The Discovery Of Hd 37605C And A Dispositive Null Detection Of Transits Of Hd 37605B

dc.contributor.utaustinauthorCochran, Williamen_US
dc.contributor.utaustinauthorEndl, Michaelen_US
dc.contributor.utaustinauthorMacQueen, Phillipen_US
dc.creatorWang, Sharon Xuesongen_US
dc.creatorWright, Jason T.en_US
dc.creatorCochran, Williamen_US
dc.creatorKane, Steven R.en_US
dc.creatorHenry, Gregory W.en_US
dc.creatorPayne, Matthew J.en_US
dc.creatorEndl, Michaelen_US
dc.creatorMacQueen, Phillip J.en_US
dc.creatorValenti, Jeff A.en_US
dc.creatorAntoci, Victoriaen_US
dc.creatorDragomir, Dianaen_US
dc.creatorMatthews, Jaymie M.en_US
dc.creatorHoward, Andrew W.en_US
dc.creatorMarcy, Geoffrey W.en_US
dc.creatorIsaacson, Howarden_US
dc.creatorFord, Eric B.en_US
dc.creatorMahadevan, Suvrathen_US
dc.creatorvon Braun, Kasparen_US
dc.description.abstractWe report the radial velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P similar to 55 days Jovian planet, HD 37605b. This second planet, HD 37605c, has a period of similar to 7.5 years with a low eccentricity and an M sin i of similar to 3.4 M-Jup. Our discovery was made with the nearly 8 years of radial velocity follow-up at the Hobby-Eberly Telescope and Keck Observatory, including observations made as part of the Transit Ephemeris Refinement and Monitoring Survey effort to provide precise ephemerides to long-period planets for transit follow-up. With a total of 137 radial velocity observations covering almost 8 years, we provide a good orbital solution of the HD 37605 system, and a precise transit ephemeris for HD 37605b. Our dynamic analysis reveals very minimal planet-planet interaction and an insignificant transit time variation. Using the predicted ephemeris, we performed a transit search for HD 37605b with the photometric data taken by the T12 0.8 m Automatic Photoelectric Telescope (APT) and the MOST satellite. Though the APT photometry did not capture the transit window, it characterized the stellar activity of HD 37605, which is consistent of it being an old, inactive star, with a tentative rotation period of 57.67 days. The MOST photometry enabled us to report a dispositive null detection of a non-grazing transit for this planet. Within the predicted transit window, we exclude an edge-on predicted depth of 1.9% at the >> 10 sigma level, and exclude any transit with an impact parameter b > 0.951 at greater than 5 sigma. We present the BOOTTRAN package for calculating Keplerian orbital parameter uncertainties via bootstrapping. We made a comparison and found consistency between our orbital fit parameters calculated by the RVLIN package and error bars by BOOTTRAN with those produced by a Bayesian analysis using MCMC.en_US
dc.description.departmentMcDonald Observatoryen_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.description.sponsorshipNASA NNX10AI52G, NNX09AB30G, NNX09AB35Gen_US
dc.description.sponsorshipUniversity of British Columbiaen_US
dc.description.sponsorshipCenter for Exoplanets and Habitable Worldsen_US
dc.description.sponsorshipPennsylvania State Universityen_US
dc.description.sponsorshipEberly College of Scienceen_US
dc.description.sponsorshipPennsylvania Space Grant Consortiumen_US
dc.identifier.citationWang, Sharon Xuesong, Jason T. Wright, William Cochran, Stephen R. Kane, Gregory W. Henry, Matthew J. Payne, Michael Endl et al. "The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b." The Astrophysical Journal, Vol. 761, No. 1 (Dec., 2012): 46.en_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectplanetary systemsen_US
dc.subjectstars: individual (hd 37605)en_US
dc.subjecthobby-eberly telescopeen_US
dc.subjectextra-solar planetsen_US
dc.subjectsun-like starsen_US
dc.subjectmagnetic cyclesen_US
dc.subjectharps searchen_US
dc.subjectmass planeten_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Discovery Of Hd 37605C And A Dispositive Null Detection Of Transits Of Hd 37605Ben_US
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