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  • American Association for the Advancement of Science (AAAS)  (5)
  • 1
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    Stellar spin-orbit misalignment in a multiplanet system (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-10-19
    Description: Stars hosting hot Jupiters are often observed to have high obliquities, whereas stars with multiple coplanar planets have been seen to have low obliquities. This has been interpreted as evidence that hot-Jupiter formation is linked to dynamical disruption, as opposed to planet migration through a protoplanetary disk. We used asteroseismology to measure a large obliquity for Kepler-56, a red giant star hosting two transiting coplanar planets. These observations show that spin-orbit misalignments are not confined to hot-Jupiter systems. Misalignments in a broader class of systems had been predicted as a consequence of torques from wide-orbiting companions, and indeed radial velocity measurements revealed a third companion in a wide orbit in the Kepler-56 system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huber, Daniel -- Carter, Joshua A -- Barbieri, Mauro -- Miglio, Andrea -- Deck, Katherine M -- Fabrycky, Daniel C -- Montet, Benjamin T -- Buchhave, Lars A -- Chaplin, William J -- Hekker, Saskia -- Montalban, Josefina -- Sanchis-Ojeda, Roberto -- Basu, Sarbani -- Bedding, Timothy R -- Campante, Tiago L -- Christensen-Dalsgaard, Jorgen -- Elsworth, Yvonne P -- Stello, Dennis -- Arentoft, Torben -- Ford, Eric B -- Gilliland, Ronald L -- Handberg, Rasmus -- Howard, Andrew W -- Isaacson, Howard -- Johnson, John Asher -- Karoff, Christoffer -- Kawaler, Steven D -- Kjeldsen, Hans -- Latham, David W -- Lund, Mikkel N -- Lundkvist, Mia -- Marcy, Geoffrey W -- Metcalfe, Travis S -- Silva Aguirre, Victor -- Winn, Joshua N -- New York, N.Y. -- Science. 2013 Oct 18;342(6156):331-4. doi: 10.1126/science.1242066.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉NASA Ames Research Center, MS 244-30, Moffett Field, CA 94035, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24136961" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Solar-like oscillations in a massive star (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-06-23
    Description: Seismology of stars provides insight into the physical mechanisms taking place in their interior, with modes of oscillation probing different layers. Low-amplitude acoustic oscillations excited by turbulent convection were detected four decades ago in the Sun and more recently in low-mass main-sequence stars. Using data gathered by the Convection Rotation and Planetary Transits mission, we report here on the detection of solar-like oscillations in a massive star, V1449 Aql, which is a known large-amplitude (beta Cephei) pulsator.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Belkacem, Kevin -- Samadi, Reza -- Goupil, Marie-Jo -- Lefevre, Laure -- Baudin, Frederic -- Deheuvels, Sebastien -- Dupret, Marc-Antoine -- Appourchaux, Thierry -- Scuflaire, Richard -- Auvergne, Michel -- Catala, Claude -- Michel, Eric -- Miglio, Andrea -- Montalban, Josefina -- Thoul, Anne -- Talon, Suzanne -- Baglin, Annie -- Noels, Arlette -- New York, N.Y. -- Science. 2009 Jun 19;324(5934):1540-2. doi: 10.1126/science.1171913.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique, CNRS (UMR 8109), Observatoire de Paris, Place J. Janssen, F- 92195 Meudon, France. kevin.belkacem@ulg.ac.be〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19541991" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Ensemble asteroseismology of solar-type stars with the NASA Kepler mission (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-04-09
    Description: In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of oscillations in 500 solar-type stars in the Kepler field of view, an ensemble that is large enough to allow statistical studies of intrinsic stellar properties (such as mass, radius, and age) and to test theories of stellar evolution. We find that the distribution of observed masses of these stars shows intriguing differences to predictions from models of synthetic stellar populations in the Galaxy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chaplin, W J -- Kjeldsen, H -- Christensen-Dalsgaard, J -- Basu, S -- Miglio, A -- Appourchaux, T -- Bedding, T R -- Elsworth, Y -- Garcia, R A -- Gilliland, R L -- Girardi, L -- Houdek, G -- Karoff, C -- Kawaler, S D -- Metcalfe, T S -- Molenda-Zakowicz, J -- Monteiro, M J P F G -- Thompson, M J -- Verner, G A -- Ballot, J -- Bonanno, A -- Brandao, I M -- Broomhall, A-M -- Bruntt, H -- Campante, T L -- Corsaro, E -- Creevey, O L -- Dogan, G -- Esch, L -- Gai, N -- Gaulme, P -- Hale, S J -- Handberg, R -- Hekker, S -- Huber, D -- Jimenez, A -- Mathur, S -- Mazumdar, A -- Mosser, B -- New, R -- Pinsonneault, M H -- Pricopi, D -- Quirion, P-O -- Regulo, C -- Salabert, D -- Serenelli, A M -- Silva Aguirre, V -- Sousa, S G -- Stello, D -- Stevens, I R -- Suran, M D -- Uytterhoeven, K -- White, T R -- Borucki, W J -- Brown, T M -- Jenkins, J M -- Kinemuchi, K -- Van Cleve, J -- Klaus, T C -- New York, N.Y. -- Science. 2011 Apr 8;332(6026):213-6. doi: 10.1126/science.1201827.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. w.j.chaplin@bham.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21474754" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    Kepler detected gravity-mode period spacings in a red giant star (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-03-19
    Description: Stellar interiors are inaccessible through direct observations. For this reason, helioseismologists made use of the Sun's acoustic oscillation modes to tune models of its structure. The quest to detect modes that probe the solar core has been ongoing for decades. We report the detection of mixed modes penetrating all the way to the core of an evolved star from 320 days of observations with the Kepler satellite. The period spacings of these mixed modes are directly dependent on the density gradient between the core region and the convective envelope.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Beck, P G -- Bedding, T R -- Mosser, B -- Stello, D -- Garcia, R A -- Kallinger, T -- Hekker, S -- Elsworth, Y -- Frandsen, S -- Carrier, F -- De Ridder, J -- Aerts, C -- White, T R -- Huber, D -- Dupret, M-A -- Montalban, J -- Miglio, A -- Noels, A -- Chaplin, W J -- Kjeldsen, H -- Christensen-Dalsgaard, J -- Gilliland, R L -- Brown, T M -- Kawaler, S D -- Mathur, S -- Jenkins, J M -- New York, N.Y. -- Science. 2011 Apr 8;332(6026):205. doi: 10.1126/science.1201939. Epub 2011 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, 3001 Leuven, Belgium. paul.beck@ster.kuleuven.be〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21415318" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Kepler-36: a pair of planets with neighboring orbits and dissimilar densities (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-06-23
    Description: In the solar system, the planets' compositions vary with orbital distance, with rocky planets in close orbits and lower-density gas giants in wider orbits. The detection of close-in giant planets around other stars was the first clue that this pattern is not universal and that planets' orbits can change substantially after their formation. Here, we report another violation of the orbit-composition pattern: two planets orbiting the same star with orbital distances differing by only 10% and densities differing by a factor of 8. One planet is likely a rocky "super-Earth," whereas the other is more akin to Neptune. These planets are 20 times more closely spaced and have a larger density contrast than any adjacent pair of planets in the solar system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carter, Joshua A -- Agol, Eric -- Chaplin, William J -- Basu, Sarbani -- Bedding, Timothy R -- Buchhave, Lars A -- Christensen-Dalsgaard, Jorgen -- Deck, Katherine M -- Elsworth, Yvonne -- Fabrycky, Daniel C -- Ford, Eric B -- Fortney, Jonathan J -- Hale, Steven J -- Handberg, Rasmus -- Hekker, Saskia -- Holman, Matthew J -- Huber, Daniel -- Karoff, Christopher -- Kawaler, Steven D -- Kjeldsen, Hans -- Lissauer, Jack J -- Lopez, Eric D -- Lund, Mikkel N -- Lundkvist, Mia -- Metcalfe, Travis S -- Miglio, Andrea -- Rogers, Leslie A -- Stello, Dennis -- Borucki, William J -- Bryson, Steve -- Christiansen, Jessie L -- Cochran, William D -- Geary, John C -- Gilliland, Ronald L -- Haas, Michael R -- Hall, Jennifer -- Howard, Andrew W -- Jenkins, Jon M -- Klaus, Todd -- Koch, David G -- Latham, David W -- MacQueen, Phillip J -- Sasselov, Dimitar -- Steffen, Jason H -- Twicken, Joseph D -- Winn, Joshua N -- New York, N.Y. -- Science. 2012 Aug 3;337(6094):556-9. doi: 10.1126/science.1223269. Epub 2012 Jun 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA. jacarter@cfa.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22722249" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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