Zobrazeno 1 - 10
of 412
pro vyhledávání: '"D. A. Kurtz"'
Autor:
Richard Monier, E. Niemczura, D. W. Kurtz, S. Rappaport, D. M. Bowman, Simon J. Murphy, Yveline Lebreton, Remko Stuik, Morgan Deal, Thibault Merle, T. Kılıçoğlu, M. Gebran, Ewen Le Ster
Publikováno v:
The Astronomical Journal, Vol 166, Iss 2, p 54 (2023)
We report on a detailed abundance study of six bright, mostly southern, slowly rotating late B-stars: HD 1279 (B8III), HD 99803 (B9V), HD 123445 (B9V), HD 147550 (B9V), HD 171961 (B8III), and HD 202671 (B5II/III), hitherto reported as normal stars. W
Externí odkaz:
https://doaj.org/article/92d1b0681b50497681ece8c7ae23af1c
Several studies have shown that a number of stars pulsating in p modes lie between the $\beta$ Cep and $\delta$ Sct instability strips in the Hertzsprung-Russell (HR) Diagram. At present, there is no certain understanding of how p~modes can be excite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2951f4ce970a944d5c340399e41048ec
http://arxiv.org/abs/2303.11358
http://arxiv.org/abs/2303.11358
The rotation periods of the magnetic Ap stars span five to six orders of magnitude. Period differentiation must have taken place at the pre-main sequence stage, but the physical processes that lead to it remain elusive. The study of Ap stars that hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41cd2f80676680d2714060de24ec6759
Autor:
Timothy R. Bedding, Daniel Luke Holdsworth, Benjamin J. Fulton, Simon J. Murphy, Daniel Huber, Margarida S. Cunha, Daniel R. Hey, D. W. Kurtz, Andrew W. Howard
Publikováno v:
Hey, D R, Holdsworth, D L, Bedding, T R, Murphy, S J, Cunha, M S, Kurtz, D W, Huber, D, Fulton, B & Howard, A W 2019, ' Six new rapidly oscillating Ap stars in the Kepler long-cadence data using super-Nyquist asteroseismology ', Monthly Notices of the Royal Astronomical Society, vol. 488, no. 1, pp. 18-36 . https://doi.org/10.1093/mnras/stz1633
We perform a search for rapidly oscillating Ap stars in the Kepler long-cadence data, where true oscillations above the Nyquist limit of 283.21 {\mu}Hz can be reliably distinguished from aliases as a consequence of the barycentric time corrections ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb4151f3d2d7c9545daf66cacd0f9825
https://doi.org/10.1093/mnras/stz1633
https://doi.org/10.1093/mnras/stz1633
Autor:
Aliz Derekas, N. Hatamkhani, D. W. Kurtz, T. Richey-Yowell, J. Pascual-Granado, P. Lampens, K. R. Pollard, Roland Vanderspek, A. García Hernández, Joyce A. Guzik, Ádám Sódor, Fangfei Shi, Catherine Lovekin, Zs. Bognár, Simon J. Murphy, Oleh Kobzar, Victoria Antoci, Viktor Khalack, Barry Smalley, A. Samadi-Ghadim, Dominic M. Bowman, A. David-Uraz, Derek Buzasi, E. Brunsden, M. Lares-Martiz, Oleg Kochukhov, Ivanka Stateva, T. Z. Yang, E. Niemczura, Dogus Ozuyar, Rasmus Handberg, P. Mikołajczyk, A. Ramón-Ballesta, T. S. Lambert, L. Fox-Machado, J. Sikora, P. Quitral-Manosalva, David Mkrtichian, Richard Monier, M. S. Cunha, Róbert Szabó, Daniel R. Hey, Daniel Luke Holdsworth, Ernst Paunzen
Publikováno v:
Digibug. Repositorio Institucional de la Universidad de Granada
instname
Digital.CSIC. Repositorio Institucional del CSIC
Holdsworth, D L, Cunha, M S, Kurtz, D W, Antoci, V, Hey, D R, Bowman, D M, Kobzar, O, Buzasi, D L, Kochukhov, O, Niemczura, E, Ozuyar, D, Shi, F, Szabó, R, Samadi-Ghadim, A, Bognár, Z, Fox-Machado, L, Khalack, V, Lares-Martiz, M, Lovekin, C C, Mikołajczyk, P, Mkrtichian, D, Pascual-Granado, J, Paunzen, E, Richey-Yowell, T, Sódor, Á, Sikora, J, Yang, T Z, Brunsden, E, David-Uraz, A, Derekas, A, Hernández, A G, Guzik, J A, Hatamkhani, N, Handberg, R, Lambert, T S, Lampens, P, Murphy, S J, Monier, R, Pollard, K R, Quitral-Manosalva, P, Ramón-Ballesta, A, Smalley, B, Stateva, I & Vanderspek, R 2021, ' TESS Cycle 1 observations of roAp stars with 2-min cadence data ', Monthly Notices of the Royal Astronomical Society, vol. 506, pp. 1073–1110 . https://doi.org/10.1093/mnras/stab1578
instname
Digital.CSIC. Repositorio Institucional del CSIC
Holdsworth, D L, Cunha, M S, Kurtz, D W, Antoci, V, Hey, D R, Bowman, D M, Kobzar, O, Buzasi, D L, Kochukhov, O, Niemczura, E, Ozuyar, D, Shi, F, Szabó, R, Samadi-Ghadim, A, Bognár, Z, Fox-Machado, L, Khalack, V, Lares-Martiz, M, Lovekin, C C, Mikołajczyk, P, Mkrtichian, D, Pascual-Granado, J, Paunzen, E, Richey-Yowell, T, Sódor, Á, Sikora, J, Yang, T Z, Brunsden, E, David-Uraz, A, Derekas, A, Hernández, A G, Guzik, J A, Hatamkhani, N, Handberg, R, Lambert, T S, Lampens, P, Murphy, S J, Monier, R, Pollard, K R, Quitral-Manosalva, P, Ramón-Ballesta, A, Smalley, B, Stateva, I & Vanderspek, R 2021, ' TESS Cycle 1 observations of roAp stars with 2-min cadence data ', Monthly Notices of the Royal Astronomical Society, vol. 506, pp. 1073–1110 . https://doi.org/10.1093/mnras/stab1578
We thank the anonymous referee for a careful reading of the manuscript. DLH acknowledges financial support from the Science and Technology Facilities Council (STFC) via grant ST/M000877/1. MSC acknowledges the support by FCT/MCTES through the researc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14c04df5a1f169bc9b2c3e777df87226
http://hdl.handle.net/10481/71174
http://hdl.handle.net/10481/71174
Autor:
Daniel Luke Holdsworth, Dominic M. Bowman, Andrew Tkachenko, J. Hermans, Barry Smalley, D. W. Kurtz, Jadwiga Daszyńska-Daszkiewicz, Simon J. Murphy
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Bowman, D M, Hermans, J, Daszyńska-Daszkiewicz, J, Holdsworth, D L, Tkachenko, A, Murphy, S J, Smalley, B & Kurtz, D W 2021, ' KIC 5950759 : A high-Amplitude δsct star with amplitude and frequency modulation near the terminal age main sequence ', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 3, pp. 4039-4053 . https://doi.org/10.1093/mnras/stab1124
Bowman, D M, Hermans, J, Daszyńska-Daszkiewicz, J, Holdsworth, D L, Tkachenko, A, Murphy, S J, Smalley, B & Kurtz, D W 2021, ' KIC 5950759 : A high-Amplitude δsct star with amplitude and frequency modulation near the terminal age main sequence ', Monthly Notices of the Royal Astronomical Society, vol. 504, no. 3, pp. 4039-4053 . https://doi.org/10.1093/mnras/stab1124
Amongst the intermediate mass pulsating stars known as $\delta$ Sct stars is a subset of high-amplitude and predominantly radial-mode pulsators known as high-amplitude $\delta$ Sct (HADS) stars. From more than 2000 $\delta$ Sct stars observed by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2b6a33d75c482e62de10c95591736e4
Autor:
Masao Takata, D. W. Kurtz, Daniel R. Hey, Hiromoto Shibahashi, Masahide Takada-Hidai, Hideyuki Saio, Simon J. Murphy
Publikováno v:
Murphy, S J, Saio, H, Takada-Hidai, M, Kurtz, D W, Shibahashi, H, Takata, M & Hey, D R 2020, ' On the first δSct-roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars ', Monthly Notices of the Royal Astronomical Society, vol. 498, no. 3, pp. 4272-4286 . https://doi.org/10.1093/mnras/staa2667
Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC 11296437 is the first star to show both. We obtained and analysed a Subaru spec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::864395f7abbaf0f5a3c4450a17c7691e
https://pure.au.dk/portal/da/publications/on-the-first-sctroap-hybrid-pulsator-and-the-stability-of-p-and-g-modes-in-chemically-peculiar-af-stars(38efda89-e0f4-4e5a-9d33-e06c00676ea2).html
https://pure.au.dk/portal/da/publications/on-the-first-sctroap-hybrid-pulsator-and-the-stability-of-p-and-g-modes-in-chemically-peculiar-af-stars(38efda89-e0f4-4e5a-9d33-e06c00676ea2).html
KIC 10685175 (TIC 264509538) was discovered to be a rapidly oscillating Ap star from Kepler long-cadence data using super-Nyquist frequency analysis. It was reobserved by the Transiting Exoplanet Survey Satellite (TESS) with 2 minute cadence data in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52ce4bc39c0d499680e8b8ac3e13a3ec
A new class of pulsating binary stars was recently discovered, whose pulsation amplitudes are strongly modulated with orbital phase. Stars in close binaries are tidally distorted, so we examine how a star's tidally induced asphericity affects its osc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bd912e078b800aec99a34c64a177cb4
http://arxiv.org/abs/2008.02836
http://arxiv.org/abs/2008.02836
The TESS space mission is producing superb data for asteroseismology, eclipsing binary stars, gyrochronology, and other fields of stellar astronomy where the data are variable light curves. We show that TESS data are excellent for astrophysical infer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59071cec5b4aa0b7ad2aa18126a77b7c
http://arxiv.org/abs/2003.14144
http://arxiv.org/abs/2003.14144