Transits and starspots in the WASP-6 planetary system

Tregloan-Reed, J.; Southworth, J.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Finet, F.; Jørgensen, U. G.; Maier, G.; Mancini, L.; Prof, S.; Ricci, D.; Snodgrass, C.; Bozza, V.; Browne, P.; Dodds, P.; Gerner, T.; Harpsøe, K.; Hinse, T. C.; Hundertmark, M.; Kains, N.; Kerins, E.; Liebig, C.; Penny, M. T.; Rahvar, S.; Sahu, K.; Scarpetta, G.; Schäfer, S.; Schönebeck, F.; Skottfelt, J.; Surdej, Jean

doi:10.1093/mnras/stv730

Download

Article (Scientific journals)

Transits and starspots in the WASP-6 planetary system

Tregloan-Reed, J.; Southworth, J.; Burgdorf, M. et al.

2015 • In Monthly Notices of the Royal Astronomical Society, 450 (2), p. 1760-1769

Peer Reviewed verified by ORBi

Permalink
https://hdl.handle.net/2268/218270

DOI
10.1093/mnras/stv730

Files (1)Send to Details Statistics Bibliography Similar publications

Files

Full Text

Tregloan_Reed_et_al_2015.pdf

Publisher postprint (754.31 kB)

Download

All documents in ORBi are protected by a user license.

Send to

RIS BibTex APA Chicago Permalink X Linkedin

Details

Keywords :

Planetary systems - starspots; Stars: fundamental parameters; Stars: individual: WASP-6; Techniques: photometric

Abstract :

[en] We present updates to PRISM, a photometric transit-starspot model, and GEMC, a hybrid optimization code combining MCMC and a genetic algorithm. We then present high-precision photometry of four transits in the WASP-6 planetary system, two of which contain a starspot anomaly. All four transits were modelled using PRISM and GEMC, and the physical properties of the system calculated. We find the mass and radius of the host star to be 0.836 ± 0.063 M<inf>⊙</inf> and 0.864 ± 0.024 R<inf>⊙</inf>, respectively. For the planet, we find a mass of 0.485 ± 0.027 M<inf>Jup</inf>, a radius of 1.230 ± 0.035 R<inf>Jup</inf> and a density of 0.244 ± 0.014 ρ<inf>Jup</inf>. These values are consistent with those found in the literature. In the likely hypothesis that the two spot anomalies are caused by the same starspot or starspot complex, we measure the stars rotation period and velocity to be 23.80 ± 0.15 d and 1.78 ± 0.20 km s-1, respectively, at a colatitude of 75.8°. We find that the sky-projected angle between the stellar spin axis and the planetary orbital axis is λ = 7.2° ± 3.7°, indicating axial alignment. Our results are consistent with and more precise than published spectroscopic measurements of the Rossiter-McLaughlin effect. These results suggest that WASP-6 b formed at amuch greater distance from its host star and suffered orbital decay through tidal interactions with the protoplanetary disc. © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Tregloan-Reed, J.; NASA Ames Research Center, Moffett Field, CA, United States, Astrophysics Group, Keele University, Staffordshire, United Kingdom

Southworth, J.; Astrophysics Group, Keele University, Staffordshire, United Kingdom

Burgdorf, M.; Universität Hamburg Meteorologisches Institut, Bundesstraße 55, Hamburg, Germany

Calchi Novati, S.; NASA Exoplanet Science Institute,MS 100-22, California Institute of Technology, Pasadena, CA, United States, Dipartimento di Fisica 'E.R. Caianiello', Università di Salerno, Via Giovanni Paolo II 132, Fisciano (SA), Italy, Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy

Dominik, M.; SUPA, University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews, Fife, United Kingdom

Finet, F.; Institut d'Astrophysique et de Géophysique, Université de Liège, Liège, Belgium, Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital, Uttarakhand, India

Jørgensen, U. G.; Niels Bohr Institute, Centre for Star and Planet Formation, University of Copenhagen, Østervoldgade 5, Copenhagen K, Denmark

Maier, G.; Astronomisches Rechen-Institut, Zentrum für Astronomie, Universität Heidelberg, Mönchhofstraße 12-14, Heidelberg, Germany

Mancini, L.; Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, Germany

Prof, S.; Astronomisches Rechen-Institut, Zentrum für Astronomie, Universität Heidelberg, Mönchhofstraße 12-14, Heidelberg, Germany

More authors (20 more)

Language :

English

Title :

Transits and starspots in the WASP-6 planetary system

Publication date :

2015

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Oxford University Press

Volume :

450

Issue :

Pages :

1760-1769

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 15 January 2018

Statistics

Number of views

50 (1 by ULiège)

Number of downloads

121 (0 by ULiège)

More statistics

Scopus citations^®

Scopus citations^®
without self-citations

OpenCitations

OpenAlex citations

Bibliography

Baglin A. et al., 2006, in 36th COSPAR Scientific Assembly, CoRoT: A High Precision Photometer for Stellar Ecolution and Exoplanet Finding. p. 3749
Bakos G., Noyes R.W., Kovács G., Stanek K. Z., Sasselov D. D., Domsa I., 2004, PASP, 116, 266
Ballerini P., Micela G., Lanza A. F., Pagano I., 2012, A&A, 539, A140
Baranne A. et al., 1996, A&AS, 119, 373
Barros S. C. C.,Boué G., Gibson N. P., Pollacco D. L., Santerne A., Keenan F. P., Skillen I., Street R. A., 2013, MNRAS, 430, 3032
Béky B., Kipping D. M., Holman M. J., 2014, MNRAS, 442, 3686
Borucki W. J. et al., 2010, Science, 327, 977
Borucki W. J. et al., 2012, ApJ, 745, 120
Borucki W. J. et al., 2013, Science, 340, 587
Bradshaw S. J., Hartigan P., 2014, ApJ, 795, 79
Brown D. J. A., 2014, MNRAS, 442, 1844
Butler R. P., Marcy G. W., Williams E., McCarthy C., Dosanjh P., Vogt S. S., 1996, PASP, 108, 500
Butler R. P., Marcy G. W., Fischer D. A., Brown T. M., Contos A. R., Korzennik S. G., Nisenson P., Noyes R. W., 1999, ApJ, 526, 916
Carter J. A., Winn J. N., Holman M. J., Fabrycky D., Berta Z. K., Burke C. J., Nutzman P., 2011, ApJ, 730, 82
Claret A., 2000, A&A, 363, 1081
Désert J.-M. et al., 2011, ApJS, 197, 14
Dominik M. et al., 2010, Astron. Nachr., 331, 671
Doyle L. R. et al., 2011, Science, 333, 1602
Doyle A. P. et al., 2013, MNRAS, 428, 3164
Dragomir D. et al., 2011, ApJ, 142, 115
Fabrycky D. C., Winn J. N., 2009, ApJ, 696, 1230
Gelman A., Rubin R., 1992, Stat. Sci., 7, 457
Gillon M. et al., 2009, A&A, 501, 785
Gnevyshev M. N., 1938, Izv. Gl. Astron. Obs. Pulkove, 16, 36
Hellier C., Anderson D. R., Collier-Cameron A., Miller G. R. M., Queloz D., Smalley B., Southworth J., Triaud A. H. M. J., 2011, ApJ, 730, L31
Henwood R., Chapman S. C., Willis D. M., 2010, Solar Phys., 262, 299
Jordán A. et al., 2013, ApJ, 778, 184
Kipping D. M., Dunn W. R., Jasinski J. M., Manthri V. P., 2012, MNRAS, 421, 1166
Maciejewski G., Raetz S., Nettelmann N., Seeliger M., Adam C., Nowak G., Neuhäuser R., 2011, A&A, 535, A7
Mancini L. et al., 2013, MNRAS, 436, 2
Mancini L. et al., 2014, MNRAS, 443, 2391
Mayor M. et al., 2003, The Messenger, 114, 20
Mohler-Fischer M. et al., 2013, A&A, 558, A55
Nikolov N. et al., 2015, MNRAS, 447, 463
Nutzman P. A., Fabrycky D. C., Fortney J. J., 2011, ApJ, 740, L10
Orosz J. A. et al., 2012, Science, 337, 1511
Petrovay K., van Driel-Gesztelyi L., 1997, Solar Phys., 176, 249
Pollacco D. L. et al., 2006, PASP, 118, 1407
Pont F. et al., 2007, A&A, 476, 1347
Price K., Storn R., 1997, Dr. Dobb's J., 264, 18
Queloz D. et al., 2000, A&A, 354, 99
Rabus M. et al., 2009, A&A, 494, 391
Sada P. V. et al., 2012, PASP, 124, 212
Sanchis-Ojeda R., Winn J. N., 2011, ApJ, 743, 61
Sanchis-Ojeda R.,Winn J. N., Holman M. J., Carter J. A., Osip D. J., Fuentes C. I., 2011, ApJ, 733, 127
Schneider J., Dedieu C., Le Sidaner P., Savalle R., Zolotukhin I., 2011, A&A, 532, A79
Schwamb M. E. et al., 2013, ApJ, 768, 127
Silva A. V. R., 2003, ApJ, 585, L147
Silva-Valio A., Lanza A. F., Alonso R., Barge P., 2010, A&A, 510, A25
Southworth J., 2009, MNRAS, 394, 272
Southworth J., 2010, MNRAS, 408, 1689
Southworth J., 2011, MNRAS, 417, 2166
Southworth J. et al., 2009a, MNRAS, 396, 1023
Southworth J. et al., 2009b, MNRAS, 399, 287
Steele I. A., Bates S. D., Gibson N., Keenan F., Meaburn J., Mottram C. J., Pollacco D., Todd I., 2008, in McLean I. S., Casali M. M., eds, Proc. SPIE Conf. Ser. Vol. 7014, Ground-based and Airborne Instrumentation for Astronomy II. SPIE, Bellingham, p. 6
Stetson P. B., 1987, PASP, 99, 191
Storn R., Price K., 1997, J. Global Optimisation, 11, 341
Strassmeier K. G., 2009, A&AR, 17, 251
Ter Braak C. J. F., 2006, Stat. Comput., 16, 239
Tregloan-Reed J., Southworth J., 2013, MNRAS, 431, 966
Tregloan-Reed J., Southworth J., Tappert C., 2013, MNRAS, 428, 3671
Triaud A. H. M. J., 2011, A&A, 534, L6
Waldmeier M., 1955, Leipzig, Geest & Portig, 1955. 2. erweiterte Aufl.
Ward W. R., 1997, Icarus, 126, 261
Welsh W. F. et al., 2012, Nature, 481, 475
Winn J. N., Fabrycky D., Albrecht S., Johnson J. A., 2010a, ApJ, 718, L145
Winn J. N. et al., 2010b, ApJ, 723, L223