Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Fiorella Castelli"'
Autor:
Ewa Niemczura, Stefan Hümmerich, Fiorella Castelli, Ernst Paunzen, Klaus Bernhard, Franz-Josef Hambsch, Krzysztof Hełminiak
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
Abstract HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interp
Externí odkaz:
https://doaj.org/article/667dc2bbee254db383324e8ea05d2b72
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
We investigate the stellar atmospheres of the two components of the Herbig Ae SB2 system AK Sco to determine the elements present in the stars and their abundance. Equal stellar parameters T_eff = 6500K and log g = 4.5 were used for both stars. We st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::120b061785e18b3677c9f1b08a5b6ae9
https://doi.org/10.1093/mnras/stz3015
https://doi.org/10.1093/mnras/stz3015
Autor:
D. A. García-Hernández, Steven R. Majewski, Keivan G. Stassun, Swetlana Hubrig, S. Drew Chojnowski, David G. Whelan, Olga Zamora, Christian Nitschelm, Sten Hasselquist, Fiorella Castelli
We report on magnetic field measurements of 157 chemically peculiar A/B stars (Ap/Bp) based on resolved, magnetically split absorption lines present in $H$-band spectra provided by the Sloan Digital Sky Survey (SDSS)/Apache Point Observatory Galactic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::051b8324abb2174acd56d294b58a1a12
http://arxiv.org/abs/1903.01514
http://arxiv.org/abs/1903.01514
Autor:
A. J. Gallagher, B. Freytag, Derek Homeier, Matthias Steffen, Bertrand Plez, Arunas Kucinskas, D. Prakapavičius, R. Cayrel, Fiorella Castelli, Elisabetta Caffau, H.-G. Ludwig, Piercarlo Bonifacio
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2018, 611, ⟨10.1051/0004-6361/201732232⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 611, ⟨10.1051/0004-6361/201732232⟩
Astronomy and Astrophysics-A&A, 2018, 611, ⟨10.1051/0004-6361/201732232⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 611, ⟨10.1051/0004-6361/201732232⟩
The atmospheres of cool stars are temporally and spatially inhomogeneous due to the effects of convection.The influence of this inhomogeneity, referred to as granulation, on colours has never been investigated over a large range of effective temperat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::706c63ebb771d35aa420b299cd490f41
http://arxiv.org/abs/1712.00024
http://arxiv.org/abs/1712.00024
The sharp-line spectrum of the Bp star HR 6000 has peculiarities that distinguish it from those of the HgMn stars with which it is sometimes associated. The position of the star close to the center of the Lupus 3 molecular cloud, whose estimated age
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12322bcfeae566305cd7154ac6b1781b
http://hdl.handle.net/20.500.11769/21799
http://hdl.handle.net/20.500.11769/21799
Autor:
Ernst Paunzen, Franz-Josef Hambsch, Stefan Hümmerich, Ewa Niemczura, Klaus Bernhard, Fiorella Castelli, Krzysztof Hełminiak
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
Scientific Reports
Scientific Reports
HD66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0349ac3878b998d9a97399969900320
Autor:
Maryline Briquet, Markus Schöller, Fiorella Castelli, J. F. González, Swetlana Hubrig, Heidi Korhonen, T. A. Carroll, Ilya Ilyin, Natalia A. Drake
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
The aim of this study is to carry out an abundance determination, to search for spectral variability and for the presence of a weak magnetic field in the typical PGa star HD19400. High-resolution, high signal-to-noise HARPS spectropolarimetric observ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba4e9b10b4c6ca591b8fc67b78ea6f71
https://doi.org/10.1093/mnras/stu1122
https://doi.org/10.1093/mnras/stu1122
Autor:
D. A. García-Hernández, D. G. Whelan, Keivan G. Stassun, S. Drew Chojnowski, Steven R. Majewski, Fiorella Castelli, Olga Zamora, Christian Nitschelm, Sten Hasselquist, Swetlana Hubrig
Publikováno v:
The Astrophysical Journal. 876:L34
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c9dd6c02021c86df8f998ce4edefcfb
https://doi.org/10.3847/2041-8213/ab1e53
https://doi.org/10.3847/2041-8213/ab1e53
Publikováno v:
Proceedings of the International Astronomical Union. 14:133-133
AK Sco is an SB2 system formed by two nearly identical Herbig Ae stars, with Teff = 6500K and log g = 4.5, surrounded by a circumbinary disk. This actively accreting system is of special interest among the pre-main-sequence binaries because of its pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe5a688f126cb28b2de591bfbf86daaa
https://doi.org/10.1017/s1743921319003831
https://doi.org/10.1017/s1743921319003831
Autor:
T. A. Carroll, Gerd Weigelt, Heidi Korhonen, Fiorella Castelli, Markus Schöller, S. P. Järvinen, Swetlana Hubrig, Monika G. Petr-Gotzens, Christian A. Hummel, M. A. Pogodin, I. V. Ilyin, Natalia A. Drake
Publikováno v:
The Astrophysical Journal. 858:L18
We report the detection of weak mean longitudinal magnetic fields in the Herbig Ae double-lined spectroscopic binary AK Sco and in the presumed spectroscopic Herbig Ae binary HD95881 using observations with the High Accuracy Radial velocity Planet Se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8c8ed8227b00ee16341161057f0a771
https://doi.org/10.3847/2041-8213/aac0fa
https://doi.org/10.3847/2041-8213/aac0fa