Zobrazeno 1 - 10
of 222
pro vyhledávání: '"F Grundahl"'
Autor:
J S Thomsen, K Brogaard, T Arentoft, D Slumstrup, M N Lund, F Grundahl, A Miglio, J Jessen-Hansen, S Frandsen
Publikováno v:
Thomsen, J S, Brogaard, K, Arentoft, T, Slumstrup, D, Lund, M N, Grundahl, F, Miglio, A, Jessen-Hansen, J & Frandsen, S 2022, ' Establishing the accuracy of asteroseismic mass and radius estimates of giant stars-II. Revised stellar masses and radii for KIC 8430105 ', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 3, pp. 4187-4201 . https://doi.org/10.1093/mnras/stac2942
Asteroseismic scaling relations can provide high-precision measurements of mass and radius for red giant (RG) stars displaying solar-like oscillations. Their accuracy can be validated and potentially improved using independent and accurate observatio
Autor:
J. Šubjak, N. Lodieu, P. Kabáth, H. M. J. Boffin, G. Nowak, F. Grundahl, V. J. S. Béjar, M. R. Zapatero Osorio, V. Antoci
Publikováno v:
Šubjak, J, Lodieu, N, Kabáth, P, Boffin, H M J, Nowak, G, Grundahl, F, Béjar, V J S, Zapatero Osorio, M R & Antoci, V 2023, ' Search for planets around stars with wide brown dwarfs ', Astronomy and Astrophysics, vol. 671, A10 . https://doi.org/10.1051/0004-6361/202244238
Aims. The project aims to understand better the role of wide brown dwarf companions on planetary systems. Methods. We obtained high-resolution spectra of six bright stars with co-moving wide substellar companions with the SONG, CARMENES, and STELLA h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76e1f5d17213feea39a28c61b6a1896d
https://orbit.dtu.dk/en/publications/72356a31-5f0a-42ae-a860-7ae291934bac
https://orbit.dtu.dk/en/publications/72356a31-5f0a-42ae-a860-7ae291934bac
For existing and future projects dedicated to measuring precise radial velocities (RVs), we have created an open-source, flexible data reduction software to extract RVs from \'echelle spectra via the iodine (I$_2$) absorption cell method. The softwar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69acb7df3dc753d0ec4a30bb44e2ec8c
Publikováno v:
Cao, D, Gu, S, Grundahl, F & Palle, P L 2022, ' Magnetic activities on two single-lined RS Canum Venaticorum binaries IM Pegasi and σ Geminorum ', Monthly Notices of the Royal Astronomical Society, vol. 514, no. 3, pp. 4190-4204 . https://doi.org/10.1093/mnras/stac1576
We present the study on continuous high-resolution spectroscopic observations of two long-period single-lined RS Canum Venaticorum (RS CVn) binary stars IM Pegasi (IM Peg) and σ Geminorum (σ Gem), obtained with the Hertzsprung SONG telescope during
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d053c0573db310ff7f9767e4f51bc488
https://pure.au.dk/portal/da/publications/magnetic-activities-on-two-singlelined-rs-canum-venaticorum-binaries-im-pegasi-and--geminorum(c5b0d4c9-d4e6-4cd3-8638-a2b6fdd6b8a8).html
https://pure.au.dk/portal/da/publications/magnetic-activities-on-two-singlelined-rs-canum-venaticorum-binaries-im-pegasi-and--geminorum(c5b0d4c9-d4e6-4cd3-8638-a2b6fdd6b8a8).html
Autor:
K. Brogaard, T. Arentoft, D. Slumstrup, F. Grundahl, M. N. Lund, L. Arndt, S. Grund, J. Rudrasingam, A. Theil, K. Christensen, M. Sejersen, F. Vorgod, L. Salmonsen, L. Ørtoft Endelt, S. Dainese, S. Frandsen, A. Miglio, J. Tayar, D. Huber
Publikováno v:
Brogaard, K, Arentoft, T, Slumstrup, D, Grundahl, F, Lund, M N, Arndt, L, Grund, S, Rudrasingam, J, Theil, A, Christensen, K, Sejersen, M, Vorgod, F, Salmonsen, L, Endelt, L Ø, Dainese, S, Frandsen, S, Miglio, A, Tayar, J & Huber, D 2022, ' Establishing the accuracy of asteroseismic mass and radius estimates of giant stars : III. KIC 4054905, an eclipsing binary with two 10 Gyr thick disk RGB stars ', Astronomy and Astrophysics, vol. 668, A82 . https://doi.org/10.1051/0004-6361/202244345
Astronomy and astrophysics, Les Ulis : EDP Sciences, 2022, vol. 668, art. no. A82, p. [1-11]
Astronomy and astrophysics, Les Ulis : EDP Sciences, 2022, vol. 668, art. no. A82, p. [1-11]
Eclipsing binary stars with an oscillating giant component allow accurate stellar parameters to be derived and asteroseismic methods to be tested and calibrated. To this aim, suitable systems need to be firstly identified and secondly measured precis
Akademický článek
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Autor:
G. Tautvaišienė, Š. Mikolaitis, A. Drazdauskas, E. Stonkutė, R. Minkevičiūtė, E. Pakštienė, H. Kjeldsen, K. Brogaard, Y. Chorniy, C. von Essen, F. Grundahl, M. Ambrosch, V. Bagdonas, A. Sharma, C. Viscasillas Vázquez
Publikováno v:
Astrophysical journal supplement series, Bristol : IOP publishing Ltd, 2022, vol. 259, iss. 2, art. no. 45, p. [1-13]
Tautvaišiene, G, Mikolaitis, Drazdauskas, A, Stonkute, E, Minkevičiūte, R, Pakštiene, E, Kjeldsen, H, Brogaard, K, Chorniy, Y, Von Essen, C, Grundahl, F, Ambrosch, M, Bagdonas, V, Sharma, A & Vázquez, C V 2022, ' Chemical Composition of Bright Stars in the Northern Hemisphere : Star-Planet Connection ', Astrophysical Journal, Supplement Series, vol. 259, no. 2, 45 . https://doi.org/10.3847/1538-4365/ac50b5
Tautvaišiene, G, Mikolaitis, Drazdauskas, A, Stonkute, E, Minkevičiūte, R, Pakštiene, E, Kjeldsen, H, Brogaard, K, Chorniy, Y, Von Essen, C, Grundahl, F, Ambrosch, M, Bagdonas, V, Sharma, A & Vázquez, C V 2022, ' Chemical Composition of Bright Stars in the Northern Hemisphere : Star-Planet Connection ', Astrophysical Journal, Supplement Series, vol. 259, no. 2, 45 . https://doi.org/10.3847/1538-4365/ac50b5
In fulfilling the aims of the planetary and asteroseismic research missions, such as that of the NASA Transiting Exoplanet Survey Satellite (TESS) space telescope, accurate stellar atmospheric parameters and a detailed chemical composition are requir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34b7ec01ecd047038e3dd96aa52f7373
https://repository.vu.lt/VU:ELABAPDB128850002&prefLang=en_US
https://repository.vu.lt/VU:ELABAPDB128850002&prefLang=en_US
Autor:
Jerome A. Orosz, J. R. Larsen, Robert D. Mathieu, C. T. G. Sørensen, S. T. Bjørn, Dennis Stello, J. H. Jørgensen, Karsten Brogaard, Imants Platais, J. B. Thomsen, T. Arentoft, Jens Jessen-Hansen, D. Slumstrup, Soren Meibom, S. Frandsen, M. L. Jensen, F. Grundahl, Nils Ryde, Aaron M. Geller, Eric L. Sandquist, Hans Bruntt
Publikováno v:
Brogaard, K, Grundahl, F, Sandquist, E L, Slumstrup, D, Thomsen, J B, Jørgensen, J H, Larsen, J R, Bjørn, S T, Sørensen, C T G, Bruntt, H, Arentoft, T, Frandsen, S, Jessen-Hansen, J, Orosz, J A, Mathieu, R, Geller, A, Ryde, N, Stello, D, Meibom, S, Platais, I & Jensen, M L 2021, ' Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members : III. Constraints from a subgiant ', Astronomy and Astrophysics, vol. 649, A178 . https://doi.org/10.1051/0004-6361/202140911
Models of stellar structure and evolution can be constrained using accurate measurements of the parameters of eclipsing binary members of open clusters. Multiple binary stars provide the means to tighten the constraints and, in turn, to improve the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::538dbef74f0fd029f67d464ca31c41d0
https://pure.au.dk/portal/da/publications/age-and-helium-content-of-the-open-cluster-ngc-6791-from-multiple-eclipsing-binary-members(e4986b0a-6324-48bc-a4ab-a86d9233efc5).html
https://pure.au.dk/portal/da/publications/age-and-helium-content-of-the-open-cluster-ngc-6791-from-multiple-eclipsing-binary-members(e4986b0a-6324-48bc-a4ab-a86d9233efc5).html
Autor:
C. Viscasillas Vázquez, C. von Essen, K. Brogaard, R. Minkevičiūtė, Gražina Tautvaišienė, F. Grundahl, Arnas Drazdauskas, Šarūnas Mikolaitis, Edita Stonkutė, H. Kjeldsen, V. Bagdonas, E. Pakštienė
Publikováno v:
Tautvaišienė, G, Mikolaitis, S, Drazdauskas, A, Stonkutė, E, Minkevičiūtė, R, Kjeldsen, H, Brogaard, K, Von Essen, C, Grundahl, F, Pakštienė, E, Bagdonas, V & Vázquez, C V 2020, ' Chemical Composition of Bright Stars in the Continuous Viewing Zone of the TESS Space Mission ', Astrophysical Journal, Supplement Series, vol. 248, no. 1, 19 . https://doi.org/10.3847/1538-4365/ab8b67
Accurate atmospheric parameters and chemical composition of stars play a vital role in characterizing physical parameters of exoplanetary systems and understanding of their formation. A full asteroseismic characterization of a star is also possible i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27ae960ad7890f19a660d85770033a7e
Akademický článek
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