Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1

[en] We apply the transit light curve self-contamination technique of Morris et al. to search for the effect of stellar activity on the transits of the ultracool dwarf TRAPPIST-1 with 2018 Spitzer photometry. The self-contamination method fits the transit light curves of planets orbiting spotted stars, allowing the host star to be a source of contaminating positive or negative flux that influences the transit depths but not the ingress/egress durations. We find that none of the planets show statistically significant evidence for self-contamination by bright or dark regions of the stellar photosphere. However, we show that small-scale magnetic activity, analogous in size to the smallest sunspots, could still be lurking undetected in the transit photometry.

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Morris, Brett M. ; Astronomy Department, University of Washington, Seattle, WA 98195, USA

Agol, Eric ; Astronomy Department and Virtual Planetary Laboratory, University of Washington, Seattle, WA 98195, USA

Hebb, Leslie ; Physics Department, Hobart and William Smith Colleges, Geneva, NY 14456, USA

Hawley, Suzanne L. ; Astronomy Department and Virtual Planetary Laboratory, University of Washington, Seattle, WA 98195, USA

Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic

Ducrot, Elsa ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic

Delrez, Laetitia ; University of Cambridge > Cavendish Laboratory

Ingalls, James ; IPAC, California Institute of Technology, 1200 E California Boulevard, Mail Code 314-6, Pasadena, CA 91125, USA

Demory, Brice-Olivier ; University of Bern, Center for Space and Habitability, Gesellschaftsstrasse 6, CH-3012, Bern, Switzerland

Language :

English

Title :

Non-detection of Contamination by Stellar Activity in the Spitzer Transit Light Curves of TRAPPIST-1

Publication date :

01 August 2018

Journal title :

Astrophysical Journal. Letters

ISSN :

2041-8205

eISSN :

2041-8213

Publisher :

Institute of Physics Publishing, Bristol,, United Kingdom

Volume :

863

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://adsabs.harvard.edu/abs/2018ApJ...863L..32M

Available on ORBi :

since 09 October 2018

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Bibliography

Barnes J. R. and Collier Cameron A. 2001 MNRAS 326 950
Barstow J. K. and Irwin P. G. J. 2016 MNRAS 461 L92
Batalha N. E., Lewis N. K., Line M. R., Valenti J. and Stevenson K. 2018 ApJL 856 L34
Burgasser A. J., Logsdon S. E., Gagné J. et al 2015 ApJS 220 18
Claret A., Hauschildt P. H. and Witte S. 2013 A&A 552 A16
Delrez L., Gillon M., Triaud A. H. M. J. et al 2018 MNRAS 475 3577
Ducrot E., Sestovic M., Morris B. M. et al 2018 arXiv:1807.01402
Foreman-Mackey D., Agol E., Ambikasaran S. and Angus R. 2017 AJ 154 220
Foreman-Mackey D., Hogg D. W., Lang D. and Goodman J. 2013 PASP 125 306
Gillon M., Jehin E., Lederer S. M. et al 2016 Natur 533 221
Gillon M., Triaud A. H. M. J., Demory B.-O. et al 2017 Natur 542 456
Grimm S. L., Demory B.-O., Gillon M. et al 2018 A&A 613 A68
Hunter J. D. 2007 CSE 9 90
Jones E., Oliphant T., Peterson P. et al 2001 SciPy: Open Source Scientific Tools for Python http://www.scipy.org/
Luger R., Sestovic M., Kruse E. et al 2017 NatAs 1 0129
Morin J., Donati J.-F., Petit P. et al 2010 MNRAS 407 2269
Morin J., Donati J.-F., Forveille T. et al 2008 MNRAS 384 77
Morley C. V., Kreidberg L., Rustamkulov Z., Robinson T. and Fortney J. J. 2017 ApJ 850 121
Morris B. M., Agol E., Davenport J. R. A. and Hawley S. L. 2018a arXiv:1803.04543
Morris B. M., Agol E., Hebb L. and Hawley S. L. 2018b arXiv:1807.04886
Morris B. M., Hebb L., Davenport J. R. A., Rohn G. and Hawley S. L. 2017 ApJ 846 99
Pérez F. and Granger B. E. 2007 CSE 9 21
Rackham B. V., Apai D. and Giampapa M. S. 2018 ApJ 853 122
Reiners A., Zechmeister M., Caballero J. A. et al 2018 A&A 612 A49
Roettenbacher R. M. and Kane S. R. 2017 ApJ 851 77
Sanchis-Ojeda R. and Winn J. N. 2011 ApJ 743 61
Solanki S. K. 2003 A&ARv 11 153
Strassmeier K. G. 2002 AN 323 309
The Astropy Collaboration, Price-Whelan A. M., Sipocz B. M. et al 2018 arXiv:1801.02634
Van Der Walt S., Colbert S. C. and Varoquaux G. 2011 arXiv:1102.1523
West A. A., Hawley S. L., Bochanski J. J. et al 2008 AJ 135 785
West A. A., Weisenburger K. L., Irwin J. et al 2015 ApJ 812 3
Zhang Z., Zhou Y., Rackham B. and Apai D. 2018 arXiv:1802.02086

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