI, S. BERNABEI, M. MARCONI, A. ARELLANO, A. BONANO A. FRASCA, SEUNG-LEE KIM, G. MIGNEMI, T. OSWALT, P. REEGEN, E. RODRIGUEZ, E. SCHISANO, X. J. XIAOJUN, K. ZWINTZ: Multisite observations of the PMS delta Scuti variable IP Per GP10 - I. SAVANOV, S. HUBRIG, G. MATHYS, A. RITTER, D. W. KURTZ: Search for magnetic pulsational variation in the star gamma Equ GP11 - V. D. BYCHKOV, L. V. BYCHKOVA, J. MADEJ: The rapid magnetic field variability in gamma Equilei GP12 - V. ANTOCI, M. BREGER: The delta Scuti star 44 Tauri: observations and analysis GP13 - S. BERNABEI, V. RIPEPI, M. MARCONI, L. TERRANEGRA, P. FERRARA, S. MARINONI, E. SCHISANO: Observation of new candidates for the PMS delta Scuti stars class GP14 - A. P. HATZES, D. E. MKRTICHIAN: The discovery of 16.21 min oscillations in beta CrB GP15 - V. ELKIN, D. W. KURTZ, G. MATHYS: A search for rapid radial velocity variation in the cool Ap star HD 965 GP16 - A. YUSHCHENKO, V. GOPKA, C. KIM, F. MUSAEV, Y. W. KANG: The chemical composition of Delta Sct and V2314 Oph GP17 - H. SHIBAHASHI, D. KURTZ, E. KAMBE, D. O'GOUGH: How to interpret line profile variations in roAp stars GP18 - P. LAMPENS, F. FREMAT: Pulsation of the delta Scuti multiple system DG Leo GP19 - D. E. MKRTICHIAN, A. P. HATZES: P-mode rich spectrum of HR1217- spectroscopic detection of new equi-spaced modes GP20 - O. KOCHUKHOV: Indirect imaging of stellar nonradial pulsations GP21 - Th. KALLINGER, I. ILIEV, H. LEHMANN, W. W. WEISS: The puzzling Maia candidate star alpha Draconis GP22 - J. DASZYNSKA-DASSZKIEWICZ, W. A. DZIEMBOWSKI, A. A. PAMYATNYKH, M. BREGER, W. ZIMA: Various applications of multi-color photometry and radial velocity data for multimode delta Scuti stars GP23 - T. BOEHM, C. CATALA, L. A. BALONA, B. CARTER: Spectroscopic multiperiodicity analysis of the pre-main sequence pulsator HD 104237 GP24 - A. P. HATZES, D. E. MKRTICHIAN: First spectroscopic detection of rapid pulsations in the Przybylski's star GP25 - P. J. AMADO: Pulsations in pre-main sequence stars. The case of HD 34282 H. EVOLVED A-TYPE STARS TALKS HIL1 - S. MOEHLER: Horizontal branch B- and A-type stars in globular clusters HIL2 - G. W. PRESTON: Blue metal-poor stars HIL3 - N. PRZYBILLA: A-supergiants POSTERS HP1 - B. ALBAYRAK, S. J. ADELMAN, J. P. AUFDENBERG, A. F. GULLIVER, O. I. PINTADO: A comprehensive study of the supergiant Rigel (B8 Iae:) HP2 - T. TANRIVERDI, S. J. ADELMAN, B. ALBAYRAK: The supergiant eta Leo (A0 Ib) HP3 - K. YUCE: Abundances in 4 Lacertae and nu Cephei HP4 - A. KAWKA, S. VENNES: Ap stars as progenitors of magnetic white dwarfs HP5 - J. BUDAJ, M. T. RICHARDS: Modeling the spectrum of TT Hya -- Algol binary with a disc HP6 - R. E. M. GRIFFIN: Evidence of episodic outburst in Deneb I. THE A-STAR LABORATORY TALKS IKNS - J. D. LANDSTREET: A stars as physics laboratories IIL1 - O. KOCHUKHOV: Diffusion and magnetic field effects on stellar surfaces IIL2 - E. PAUNZEN: The lambda Bootis stars IIL3 - H. SHIBAHASHI: A theorist's view of the A-star laboratory IT1 - S. VAUCLAIR, S. THEADO: Asteroseismic signatures of helium gradients in Main-sequence stars: Application to the roAp star HD 60435 POSTERS IP1 - C. J. CORBALLY, R. O. GRAY: Characteristics of our neighboring A-stars IP2 - S. KHAN, O. KOCHUKHOV, H. SHULYAK: Model atmospheres with magnetic line blanketing J. OBSERVATIONAL CHALLENGES OF A-TYPE STARS TALKS JKNS - S. BAGNULO: Observational challenges of A-type stars JIL1 - N. PISKUNOV: Prospects of small and large telescopes for the A-star research JIL2 - P. PADOVANI: A-stars and the Virtual Observatory POSTERS JP1 - I. BIKMAEV, N. SAKHIBULIN, F. MUSAEV, Z. ASLAN, T. RYABCHIKOVA: A high-resolution spectroscopy facilities at the 1.5-m Russian-Turkish telescope (RTT150) JP2 - S. J. ADELMAN, A. F. GULLIVER, B. SMALLEY: The ASTRA Spectrophotometer: A July 2004 Progress Report JP3 - R. MONIER, A. LEBRE: POLLUX: A database of high resolution echelle spectra of standard stars JP4 - A. BUDOVICOVA, J. KUBAT, P. HADRAVA, M. SLECHTA, D. KORCAKOVA, M. DOVCIAK, P. SKODA: Orbital solution of A-type binaries alpha Dra and Mizar using spectral disentangling JP6 - S. BAGNULO, E. JEHIN, C. MELO, C. LEDOUX, R. 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