A much lower density for the transiting extrasolar planet WASP-7
We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68 mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
18 January 2011
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| In: |
Astronomy and astrophysics
Year: 2011, Jahrgang: 527, Pages: 1-5 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201016183 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/201016183 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2011/03/aa16183-10/aa16183-10.html 
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| Verfasserangaben: | J. Southworth, M. Dominik, U.G. Jørgensen, S. Rahvar, C. Snodgrass, K. Alsubai, V. Bozza, P. Browne, M. Burgdorf, S. Calchi Novati, P. Dodds, S. Dreizler, F. Finet, T. Gerner, S. Hardis, K. Harpsøe, C. Hellier, T.C. Hinse, M. Hundertmark, N. Kains, E. Kerins, C. Liebig, L. Mancini, M. Mathiasen, M.T. Penny, S. Proft, D. Ricci, K. Sahu, G. Scarpetta, S. Schäfer, F. Schönebeck, and J. Surdej |
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| 100 | 1 | |a Southworth, John |e VerfasserIn |0 (DE-588)1212262492 |0 (DE-627)1701138026 |4 aut | |
| 245 | 1 | 2 | |a A much lower density for the transiting extrasolar planet WASP-7 |c J. Southworth, M. Dominik, U.G. Jørgensen, S. Rahvar, C. Snodgrass, K. Alsubai, V. Bozza, P. Browne, M. Burgdorf, S. Calchi Novati, P. Dodds, S. Dreizler, F. Finet, T. Gerner, S. Hardis, K. Harpsøe, C. Hellier, T.C. Hinse, M. Hundertmark, N. Kains, E. Kerins, C. Liebig, L. Mancini, M. Mathiasen, M.T. Penny, S. Proft, D. Ricci, K. Sahu, G. Scarpetta, S. Schäfer, F. Schönebeck, and J. Surdej |
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| 500 | |a Gesehen am 19.10.2022 | ||
| 520 | |a We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68 mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought. The planet has a significantly larger radius (1.330 ± 0.093 RJup versus $\er{0.915}{0.046}{0.040}$ 0.91 5 -0.040 + 0.046 RJup) and much lower density (0.41 ± 0.10 ρJup versus $\er{1.26}{0.25}{0.21}$ 1.2 6 -0.21 + 0.25 ρJup) and surface gravity (13.4 ± 2.6 m s-2 versus $\er{26.4}{4.4}{4.0}$ 26. 4 -4.0 + 4.4 m s-2) than previous measurements showed. Based on the revised properties it is no longer an outlier in planetary mass-radius and period-gravity diagrams. We also obtain a more precise transit ephemeris for the WASP-7 system. | ||
| 700 | 1 | |a Dominik, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jørgensen, U. G. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Rahvar, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Snodgrass, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Alsubai, K. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bozza, V. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Browne, P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Burgdorf, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Novati, S. Calchi |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dodds, P. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dreizler, S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Finet, F. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Hardis, S. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Hellier, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hinse, T. C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hundertmark, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Kains, N. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Liebig, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mancini, L. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Mathiasen, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Penny, M. T. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Proft, Svea |e VerfasserIn |0 (DE-588)1019723556 |0 (DE-627)691006857 |0 (DE-576)358628059 |4 aut | |
| 700 | 1 | |a Ricci, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Sahu, K. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Scarpetta, G. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schäfer, S. |e VerfasserIn |4 aut | |
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