Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Luis A. Balona"'
Autor:
Luis A. Balona
Publikováno v:
The Open Journal of Astrophysics, Vol 7 (2024)
Inspection of the periodograms of TESS delta Scuti stars indicates that there is little, if any, similarity between the frequencies of stars in the same region of the H-R diagram. This is difficult to understand because pulsation models predict that
Externí odkaz:
https://doaj.org/article/03f39a1406c44408a8f63c978fb00795
Autor:
Luis A. Balona
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
About 22,000 Kepler stars, 7,000 K2 stars, and nearly 60,000 TESS stars from sectors 1–24 have been classified according to variability type. A large proportion of stars of all spectral types appear to have periods in their light curves consistent
Externí odkaz:
https://doaj.org/article/1b389247928d4b65a9ee3b1ea17a00a6
Autor:
Luis A. Balona
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 7 (2020)
Kepler short-cadence photometry of 2,347 stars with effective temperatures in the range 6,000–10,000 K was used to search for the presence of solar-like oscillations. The aim is to establish the location of the hot end of the stochastic convective
Externí odkaz:
https://doaj.org/article/7b109e35ecf2439b8c6517f04c6ad306
Autor:
Luis A. Balona
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
A new perspective of pulsation in stars within the δ Scuti instability strip has recently emerged as a result of Kepler observations. The majority of stars within the instability strip do not pulsate and practically all δ Scuti stars contain low fr
Externí odkaz:
https://doaj.org/article/ba2d9a5feaba4c76af4bf6b385bcf66d
Autor:
Dogus Ozuyar, Luis A. Balona
In this work, we study the general characteristics of Be star light curves from TESS sectors 1-26 in the light of a model we call the "impulsive magnetic rotator". It is found that 73 percent of 441 classical Be stars are short-period variables. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1f57a8793691e6be51ead760107019b
http://arxiv.org/abs/2008.06288
http://arxiv.org/abs/2008.06288
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 466:1290-1329
A spectroscopic and photometric analysis has been carried out for thirty-two candidate SX_Phe variable blue straggler stars in the Kepler-field (Balona & Nemec 2012). Radial velocities (RVs), space motions (U,V,W), projected rotation velocities (v si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f65c295c1835f824eb82a1b875d9c0d
https://doi.org/10.1093/mnras/stw3072
https://doi.org/10.1093/mnras/stw3072
Autor:
Daniel J. Stevens, Jonathan Labadie-Bartz, Joshua Pepper, Keivan G. Stassun, Michael B. Lund, Rudolf B. Kuhn, David J. James, Peter De Cat, Joseph E. Rodriguez, Luis A. Balona, Robert J. Siverd, Gerald Handler
Publikováno v:
The Astronomical Journal. 160:32
We present the results of a search for Galactic β Cephei stars, which are massive pulsating stars with both pressure modes and mixed modes. Thus, these stars can serve as benchmarks for seismological studies of the interiors of massive stars. We con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4db702c0b4026df5443a4b5b1c07e23
https://doi.org/10.3847/1538-3881/ab952c
https://doi.org/10.3847/1538-3881/ab952c
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 451:1445-1459
We examine 4 yr almost continuous Kepler photometry of 115 B stars. We find that the light curves of 39 per cent of these stars can be described by a low-frequency sinusoid and its harmonic, usually with variable amplitude, which we interpret as rota
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1bb992b5007936e15a5f2e32f23acbdd
https://doi.org/10.1093/mnras/stv1017
https://doi.org/10.1093/mnras/stv1017
Autor:
Luis A. Balona
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 447:2714-2725
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecf09fdf2ae317efd4d42fe356c8072e
https://doi.org/10.1093/mnras/stu2651
https://doi.org/10.1093/mnras/stu2651
Autor:
Laurent Eyer, A. Bruch, Bart Willems, Luis A. Balona, Chris Koen, Encarni Romero-Colmenero, Gerald Handler, David James, A. A. Pamyatnykh, T. Maas, R. R. Shobbrook
We have discovered both intermediate-order gravity mode and low-order pressure mode pulsation in the same star, HD 209295. It is therefore both a Gamma Doradus and a Delta Scuti star, which makes it the first pulsating star to be a member of two clas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d29d00e6f32f46402c3530436c1639d8
http://doc.rero.ch/record/304163/files/333-2-262.pdf
http://doc.rero.ch/record/304163/files/333-2-262.pdf