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Stellar Variability of the Exoplanet Hosting Star HD 63454

Kane, Stephen R. and Dragomir, Diana and Ciardi, David R. and Lee, Jae-Woo and Lo Curto, Gaspare and Lovis, Christophe and Naef, Dominique and Mahadevan, Suvrath and Pilyavsky, Genady and Udry, Stephane and Wang, Xuesong X. and Wright, Jason (2011) Stellar Variability of the Exoplanet Hosting Star HD 63454. Astrophysical Journal, 737 (2). Art. No. 58. ISSN 0004-637X.

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Of the hundreds of exoplanets discovered using the radial velocity (RV) technique, many are orbiting close to their host stars with periods less than 10 days. One of these, HD 63454, is a young active K dwarf which hosts a Jovian planet in a 2.82 day period orbit. The planet has a 14% transit probability and a predicted transit depth of 1.2%. Here we provide a re-analysis of the RV data to produce an accurate transit ephemeris. We further analyze 8 nights of time series data to search for stellar activity both intrinsic to the star and induced by possible interactions of the exoplanet with the stellar magnetospheres. We establish the photometric stability of the star at the 3 mmag level despite strong Ca_(II) emission in the spectrum. Finally, we rule out photometric signatures of both star–planet magnetosphere interactions and planetary transit signatures. From this we are able to place constraints on both the orbital and physical properties of the planet.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Kane, Stephen R.0000-0002-7084-0529
Dragomir, Diana0000-0003-2313-467X
Ciardi, David R.0000-0002-5741-3047
Mahadevan, Suvrath0000-0001-9596-7983
Wang, Xuesong X.0000-0002-6937-9034
Wright, Jason0000-0001-6160-5888
Additional Information:© 2011 American Astronomical Society. Received 2011 April 23; accepted 2011 May 27; published 2011 August 3. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. J.-W.L. acknowledges financial support from the Basic Science Research Program (grant no. 20100024954) and the Center for Galaxy Evolution Research through the National Research Foundation of Korea. This research has made use of the NASA/IPAC/NExScI Star and Exoplanet Database, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Pennsylvania State UniversityUNSPECIFIED
Eberly College of ScienceUNSPECIFIED
Pennsylvania Space Grant ConsortiumUNSPECIFIED
National Research Foundation of Korea20100024954
Subject Keywords:planetary systems; stars: individual (HD 63454); techniques: photometric; techniques: radial velocities
Issue or Number:2
Classification Code:PACS: 97.20.Jg; 97.10.Ri; 97.10.Ex; 97.10.Ld
Record Number:CaltechAUTHORS:20110914-114320253
Persistent URL:
Official Citation:Stellar Variability of the Exoplanet Hosting Star HD 63454 Stephen R. Kane et al. 2011 ApJ 737 58
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25346
Deposited By: Ruth Sustaita
Deposited On:16 Sep 2011 16:55
Last Modified:13 Dec 2019 03:44

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