Results 1 to 10 of about 1,181,220 (330)

The blue-edge problem of the V1093 Her instability strip revisited using evolutionary models with atomic diffusion [PDF]

, 2014
We have computed a new grid of evolutionary subdwarf B star (sdB) models from the start of central He burning, taking into account atomic diffusion due to radiative levitation, gravitational settling, concentration diffusion, and thermal diffusion.
Aerts, C., Bloemen, S., Degroote, P., Dupret, M. A., Hu, Haili, Müller-Ringat, E., Rauch, T., Østensen, R. H.   +7 more
core   +8 more sources

Comparative seismology of pre- and main sequence stars in the instability strip [PDF]

, 2001
Pulsational properties of 1.8 M$_{\odot}$ stellar models covering the latest stages of contraction toward the main sequence up to early hydrogen burning phases are investigated by means of linear nonadiabatic analyses.
Baglin, Annie, Catala, Claude, Goupil, MarieJo, Lebreton, Yveline, Suran, Marian   +4 more
core   +6 more sources

A search for non-pulsating, chemically normal stars in the Scuti instability strip using Kepler data [PDF]

, 2014
We identify stars in the δ Sct instability strip that do not pulsate in p modes at the 50-μmag limit, using Kepler data. Spectral classification and abundance analyses from high-resolution spectroscopy allow us to identify chemically peculiar stars, in ...
Abt, Abt, Aerts, Baglin, Balona, Balona, Barry, Barry Smalley, Bedding, Bergeron, Bergeron, Breger, Brickhill, Brown, Buchler, Cantiello, Carquillat, Casagrande, Casey, Castelli, Catanzaro, Debernardi, Debernardi, Donald W. Kurtz, Droege, Dupret, Dupret, Dziembowski, Evans, Ewa Niemczura, Faigler, Fuller, Fuller, Gaulme, Gebran, Gianninas, Gianninas, Gray, Gray, Grigahcène, Grigahcène, Guzik, Guzik, Hambleton, Hambleton, Hareter, Hoeg, Holdsworth, Huber, Kamp, Kepler, King, Kotak, Kurtz, Kurtz, Kurtz, Kurucz, Lenz, Lignières, Monet, Mukadam, Murphy, Murphy, Murphy, Niemczura, Peterson, Pinsonneault, Raskin, Richer, Royer, Rufener, Saio, Simon, Simon J. Murphy, Skrutskie, Slettebak, Slettebak, Smalley, Smalley, Smith, Springer, Stibbs, Stumpe, Tal-Or, Thompson, Théado, Timothy R. Bedding, Tkachenko, Turcotte, Turcotte, Uytterhoeven, Van Reeth, Venn, Waelkens, Welsh, Zwintz   +95 more
core   +7 more sources

The GW Vir Instability Strip in Light of New Observations of PG 1159 Stars: Discovery of Pulsations in the Central Star of A72 and Variability of RX J0122.9–7521 [PDF]

Astrophysical Journal Supplement Series, 2023
We present the results of new time-series photometric observations of 29 pre–white dwarf stars of PG 1159 spectral type, carried out in the years 2014–2022.
Paulina Sowicka, G. Handler, David Jones, J. A. R. Caldwell, F. van Wyk, E. Paunzen, K. Bąkowska, L. Peralta de Arriba, L. Suárez-Andrés, K. Werner, Marie Karjalainen, Daniel L. Holdsworth   +11 more
openalex   +2 more sources

Towards an Empirical Determination of the ZZ Ceti Instability Strip [PDF]

, 2005
We present atmospheric parameters for a large sample of DA white dwarfs that are known to be photometrically constant. For each star, we determine the effective temperature and surface gravity by comparing high signal-to-noise ratio optical spectra to ...
A. Gianninas, Fontaine G., G. Fontaine, Giovannini O., Kepler S. O., P. Bergeron, Weidemann V.   +6 more
core   +5 more sources

The ZZ Ceti Instability Strip for the Most Massive White Dwarf Pulsators

The Astrophysical Journal
We present time-series photometry of 31 massive DA white dwarfs with M  ≳ 0.9 M _⊙ within the ZZ Ceti instability strip from the Montreal White Dwarf Database 100 pc sample.
Gracyn Jewett, Mukremin Kilic, Adam Moss, Alejandro H. Córsico, Matthew J. Green, Murat Uzundag, Pierre Bergeron, Warren R. Brown, Francisco C. De Gerónimo, Alberto Rebassa-Mansergas, Alex J. Brown, Vikram S. Dhillon, Stuart Littlefair   +12 more
doaj   +2 more sources

Outcomes after thumb carpometacarpal joint stabilization with an abductor pollicis longus tendon strip for the treatment of chronic instability [PDF]

Archives of Orthopaedic and Trauma Surgery, 2019
Introduction Instabilities of the thumb carpometacarpal (CMC) joint, caused by idiopathic ligamentous hyperlaxity, trauma or other conditions may lead to pain, functional impairment and eventually osteoarthritis. Several techniques have been described to
Alexandra Stauffer, Yvonne Schwarz, Marion Uranyi, Florian Schachinger, Werner Girsch, Rudolf Ganger, Sebastian Farr   +6 more
openalex   +2 more sources

The theoretical instability strip of M dwarf stars [PDF]

, 2013
The overstability of the fundamental radial mode in M dwarf models was theoretically predicted by Rodr\'iguez-L\'opez et al. (2012). The periods were found to be in the ranges ~25-40 min and ~4-8 h, depending on stellar age and excitation mechanism.
Amado, P. J., MacDonald, J., Moya, A., Mullan, D., Rodríguez-López, C.   +4 more
core   +2 more sources

A SEARCH FOR MASS LOSS ON THE CEPHEID INSTABILITY STRIP USING H i 21 cm LINE OBSERVATIONS [PDF]

, 2016
We present the results of a search for H i 21 cm line emission from the circumstellar environments of four Galactic Cepheids (RS Pup, X Cyg, ζ Gem, and T Mon) based on observations with the Karl G. Jansky Very Large Array.
Lynn D. Matthews, M. Marengo, Nancy Remage Evans   +2 more
openalex   +3 more sources

Turbulent convection and pulsation stability of stars – II. Theoretical instability strip forδScuti andγDoradus stars [PDF]

, 2016
By using a non-local and time-dependent convection theory, we have calculated radial and low-degree non-radial oscillations for stellar evolutionary models with M = 1.4-3.0 M-circle dot. The results of our study predict theoretical instability strips for
Dongbin Xiong, Licai Deng, C. Zhang, Ke Wang   +3 more
openalex   +3 more sources