Zobrazeno 1 - 10
of 55
pro vyhledávání: '"R. H. Østensen"'
Autor:
A. S. Baran, V. Van Grootel, R. H. Østensen, H. L. Worters, S. K. Sahoo, S. Sanjayan, S. Charpinet, P. Nemeth, J. H. Telting, D. Kilkenny
We present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bfda57eb7b4d86804a3e2ad708824dc
Autor:
Francisco Molina, Maja Vučković, R. H. Østensen, Andrew Tkachenko, J. Vos, P. Nemeth, H. Van Winckel
There are 23 long-period binary systems discovered to date that contain a B-type hot subdwarf(sdB) whose orbital parameters have been fully solved. They evolve into O-type subdwarfs (sdO) once the helium burning transitions from the core to the He sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e41e4952083e8573ecd171f78048f655
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 427:1245-1251
We report the discovery of two new pulsating subdwarf B (sdB) stars in the open cluster NGC 6791 using data from the Kepler spacecraft. Three sdB stars were observed for one month in short-cadence (1 min) mode and three months in long-cadence (30 min
Autor:
T. Kuutma, T. Pursimo, Joshua W. Kern, M. Saajasto, L. Rowe, R. H. Østensen, Steven Bloemen, Jussi Harmanen, Pere Blay, D. Slumstrup, J. H. Telting, A. J. Winans, Michael D. Reed, H. M. Foster, Louise D. Nielsen, Andrzej S. Baran
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 458, 1417-1426
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Reed, M D, Baran, A S, Østensen, R H, Telting, J H, Kern, J W, Bloemen, S, Blay, P, Pursimo, T, Kuutma, T, Slumstrup, D, Saajasto, M, Nielsen, L D, Harmanen, J, Winans, A J, Foster, H M & Rowe, L 2016, ' A pulsation analysis of K2 observations of the subdwarf B star PG 1142-037 during Campaign 1: A subsynchronously rotating ellipsoidal variable ', Royal Astronomical Society. Monthly Notices, bind 458, nr. 2, s. 1417-1426 . https://doi.org/10.1093/mnras/stw348
Monthly Notices of the Royal Astronomical Society, 458, 2, pp. 1417-1426
BASE-Bielefeld Academic Search Engine
Reed, M D, Baran, A S, Østensen, R H, Telting, J H, Kern, J W, Bloemen, S, Blay, P, Pursimo, T, Kuutma, T, Slumstrup, D, Saajasto, M, Nielsen, L D, Harmanen, J, Winans, A J, Foster, H M & Rowe, L 2016, ' A pulsation analysis of K2 observations of the subdwarf B star PG 1142-037 during Campaign 1: A subsynchronously rotating ellipsoidal variable ', Royal Astronomical Society. Monthly Notices, bind 458, nr. 2, s. 1417-1426 . https://doi.org/10.1093/mnras/stw348
Monthly Notices of the Royal Astronomical Society, 458, 2, pp. 1417-1426
We report a new subdwarf B (sdB) pulsator, PG1142-037, discovered during the first full-length campaign of K2, the two-gyro mission of the Kepler space telescope. Fourteen periodicities have been detected between 0.9 and 2.5 hours with amplitudes bel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7f302d3241017fb9db13959819f2f49
http://hdl.handle.net/10138/184735
http://hdl.handle.net/10138/184735
Autor:
V. Schaffenroth, Stephan Geier, Nicole Reindl, R. H. Østensen, Steven Bloemen, Thomas Kupfer, Ulrich Heber, Brad N. Barlow
Publikováno v:
Astronomy & Astrophysics, 587, 1-11
Astronomy & Astrophysics, 587, March, pp. 1-11
Astronomy & Astrophysics, 587, March, pp. 1-11
In the course of the MUCHFUSS project we recently discovered four radial velocity (RV) variable, hot (T_(eff)≈ 80 000−110 000 K) post-asymptotic giant branch (AGB) stars. Among them, we found the first known RV variable O(He) star, the only secon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::006d842dcf9c68ccea6bed3ab3705546
http://hdl.handle.net/2066/157941
http://hdl.handle.net/2066/157941
Publikováno v:
Astronomy & Astrophysics, 586, 1-12
Astronomy & Astrophysics, 586, pp. 1-12
Astronomy & Astrophysics, 586, pp. 1-12
Irradiation effects in close binaries are crucial for a reliable determination of system parameters and understanding the close binary evolution. We study irradiated light originating from the low mass component of an eclipsing system comprising a ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b4b0c1f92a74bc749278b2ad22fb21a
http://hdl.handle.net/2066/155870
http://hdl.handle.net/2066/155870
Autor:
Haili Hu, B. D. Clarke, Andrzej S. Baran, Dennis Stello, E. Pakstiene, Pieter Degroote, Steven Bloemen, Steven D. Kawaler, R. H. Østensen, J. H. Telting, Valérie Van Grootel, Roberto Silvotti, Susan E. Thompson, Simon J. O'Toole, J. Van Cleve, Michael D. Reed
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 424:2686-2700
We present our analyses of 15 months of Kepler data on KIC 10139564. We detected 57 periodicities with a variety of properties not previously observed all together in one pulsating subdwarf B star. Ten of the periodicities were found in the low-frequ
Autor:
Robin Lombaert, K. Exter, Chris M. Copperwheat, T. R. Marsh, Elmé Breedt, Yves Fremat, R. H. Østensen, Gert Raskin, Péter Pápics, Herman Hensberge, S. Prins, Alain Jorissen, Boris T. Gänsicke, Pieter Degroote, Detlev Koester, S. Van Eck, Wim Pessemier, S. Pyrzas, H. Van Winckel, Conny Aerts, Steven Bloemen
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 422:2600-2608
We present a light curve analysis and radial velocity study of KOI-74, an eclipsing A star + white dwarf binary with a 5.2 day orbit. Aside from new spectroscopy covering the orbit of the system, we used 212 days of publicly available Kepler observat
Autor:
Pierre F. L. Maxted, R. H. Østensen, L. Morales-Rueda, Jan Deca, M. A. Stark, U. Heber, Chris M. Copperwheat, T. R. Marsh, Richard A. Wade, Gijs Nelemans
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 421:2798-2808
About 50% of all known hot subdwarf B stars (sdBs) reside in close (short period) binaries, for which common envelope ejection is the most likely formation mechanism. However, Han et al. 2003 predict that the majority of sdBs should form through stab
Autor:
Gijs Nelemans, Boris T. Gänsicke, Pierre F. L. Maxted, Stephan Geier, Matthew R. Burleigh, T. R. Marsh, Richard G. West, R. H. Østensen, David R. Anderson, Simon J. O'Toole, Thomas Kupfer, Barry Smalley, Andrew Collier-Cameron, Steven Bloemen, U. Heber
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 418:1156-1164
We report the serendipitous discovery from WASP archive photometry of a binary star in which an apparently normal A-type star (J0247-25A) eclipses a smaller, hotter subdwarf star (J0247-25B). The kinematics of J0247-25A show that it is a blue-straggl