THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI
Binaries are not always neatly aligned. Previous observations of the DI Her system showed that the spin axes of both stars are highly inclined with respect to one another and the orbital axis. Here, we report on a measurement of the spin-axis orientation of the primary star of the NY Cep system, whi...
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| Format: | Article |
| Language: | en_US |
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Institute of Physics Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/72330 https://orcid.org/0000-0002-4265-047X |
| _version_ | 1826217112405803008 |
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| author | Albrecht, Simon H. Winn, Joshua Nathan Carter, Joshua Adam Snellen, Ignas A. G. Mooij, Ernst J. W. de |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Albrecht, Simon H. Winn, Joshua Nathan Carter, Joshua Adam Snellen, Ignas A. G. Mooij, Ernst J. W. de |
| author_sort | Albrecht, Simon H. |
| collection | MIT |
| description | Binaries are not always neatly aligned. Previous observations of the DI Her system showed that the spin axes of both stars are highly inclined with respect to one another and the orbital axis. Here, we report on a measurement of the spin-axis orientation of the primary star of the NY Cep system, which is similar to DI Her in many respects: it features two young early-type stars (~6 Myr, B0.5V+B2V), in an eccentric and relatively long-period orbit (e = 0.48, P = 15fd3). The sky projections of the rotation vector and the spin vector are well aligned (beta [subscript p] = 2[degrees] ± 4[degrees]), in strong contrast to DI Her. Although no convincing explanation has yet been given for the misalignment of DI Her, our results show that the phenomenon is not universal, and that a successful theory will need to account for the different outcome in the case of NY Cep. |
| first_indexed | 2024-09-23T16:58:13Z |
| format | Article |
| id | mit-1721.1/72330 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:58:13Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing |
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| spelling | mit-1721.1/723302022-10-03T09:31:03Z THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI Albrecht, Simon H. Winn, Joshua Nathan Carter, Joshua Adam Snellen, Ignas A. G. Mooij, Ernst J. W. de Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Winn, Joshua Nathan Winn, Joshua Nathan Albrecht, Simon H. Carter, Joshua Adam Binaries are not always neatly aligned. Previous observations of the DI Her system showed that the spin axes of both stars are highly inclined with respect to one another and the orbital axis. Here, we report on a measurement of the spin-axis orientation of the primary star of the NY Cep system, which is similar to DI Her in many respects: it features two young early-type stars (~6 Myr, B0.5V+B2V), in an eccentric and relatively long-period orbit (e = 0.48, P = 15fd3). The sky projections of the rotation vector and the spin vector are well aligned (beta [subscript p] = 2[degrees] ± 4[degrees]), in strong contrast to DI Her. Although no convincing explanation has yet been given for the misalignment of DI Her, our results show that the phenomenon is not universal, and that a successful theory will need to account for the different outcome in the case of NY Cep. United States. National Aeronautics and Space Administration (Origins grant (NNX09AD36G) 2012-08-22T19:56:21Z 2012-08-22T19:56:21Z 2010-12 2010-09 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/72330 Albrecht, Simon et al. “THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI.” The Astrophysical Journal 726.2 (2011): 68. Web. https://orcid.org/0000-0002-4265-047X en_US http://dx.doi.org/10.1088/0004-637x/726/2/68 Astrophysical Journal Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Institute of Physics Publishing Prof. Winn via Mat Willmott |
| spellingShingle | Albrecht, Simon H. Winn, Joshua Nathan Carter, Joshua Adam Snellen, Ignas A. G. Mooij, Ernst J. W. de THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title | THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title_full | THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title_fullStr | THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title_full_unstemmed | THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title_short | THE BANANA PROJECT. III. SPIN-ORBIT ALIGNMENT IN THE LONG-PERIOD ECLIPSING BINARY NY CEPHEI |
| title_sort | banana project iii spin orbit alignment in the long period eclipsing binary ny cephei |
| url | http://hdl.handle.net/1721.1/72330 https://orcid.org/0000-0002-4265-047X |
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